{"id":2290,"date":"2022-10-31T10:43:52","date_gmt":"2022-10-31T03:43:52","guid":{"rendered":"http:\/\/vafs.gov.vn\/en\/?p=2290"},"modified":"2023-11-23T12:24:50","modified_gmt":"2023-11-23T05:24:50","slug":"vietnam-journal-of-forest-science-number-1-2022","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/en\/2022\/10\/vietnam-journal-of-forest-science-number-1-2022\/","title":{"rendered":"Vietnam Journal of Forest Science Number 1-2022"},"content":{"rendered":"

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<\/a><\/a><\/a>T\u1ea0P CH\u00cd KHOA H\u1eccC L\u00c2M NGHI\u1ec6P S\u1ed0 <\/strong>1<\/strong> – <\/strong>20<\/strong>2<\/strong>2<\/strong><\/p>\n

 <\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
1.<\/td>\n\u0110\u1eb7c \u0111i\u1ec3m c\u1ee7a h\u1ed9 gia \u0111\u00ecnh ng\u01b0\u1eddi Dao khai th\u00e1c d\u01b0\u1ee3c th\u1ea3o t\u1ea1i huy\u1ec7n Ho\u00e0ng Su Ph\u00ec, t\u1ec9nh H\u00e0 Giang<\/td>\nCharacteristics of Dao ethnic households exploiting medicinal plants in Hoang Su Phi, Ha Giang province<\/td>\nNguy\u1ec5n Th\u1ecb Thu Huy\u1ec1n
\nL\u00fd T\u00e0 N\u00e1i
\nPh\u1ea1m V\u0103n \u0110i\u1ec3n<\/em><\/td>\n		5<\/td>\n<\/td>\n<\/tr>\n
2.<\/td>\nNghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng h\u1eefu t\u00ednh c\u00e2y B\u1ea1ch t\u00f9ng (Dacrycarpus imbricatus <\/em>(Blume) de Laub)<\/td>\nResearch on the propagation of Dacrycarpus imbricatus <\/em>(Blume) de Laub from seeds<\/td>\nL\u00ea Th\u1ecb Th\u00fay H\u00f2a
\n<\/em>L\u00ea H\u1ed3ng \u00c9n
\nB\u00f9i V\u0103n Tr\u1ecdng
\nNguy\u1ec5n Thanh Nguy\u00ean
\nGiang Th\u1ecb Thanh<\/em><\/td>\n		15<\/td>\n<\/td>\n<\/tr>\n
3.<\/td>\nHi\u1ec7n tr\u1ea1ng ph\u00e2n b\u1ed1 v\u00e0 \u0111\u1eb7c \u0111i\u1ec3m l\u00e2m h\u1ecdc lo\u00e0i B\u00e1ch t\u00e1n \u0111\u00e0i loan (Taiwania cryptomerioides <\/em>Hayata)
\nt\u1ea1i Khu b\u1ea3o t\u1ed3n thi\u00ean nhi\u00ean Ho\u00e0ng Li\u00ean – V\u0103n B\u00e0n,
\nL\u00e0o Cai<\/td>\n		The distribution status and silvicultural characteristics of Taiwania cryptomerioides Hayata in Hoang Lien – Van Ban Nature Reserve, Lao Cai province<\/td>\nLa \u00c1nh D\u01b0\u01a1ng
\nPh\u00ed H\u1ed3ng H\u1ea3i
\nDo\u00e3n Ho\u00e0ng S\u01a1n
\nTr\u1ecbnh V\u0103n Hi\u1ec7u
\nH\u00e0 Huy Nh\u1eadt<\/em><\/td>\n		26<\/td>\n<\/td>\n<\/tr>\n
4.<\/td>\nHi\u1ec7n tr\u1ea1ng ph\u00e2n b\u1ed1 v\u00e0 \u0111\u1eb7c \u0111i\u1ec3m l\u00e2m h\u1ecdc lo\u00e0i S\u1ebfn m\u1eadt (Madhuca pasquieri <\/em>(Dubard) H. J. Lam)
\nt\u1ea1i Khu b\u1ea3o t\u1ed3n thi\u00ean nhi\u00ean Xu\u00e2n Nha, S\u01a1n La<\/td>\n		The distribution status and silvicultural characteristics of Madhuca pasquieri<\/em> (Dubard) H. J. Lam in Xuan Nha Nature Reserve, Son La province<\/td>\nPh\u00ed H\u1ed3ng H\u1ea3i
\nLa \u00c1nh D\u01b0\u01a1ng
\nDo\u00e3n Ho\u00e0ng S\u01a1n
\nTr\u1ecbnh V\u0103n Hi\u1ec7u
\nH\u00e0 Huy Nh\u1eadt<\/em><\/td>\n		36<\/td>\n<\/td>\n<\/tr>\n
5.<\/td>\nNghi\u00ean c\u1ee9u m\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m l\u00e2m h\u1ecdc c\u1ee7a lo\u00e0i T\u00f4 h\u1ea1p \u0111i\u1ec7n bi\u00ean (Altingia siamensis<\/em> Craib) t\u1ea1i Ban qu\u1ea3n l\u00fd di t\u00edch l\u1ecbch s\u1eed v\u00e0 c\u1ea3nh quan m\u00f4i tr\u01b0\u1eddng M\u01b0\u1eddng Ph\u0103ng, t\u1ec9nh \u0110i\u1ec7n Bi\u00ean<\/td>\nSilvicultural characteristics of Altingia siamensis<\/em> Craib in the forest of the Forest Management Board of Historical Relics and Environmental Landscapes of Muong Phang, Dien Bien province<\/td>\nNguy\u1ec5n V\u0103n H\u00f9ng
\nV\u00f5 \u0110\u1ea1i H\u1ea3i
\nNguy\u1ec5n Th\u1ecb H\u01b0\u01a1ng Ly
\nNguy\u1ec5n H\u1ed3ng H\u1ea3i
\nV\u0169 V\u0103n Tu\u00e2n<\/em><\/td>\n		45<\/td>\n<\/td>\n<\/tr>\n
6.<\/td>\nNghi\u00ean c\u1ee9u c\u1ea5u tr\u00fac r\u1eebng h\u1ed7n giao l\u00e1 r\u1ed9ng – l\u00e1 kim t\u1ea1i V\u01b0\u1eddn qu\u1ed1c gia Bidoup – N\u00fai B\u00e0, t\u1ec9nh L\u00e2m \u0110\u1ed3ng<\/td>\nStudy on the structure of the mixed broadleaf and coniferous forest in Bidoup – Nui Ba National Park, Lam Dong province<\/td>\n\u0110\u1ed7<\/em> Th\u1ecb H\u1ed3ng H\u00f2a
\n\u0110\u1eb7ng Minh Tr\u00ed
\nNguy\u1ec5n<\/em> Qu\u1ed1c \u0110\u1ea1t
\nNguy\u1ec5n L\u00ea Xu\u00e2n B\u00e1ch
\nPhan Minh S\u00e1ng
\n<\/em>Nguy\u1ec5n Th\u1ebf V\u0103n
\nNguy\u1ec5n<\/em> Th\u00e0nh L\u1ef1c
\nL\u00ea B\u1eedu Th\u1ea1ch
\nL\u00ea V\u0103n H\u01b0\u01a1ng
\nL\u00ea V\u0103n S\u01a1n
\n<\/em>V\u0169 Ng\u1ecdc Long
\nL\u01b0u<\/em> H\u1ed3ng Tr\u01b0\u1eddng<\/em><\/td>\n		57<\/td>\n<\/td>\n<\/tr>\n
7.<\/td>\nC\u01a1 ch\u1ebf duy tr\u00ec \u0111a d\u1ea1ng lo\u00e0i c\u00e2y g\u1ed7 trong r\u1eebng l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh \u1edf khu v\u1ef1c Ia M\u01a1r, t\u1ec9nh Gia Lai<\/td>\nDiversity maintenance mechanism of woody plant in an Ia Mor evergreen broadleaved forest, Gia Lai province<\/td>\nNguy\u1ec5n V\u0103n Qu\u00fd
\nB\u00f9i M\u1ea1nh H\u01b0ng
\nNguy\u1ec5n H\u1eefu Th\u1ebf
\nNguy\u1ec5n V\u0103n H\u1ee3p
\nNguy\u1ec5n Thanh Tu\u1ea5n<\/em><\/td>\n		68<\/td>\n<\/td>\n<\/tr>\n
8.<\/td>\n\u0110\u00e1nh gi\u00e1 s\u1ef1 ph\u00f9 h\u1ee3p sinh th\u00e1i v\u00e0 \u0111\u1ec1 xu\u1ea5t quy ho\u1ea1ch ph\u00e1t tri\u1ec3n c\u00e2y Hu\u1ef7nh (Tarrietia<\/em> javanica<\/em> Blume) t\u1ea1i t\u1ec9nh Qu\u1ea3ng B\u00ecnh<\/td>\nAssessing ecological suitability and proposing planning solutions for development of Tarri<\/em>etia javanica<\/em> Blume in Quang Binh province<\/td>\nV\u0169 \u0110\u1ee9c B\u00ecnh
\nNguy\u1ec5n V\u0103n L\u1ee3i
\nNguy\u1ec5n<\/em> Th\u1ecb Th\u1ea3o Trang,<\/sup>
\nNguy\u1ec5n Th\u1ecb Thanh Nga<\/em><\/td>\n		83<\/td>\n<\/td>\n<\/tr>\n
9.<\/td>\n\u0110\u00e1nh gi\u00e1 sinh tr\u01b0\u1edfng m\u1ed9t s\u1ed1 m\u00f4 h\u00ecnh tr\u1ed3ng c\u00e2y b\u1ea3n \u0111\u1ecba d\u01b0\u1edbi t\u00e1n r\u1eebng t\u1ea1i S\u00f3c S\u01a1n, H\u00e0 N\u1ed9i<\/td>\nGrowth assessment of some understorey planting models for native species in Soc Son district, Ha Noi<\/td>\nPh\u1ea1m Ng\u1ecdc Th\u00e0nh
\nT\u1ea1 V\u0103n H\u00e2n
\nNguy\u1ec5n Xu\u00e2n \u0110\u00e0i
\nTr\u01b0\u01a1ng Quang Tr\u00ed
\nH\u00e0 \u0110\u00ecnh Long
\nH\u00e0 V\u0103n N\u0103m<\/em><\/td>\n		93<\/td>\n<\/td>\n<\/tr>\n
10.<\/td>\nS\u1eed d\u1ee5ng \u1ea3nh Sentinel 2 v\u00e0 Google Earth Engine \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 bi\u1ebfn \u0111\u1ed9ng di\u1ec7n t\u00edch r\u1eebng ph\u00f2ng h\u1ed9 v\u00e0 \u0111\u1eb7c d\u1ee5ng t\u1ea1i huy\u1ec7n V\u00f5 Nhai, t\u1ec9nh
\nTh\u00e1i Nguy\u00ean<\/td>\n		Using Sentinel 2 data on Google Earth Engine cloud computing platform for assesssing forest cover change in special use and protection forests in Vo Nhai district, Thai Nguyen province<\/td>\nNguy\u1ec5n \u0110\u0103ng C\u01b0\u1eddng
\nPh\u1ea1m \u0110\u1ee9c Ch\u00ednh
\nNguy\u1ec5n V\u0103n B\u00edch<\/em><\/td>\n		106<\/td>\n<\/td>\n<\/tr>\n
11.<\/td>\nD\u1ea5u v\u1ebft Carbon trong s\u1ea3n xu\u1ea5t g\u1ed7 tr\u00f2n, g\u1ed7 x\u1ebb v\u00e0 d\u0103m g\u1ed7 t\u1eeb r\u1eebng tr\u1ed3ng keo \u1edf v\u00f9ng \u0110\u00f4ng B\u1eafc B\u1ed9<\/td>\nCarbon footprint in production of round wood, sawn-timber and wood chips produced from acacia plantation in the North East Region<\/td>\nNguy\u1ec5n Th\u00f9y M\u1ef9 Linh
\nV\u0169 T\u1ea5n Ph\u01b0\u01a1ng
\nL\u00ea Th\u1ecb Thu H\u1eb1ng
\nHo\u00e0ng Nguy\u1ec5n Vi\u1ec7t Hoa<\/em>
\nNguy\u1ec5n Anh D\u0169ng<\/em><\/td>\n		115<\/td>\n<\/td>\n<\/tr>\n
12.<\/td>\nPh\u00e2n t\u00edch hi\u1ec7u qu\u1ea3 kinh t\u1ebf – t\u00e0i ch\u00ednh c\u1ee7a \u0111\u1ec1 \u00e1n ph\u00e1t tri\u1ec3n du l\u1ecbch sinh th\u00e1i V\u01b0\u1eddn qu\u1ed1c gia C\u00e1t Ti\u00ean giai \u0111o\u1ea1n
\n2021 – 2030<\/td>\n		Financial and economic analysis for Cat Tien National Park Ecotourism Plan in the period of
\n2021 – 2030<\/td>\n		Tr\u1ea7n Th\u1ecb Thu H\u00e0
\n<\/em>H\u00e0 Th\u1ecb Ph\u01b0\u01a1ng Th\u1ea3o<\/em><\/td>\n		129<\/td>\n<\/tr>\n
13.<\/td>\nPh\u00e2n t\u00edch c\u00e1c ch\u00ednh s\u00e1ch ph\u00e1t tri\u1ec3n r\u1eebng tr\u1ed3ng quy m\u00f4 h\u1ed9 gia \u0111\u00ecnh, tr\u01b0\u1eddng h\u1ee3p nghi\u00ean c\u1ee9u \u0111i\u1ec3m t\u1ea1i t\u1ec9nh Qu\u1ea3ng Tr\u1ecb<\/td>\nAnalyzing policies to promote household plantation, case study in Quang Tri province<\/td>\nNguy\u1ec5n Ho\u00e0ng Ti\u1ec7p
\nV\u00f5 \u0110\u1ea1i H\u1ea3i<\/em><\/td>\n		137<\/td>\n<\/tr>\n
14.<\/td>\nNghi\u00ean c\u1ee9u \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a v\u1eadt li\u1ec7u ch\u00e1y d\u01b0\u1edbi t\u00e1n r\u1eebng th\u00f4ng \u1edf Vi\u1ec7t Nam<\/td>\nResearch on characteristics of flammable material under Pinus sp forest canopy in Vietnam<\/td>\nV\u0169 V\u0103n \u0110\u1ecbnh<\/em><\/td>\n153<\/td>\n<\/tr>\n
15.<\/td>\n\u0110\u00e1nh gi\u00e1 hi\u1ec7u l\u1ef1c c\u1ee7a m\u1ed9t s\u1ed1 lo\u1ea1i thu\u1ed1c sinh h\u1ecdc v\u00e0 h\u00f3a h\u1ecdc \u1ee9c ch\u1ebf n\u1ea5m Fusarium solani<\/em> g\u00e2y b\u1ec7nh th\u1ed1i m\u0103ng Tre B\u00e1t \u0110\u1ed9<\/td>\nEvaluation of inhibitory effectiveness of some biological and chemical fungicides against fungalpathogen Fusarium solani<\/em> causing the shoot rot disease on Bat do bamboo<\/td>\nTr\u1ea7n Xu\u00e2n H\u01b0ng,
\nNguy\u1ec5n Th\u1ecb Minh H\u1eb1ng<\/em><\/td>\n		161<\/td>\n<\/tr>\n
16.<\/td>\nCh\u00e2u ch\u1ea5u tre l\u01b0ng v\u00e0ng (Ceracris kiangsu <\/em>Tsai) h\u1ea1i lu\u1ed3ng, v\u1ea7u v\u00e0 n\u1ee9a t\u1ea1i t\u1ec9nh Thanh H\u00f3a<\/td>\nYellow-spined bamboo locust (Ceracris kiangsu <\/em>Tsai) damaging bamboo
\nin Thanh Hoa province<\/td>\n		Nguy\u1ec5n Minh Ch\u00ed<\/em><\/td>\n169<\/td>\n<\/tr>\n
17.<\/td>\n\u1ea2nh h\u01b0\u1edfng c\u1ee7a l\u1eadp \u0111\u1ecba \u0111\u1ebfn sinh tr\u01b0\u1edfng c\u1ee7a r\u1eebng B\u1ea7n tr\u1eafng (Sonneratia alba <\/em>J. Smith) \u1edf khu v\u1ef1c ven bi\u1ec3n t\u1ec9nh Th\u1eeba Thi\u00ean – Hu\u1ebf<\/td>\nInfluence of site on growth of Sonneratia alba <\/em>J. Smith forest in the coastal area of Thua Thien – Hue province<\/td>\nL\u00ea Thanh Quang
\nTh\u00e1i Th\u00e0nh L\u01b0\u1ee3m
\nAkihiro Itai
\nHo\u00e0ng V\u0103n Th\u01a1i
\nKi\u1ec1u Tu\u1ea5n \u0110\u1ea1t
\nNguy\u1ec5n Kh\u1eafc \u0110i\u1ec7u
\nKi\u1ec1u M\u1ea1nh H\u00e0<\/em><\/td>\n		177<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

\u0110\u1eb6C \u0110I\u1ec2M C\u1ee6A H\u1ed8 GIA \u0110\u00ccNH NG\u01af\u1edcI DAO KHAI TH\u00c1C D\u01af\u1ee2C TH\u1ea2O\u00a0T\u1ea0I HUY\u1ec6N HO\u00c0NG SU PH\u00cc, T\u1ec8NH H\u00c0 GIANG<\/p>\n

Nguy\u1ec5n Th\u1ecb Thu Huy\u1ec1n1<\/sup>, L\u00fd T\u00e0 N\u00e1i2<\/sup>, Ph\u1ea1m V\u0103n \u0110i\u1ec3n3<\/sup><\/p>\n

1<\/sup>UNDP – H\u00e0 N\u1ed9i – Vi\u1ec7t Nam
\n2<\/sup>Chi c\u1ee5c Ki\u1ec3m l\u00e2m t\u1ec9nh H\u00e0 Giang
\n3<\/sup>B\u1ed9 N\u00f4ng nghi\u1ec7p v\u00e0 PTNT<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

B\u00e0i b\u00e1o t\u1eadp trung v\u00e0o vi\u1ec7c ph\u00e2n t\u00edch m\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a h\u1ed9 gia \u0111\u00ecnh d\u00e2n t\u1ed9c Dao khai th\u00e1c d\u01b0\u1ee3c th\u1ea3o t\u1eeb r\u1eebng t\u1ea1i x\u00e3 H\u1ed3 Th\u1ea7u, huy\u1ec7n Ho\u00e0ng Su Ph\u00ec, t\u1ec9nh H\u00e0 Giang. S\u1ed1 li\u1ec7u \u0111i\u1ec1u tra \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n trong n\u0103m 2017 \u0111\u1ed1i v\u1edbi 30 h\u1ed9 gia \u0111\u00ecnh c\u00f3 ho\u1ea1t \u0111\u1ed9ng khai th\u00e1c t\u1eeb 1 \u0111\u1ebfn 6 lo\u00e0i d\u01b0\u1ee3c th\u1ea3o. Vi\u1ec7c ph\u00e2n t\u00edch s\u1ed1 li\u1ec7u \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1eb1ng ph\u00e2n t\u00edch \u0111\u1ecbnh t\u00ednh k\u1ebft h\u1ee3p v\u1edbi ph\u00e2n t\u00edch th\u1ed1ng k\u00ea, s\u1eed d\u1ee5ng c\u00e1c s\u01a1 \u0111\u1ed3 nh\u00e1nh (cluster dendrogram), k\u1ef9 thu\u1eadt m\u00f4 t\u1ea3 kh\u00f4ng gian \u0111a chi\u1ec1u (multi-dimentional scaling), bi\u1ec3u \u0111\u1ed3 t\u00e1n x\u1ea1 (scatter chart) v\u00e0 s\u01a1 \u0111\u1ed3 c\u00e2y li\u00ean k\u1ebft (linktree). K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y, s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 \u0111\u1eb7c \u0111i\u1ec3m khai th\u00e1c d\u01b0\u1ee3c th\u1ea3o c\u1ee7a c\u00e1c h\u1ed9 gia \u0111\u00ecnh l\u00e0 l\u1edbn h\u01a1n so v\u1edbi s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 \u0111\u1eb7c \u0111i\u1ec3m gi\u1eefa c\u00e1c h\u1ed9 gia \u0111\u00ecnh v\u1edbi nhau. C\u00f3 m\u1ed1i li\u00ean h\u1ec7 r\u00f5 r\u1ec7t gi\u1eefa s\u1ed1 lao \u0111\u1ed9ng v\u1edbi s\u1ed1 nh\u00e2n kh\u1ea9u, t\u1ed5ng di\u1ec7n t\u00edch \u0111\u1ea5t c\u1ee7a h\u1ed9 v\u1edbi s\u1ed1 nh\u00e2n kh\u1ea9u, s\u1ea3n l\u01b0\u1ee3ng khai th\u00e1c d\u01b0\u1ee3c th\u1ea3o v\u1edbi di\u1ec7n t\u00edch r\u1eebng tr\u1ed3ng c\u1ee7a h\u1ed9 gia \u0111\u00ecnh, s\u1ed1 h\u1ed9 tr\u1ed3ng v\u1edbi s\u1ed1 h\u1ed9 s\u01a1 ch\u1ebf, b\u1ea3o qu\u1ea3n; gi\u1eefa s\u1ed1 h\u1ed9 khai th\u00e1c \u1edf r\u1eebng t\u1ef1 nhi\u00ean v\u1edbi di\u1ec7n t\u00edch d\u1ef1 ki\u1ebfn tr\u1ed3ng; thu nh\u1eadp trung b\u00ecnh c\u1ee7a h\u1ed9 gia \u0111\u00ecnh (HG\u0110) v\u1edbi di\u1ec7n t\u00edch khai th\u00e1c \u1edf r\u1eebng t\u1ef1 nhi\u00ean. V\u1edbi m\u1ee9c \u0111\u1ed9 t\u01b0\u01a1ng \u0111\u1ed3ng l\u00e0 80%, c\u00e1c h\u1ed9 gia \u0111\u00ecnh c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c chia th\u00e0nh 7 nh\u00f3m (s\u1eed d\u1ee5ng 3 ho\u1eb7c 11 ti\u00eau ch\u00ed), 2 nh\u00f3m (s\u1eed d\u1ee5ng 8 ti\u00eau ch\u00ed). S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa c\u00e1c nh\u00f3m HG\u0110 ch\u1ecbu s\u1ef1 chi ph\u1ed1i c\u1ee7a ba y\u1ebfu t\u1ed1 ch\u00ednh l\u00e0 s\u1ea3n l\u01b0\u1ee3ng khai th\u00e1c, di\u1ec7n t\u00edch r\u1eebng tr\u1ed3ng v\u00e0 s\u1ed1 ti\u1ec1n thu \u0111\u01b0\u1ee3c t\u1eeb khai th\u00e1c d\u01b0\u1ee3c th\u1ea3o. V\u1edbi nh\u1eefng k\u1ebft qu\u1ea3 \u0111\u1ea1t \u0111\u01b0\u1ee3c, b\u00e0i b\u00e1o c\u00f3 \u00fd ngh\u0129a tham kh\u1ea3o cho vi\u1ec7c t\u1ed5 ch\u1ee9c li\u00ean k\u1ebft h\u1ed9 trong khai th\u00e1c d\u01b0\u1ee3c th\u1ea3o d\u1ef1a tr\u00ean s\u1ef1 t\u01b0\u01a1ng \u0111\u1ed3ng v\u1ec1 \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a nh\u00f3m h\u1ed9 gia \u0111\u00ecnh.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> H\u1ed9 gia \u0111\u00ecnh ng\u01b0\u1eddi Dao, d\u01b0\u1ee3c th\u1ea3o, x\u00e3 H\u1ed3 Th\u1ea7u – huy\u1ec7n Ho\u00e0ng Su Ph\u00ec – t\u1ec9nh H\u00e0 Giang<\/td>\n<\/tr>\n

\n

Characteristics of Dao ethnic households exploiting medicinal plants in Hoang Su Phi district, Ha Giang province<\/strong><\/p>\n

The article addresses some characteristics of Dao ethnic households exploiting medicinal plants from forests in Ho Thau commune, Hoang Su Phi district, Ha Giang province. The survey was conducted in 2017 on 30 households with exploitation activities from 1 to 6 species of medicinal plants. The qualitative analysis combined with statistical analysis, cluster dendrograms, multi-dimensional scaling, scatter chart, and the link-tree diagram is used in the study. Results have shown that the difference in exploitation characteristics of medicinal plants by households is more significant than the difference in livelihood characteristics between households. There is a clear relationship between the number of workers and the number of people in the household; the total land area of \u200b\u200bthe household and the number of people; the yield of medicinal plants exploited and the area of \u200b\u200bplanted forests of the household, the number of households planting medicinal plants and the number of households which preliminarily process and preserve medicinal plants; the number of households exploiting in natural forests and the planned planting area; average household income with the exploitation area in natural forest. With the similarity of 80%, households can be divided into seven groups (using 3 or 11 criteria) and two groups (using eight criteria). Three main factors influence the difference between groups of households: the yield of exploitation, planted forest area, and the amount of money got from the exploitation of medicinal plants. Based on results, the article is considered a significant reference for organizing households by groups based on similarities in their characteristics in the exploitation of medicinal plants.<\/p>\n

Keywords:<\/em><\/strong> Dao ethnic household, medicinal plant, Ho Thau commune – Hoang Su Phi district – Ha Giang province<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

NGHI\u00caN C\u1ee8U NH\u00c2N GI\u1ed0NG H\u1eeeU T\u00cdNH \\C\u00c2Y B\u1ea0CH T\u00d9NG (Dacrycarpus imbricatus <\/em>(Blume) de Laub)<\/p>\n

L\u00ea Th\u1ecb Th\u00fay H\u00f2a, L\u00ea H\u1ed3ng \u00c9n, B\u00f9i V\u0103n Tr\u1ecdng, Nguy\u1ec5n Thanh Nguy\u00ean, Giang Th\u1ecb Thanh<\/p>\n

Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Nam Trung B\u1ed9 v\u00e0 T\u00e2y Nguy\u00ean<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

B\u1ea1ch t\u00f9ng l\u00e0 m\u1ed9t lo\u00e0i c\u00e2y g\u1ed7 b\u1ea3n \u0111\u1ecba c\u00f3 k\u00edch th\u01b0\u1edbc l\u1edbn, c\u00f3 gi\u00e1 tr\u1ecb kinh t\u1ebf cao. Trong th\u1eddi gian g\u1ea7n \u0111\u00e2y, lo\u00e0i c\u00e2y n\u00e0y \u0111ang b\u1ecb khai th\u00e1c tri\u1ec7t \u0111\u1ec3, c\u00e1c qu\u1ea7n th\u1ec3 B\u1ea1ch T\u00f9ng l\u1ea1i c\u00f3 ph\u00e2n b\u1ed1 r\u1ea3i r\u00e1c. Do \u0111\u00f3, n\u1ebfu kh\u00f4ng c\u00f3 nh\u1eefng bi\u1ec7n ph\u00e1p b\u1ea3o t\u1ed3n v\u00e0 khai th\u00e1c ngu\u1ed3n gen theo h\u01b0\u1edbng b\u1ec1n v\u1eefng, lo\u00e0i c\u00e2y n\u00e0y s\u1ebd \u0111\u1ed1i m\u1eb7t v\u1edbi nguy c\u01a1 nguy c\u1ea5p trong t\u01b0\u01a1ng lai g\u1ea7n. B\u00e0i b\u00e1o n\u00e0y gi\u1edbi thi\u1ec7u k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u v\u1ec1 \u0111\u1eb7c \u0111i\u1ec3m sinh h\u1ecdc h\u1ea1t gi\u1ed1ng, \u1ea3nh h\u01b0\u1edfng c\u1ee7a n\u1ed3ng \u0111\u1ed9 GA3<\/sub> \u0111\u1ebfn kh\u1ea3 n\u0103ng n\u1ea3y m\u1ea7m c\u1ee7a h\u1ea1t c\u0169ng nh\u01b0 \u1ea3nh h\u01b0\u1edfng c\u1ee7a ph\u00e2n b\u00f3n v\u00e0 ch\u1ebf \u0111\u1ed9 che s\u00e1ng \u0111\u1ebfn sinh tr\u01b0\u1edfng c\u00e2y con giai \u0111o\u1ea1n v\u01b0\u1eddn \u01b0\u01a1m. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y, trung b\u00ecnh 1 kg h\u1ea1t c\u00f3 kho\u1ea3ng 8.811 h\u1ea1t v\u1edbi chi\u1ec1u d\u00e0i trung b\u00ecnh h\u1ea1t l\u00e0 0,65 \u00b1 0,03 cm v\u00e0 chi\u1ec1u r\u1ed9ng trung b\u00ecnh 0,54 \u00b1 0,03 cm. H\u1ea1t t\u01b0\u01a1i c\u00f3 h\u00e0m l\u01b0\u1ee3ng n\u01b0\u1edbc trung b\u00ecnh 43,14%. S\u1eed d\u1ee5ng GA3 <\/sub>\u1edf d\u1ea3i n\u1ed3ng \u0111\u1ed9 100 ppm \u0111\u1ebfn 400 ppm cho t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m cao tr\u00ean 80%, trong khi c\u00f4ng th\u1ee9c \u0111\u1ed1i ch\u1ee9ng c\u00f3 t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m l\u00e0 61,67%. Sau 10 th\u00e1ng th\u00ed nghi\u1ec7m t\u01b0\u1edbi ph\u00e2n NPK (30-10-10+TE), k\u1ebft qu\u1ea3 cho th\u1ea5y ch\u1ebf \u0111\u1ed9 t\u01b0\u1edbi ph\u00e2n ph\u00f9 h\u1ee3p l\u00e0 10 ng\u00e0y\/l\u1ea7n v\u1edbi n\u1ed3ng \u0111\u1ed9 10 g\/l cho chi\u1ec1u cao c\u00e2y trung b\u00ecnh \u0111\u1ea1t 20,95 cm v\u00e0 \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c trung b\u00ecnh l\u00e0 3,09 mm. Sau 10 th\u00e1ng theo d\u00f5i th\u00ed nghi\u1ec7m che s\u00e1ng, c\u00e2y con c\u00f3 s\u1ef1 t\u0103ng tr\u01b0\u1edfng r\u00f5 r\u1ec7t c\u1ea3 v\u1ec1 chi\u1ec1u cao c\u00e2y l\u1eabn \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c. Ch\u1ebf \u0111\u1ed9 che s\u00e1ng ph\u00f9 h\u1ee3p l\u00e0 75% tr\u01b0\u1edbc 4 th\u00e1ng v\u00e0 50% sau 4 th\u00e1ng cho t\u0103ng tr\u01b0\u1edfng chi\u1ec1u cao v\u00e0 \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c t\u1ed1t nh\u1ea5t l\u1ea7n l\u01b0\u1ee3t l\u00e0 24,79 cm v\u00e0 3,64 mm.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> B\u1ea1ch t\u00f9ng, che s\u00e1ng, ph\u00e2n b\u00f3n, n\u1ea3y m\u1ea7m<\/td>\n<\/tr>\n

\n

Research on the propagation of Dacrycarpus imbricatus <\/em>(Blume) de Laub from seeds<\/strong><\/p>\n

Dacrycarpus imbricatus <\/em>(Blume) de Laub is a valuable native tree species for timber with high economic value. The present study was conducted to evaluate the seed characteristics, exam the effect of growth regulator GA3<\/sub> on the germination of seeds, and the effect of fertilizer methods and shade ratio on the growth of seedlings at the nursery stage. The results showed that Dacrycarpus imbricatus <\/em>(Blume) de Laub seed colors are between yellow-orange and red when they are ripe. There were about 8,811 seeds per kg with an average seed length was 0.65 \u00b1 0.03 cm and the average seed width reached 0.54 \u00b1 0.03 cm. The percentage of water content in the seeds was 43.14%. Seeds were treated with GA3<\/sub> at the different concentrations range of 100 ppm to 400 ppm. The results also indicated the germination rate of the seeds was over 80% while the control is 61.67%. The suitable fertilizing NPK (30-10-10+TE) method is 10 days\/time with the concentration of 10g\/l, corresponding to an average height of seedlings being 20.95 cm and average stem diameter reaching 3.09 mm. After 10 months of follow-up in the experiment, the seedlings had significant growth in both height and root diameter. The best shading was 75% in the first 4 months and from the 4th month onwards, 50% light shading gave the best growth in height and root diameter at 24.79 cm and 3.64 mm, respectively.<\/p>\n

Keywords:<\/em><\/strong> Dacrycarpus imbricatus<\/em>, shading, fertilizer, germination<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

HI\u1ec6N TR\u1ea0NG PH\u00c2N B\u1ed0 V\u00c0 \u0110\u1eb6C \u0110I\u1ec2M L\u00c2M H\u1eccC\u00a0LO\u00c0I B\u00c1CH T\u00c1N \u0110\u00c0I LOAN (Taiwania cryptomerioides <\/em>Hayata)\u00a0T\u1ea0I KHU B\u1ea2O T\u1ed2N THI\u00caN NHI\u00caN HO\u00c0NG LI\u00caN – V\u0102N B\u00c0N, L\u00c0O CAI<\/p>\n

La \u00c1nh D\u01b0\u01a1ng2<\/sup>, Ph\u00ed H\u1ed3ng H\u1ea3i1<\/sup>, Do\u00e3n Ho\u00e0ng S\u01a1n2<\/sup>, Tr\u1ecbnh V\u0103n Hi\u1ec7u2<\/sup>, H\u00e0 Huy Nh\u1eadt2<\/sup><\/p>\n

1<\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam,
\n2<\/sup>Vi\u1ec7n Nghi\u00ean c\u1ee9u Gi\u1ed1ng v\u00e0 C\u00f4ng ngh\u1ec7 sinh h\u1ecdc L\u00e2m nghi\u1ec7p<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

C\u00e2y B\u00e1ch t\u00e1n \u0111\u00e0i loan (Taiwania cryptomerioides Hayata) thu\u1ed9c h\u1ecd Ho\u00e0ng \u0111\u00e0n (Cupressaceae) l\u00e0 lo\u00e0i c\u00e2y g\u1ed7 qu\u00fd hi\u1ebfm n\u1eb1m trong S\u00e1ch \u0110\u1ecf Vi\u1ec7t Nam (2007) \u0111\u01b0\u1ee3c x\u1ebfp v\u00e0o nh\u00f3m danh m\u1ee5c lo\u00e0i \u1edf m\u1ee9c \u0111\u1ed9 r\u1ea5t nguy c\u1ea5p (CR A1a, B1, C2b, D1) v\u00e0 trong nh\u00f3m I ph\u1ee5 l\u1ee5c IA c\u1ee7a Ngh\u1ecb \u0111\u1ecbnh 84\/2021\/N\u0110-CP. B\u00e0i b\u00e1o nh\u1eb1m m\u1ee5c \u0111\u00edch cung c\u1ea5p th\u00f4ng tin khoa h\u1ecdc v\u1ec1 hi\u1ec7n tr\u1ea1ng ph\u00e2n b\u1ed1, m\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m l\u00e2m h\u1ecdc v\u00e0 sinh th\u00e1i c\u1ee7a c\u00e2y B\u00e1ch t\u00e1n \u0111\u00e0i loan t\u1ea1i Khu b\u1ea3o t\u1ed3n thi\u00ean nhi\u00ean (BTTN) Ho\u00e0ng Li\u00ean – V\u0103n B\u00e0n, t\u1ec9nh L\u00e0o Cai. C\u00e2y B\u00e1ch t\u00e1n \u0111\u00e0i loan ph\u00e2n b\u1ed1 \u1edf nh\u1eefng v\u00f9ng r\u1eebng \u1edf khe gi\u1eefa hai s\u01b0\u1eddn n\u00fai, ven su\u1ed1i n\u01a1i c\u00f3 \u0111\u1ed9 cao t\u1eeb 1.800 – 2.100 m. M\u1eadt \u0111\u1ed9 t\u1ea7ng c\u00e2y cao c\u1ee7a l\u00e2m ph\u1ea7n dao \u0111\u1ed9ng t\u1eeb 225 – 245 c\u00e2y\/ha, \u0111\u01b0\u1eddng k\u00ednh trung b\u00ecnh c\u00f3 s\u1ef1 thay \u0111\u1ed5i kh\u00f4ng l\u1edbn t\u1eeb 26 – 30,4 cm, chi\u1ec1u cao v\u00fat ng\u1ecdn trung b\u00ecnh t\u1eeb 17,1 – 17,8 m. C\u00e2y B\u00e1ch t\u00e1n \u0111\u00e0i loan c\u00f3 m\u1eadt \u0111\u1ed9 \u0111\u1ea1t t\u1eeb 20 – 30 c\u00e2y\/ha v\u00e0 tham gia v\u00e0o c\u00f4ng th\u1ee9c t\u1ed5 th\u00e0nh t\u1ea7ng c\u00e2y t\u1ea1i c\u1ea3 3 l\u00e2m ph\u1ea7n. M\u1eadt \u0111\u1ed9 c\u00e2y t\u00e1i sinh c\u1ee7a l\u00e2m ph\u1ea7n ch\u1ec9 t\u1eeb 85 – 110 c\u00e2y\/ha. Ch\u1ea5t l\u01b0\u1ee3ng c\u00e2y t\u00e1i sinh c\u1ee7a l\u00e2m ph\u1ea7n h\u1ea7u h\u1ebft t\u1ed1t v\u1edbi t\u1ef7 l\u1ec7 cao nh\u1ea5t t\u1ea1i \u00f4 ti\u00eau chu\u1ea9n (OTC) LC02 \u0111\u1ea1t 82,4%. B\u00e1ch t\u00e1n \u0111\u00e0i loan ch\u1ee7 y\u1ebfu l\u00e0 t\u00e1i sinh h\u1ea1t, ch\u1ea5t l\u01b0\u1ee3ng c\u00e2y t\u1ed1t v\u00e0 t\u00e1i sinh ch\u1ee7 y\u1ebfu l\u00e0 \u1edf c\u1ea5p chi\u1ec1u cao nh\u1ecf h\u01a1n 0,5 m. C\u00e2y t\u00e1i sinh c\u1ee7a lo\u00e0i B\u00e1ch t\u00e1n \u0111\u00e0i loan c\u00f3 s\u1ef1 ph\u00e2n b\u1ed1 kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u t\u1ea1i c\u00e1c l\u00e2m ph\u1ea7n d\u1eabn \u0111\u1ebfn s\u1ef1 thi\u1ebfu h\u1ee5t v\u1ec1 l\u01b0\u1ee3ng c\u00e2y B\u00e1ch t\u00e1n \u0111\u00e0i loan con trong t\u1eebng khu v\u1ef1c. V\u00ec v\u1eady, c\u00e1c gi\u1ea3i ph\u00e1p b\u1ea3o t\u1ed3n v\u00e0 x\u00fac ti\u1ebfn t\u00e1i sinh c\u00e2y B\u00e1ch t\u00e1n \u0111\u00e0i loan l\u00e0 c\u1ea7n thi\u1ebft \u1edf Khu BTTN Ho\u00e0ng Li\u00ean – V\u0103n B\u00e0n.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> B\u1ea3o t\u1ed3n, Khu b\u1ea3o t\u1ed3n thi\u00ean nhi\u00ean Ho\u00e0ng Li\u00ean – V\u0103n B\u00e0n, L\u00e0o Cai, Taiwania cryptomerioides<\/em> Hayata, \u0111\u1eb7c \u0111i\u1ec3m l\u00e2m h\u1ecdc<\/td>\n<\/tr>\n

\n

The distribution status and silvicultural characteristics of Taiwania cryptomerioides Hayata in Hoang Lien – Van Ban Nature Reserve, Lao Cai province<\/strong><\/p>\n

Taiwania cryptomerioides<\/em> Hayata is a rare tree species listed in the Red Book of Vietnam (2007) with the level of CR A1a, B1, C2b, D1. This article aims to provide scientific information on the distribution status, some silvicultural and ecological features of T. cryptomerioides<\/em> in Hoang Lien – Van Ban Nature Reserve, Lao Cai province. T. cryptomerioides<\/em> is distributed in the forest areas in the crevices between two mountain slopes, along streams where the altitude is from 1,800 – 2,100 m. Through investigation of routes in Hoang Lien – Van Ban Nature Reserve, 03 OTCs have been established to record the occurrence of T. cryptomerioides<\/em> in the wild. The density of tall trees of the stand ranged from 225 trees\/ha to 245 trees\/ha, the average diameter did not change much from 26 cm to 30.4 cm, the average height of the tops was from 17.1 m to 17.8 m. The density of
\n<\/em>T. cryptomerioides<\/em> is from 20 trees\/ha to 30 trees\/ha and participates in the species composition formula in all 3 stands. The density of regenerated trees of the stand is only from 85 to 110 trees\/ha. The quality of regenerated trees of the stand is mostly good with the highest rate at LC02 reaching 82.4%. T. cryptomerioides<\/em> is mainly regenerated by seed, the tree quality is good and regeneration is mainly at the height of less than 0.5 m. The regenerated trees of T. cryptomerioides<\/em> have an uneven distribution in the stands, leading to a shortage of young cypress trees in each area. Therefore, solutions to preserve and promote the regeneration of T. cryptomerioides<\/em> are necessary in Hoang Lien – Van Ban Nature Reserve.<\/p>\n

Keywords:<\/em><\/strong> Conservation, Hoang Lien – Van Ban Nature Reserve, Lao Cai province, Taiwania cryptomerioides<\/em> Hayata, silvicultural characteristics<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

HI\u1ec6N TR\u1ea0NG PH\u00c2N B\u1ed0 V\u00c0 \u0110\u1eb6C \u0110I\u1ec2M L\u00c2M H\u1eccC\u00a0LO\u00c0I S\u1ebeN M\u1eacT (<\/strong>Madhuca pasquieri <\/em>(Dubard) H. J. Lam)\u00a0<\/strong>T\u1ea0I KHU B\u1ea2O T\u1ed2N THI\u00caN NHI\u00caN XU\u00c2N NHA, S\u01a0N LA<\/p>\n

Ph\u00ed H\u1ed3ng H\u1ea3i1<\/sup>, La \u00c1nh D\u01b0\u01a1ng2<\/sup>, Do\u00e3n Ho\u00e0ng S\u01a1n2<\/sup>
\nTr\u1ecbnh V\u0103n Hi\u1ec7u2<\/sup>, H\u00e0 Huy Nh\u1eadt2<\/sup><\/p>\n

1<\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam,
\n2<\/sup>Vi\u1ec7n Nghi\u00ean c\u1ee9u Gi\u1ed1ng v\u00e0 C\u00f4ng ngh\u1ec7 sinh h\u1ecdc L\u00e2m nghi\u1ec7p<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

C\u00e2y S\u1ebfn m\u1eadt (Madhuca pasquieri <\/em>(Dubard) H. J. Lam) thu\u1ed9c h\u1ecd H\u1ed3ng xi\u00eam (Sapotaceae), \u0111\u00e2y l\u00e0 lo\u00e0i c\u00e2y g\u1ed7 qu\u00fd hi\u1ebfm n\u1eb1m trong S\u00e1ch \u0110\u1ecf Vi\u1ec7t Nam (2007) \u0111\u01b0\u1ee3c x\u1ebfp v\u00e0o nh\u00f3m danh m\u1ee5c lo\u00e0i \u1edf m\u1ee9c \u0111\u1ed9 nguy c\u1ea5p (EN A1a, c, d). B\u00e0i b\u00e1o nh\u1eb1m m\u1ee5c \u0111\u00edch cung c\u1ea5p th\u00f4ng tin khoa h\u1ecdc v\u1ec1 hi\u1ec7n tr\u1ea1ng, m\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m l\u00e2m h\u1ecdc v\u00e0 sinh th\u00e1i c\u1ee7a c\u00e2y S\u1ebfn m\u1eadt t\u1ea1i Khu b\u1ea3o t\u1ed3n thi\u00ean nhi\u00ean (BTTN) Xu\u00e2n Nha, t\u1ec9nh S\u01a1n La. C\u00e2y S\u1ebfn m\u1eadt ph\u00e2n b\u1ed1 \u1edf nh\u1eefng v\u00f9ng c\u00f3 t\u1ea7ng \u0111\u1ea5t d\u00e0y, \u0111\u1ed9 cao \u0111\u1ebfn 1.300 m. Qua \u0111i\u1ec1u tra c\u00e1c tuy\u1ebfn t\u1ea1i Khu BTTN Xu\u00e2n Nha \u0111\u00e3 thi\u1ebft l\u1eadp \u0111\u01b0\u1ee3c 3 OTC ghi nh\u1eadn s\u1ef1 xu\u1ea5t hi\u1ec7n c\u1ee7a c\u00e2y S\u1ebfn m\u1eadt trong t\u1ef1 nhi\u00ean. M\u1eadt \u0111\u1ed9 t\u1ea7ng c\u00e2y cao c\u1ee7a l\u00e2m ph\u1ea7n dao \u0111\u1ed9ng t\u1eeb 305 – 440 c\u00e2y\/ha, \u0111\u01b0\u1eddng k\u00ednh trung b\u00ecnh c\u00f3 s\u1ef1 thay \u0111\u1ed5i kh\u00f4ng l\u1edbn t\u1eeb 27,8 – 33,1cm, chi\u1ec1u cao v\u00fat ng\u1ecdn trung b\u00ecnh t\u1eeb 18,2 – 19,1 m. C\u00e2y S\u1ebfn m\u1eadt c\u00f3 m\u1eadt \u0111\u1ed9 \u0111\u1ea1t t\u1eeb 25 – 30 c\u00e2y\/ha v\u00e0 tham gia v\u00e0o c\u00f4ng th\u1ee9c t\u1ed5 th\u00e0nh t\u1ea7ng c\u00e2y t\u1ea1i c\u1ea3 3 l\u00e2m ph\u1ea7n. M\u1eadt \u0111\u1ed9 c\u00e2y t\u00e1i sinh c\u1ee7a l\u00e2m ph\u1ea7n ch\u1ec9 t\u1eeb 160 – 205 c\u00e2y\/ha. Ch\u1ea5t l\u01b0\u1ee3ng c\u00e2y t\u00e1i sinh c\u1ee7a l\u00e2m ph\u1ea7n h\u1ea7u h\u1ebft t\u1ed1t v\u1edbi t\u1ef7 l\u1ec7 cao nh\u1ea5t t\u1ea1i \u00f4 ti\u00eau chu\u1ea9n (OTC) SL 01 v\u1edbi 68,6%. S\u1ebfn m\u1eadt ch\u1ee7 y\u1ebfu l\u00e0 t\u00e1i sinh h\u1ea1t, ch\u1ea5t l\u01b0\u1ee3ng c\u00e2y t\u1ed1t v\u00e0 t\u00e1i sinh ch\u1ee7 y\u1ebfu l\u00e0 \u1edf c\u1ea5p chi\u1ec1u cao nh\u1ecf h\u01a1n 0,5 m. Do c\u00e2y S\u1ebfn m\u1eadt t\u00e1i sinh t\u1ea1i S\u01a1n La c\u00f3 m\u1eadt \u0111\u1ed9 th\u1ea5p n\u00ean d\u1eabn \u0111\u1ebfn nguy c\u01a1 suy gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng c\u00e2y S\u1ebfn m\u1eadt tr\u01b0\u1edfng th\u00e0nh trong t\u01b0\u01a1ng lai. V\u00ec v\u1eady, c\u00e1c gi\u1ea3i ph\u00e1p b\u1ea3o t\u1ed3n v\u00e0 x\u00fac ti\u1ebfn t\u00e1i sinh c\u00e2y S\u1ebfn m\u1eadt l\u00e0 c\u1ea7n thi\u1ebft \u1edf Khu BTTN Xu\u00e2n Nha.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> B\u1ea3o t\u1ed3n, Khu b\u1ea3o t\u1ed3n thi\u00ean nhi\u00ean Xu\u00e2n Nha, S\u01a1n La, Madhuca pasquieri<\/em> (Dubard) H. J. Lam, \u0111\u1eb7c \u0111i\u1ec3m l\u00e2m h\u1ecdc<\/td>\n<\/tr>\n

\n

The distribution status and silvicultural characteristics<\/strong> of Madhuca pasquieri<\/em> (Dubard) H. J. Lam in Xuan Nha Nature Reserve, Son La province<\/strong><\/p>\n

Madhuca pasquieri<\/em> (Dubard) H. J. Lam belongs to Sapotaceae family, this is a rare tree species listed in the Red Book of Vietnam (2007) with the level of EN A1a, c, d. The article aims to provide scientific information on the status, some silvicultural and ecological features of
\nM. pasquieri<\/em> in Xuan Nha Nature Reserve, Son La province. M. pasquieri<\/em> is distributed in areas with thick soil layer, altitude up to 1,300 m. Through investigation of routes in Xuan Nha Nature Reserve. 3 OTCs have been established to record the occurrence of M. pasquieri<\/em> in nature. The density of tall trees of the stand ranged from 305 trees\/ha to 440 trees\/ha, the average diameter did not change much from 27.8 cm to 33.1 cm, the average height of the tops was from 18.2 m to 19.1 m. M. pasquieri<\/em> has a density of 25 trees\/ha to 30 trees\/ha and participates in the species composition formula in all 3 stands. The density of regenerated trees of the stand is only from 160 to 205 trees\/ha. The quality of regenerated trees of the stand is mostly good with the highest rate at SL 01 with 68.6%. M. pasquieri<\/em> is mainly regenerated by seeds, has good quality, and regenerates mainly at the height of less than 0.5 m. Due to the low density of regenerating M. pasquieri<\/em> in Son La, it leads to the risk of reducing the number of mature M. pasquieri<\/em> in the future. Therefore, solutions to preserve and promote the regeneration of M. pasquieri<\/em> are necessary in Xuan Nha Nature Reserve.<\/p>\n

Keywords:<\/em><\/strong> Conservation, Xuan Nha Nature Reserve, Son La province, Madhuca pasquieri <\/em>(Dubard) H. J. Lam, silvicultural characteristics<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

NGHI\u00caN C\u1ee8U M\u1ed8T S\u1ed0 \u0110\u1eb6C \u0110I\u1ec2M L\u00c2M H\u1eccC\u00a0C\u1ee6A LO\u00c0I T\u00d4 H\u1ea0P \u0110I\u1ec6N BI\u00caN (Altingia siamensis<\/em> Craib)\u00a0T\u1ea0I BAN QU\u1ea2N L\u00dd DI T\u00cdCH L\u1ecaCH S\u1eec V\u00c0 C\u1ea2NH QUAN M\u00d4I TR\u01af\u1edcNG M\u01af\u1edcNG PH\u0102NG, T\u1ec8NH \u0110I\u1ec6N BI\u1ec6N<\/p>\n

Nguy\u1ec5n V\u0103n H\u00f9ng1<\/sup>, V\u00f5 \u0110\u1ea1i H\u1ea3i2<\/sup>, Nguy\u1ec5n Th\u1ecb H\u01b0\u01a1ng Ly1<\/sup>,
\nNguy\u1ec5n H\u1ed3ng H\u1ea3i3<\/sup>, V\u0169 V\u0103n Tu\u00e2n1<\/sup>, <\/sub><\/p>\n

1 <\/sup>Trung t\u00e2m Khoa h\u1ecdc L\u00e2m nghi\u1ec7p T\u00e2y B\u1eafc, Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n2<\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n3<\/sup>Khoa L\u00e2m h\u1ecdc, Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u m\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m l\u00e2m h\u1ecdc c\u1ee7a lo\u00e0i T\u00f4 h\u1ea1p \u0111i\u1ec7n bi\u00ean t\u1ea1i khu r\u1eebng thu\u1ed9c Ban qu\u1ea3n l\u00fd r\u1eebng di t\u00edch l\u1ecbch s\u1eed v\u00e0 c\u1ea3nh quan m\u00f4i tr\u01b0\u1eddng M\u01b0\u1eddng Ph\u0103ng, t\u1ec9nh \u0110i\u1ec7n Bi\u00ean \u0111\u00e3 cho th\u1ea5y: (i) T\u00f4 h\u1ea1p \u0111i\u1ec7n bi\u00ean ph\u00e2n b\u1ed1 t\u1ef1 nhi\u00ean \u1edf n\u01a1i \u0111\u1ea5t \u1ea9m, ven h\u1ed3 x\u00e3 P\u00e1 Khoang, t\u1eadp trung \u1edf \u0111\u1ed9 cao t\u1eeb 900 m \u0111\u1ebfn d\u01b0\u1edbi 1.000 m so v\u1edbi m\u1ef1c n\u01b0\u1edbc bi\u1ec3n, \u0111\u1ed9 d\u1ed1c t\u1eeb 15o<\/sup> – 19o<\/sup>. (ii) T\u00f4 h\u1ea1p \u0111i\u1ec7n bi\u00ean chi\u1ebfm \u01b0u th\u1ebf trong c\u00e1c tr\u1ea1ng th\u00e1i r\u1eebng v\u1edbi h\u1ec7 s\u1ed1 IV% dao \u0111\u1ed9ng t\u1eeb 8,7 – 16,8%. T\u00f4 h\u1ea1p \u0111i\u1ec7n bi\u00ean xu\u1ea5t hi\u1ec7n \u1edf c\u1ea3 3 t\u1ea7ng t\u00e1n v\u1edbi s\u1ed1 l\u01b0\u1ee3ng \u00edt v\u00e0 ph\u1ea7n l\u1edbn c\u00e1c c\u00e2y t\u1eadp trung \u1edf t\u1ea7ng t\u00e1n ch\u00ednh. Trong r\u1eebng t\u1ef1 nhi\u00ean th\u01b0\u1eddng b\u1eaft g\u1eb7p T\u00f4 h\u1ea1p \u0111i\u1ec7n bi\u00ean c\u00f9ng c\u00e1c lo\u00e0i D\u1ebb m\u0169i m\u00e1c, Ch\u1eb9o t\u00eda, D\u1ebb gai l\u00e1 b\u1ea1c. (iii) T\u1ed5 th\u00e0nh lo\u00e0i c\u00e2y t\u00e1i sinh trong khu v\u1ef1c nghi\u00ean c\u1ee9u \u0111a d\u1ea1ng v\u1edbi 15 -16 lo\u00e0i. M\u1eadt \u0111\u1ed9 c\u00e2y T\u00f4 h\u1ea1p \u0111i\u1ec7n bi\u00ean t\u00e1i sinh dao \u0111\u1ed9ng t\u1eeb 720 – 1.120 c\u00e2y\/ha. \u0110a s\u1ed1 c\u00e2y T\u00f4 h\u1ea1p \u0111i\u1ec7n bi\u00ean c\u00f3 ch\u1ea5t l\u01b0\u1ee3ng t\u00e1i sinh t\u1ed1t, s\u1ed1 l\u01b0\u1ee3ng c\u00e2y c\u00f3 ngu\u1ed3n g\u1ed1c t\u1eeb h\u1ea1t dao \u0111\u1ed9ng t\u1eeb 14,9 – 15,5% so v\u1edbi l\u00e2m ph\u1ea7n. C\u00e2y t\u00e1i sinh t\u1eadp trung nhi\u1ec1u nh\u1ea5t \u1edf c\u1ea5p chi\u1ec1u cao II (0,5 – 1 m) v\u00e0 c\u1ea5p chi\u1ec1u cao III (1 – 2 m). S\u1ed1 c\u00e2y t\u00e1i sinh c\u00f3 tri\u1ec3n v\u1ecdng bi\u1ebfn thi\u00ean t\u1eeb 1.227 – 1.253 c\u00e2y\/ha. (iv) T\u00ednh \u0111a d\u1ea1ng lo\u00e0i \u1edf tr\u1ea1ng th\u00e1i r\u1eebng ngh\u00e8o cao h\u01a1n tr\u1ea1ng th\u00e1i r\u1eebng trung b\u00ecnh.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> \u0110\u1eb7c \u0111i\u1ec3m l\u00e2m h\u1ecdc, M\u01b0\u1eddng Ph\u0103ng, T\u00f4 h\u1ea1p \u0111i\u1ec7n bi\u00ean<\/td>\n<\/tr>\n

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Silvicultural characteristics of Altingia Siamensis<\/em> Craib in the forest of the Forest Management Board of Historical Relics and Environmental Landscapes of Muong Phang, Dien Bien province<\/strong><\/p>\n

The results of research on some silvicultural characteristics of Altingia siamensis<\/em> Craib in the forest of the Forest Management Board of Historical Relics and Environmental Landscapes of Muong Phang, Dien Bien province have shown that: (i) A. siamensis<\/em> is naturally distributed in humid soil, near the lake in Pa Khoang commune, with canopy cover from 65 – 80%, concentrated from altitude of 900 to 1,000 m above sea level, the slope is from 15o<\/sup> to 19o<\/sup>. (ii) Dominates in the poor and medium forest statuses with the IV% coefficient ranging from 8.7 to 16.8%. A. siamensis<\/em> is recognized all 3 canopy A1, A2, A3 with a small number and the majority of trees and record many in the main canopy. Some associated species with A. siamensis<\/em> included: Castanopsis tesselata<\/em> Hickel & A. Camus, Engelhardtia chrysolepis<\/em> Hance and Castanopsis fabri<\/em> Hance, J. Bot. The majority of regenerated tree species included Altingia siamensis<\/em> Craib, Castanopsis tesselata<\/em> Hickel & A. Camus, Engelhardtia chrysolepis<\/em> Hance, Castanopsis fabri<\/em> Hance, J. Bot, Tetradium ruticarpum<\/em> (A. Jussieu) T. G. Hartley. (iii) The species composition of regenerative trees in the study area is diverse with 15 -16 species. Density of regenerated A. siamensis<\/em> varies from 720 to 1120 trees\/ha. Most of A. siamensis<\/em> trees have good regenerative quality, the number of trees derived from seeds ranges from 14.9 to 15.5%. Regenerating trees concentrated most at height level II (0.5 – 1 m) and height level III (1 – 2 m). The number of promising regenerated trees varies from 1.227 to 1.253 trees\/ha. (iv) Species diversity is higher in the poor forest state than in the average forest state.<\/p>\n

Keywords:<\/em><\/strong> Silvicultural characteristics, Muong Phang, Altingia siamensis<\/em> Craib<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

NGHI\u00caN C\u1ee8U C\u1ea4U TR\u00daC R\u1eeaNG H\u1ed6N GIAO L\u00c1 R\u1ed8NG – L\u00c1 KIM\u00a0T\u1ea0I V\u01af\u1edcN QU\u1ed0C GIA BIDOUP – N\u00daI B\u00c0, T\u1ec8NH L\u00c2M \u0110\u1ed2NG<\/p>\n

\u0110\u1ed7 Th\u1ecb H\u1ed3ng H\u00f2a1<\/sup>, \u0110\u1eb7ng Minh Tr\u00ed2<\/sup>, Nguy\u1ec5n Qu\u1ed1c \u0110\u1ea1t2<\/sup>, Nguy\u1ec5n L\u00ea Xu\u00e2n B\u00e1ch2<\/sup>,
\nPhan Minh S\u00e1ng2<\/sup>, Nguy\u1ec5n Th\u1ebf V\u0103n2<\/sup>, Nguy\u1ec5n Th\u00e0nh L\u1ef1c2<\/sup>, L\u00ea B\u1eedu Th\u1ea1ch2<\/sup>,
\nL\u00ea V\u0103n H\u01b0\u01a1ng3<\/sup>, L\u00ea V\u0103n S\u01a1n3<\/sup>, V\u0169 Ng\u1ecdc Long2<\/sup>, L\u01b0u H\u1ed3ng Tr\u01b0\u1eddng2<\/sup><\/p>\n

1<\/sup> H\u1ecdc vi\u1ec7n Khoa h\u1ecdc v\u00e0 C\u00f4ng ngh\u1ec7, Vi\u1ec7n H\u00e0n l\u00e2m Khoa h\u1ecdc v\u00e0 C\u00f4ng ngh\u1ec7 Vi\u1ec7t Nam
\n<\/strong>2<\/sup> Vi\u1ec7n Sinh th\u00e1i h\u1ecdc mi\u1ec1n Nam, Vi\u1ec7n H\u00e0n l\u00e2m Khoa h\u1ecdc v\u00e0 C\u00f4ng ngh\u1ec7 Vi\u1ec7t Nam
\n3<\/sup> V\u01b0\u1eddn Qu\u1ed1c gia Bidoup – N\u00fai B\u00e0, t\u1ec9nh L\u00e2m \u0110\u1ed3ng<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Vi\u1ec7t Nam l\u00e0 m\u1ed9t trong nh\u1eefng n\u01b0\u1edbc thu\u1ed9c \u0110i\u1ec3m n\u00f3ng \u0111a d\u1ea1ng sinh h\u1ecdc Indo-Burma, \u0111\u1ee9ng v\u1ecb tr\u00ed th\u1ee9 16 trong nh\u1eefng n\u01b0\u1edbc \u0111a d\u1ea1ng sinh h\u1ecdc cao nh\u1ea5t th\u1ebf gi\u1edbi nh\u01b0ng c\u0169ng ch\u1ecbu \u1ea3nh h\u01b0\u1edfng l\u1edbn c\u1ee7a s\u1ef1 bi\u1ebfn \u0111\u1ed5i kh\u00ed h\u1eadu. B\u1ea3o t\u1ed3n r\u1eebng t\u1ef1 nhi\u00ean l\u00e0 ho\u1ea1t \u0111\u1ed9ng quan tr\u1ecdng trong chi\u1ebfn l\u01b0\u1ee3c gi\u1ea3m thi\u1ec3u t\u00e1c \u0111\u1ed9ng bi\u1ebfn \u0111\u1ed5i kh\u00ed h\u1eadu to\u00e0n c\u1ea7u. Nghi\u00ean c\u1ee9u c\u1ea5u tr\u00fac r\u1eebng h\u1ed7n giao l\u00e1 r\u1ed9ng – l\u00e1 kim t\u1ea1i V\u01b0\u1eddn Qu\u1ed1c gia Bidoup – N\u00fai B\u00e0 c\u00f3 \u00fd ngh\u0129a quan tr\u1ecdng trong vi\u1ec7c th\u1ef1c hi\u1ec7n th\u00e0nh c\u00f4ng c\u00e1c k\u1ebf ho\u1ea1ch REDD+<\/sup>. Nghi\u00ean c\u1ee9u n\u00e0y s\u1eed d\u1ee5ng ph\u1ea7n m\u1ec1m ph\u00e2n t\u00edch th\u1ed1ng k\u00ea R ph\u00e2n t\u00edch \u0111a d\u1ea1ng th\u00e0nh ph\u1ea7n h\u1ecd v\u00e0 ph\u1ea7n m\u1ec1m SPSS \u0111\u1ec3 m\u00f4 ph\u1ecfng quy lu\u1eadt ph\u00e2n b\u1ed1 s\u1ed1 c\u00e2y theo \u0111\u01b0\u1eddng k\u00ednh theo h\u00e0m Weibull, h\u00e0m Meyer v\u00e0 h\u00e0m Kho\u1ea3ng c\u00e1ch. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u h\u1ecd \u01b0u th\u1ebf t\u1ea1i \u00f4 \u0111\u1ecbnh v\u1ecb l\u00e0 h\u1ecd Fagaceae (D\u1ebb), ph\u00e2n b\u1ed1 t\u1ea7n su\u1ea5t c\u00e2y theo c\u1ea5p k\u00ednh c\u00f3 d\u1ea1ng \u0111\u01b0\u1eddng cong h\u00ecnh J ng\u01b0\u1ee3c. Nghi\u00ean c\u1ee9u c\u0169ng m\u00f4 ph\u1ecfng \u0111\u01b0\u1ee3c quy lu\u1eadt ph\u00e2n b\u1ed1 s\u1ed1 c\u00e2y theo \u0111\u01b0\u1eddng k\u00ednh (N\/D1,3<\/sub>) theo h\u00e0m Weibull v\u00e0 h\u00e0m Kho\u1ea3ng c\u00e1ch ph\u00f9 h\u1ee3p v\u1edbi k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u c\u1ee7a m\u1ed9t s\u1ed1 t\u00e1c gi\u1ea3 \u0111\u1ed1i v\u1edbi r\u1eebng t\u1ef1 nhi\u00ean. Nh\u01b0 v\u1eady, th\u00f4ng qua \u00f4 \u0111\u1ecbnh v\u1ecb nghi\u00ean c\u1ee9u sinh th\u00e1i l\u00e2u d\u00e0i \u0111\u00e3 \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp, nghi\u00ean c\u1ee9u n\u00e0y cung c\u1ea5p th\u00f4ng tin h\u1eefu \u00edch v\u1ec1 \u0111a d\u1ea1ng th\u00e0nh ph\u1ea7n h\u1ecd v\u00e0 c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m li\u00ean quan \u0111\u1ebfn c\u1ea5u tr\u00fac r\u1eebng nh\u1eb1m \u0111\u00f3ng g\u00f3p v\u00e0o c\u00f4ng t\u00e1c qu\u1ea3n l\u00fd v\u00e0 b\u1ea3o t\u1ed3n r\u1eebng t\u1ea1i V\u01b0\u1eddn Qu\u1ed1c gia Bidoup – N\u00fai B\u00e0 m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Bidoup – N\u00fai B\u00e0, c\u1ea5u tr\u00fac r\u1eebng, r\u1eebng h\u1ed7n giao<\/td>\n<\/tr>\n

\n

Study on the structure of the mixed broadleaf and coniferous forest in Bidoup – Nui Ba National Park, Lam Dong province<\/strong><\/p>\n

Vietnam is one of the countries in the Indo-Burma Biodiversity Hotspot, ranked 16th<\/sup> among the countries with the highest biodiversity in the world, but is also heavily affected by climate change. Conservation of natural forests is an important part of the global climate change mitigation strategy. Study on the structure of the mixed bradleaf and coniferous in Bidoup – Nui Ba National Park is important in the successful implementation of REDD+. This study uses statistical analysis software R to analyze family diversity and SPSS software to simulate the distribution of tree numbers by diameter according to Weibull function, Meyer function and Distance function. The results of the study on the dominant family in the location plot are the Fagaceae family, the tree frequency distribution by diameter class has the form of an inverted J-shaped curve. The study also simulates the distribution of tree numbers by diameter (N\/D1.3<\/sub>) according to the Weibull function and the Distance function, which is consistent with the research results of some forestry scientists for natural forests. Thus, through permanent plot, this study provides useful information on the diversity of the family composition and the characteristics related to the forest structure in order to contribute effectively in forest management and conservation of Bidoup – Nui Ba National Park.<\/p>\n

Keywords:<\/em><\/strong> Bidoup – Nui Ba, forest structure, mixed forest<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u00a0<\/strong><\/p>\n

C\u01a0 CH\u1ebe DUY TR\u00cc \u0110A D\u1ea0NG LO\u00c0I C\u00c2Y G\u1ed6 TRONG <\/strong>R\u1eeaNG L\u00c1 R\u1ed8NG TH\u01af\u1edcNG XANH \u1ede KHU V\u1ef0C IA M\u01a0R, T\u1ec8NH GIA LAI<\/strong><\/p>\n

Nguy\u1ec5n V\u0103n Qu\u00fd1<\/sup>, B\u00f9i M\u1ea1nh H\u01b0ng2<\/sup>, Nguy\u1ec5n H\u1eefu Th\u1ebf3<\/sup>,
\nNguy\u1ec5n V\u0103n H\u1ee3p1<\/sup>, Nguy\u1ec5n Thanh Tu\u1ea5n1<\/sup><\/p>\n

1<\/sup>Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p – Ph\u00e2n hi\u1ec7u \u0110\u1ed3ng Nai
\n2 Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p
\n3<\/sup>Ph\u00e2n vi\u1ec7n \u0110i\u1ec1u tra, Quy ho\u1ea1ch r\u1eebng Nam Trung B\u1ed9 v\u00e0 T\u00e2y Nguy\u00ean<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

T\u00ecm hi\u1ec3u c\u00e1c c\u01a1 ch\u1ebf duy tr\u00ec \u0111a d\u1ea1ng sinh h\u1ecdc c\u1ee7a c\u00e1c khu r\u1eebng nhi\u1ec7t \u0111\u1edbi l\u00e0 m\u1ed9t trong nh\u1eefng tr\u1ecdng t\u00e2m c\u1ee7a nghi\u00ean c\u1ee9u sinh th\u00e1i qu\u1ea7n x\u00e3. B\u00e0i b\u00e1o n\u00e0y c\u00f4ng b\u1ed1 k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u m\u1ed1i quan h\u1ec7 gi\u1eefa lo\u00e0i v\u00e0 di\u1ec7n t\u00edch (ISAR) c\u1ee7a c\u00e1c lo\u00e0i c\u00e2y g\u1ed7 trong r\u1eebng l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh \u1edf khu v\u1ef1c Ia M\u01a1r, t\u1ec9nh Gia Lai. D\u1eef li\u1ec7u nghi\u00ean c\u1ee9u \u0111\u01b0\u1ee3c thu th\u1eadp t\u1eeb t\u1ea5t c\u1ea3 c\u00e1c c\u00e2y c\u00f3 \u0111\u01b0\u1eddng k\u00ednh ngang ng\u1ef1c (dbh) \u2265 2,5 cm trong \u00f4 ti\u00eau chu\u1ea9n \u0111i\u1ec3n h\u00ecnh t\u1ea1m th\u1eddi (OTC) 2 ha (100 \u00d7 200 m). C\u00e1c m\u00f4 h\u00ecnh ISAR \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng th\u00f4ng qua Package \u2018idar\u2019 tr\u00ean ph\u1ea7n m\u1ec1m R phi\u00ean b\u1ea3n 4.1.1 \u0111\u1ec3 ph\u00e2n t\u00edch \u1ea3nh h\u01b0\u1edfng c\u1ee7a m\u1ed9t lo\u00e0i \u0111\u1ed1i v\u1edbi c\u1ea5u tr\u00fac \u0111a d\u1ea1ng lo\u00e0i c\u1ee7a qu\u1ea7n x\u00e3. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u ch\u1ec9 ra r\u1eb1ng, m\u1eadt \u0111\u1ed9 v\u00e0 k\u00edch th\u01b0\u1edbc c\u00e1 th\u1ec3 c\u1ee7a m\u1ed9t lo\u00e0i c\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ed1i v\u1edbi c\u1ea5u tr\u00fac \u0111a d\u1ea1ng lo\u00e0i l\u00e2n c\u1eadn. Trong c\u00e1c giai \u0111o\u1ea1n s\u1ed1ng, c\u00e2y non c\u00f3 \u1ea3nh h\u01b0\u1edfng th\u00fac \u0111\u1ea9y \u0111a d\u1ea1ng lo\u00e0i l\u00e2n c\u1eadn nhi\u1ec1u h\u01a1n so v\u1edbi c\u00e2y s\u00e0o v\u00e0 c\u00e2y th\u00e0nh th\u1ee5c. C\u00e1c lo\u00e0i trung l\u1eadp chi\u1ebfm \u01b0u th\u1ebf v\u1ec1 s\u1ed1 l\u01b0\u1ee3ng so v\u1edbi c\u00e1c lo\u00e0i th\u00fac \u0111\u1ea9y v\u00e0 k\u00ecm h\u00e3m \u0111a d\u1ea1ng, chi\u1ebfm 61 – 94% t\u1ed5ng s\u1ed1 lo\u00e0i \u0111\u01b0\u1ee3c ph\u00e2n t\u00edch. T\u1eeb nh\u1eefng k\u1ebft qu\u1ea3 \u0111\u00e3 thu \u0111\u01b0\u1ee3c, nghi\u00ean c\u1ee9u n\u00e0y \u0111\u00e3 ph\u00e1t hi\u1ec7n s\u1ef1 c\u1ea1nh tranh b\u1ea5t \u0111\u1ed1i x\u1ee9ng c\u1ee7a c\u00e2y r\u1eebng \u1edf c\u00e1c giai \u0111o\u1ea1n s\u1ed1ng kh\u00e1c nhau v\u00e0 s\u1ef1 chi\u1ebfm \u01b0u th\u1ebf c\u1ee7a c\u00e1c lo\u00e0i trung l\u1eadp trong qu\u1ea7n x\u00e3 r\u1eebng l\u00e0 c\u00e1c qu\u00e1 tr\u00ecnh \u0111\u00e3 \u0111i\u1ec1u ch\u1ec9nh c\u1ea5u tr\u00fac \u0111a d\u1ea1ng lo\u00e0i c\u00e2y g\u1ed7 trong qu\u1ea7n x\u00e3 th\u1ef1c v\u1eadt \u1edf khu v\u1ef1c nghi\u00ean c\u1ee9u.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> C\u1ea5u tr\u00fac \u0111a d\u1ea1ng, c\u01a1 ch\u1ebf c\u00f9ng t\u1ed3n t\u1ea1i, lo\u00e0i l\u00e2n c\u1eadn, m\u00f4 h\u00ecnh ISAR, th\u1ef1c v\u1eadt th\u00e2n g\u1ed7<\/td>\n<\/tr>\n

\n

Diversity maintenance mechanism of woody plant in an Ia Mor evergreen broadleaved forest, Gia Lai province<\/strong><\/p>\n

Understanding the underlying mechanisms that maintain the biodiversity of tropical forests is one of the primary focuses in community ecology. This article presented research results on the individual species-area relationship (ISAR) of woody species in the evergreen broadleaved forest at an Ia Mor area of Gia Lai province. Research data were collected from all individual trees with a diameter at breast height (dbh) \u2265 2.5 cm in a 2 ha-study plot (100 \u00d7 200 m). The ISAR models were built to analyze the influence of one species on the neighboring species diversity by using R version 4.1.1 software. Research results showed that the density and individual size of one species affect the individual species structure of the plant community. During the life-history stages, the juvenile trees influence more than the subadult and adult trees in promoting neighboring species diversity. Neutral species were numerically dominant against diversity accumulators and diversity repellers, accounting for 61 to 94 percent of the total number of species analyzed. From the obtained results, this study showed that asymmetric competition among individual trees of different life-history stages and the predominance of neutral species were two underlying processes that adjusted the individual species structure in the Ia Mor evergreen broadleaved forest.<\/p>\n

Keywords:<\/em><\/strong> Diversity structure, coexistence mechanisms, neighboring species, ISAR model, woody plant<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u00a0<\/strong><\/p>\n

\u0110\u00c1NH GI\u00c1 S\u1ef0 PH\u00d9 H\u1ee2P SINH TH\u00c1I V\u00c0 \u0110\u1ec0 XU\u1ea4T\u00a0QUY HO\u1ea0CH PH\u00c1T TRI\u1ec2N C\u00c2Y HU\u1ef6NH (Tarrietia<\/em> javanica<\/em> Blume)\u00a0T\u1ea0I T\u1ec8NH QU\u1ea2NG B\u00ccNH<\/p>\n

V\u0169 \u0110\u1ee9c B\u00ecnh1<\/sup>, Nguy\u1ec5n V\u0103n L\u1ee3i2<\/sup>, Nguy\u1ec5n Th\u1ecb Th\u1ea3o Trang1,2<\/sup>, Nguy\u1ec5n Th\u1ecb Thanh Nga1<\/sup><\/p>\n

1<\/sup>Trung t\u00e2m Khoa h\u1ecdc L\u00e2m nghi\u1ec7p B\u1eafc Trung B\u1ed9
\n2<\/sup>Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc N\u00f4ng L\u00e2m, \u0110\u1ea1i h\u1ecdc Hu\u1ebf<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Nghi\u00ean c\u1ee9u n\u00e0y x\u00e1c \u0111\u1ecbnh v\u00f9ng \u0111\u1ea5t ph\u00f9 h\u1ee3p cho lo\u00e0i c\u00e2y Hu\u1ef7nh (Tarrietia<\/em> javanica <\/em>Blume) nh\u1eb1m cung c\u1ea5p c\u01a1 s\u1edf khoa h\u1ecdc cho vi\u1ec7c quy ho\u1ea1ch ph\u00e1t tri\u1ec3n b\u1ec1n v\u1eefng lo\u00e0i c\u00e2y n\u00e0y t\u1ea1i t\u1ec9nh Qu\u1ea3ng B\u00ecnh. M\u1ee5c ti\u00eau c\u1ee7a nghi\u00ean c\u1ee9u l\u00e0 t\u00edch h\u1ee3p c\u00e1c l\u1edbp nh\u00e2n t\u1ed1 sinh th\u00e1i \u1ea3nh h\u01b0\u1edfng th\u00f4ng qua m\u00f4 h\u00ecnh ph\u1ed1i h\u1ee3p tuy\u1ebfn t\u00ednh c\u00f3 tr\u1ecdng s\u1ed1 trong GIS \u0111\u1ec3 thi\u1ebft l\u1eadp b\u1ea3n \u0111\u1ed3 ph\u00f9 h\u1ee3p cho lo\u00e0i c\u00e2y Hu\u1ef7nh \u1edf t\u1ec9nh Qu\u1ea3ng B\u00ecnh. Nghi\u00ean c\u1ee9u \u0111\u00e3 s\u1eed d\u1ee5ng ti\u1ebfn tr\u00ecnh ph\u00e2n t\u00edch th\u1ee9 b\u1eadc m\u1edd FAHP (Fuzzy<\/em> Analytic Hierarchy Process<\/em>) \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh tr\u1ecdng s\u1ed1 c\u1ee7a c\u00e1c nh\u00e2n t\u1ed1 sinh th\u00e1i c\u00f9ng v\u1edbi k\u1ebft qu\u1ea3 ph\u00e2n lo\u1ea1i t\u01b0 li\u1ec7u \u1ea3nh v\u1ec7 tinh Landsat 8 OLI ch\u1ee5p th\u00e1ng 2 n\u0103m 2021 v\u00e0 s\u1ed1 li\u1ec7u \u0111i\u1ec1u tra tr\u00ean th\u1ef1c \u0111\u1ecba. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y, di\u1ec7n t\u00edch \u0111\u1ea5t \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 ph\u00f9 h\u1ee3p cho lo\u00e0i c\u00e2y Hu\u1ef7nh l\u00e0 134.690,3 ha (chi\u1ebfm 16,7% t\u1ed5ng di\u1ec7n t\u00edch t\u1ef1 nhi\u00ean). Di\u1ec7n t\u00edch \u0111\u1ec1 xu\u1ea5t quy ho\u1ea1ch ti\u1ec1m n\u0103ng ph\u1ee5c h\u1ed3i lo\u00e0i c\u00e2y Hu\u1ef7nh t\u1ea1i Qu\u1ea3ng B\u00ecnh theo m\u1ee9c \u0111\u1ed9 \u01b0u ti\u00ean 1 (ti\u1ebfp c\u1eadn m\u1ea1ng l\u01b0\u1edbi \u0111\u01b0\u1eddng \u2264 2.000 m) l\u00e0 58.955,1 ha (chi\u1ebfm 7,31%); m\u1ee9c \u0111\u1ed9 \u01b0u ti\u00ean 2 (ti\u1ebfp c\u1eadn m\u1ea1ng l\u01b0\u1edbi \u0111\u01b0\u1eddng t\u1eeb > 2.000 m \u0111\u1ebfn 4.000 m) l\u00e0 47.352 ha (chi\u1ebfm 5,87%) v\u00e0 m\u1ee9c \u0111\u1ed9 \u01b0u ti\u00ean 3 (ti\u1ebfp c\u1eadn m\u1ea1ng l\u01b0\u1edbi \u0111\u01b0\u1eddng t\u1eeb > 4.000 m \u0111\u1ebfn 6.000 m) l\u00e0 28.383,2 ha (chi\u1ebfm 3,52%).<\/p>\n

T\u1eeb kh\u00f3a:<\/em> <\/strong>Ti\u1ebfn tr\u00ecnh ph\u00e2n t\u00edch th\u1ee9 b\u1eadc m\u1edd (FAHP), GIS, Hu\u1ef7nh<\/td>\n<\/tr>\n

\n

Assessing ecological suitability and proposing planning solutions for development of Tarri<\/em>etia javanica<\/em> Blume in Quang Binh province<\/strong><\/p>\n

The study is aimed to identification of land suitabilty for Tarrietia<\/em> javanica <\/em>to provide a scientific basis for the sustainable development of this species in Quang Binh province. The objective of the study was to integrate the influenced ecological factors by applying the weighted linear combination (WLC) model in GIS to establish a land suitability map for Ta<\/em>rrietia<\/em> javanica <\/em>in Quang Binh province. The study determined the weights of ecological factors by using the Fuzzy Analytic Hierarchy Process (FAHP) combined with the classification of the Landsat 8 OLI images taken in February 2021, and field survey data. The results showed that the land suitabilty area of Tarrietia<\/em> javanica <\/em>is 134,690.3 ha (accounted for 16.7% of the total natural area); The potential area for restoration of Tarrietia javanica<\/em> in Quang Binh according to priority levels: lever 1 (accessibility to road network \u2264 2,000 m) level 2 (accessibility to road network from > 2,000 m to 4,000 m), and level 3 (accessibility to road network from > 4,000 m to 6,000m) was 58,955.1 ha (accounted for 7.31%); 47,352 ha (accounted for 5.87%) and 28,383.2 ha (accounted for 3.52%), respectively.<\/p>\n

Keywords: <\/strong>FAHP, GIS, Tarrietia javanica<\/em><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n


\n<\/strong> \u0110\u00c1NH GI\u00c1 SINH TR\u01af\u1edeNG M\u1ed8T S\u1ed0 M\u00d4 H\u00ccNH TR\u1ed2NG C\u00c2Y B\u1ea2N \u0110\u1ecaA D\u01af\u1edaI T\u00c1N R\u1eeaNG T\u1ea0I S\u00d3C S\u01a0N, H\u00c0 N\u1ed8I<\/p>\n

Ph\u1ea1m Ng\u1ecdc Th\u00e0nh, T\u1ea1 V\u0103n H\u00e2n, Nguy\u1ec5n Xu\u00e2n \u0110\u00e0i, Tr\u01b0\u01a1ng Quang Tr\u00ed,
\nH\u00e0 \u0110\u00ecnh Long, H\u00e0 V\u0103n N\u0103m<\/p>\n

Vi\u1ec7n Nghi\u00ean c\u1ee9u Sinh th\u00e1i v\u00e0 M\u00f4i tr\u01b0\u1eddng r\u1eebng<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

C\u00e1c m\u00f4 h\u00ecnh tr\u1ed3ng c\u00e2y b\u1ea3n \u0111\u1ecba 4 lo\u00e0i Re g\u1eebng (Cinnamomum parthenoxylon<\/em>), Lim xanh (Erythrophleum fordii<\/em>), Sao \u0111en (Hopea odorata<\/em>), Chi\u00eau li\u00eau Terminalia<\/em> nigrovenulosa<\/em>) d\u01b0\u1edbi t\u00e1n c\u00e1c lo\u1ea1i r\u1eebng th\u00f4ng, keo v\u00e0 th\u00f4ng xen keo t\u1ea1i S\u00f3c S\u01a1n – H\u00e0 N\u1ed9i cho t\u1ef7 l\u1ec7 s\u1ed1ng t\u1eeb m\u1ee9c th\u1ea5p (60,0%) \u0111\u1ebfn trung b\u00ecnh (87,1%). Re g\u1eebng c\u00f3 t\u0103ng tr\u01b0\u1edfng b\u00ecnh qu\u00e2n n\u0103m tu\u1ed5i 3 – 4 \u0111\u1ea1t 0,17 – 1,34 cm\/n\u0103m (D00)<\/sub>, Hvn<\/sub> \u0111\u1ea1t 0,30 – 1,05 m\/n\u0103m, Dt \u0111\u1ea1t 0,22 – 0,55 m\/n\u0103m, \u1edf tu\u1ed5i 8, D1,3 <\/sub>\u0111\u1ea1t 0,80 cm\/n\u0103m, Hvn<\/sub> \u0111\u1ea1t 0,83 m\/n\u0103m v\u00e0 Dt \u0111\u1ea1t 0,41 m\/n\u0103m. Lim xanh c\u00f3 t\u0103ng tr\u01b0\u1edfng b\u00ecnh qu\u00e2n n\u0103m tu\u1ed5i 3 – 4 \u0111\u1ea1t 0,22 – 1,23 cm\/n\u0103m (D00<\/sub>), Hvn<\/sub> \u0111\u1ea1t 0,33 -0,63 m\/n\u0103m, Dt \u0111\u1ea1t 0,22 – 0,54 m\/n\u0103m, \u1edf tu\u1ed5i 8 \u0111\u1ea1t 1,79 cm\/n\u0103m (D1,3<\/sub>), Hvn<\/sub> \u0111\u1ea1t 1,00 m\/n\u0103m, Dt \u0111\u1ea1t 0,54 m\/n\u0103m. Sao \u0111en c\u00f3 t\u0103ng tr\u01b0\u1edfng b\u00ecnh qu\u00e2n n\u0103m tu\u1ed5i 3 – 4 \u0111\u1ea1t 0,53 – 1,66 cm\/n\u0103m (D00<\/sub>), Hvn<\/sub> \u0111\u1ea1t 0,32 – 1,25 m\/n\u0103m, Dt \u0111\u1ea1t 0,25 – 0,53 m\/n\u0103m, giai \u0111o\u1ea1n 7 – 8 tu\u1ed5i \u0111\u1ea1t 0,75 – 1,02 cm\/n\u0103m (D1,3<\/sub>), Hvn<\/sub> \u0111\u1ea1t 0,82 – 0,85 m\/n\u0103m, Dt \u0111\u1ea1t 0,32 – 0,42 m\/n\u0103m. Chi\u00eau li\u00eau 1 tu\u1ed5i b\u01b0\u1edbc \u0111\u1ea7u c\u00f3 sinh tr\u01b0\u1edfng t\u1ed1t D00<\/sub> = 1,08 – 1,18cm v\u00e0 Hvn<\/sub> = 0,96 – 1,06m. C\u00e1c lo\u00e0i Re g\u1eebng, Lim xanh, Sao \u0111en \u1edf tu\u1ed5i 3 v\u00e0 4 c\u1ea7n nhu c\u1ea7u \u00e1nh s\u00e1ng l\u1edbn h\u01a1n, \u1edf c\u00e1c m\u1ee9c \u0111\u1ed9 t\u00e0n che th\u1ea5p, c\u00e2y c\u00f3 sinh tr\u01b0\u1edfng t\u1ed1t h\u01a1n so v\u1edbi c\u00e1c m\u1ee9c \u0111\u1ed9 t\u00e0n che cao h\u01a1n \u1edf c\u00f9ng lo\u1ea1i r\u1eebng t\u1ea7ng c\u00e2y cao. Tr\u00ean m\u00f4 h\u00ecnh t\u00e1i l\u1eadp r\u1eebng nhi\u1ec7t \u0111\u1edbi, t\u1ed5ng s\u1ed1 c\u00f3 83 lo\u00e0i c\u00e2y g\u1ed7 v\u00e0 c\u00e2y b\u1ee5i \u0111\u01b0a v\u00e0o tr\u1ed3ng ban \u0111\u1ea7u hi\u1ec7n ch\u1ec9 c\u00f2n t\u1eeb 10 – 17 lo\u00e0i c\u00f3 sinh tr\u01b0\u1edfng ph\u00e1t tri\u1ec3n t\u1ed1t, t\u0103ng tr\u01b0\u1edfng b\u00ecnh qu\u00e2n n\u0103m \u0111\u1ea1t t\u1eeb 0,39 – 2,69 cm v\u1ec1 D1,3<\/sub>, 0,26 – 1,36 v\u1ec1 Hvn<\/sub> v\u00e0 0,15 – 0,54 v\u1ec1 Dt.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> C\u00e2y b\u1ea3n \u0111\u1ecba, sinh tr\u01b0\u1edfng, d\u01b0\u1edbi t\u00e1n r\u1eebng, S\u00f3c S\u01a1n<\/td>\n<\/tr>\n

\n

Growth assessment of some understorey planting models for native species in Soc Son district, Ha Noi<\/strong><\/p>\n

Planting models of 4 native tree species, including Cinnamomum parthenoxylon<\/em>, Erythrophleum fordii, Hopea odorata, Terminalia nigrovenulosa,<\/em> under the canopy of pine, acacia and acacia-pine mixed plantations in Soc Son – Hanoi have a low to moderate survival rate, from 60.0% to 87.1%. For Cinnamomum <\/em>parthenoxylon,<\/em> at the age of 3 – 4, the average growth rate D\u00ad00<\/sub> = 0.17 – 1.34 cm\/year, Hvn<\/sub> = 0.83 m\/year, Dt = 0.22 – 0.55 m\/year; at the age of 8, D1.3<\/sub> = 0.80 cm\/year, Hvn<\/sub> = 0.83 m\/year and Dt = 0.41 m\/year. The average growth rate of 3 – 4 years Erythrophleum fordii<\/em> is D\u00ad00<\/sub> = 0.22 – 1.23 cm\/year, Hvn<\/sub> = 0.33 – 0.63 m\/year and Dt = 0.22 – 0.54 m\/year; up to age 8, D1.3<\/sub> = 1.79 cm\/year, Hvn<\/sub> = 1.00 m\/year and Dt = 0.54 m\/year. The figures for Hopea odorata<\/em> at the same age range of
\n3 – 4 years are: D\u00ad00<\/sub> = 0.53 – 1.66 cm\/year, Hvn<\/sub> = 0.82 – 0.85 m\/yearand Dt = 0.32 – 0.42 m\/year. Terminalia nigrovenulosa at age 1<\/em>initially had good growth
\nD\u00ad00<\/sub> = 1.08 – 1.18 cm and Hvn<\/sub> = 0.96 – 1.06 m. The species of Cinnamomum parthenoxylon<\/em>, Erythrophleum fordii, Hopea odorata<\/em> at the age of 3 and 4 have more light requirement. At low coverage levels, these species grows better than at higher levels in the same types of main plantations. On the model of re-establishing tropical forests, a total of 83 species of woody-species and shrubs were initially planted, but now there are only 10 – 17 species have a good growth and development, with an anual stand average growth rate of D1.3<\/sub> = 0.39 – 2.69 cm, Hvn<\/sub> from 0.26 – 1.36 m, and Dt from 0.15 to 0.54 m.<\/p>\n

Keywords: <\/em><\/strong>Native species, forest growth, understorey, Soc Son District<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u00a0<\/strong><\/p>\n

S\u1eec D\u1ee4NG \u1ea2NH SENTINEL 2 V\u00c0 GOOGLE EARTH ENGINE \u0110\u1ec2\u00a0\u0110\u00c1NH GI\u00c1 BI\u1ebeN \u0110\u1ed8NG DI\u1ec6N T\u00cdCH R\u1eeaNG PH\u00d2NG H\u1ed8 V\u00c0 \u0110\u1eb6C D\u1ee4NG T\u1ea0I HUY\u1ec6N V\u00d5 NHAI, T\u1ec8NH TH\u00c1I NGUY\u00caN<\/p>\n

Nguy\u1ec5n \u0110\u0103ng C\u01b0\u1eddng1*<\/sup>, Ph\u1ea1m \u0110\u1ee9c Ch\u00ednh1<\/sup>, Nguy\u1ec5n V\u0103n B\u00edch2<\/sup><\/p>\n

1<\/sup> Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc N\u00f4ng L\u00e2m, \u0110\u1ea1i h\u1ecdc Th\u00e1i Nguy\u00ean
\n2<\/sup> Vi\u1ec7n Nghi\u00ean c\u1ee9u L\u00e2m sinh, Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Bi\u1ebfn \u0111\u1ed9ng di\u1ec7n t\u00edch r\u1eebng l\u00e0 s\u1ef1 thay \u0111\u1ed5i t\u0103ng hay gi\u1ea3m v\u1ec1 di\u1ec7n t\u00edch r\u1eebng th\u1ec3 hi\u1ec7n qua c\u00e1c th\u1eddi gian kh\u00e1c nhau. Nghi\u00ean c\u1ee9u \u1ee9ng d\u1ee5ng Web – Google Earth Engine (GEE) \u0111\u1ec3 x\u00e2y d\u1ef1ng l\u1edbp hi\u1ec7n tr\u1ea1ng di\u1ec7n t\u00edch c\u00f3 r\u1eebng v\u00e0 \u0111\u1ea5t tr\u1ed1ng v\u00e0 \u0111\u00e1nh gi\u00e1 \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a k\u1ebft qu\u1ea3 ph\u00e2n lo\u1ea1i cho \u1ea3nh Sentinel 2. Nghi\u00ean c\u1ee9u \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n t\u1ea1i di\u1ec7n t\u00edch r\u1eebng \u0111\u1eb7c d\u1ee5ng thu\u1ed9c Ban qu\u1ea3n l\u00fd r\u1eebng \u0111\u1eb7c d\u1ee5ng, ph\u00f2ng h\u1ed9 t\u1ec9nh Th\u00e1i Nguy\u00ean (Tr\u01b0\u1edbc \u0111\u00e2y l\u00e0 Khu b\u1ea3o t\u1ed3n thi\u00ean nhi\u00ean Th\u1ea7n Sa – Ph\u01b0\u1ee3ng Ho\u00e0ng) v\u00e0 khu r\u1eebng ph\u00f2ng h\u1ed9 li\u1ec1n k\u1ec1, \u1edf huy\u1ec7n V\u00f5 Nhai, t\u1ec9nh Th\u00e1i Nguy\u00ean. Nghi\u00ean c\u1ee9u \u0111\u00e3 \u1ee9ng d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p Random Forest (RF) trong ph\u00e2n lo\u1ea1i \u1ea3nh vi\u1ec5n th\u00e1m \u0111\u00e3 c\u1ea3i thi\u1ec7n \u0111\u1ed9 ch\u00ednh x\u00e1c cho \u1ea3nh \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i hi\u1ec7n tr\u1ea1ng r\u1eebng. Nh\u00ecn chung, k\u1ebft qu\u1ea3 x\u00e2y d\u1ef1ng b\u1ea3n \u0111\u1ed3 hi\u1ec7n tr\u1ea1ng cho th\u1ea5y k\u1ebft qu\u1ea3 ph\u00e2n lo\u1ea1i c\u00f3 \u0111\u1ed9 ch\u00ednh x\u00e1c t\u1ed5ng th\u1ec3 qua c\u00e1c n\u0103m 2017; 2018; 2019; 2020 v\u00e0 2021 l\u1ea7n l\u01b0\u1ee3t l\u00e0 98,7%; 99,3%; 99,3%; 98,5% v\u00e0 99,5% v\u1edbi ch\u1ec9 s\u1ed1 Kappa t\u01b0\u01a1ng \u1ee9ng l\u00e0 0,974; 0,985; 0,986; 0,969 v\u00e0 0,990. K\u1ebft qu\u1ea3 cho th\u1ea5y di\u1ec7n t\u00edch r\u1eebng c\u00f3 xu h\u01b0\u1edbng t\u0103ng, c\u1ee5 th\u1ec3 di\u1ec7n t\u00edch r\u1eebng t\u0103ng 894,5 ha trong giai \u0111o\u1ea1n t\u1eeb n\u0103m 2017 \u0111\u1ebfn n\u0103m 2021. Nguy\u00ean nh\u00e2n l\u00e0m t\u0103ng di\u1ec7n t\u00edch r\u1eebng l\u00e0 do tr\u1ed3ng r\u1eebng v\u00e0 ph\u1ee5c h\u1ed3i r\u1eebng tr\u00ean di\u1ec7n t\u00edch n\u00fai \u0111\u1ea5t. \u1ee8ng d\u1ee5ng GEE, \u1ea3nh Sentinel 2 v\u00e0 ph\u01b0\u01a1ng ph\u00e1p RF \u0111\u1ec3 ph\u00e2n lo\u1ea1i r\u1eebng cho th\u1ea5y c\u00f3 \u0111\u1ed9 ch\u00ednh x\u00e1c cao v\u00e0 c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng cho khu v\u1ef1c kh\u00e1c \u1edf t\u1ec9nh Th\u00e1i Nguy\u00ean.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Bi\u1ebfn \u0111\u1ed9ng r\u1eebng, Google Earth Engine, ph\u00e2n lo\u1ea1i \u1ea3nh, Random Forest, Sentinel 2<\/td>\n<\/tr>\n

\n

Using Sentinel 2 data on Google Earth Engine cloud computing platform for assesssing forest cover change in special use and protection forests in Vo Nhai district, Thai Nguyen province<\/strong><\/p>\n

Changing in forest cover leads to a reduction of forest area in a spcecific time period. The research applied Google Earth Engine (GEE) to develop forest cover map layers and acccuracy assessment of classified forest cover maps for Sentinel 2. The study was conducted in special use forest areas in Specieal use and Protection Forest Management Board of Thai Nguyen province (former was Than Sa – Phuong Hoang nature reserve Management Board). Random Forest (RF) was applied in this study for classification and it performed a high acccuracy of classified images for forest covers. The results showed that the classification accuracy of classified maps in 2017, 2018, 2019, 2020 and 2021 was 98.7%; 99.3%; 99.3%; 98.5% v\u00e0 99.5% (Overall acccuracy) and 0.974; 0.985; 0.986; 0.969 v\u00e0 0.990 (Kappa) respectively. There was a significant upward trend of forest cover in the period from 2017 to 2021. Specifically, forested areas rose by 894,5 ha in the period from 2017 to 2021. The drivers of forest cover increase were due to afforestation and forest restoration. Implication of GEE, Sentinel 2 and classification algorithm RF achieved a high accuracy of the forest cover classification and it could be able to apply for other regions in Thai Nguyen province.<\/p>\n

Keywords:<\/em><\/strong> Forest cover change, Google Earth Engine, image classification, Sentinel 2, Random Forest<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u00a0<\/strong><\/p>\n

<\/a><\/a><\/a><\/a><\/a>D\u1ea4U V\u1ebeT C\u00c1C-BON TRONG S\u1ea2N XU\u1ea4T G\u1ed6 TR\u00d2N, G\u1ed6 X\u1eba V\u00c0 D\u0102M G\u1ed6 T\u1eea R\u1eeaNG TR\u1ed2NG KEO \u1ede V\u00d9NG \u0110\u00d4NG B\u1eaeC B\u1ed8<\/p>\n

Nguy\u1ec5n Th\u00f9y M\u1ef9 Linh1<\/sup>, V\u0169 T\u1ea5n Ph\u01b0\u01a1ng2<\/sup>, L\u00ea Th\u1ecb Thu H\u1eb1ng1<\/sup>,
\nHo\u00e0ng Nguy\u1ec5n Vi\u1ec7t Hoa2<\/sup>, Nguy\u1ec5n Anh D\u0169ng3<\/sup><\/p>\n

[1]Vi\u1ec7n Nghi\u00ean c\u1ee9u Sinh th\u00e1i v\u00e0 M\u00f4i tr\u01b0\u1eddng r\u1eebng
\n2Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam,
\n3<\/sup>Trung t\u00e2m Khoa h\u1ecdc L\u00e2m nghi\u1ec7p v\u00f9ng Trung t\u00e2m B\u1eafc B\u1ed9<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

L\u01b0\u1ee3ng ph\u00e1t th\u1ea3i kh\u00ed nh\u00e0 k\u00ednh tr\u00ean m\u1ed9t \u0111\u01a1n v\u1ecb s\u1ea3n ph\u1ea9m g\u1ed7 l\u00e0 m\u1ed9t trong nh\u1eefng ti\u00eau ch\u00ed quan tr\u1ecdng h\u00e0ng \u0111\u1ea7u trong gi\u00e1m s\u00e1t, \u0111\u00e1nh gi\u00e1 t\u0103ng tr\u01b0\u1edfng xanh c\u1ee7a nhi\u1ec1u qu\u1ed1c gia tr\u00ean th\u1ebf gi\u1edbi. \u1ede Vi\u1ec7t Nam, trong b\u1ed1i c\u1ea3nh nhu c\u1ea7u t\u0103ng cao ti\u00eau th\u1ee5 n\u1ed9i \u0111\u1ecba v\u00e0 xu\u1ea5t kh\u1ea9u c\u00e1c s\u1ea3n ph\u1ea9m g\u1ed7, ti\u1ec1m n\u0103ng ph\u00e1t th\u1ea3i trong ho\u1ea1t \u0111\u1ed9ng s\u1ea3n xu\u1ea5t, ch\u1ebf bi\u1ebfn s\u1ea3n ph\u1ea9m g\u1ed7 r\u1ea5t c\u1ea7n ph\u1ea3i c\u00f3 nh\u1eefng t\u00ednh to\u00e1n k\u1ef9 l\u01b0\u1ee1ng \u0111\u1ec3 c\u00f3 nh\u1eefng gi\u1ea3i ph\u00e1p ki\u1ec3m so\u00e1t v\u00e0 h\u1ea1n ch\u1ebf k\u1ecbp th\u1eddi m\u1edbi \u0111\u1ea3m b\u1ea3o duy tr\u00ec \u0111\u01b0\u1ee3c vai tr\u00f2 c\u1ee7a l\u00e2m nghi\u1ec7p trong t\u0103ng h\u1ea5p th\u1ee5 v\u00e0 gi\u1ea3m ph\u00e1t th\u1ea3i kh\u00ed nh\u00e0 k\u00ednh c\u1ee7a qu\u1ed1c gia. K\u1ebft qu\u1ea3 \u0111i\u1ec1u tra x\u00e1c \u0111\u1ecbnh d\u1ea5u v\u1ebft c\u00e1c-bon trong kinh doanh r\u1eebng tr\u1ed3ng keo cho s\u1ea3n ph\u1ea9m g\u1ed7 tr\u00f2n, g\u1ed7 x\u1ebb v\u00e0 d\u0103m g\u1ed7 t\u1ea1i c\u00e1c t\u1ec9nh v\u00f9ng \u0110\u00f4ng B\u1eafc B\u1ed9 (Ph\u00fa Th\u1ecd, Tuy\u00ean Quang v\u00e0 Qu\u1ea3ng Ninh) cho th\u1ea5y d\u1ea5u v\u1ebft c\u00e1c-bon trung b\u00ecnh cho c\u1ea3 v\u00f9ng l\u00e0 -0,474 \u00b1 0,17 t\u1ea5n CO2e<\/sub>\/1 m3<\/sup> g\u1ed7 tr\u00f2n, 1,914 \u00b1 0,1 t\u1ea5n CO2e<\/sub>\/1 m3<\/sup> g\u1ed7 x\u1ebb v\u00e0 0,297 \u00b1 0,55 t\u1ea5n CO2e<\/sub>\/1 t\u1ea5n d\u0103m g\u1ed7. \u0110i\u1ec1u n\u00e0y c\u0169ng c\u00f3 ngh\u0129a l\u01b0\u1ee3ng c\u00e1c-bon \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong s\u1ea3n ph\u1ea9m g\u1ed7 kh\u00f4ng \u0111\u1ee7 b\u00f9 \u0111\u1eafp l\u01b0\u1ee3ng ph\u00e1t th\u1ea3i t\u1eeb c\u00e1c ho\u1ea1t \u0111\u1ed9ng s\u1ea3n xu\u1ea5t ra s\u1ea3n ph\u1ea9m g\u1ed7 x\u1ebb v\u00e0 d\u0103m g\u1ed7. N\u1ebfu nh\u01b0 c\u00e1c ho\u1ea1t \u0111\u1ed9ng s\u1ea3n xu\u1ea5t kh\u00f4ng \u0111\u01b0\u1ee3c t\u00e1c \u0111\u1ed9ng v\u00e0 v\u1edbi chu k\u1ef3 khai th\u00e1c ng\u1eafn (5 – 7 n\u0103m), t\u1ef7 l\u1ec7 g\u1ed7 l\u1ee3i d\u1ee5ng th\u1ea5p, l\u01b0\u1ee3ng c\u00e1c-bon t\u00edch tr\u1eef th\u1ea5p th\u00ec kh\u1ea3 n\u0103ng b\u00f9 \u0111\u1eafp s\u1ebd l\u1ea1i c\u00e0ng th\u1ea5p h\u01a1n. Vi\u1ec7c thay \u0111\u1ed5i c\u00f4ng ngh\u1ec7 trong s\u1ea3n xu\u1ea5t c\u0169ng nh\u01b0 ti\u00eau th\u1ee5 nhi\u00ean li\u1ec7u ho\u00e1 th\u1ea1ch trong c\u00e1c kh\u00e2u s\u1ea3n xu\u1ea5t l\u00e0 gi\u1ea3i ph\u00e1p kh\u00f3. V\u00ec v\u1eady, k\u00e9o d\u00e0i chu k\u1ef3 kinh doanh v\u00e0 n\u0103ng su\u1ea5t r\u1eebng tr\u1ed3ng Keo l\u00e0 gi\u1ea3i ph\u00e1p hi\u1ec7u qu\u1ea3 c\u1ea7n \u0111\u01b0\u1ee3c khuy\u1ebfn kh\u00edch v\u1eeba gi\u00fap t\u0103ng s\u1ea3n l\u01b0\u1ee3ng g\u1ed7 khai th\u00e1c, ch\u1ebf bi\u1ebfn v\u00e0 v\u1eeba gi\u00fap b\u00f9 \u0111\u1eafp l\u01b0\u1ee3ng ph\u00e1t th\u1ea3i trong chu\u1ed7i s\u1ea3n xu\u1ea5t.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> D\u1ea5u v\u1ebft c\u00e1c-bon, ph\u00e1t th\u1ea3i, r\u1eebng tr\u1ed3ng keo, t\u0103ng tr\u01b0\u1edfng xanh, v\u00f9ng \u0110\u00f4ng B\u1eafc<\/td>\n<\/tr>\n

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Carbon footprint in production of round wood, sawn-timber and wood chips produced from acacia plantation in the North East region<\/strong><\/p>\n

The amount of greenhouse gas emissions per unit of wood-based product is one of the most important indicators in monitoring and assessing green growth of many countries around the world. In Vietnam, in the context of high demands for domestic consumption and export of wood products, the emission potential in wood production and processing activities requires careful calculations to have solutions to timely control and maintain the role of forestry sector in the targets of the carbon capture and reduction of greenhouse gas emissions of the country. The research results to estimate the carbon footprint in round wood, sawn-timber and wood chips of acacia plantation in the North East region (Phu Tho, Tuyen Quang, Quang Ninh province) indicated that the average carbon footprint for the whole region was -0.474 \u00b1 0.17 ton CO2e<\/sub>\/1 m3<\/sup> round wood, 1.914 \u00b1 0.1 ton CO2e<\/sub>\/1 m3<\/sup> sawn-timber and 0.297 \u00b1 0.55 ton CO2e<\/sub>\/1 ton wood chips. This means that the amount of carbon sequestrated in wood products is not enough to offset emissions from the production process. The reason may be due to the short harvest cycle (5 – 7 years) with low rate of timber utilization in accordance with low the ability to carbon compensation. Changing technology as well as reduction of fossil fuel consumption in production process is difficult solutions. Instead, increasing the harvesting cycle of acacia plantation is an effective solution that should be encouraged to increase the wood productivity as well as help better offset emissions in the production chain.<\/p>\n

Keywords:<\/em><\/strong> Carbon footprint, greenhouse gas emissions, acacia plantation, green growh, North East region<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

PH\u00c2N T\u00cdCH HI\u1ec6U QU\u1ea2 KINH T\u1ebe – T\u00c0I CH\u00cdNH C\u1ee6A \u0110\u1ec0 \u00c1N PH\u00c1T TRI\u1ec2N DU L\u1ecaCH SINH TH\u00c1I V\u01af\u1edcN QU\u1ed0C GIA C\u00c1T TI\u00caN GIAI \u0110O\u1ea0N 2021 – 2030<\/p>\n

Tr\u1ea7n Th\u1ecb Thu H\u00e01<\/sup>, H\u00e0 Th\u1ecb Ph\u01b0\u01a1ng Th\u1ea3o2<\/sup><\/p>\n

[1]<\/strong>Vi\u1ec7n Nghi\u00ean c\u1ee9u Sinh th\u00e1i v\u00e0 M\u00f4i tr\u01b0\u1eddng r\u1eebng, Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n2Tr\u01b0\u1eddng C\u00e1n b\u1ed9 Qu\u1ea3n l\u00fd N\u00f4ng nghi\u1ec7p v\u00e0 Ph\u00e1t tri\u1ec3n N\u00f4ng th\u00f4n II<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Nghi\u00ean c\u1ee9u n\u00e0y \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n nh\u1eb1m \u0111\u00e1nh gi\u00e1 t\u00ednh kh\u1ea3 thi c\u1ee7a \u0110\u1ec1 \u00e1n Ph\u00e1t tri\u1ec3n Du l\u1ecbch sinh th\u00e1i V\u01b0\u1eddn qu\u1ed1c gia C\u00e1t Ti\u00ean giai \u0111o\u1ea1n 2021 – 2030 v\u1ec1 kh\u00eda c\u1ea1nh kinh t\u1ebf v\u00e0 t\u00e0i ch\u00ednh. K\u1ebft qu\u1ea3 ph\u00e2n t\u00edch cho th\u1ea5y \u0110\u1ec1 \u00e1n n\u00e0y l\u00e0 m\u1ed9t d\u1ef1 \u00e1n \u0111\u1ea7u t\u01b0 kh\u1ea3 thi tuy nhi\u00ean, hi\u1ec7u qu\u1ea3 kinh t\u1ebf kh\u00f4ng th\u1ef1c s\u1ef1 cao (IRR = 5,1%, NPV > 0 \u1edf m\u1ee9c chi\u1ebft kh\u1ea5u 5%) do ph\u1ea3i \u0111\u1ea7u t\u01b0 v\u00e0o nhi\u1ec1u h\u1ea1ng m\u1ee5c ph\u1ee5c v\u1ee5 ch\u1ee7 y\u1ebfu cho m\u1ee5c \u0111\u00edch qu\u1ea3n l\u00fd, b\u1ea3o v\u1ec7 r\u1eebng, ph\u00e1t tri\u1ec3n kinh t\u1ebf – x\u00e3 h\u1ed9i c\u1ee7a \u0111\u1ecba ph\u01b0\u01a1ng v\u00e0 ch\u1ec9 ph\u1ee5c v\u1ee5 m\u1ed9t ph\u1ea7n cho du l\u1ecbch sinh th\u00e1i, ch\u1eb3ng h\u1ea1n nh\u01b0 \u0111\u1ea7u t\u01b0 x\u00e2y d\u1ef1ng, n\u00e2ng c\u1ea5p, s\u1eeda ch\u1eefa c\u00e1c tuy\u1ebfn \u0111\u01b0\u1eddng d\u00e2n sinh quanh khu v\u1ef1c V\u01b0\u1eddn qu\u1ed1c gia. Ng\u01b0\u1ee3c l\u1ea1i, hi\u1ec7u qu\u1ea3 t\u00e0i ch\u00ednh c\u1ee7a \u0110\u1ec1 \u00e1n r\u1ea5t kh\u1ea3 quan (IRR = 63,4%, NPV > 0 \u1edf c\u1ea3 3 m\u1ee9c chi\u1ebft kh\u1ea5u 5%, 7% v\u00e0 10%, m\u1ee9c l\u00e3i r\u00f2ng giao \u0111\u1ed9ng trong kho\u1ea3ng 2,5 – 3,7 t\u1ef7 \u0111\u1ed3ng\/n\u0103m) do v\u1ed1n \u0111\u1ea7u t\u01b0 t\u1eeb ngu\u1ed3n thu c\u1ee7a \u0111\u01a1n v\u1ecb ch\u1ec9 chi\u1ebfm g\u1ea7n 30% t\u1ed5ng nhu c\u1ea7u v\u1ed1n v\u00e0 \u0111\u1ea7u t\u01b0 tr\u1ef1c ti\u1ebfp v\u00e0o c\u00e1c h\u1ea1ng m\u1ee5c ph\u1ee5c v\u1ee5 du l\u1ecbch sinh th\u00e1i t\u1ea1i khu v\u1ef1c trung t\u00e2m v\u01b0\u1eddn. C\u00e1c ph\u00e2n t\u00edch v\u1ec1 \u0111\u1ed9 nh\u1ea1y kh\u00e1c c\u0169ng cho th\u1ea5y, ngay c\u1ea3 khi doanh thu du l\u1ecbch ch\u1ec9 \u0111\u1ea1t 80% d\u1ef1 ki\u1ebfn th\u00ec hi\u1ec7u qu\u1ea3 t\u00e0i ch\u00ednh c\u1ee7a \u0110\u1ec1 \u00e1n v\u1eabn t\u01b0\u01a1ng \u0111\u1ed1i t\u1ed1t (NPV > 0 \u1edf c\u1ea3 3 m\u1ee9c chi\u1ebft kh\u1ea5u, l\u00e3i r\u00f2ng giao \u0111\u1ed9ng trong kho\u1ea3ng 1,2 – 1,9 t\u1ef7 \u0111\u1ed3ng\/n\u0103m) v\u00e0 ch\u1ec9 kh\u00f4ng th\u1ec3 ho\u00e0n v\u1ed1n trong khung th\u1eddi gian ph\u00e2n t\u00edch n\u1ebfu kh\u00f4ng th\u1ec3 huy \u0111\u1ed9ng \u0111\u01b0\u1ee3c tr\u00ean 70% ngu\u1ed3n v\u1ed1n d\u1ef1 ki\u1ebfn t\u1eeb ng\u00e2n s\u00e1ch Nh\u00e0 n\u01b0\u1edbc v\u00e0 ph\u1ea3i d\u00f9ng ngu\u1ed3n thu c\u1ee7a \u0111\u01a1n v\u1ecb \u0111\u1ec3 b\u00f9 v\u00e0o.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Du l\u1ecbch sinh th\u00e1i, V\u01b0\u1eddn qu\u1ed1c gia C\u00e1t Ti\u00ean, hi\u1ec7u qu\u1ea3 kinh t\u1ebf – t\u00e0i ch\u00ednh<\/td>\n<\/tr>\n

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Financial and economic analysis for Cat Tien National Park Ecotourism Plan in the period of 2021 – 2030<\/strong><\/p>\n

This study was carried out to evaluate the economic and financial viability of the Ecotourism Development Plan of Cat Tien National Park in the period of 2021 – 2030 (hereafter known as the Plan). The analysis results showed that the Plan is a feasible investment project, however, its ecconomic efficiency is not too promissing (with the IRR of 5.1% and the NPV>0 at the discount rate of 5%), mostly due to the large investments in multi-purpose facilities which mainly serve for forest protection and local socio-economic development actvities and partly serve for ecotourism development (i.e., investment in building, upgrading and maintainig civil roads around the Park). On the contrary, the financial analysis showed a much better outcome (with the IRR=63.4%, NPV>0 at all three selected discount rates and the net profit ranging from VND 2.5 – 3.7 billion per year). This can be explained that: the investment capital from the Park\u2019s self-financing reveneus only accounts for nearly 30% of the total planned investment cost and is planned to invest directly in the tourism development in the central area of the Park. The sensitivity analysis results showed that even in the case the the tourism revenue in the period of 2021 – 2030 only reaches 80% of the expected amount, the fiancial effciency of the Plan is relatively good (with NPV>0 at all three selected discount rates and the net profit ranging from VND 1.2. – 1.9 billion per year). The only risk posed to the Plan, which makes it no longger feasible in term of fiancial efficiency, is that the Park can not mobilize up to 70% of the planned investment capital from the state budget, therefore, must use its self-financing revenue to fill in the gap.<\/p>\n

Keywords:<\/em><\/strong> Eco-tourism, Cat Tien National Park, financial, economic and fiancial viability<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u00a0<\/strong><\/p>\n

PH\u00c2N T\u00cdCH C\u00c1C CH\u00cdNH S\u00c1CH PH\u00c1T TRI\u1ec2N R\u1eeaNG TR\u1ed2NG QUY M\u00d4 H\u1ed8 GIA \u0110\u00ccNH, TR\u01af\u1edcNG H\u1ee2P NGHI\u00caN C\u1ee8U \u0110I\u1ec2M T\u1ea0I T\u1ec8NH QU\u1ea2NG TR\u1eca<\/p>\n

Nguy\u1ec5n Ho\u00e0ng Ti\u1ec7p1<\/sup>, V\u00f5 \u0110\u1ea1i H\u1ea3i2<\/sup><\/p>\n

1<\/sup>V\u0103n ph\u00f2ng Ch\u1ee9ng ch\u1ec9 qu\u1ea3n l\u00fd r\u1eebng b\u1ec1n v\u1eefng
\n2<\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Nghi\u00ean c\u1ee9u n\u00e0y \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n nh\u1eb1m h\u1ec7 th\u1ed1ng h\u00f3a c\u00e1c ch\u00ednh s\u00e1ch li\u00ean quan \u0111\u1ebfn qu\u1ea3n l\u00fd v\u00e0 ph\u00e1t tri\u1ec3n r\u1eebng tr\u1ed3ng h\u1ed9 gia \u0111\u00ecnh (HG\u0110) \u0111\u01b0\u1ee3c ban h\u00e0nh \u1edf c\u1ea5p Trung \u01b0\u01a1ng (TW) v\u00e0 li\u00ean h\u1ec7 th\u1ef1c ti\u1ec5n t\u1ea1i t\u1ec9nh Qu\u1ea3ng Tr\u1ecb. Nghi\u00ean c\u1ee9u \u0111\u00e3 s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p ph\u00e2n t\u00edch ch\u00ednh s\u00e1ch, k\u1ebft h\u1ee3p v\u1edbi kh\u1ea3o s\u00e1t v\u00e0 ph\u1ecfng v\u1ea5n c\u00e1c c\u00e1n b\u1ed9 qu\u1ea3n l\u00fd, c\u00e1c ch\u1ee7 r\u1eebng t\u1ea1i \u0111\u1ecba ph\u01b0\u01a1ng. K\u1ebft qu\u1ea3 cho th\u1ea5y c\u00f3 35 v\u0103n b\u1ea3n, ch\u00ednh s\u00e1ch \u0111\u00e3 \u0111\u01b0\u1ee3c ban h\u00e0nh b\u1edfi c\u00e1c c\u01a1 quan \u1edf c\u1ea5p TW, trong \u0111\u00f3 Ch\u00ednh s\u00e1ch \u0111\u1ea5t \u0111ai v\u00e0 h\u01b0\u1edfng d\u1ee5ng r\u1eebng (14 v\u0103n b\u1ea3n); Ch\u00ednh s\u00e1ch khoa h\u1ecdc c\u00f4ng ngh\u1ec7 v\u00e0 khuy\u1ebfn l\u00e2m (9 v\u0103n b\u1ea3n); Ch\u00ednh s\u00e1ch t\u00edn d\u1ee5ng, \u0111\u1ea7u t\u01b0, thu\u1ebf v\u00e0 ph\u00ed (12 v\u0103n b\u1ea3n). C\u00e1c ch\u00ednh s\u00e1ch n\u00e0y \u0111\u00e3 t\u1ea1o h\u00e0nh lang ph\u00e1p l\u00fd \u0111\u1ec3 giao \u0111\u1ea5t, giao r\u1eebng cho HG\u0110, t\u1ea1o ra v\u00e0 \u0111\u01b0a v\u00e0o s\u1ea3n xu\u1ea5t c\u00e1c gi\u1ed1ng m\u1edbi c\u00f3 n\u0103ng su\u1ea5t cao cho HG\u0110 s\u1eed d\u1ee5ng, huy \u0111\u1ed9ng c\u00e1c ngu\u1ed3n l\u1ef1c \u0111\u1ec3 h\u1ed7 tr\u1ee3 HG\u0110 ph\u00e1t tri\u1ec3n r\u1eebng tr\u1ed3ng s\u1ea3n xu\u1ea5t. K\u1ebft qu\u1ea3 l\u00e0 \u0111\u1ebfn n\u0103m 2020, \u0111\u00e3 c\u00f3 1,87 tri\u1ec7u ha r\u1eebng tr\u1ed3ng \u0111ang \u0111\u01b0\u1ee3c qu\u1ea3n l\u00fd, s\u1eed d\u1ee5ng b\u1edfi c\u00e1c HG\u0110. Th\u1ef1c hi\u1ec7n c\u00e1c ch\u1ee7 tr\u01b0\u01a1ng, ch\u00ednh s\u00e1ch ban h\u00e0nh \u1edf c\u1ea5p TW, t\u1ec9nh Qu\u1ea3ng Tr\u1ecb c\u0169ng \u0111\u00e3 c\u00f3 nhi\u1ec1u c\u00e1c ch\u1ee7 tr\u01b0\u01a1ng, h\u1ed7 tr\u1ee3 v\u00e0 th\u00fac \u0111\u1ea9y ph\u00e1t tri\u1ec3n r\u1eebng tr\u1ed3ng s\u1ea3n xu\u1ea5t HG\u0110 nh\u01b0 t\u0103ng c\u01b0\u1eddng giao \u0111\u1ea5t giao r\u1eebng, thu h\u1ed3i \u0111\u1ea5t c\u1ee7a c\u00e1c t\u1ed5 ch\u1ee9c s\u1eed d\u1ee5ng kh\u00f4ng hi\u1ec7u qu\u1ea3 \u0111\u1ec3 giao cho HG\u0110, t\u0103ng c\u01b0\u1eddng ki\u1ec3m so\u00e1t v\u00e0 n\u00e2ng cao ch\u1ea5t l\u01b0\u1ee3ng ngu\u1ed3n gi\u1ed1ng,… Tuy nhi\u00ean, c\u00e1c ch\u00ednh s\u00e1ch c\u00f2n nhi\u1ec1u kho\u1ea3ng tr\u1ed1ng c\u1ea7n ph\u1ea3i \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n trong th\u1eddi gian t\u1edbi nh\u01b0 di\u1ec7n t\u00edch \u0111\u1ea5t \u0111ai c\u1ee7a HG\u0110 manh m\u00fan, nh\u1ecf l\u1ebb, thi\u1ebfu s\u1ef1 li\u00ean k\u1ebft gi\u1eefa HG\u0110 v\u00e0 doanh nghi\u1ec7p theo chu\u1ed7i gi\u00e1 tr\u1ecb, HG\u0110 c\u00f2n s\u1eed d\u1ee5ng gi\u1ed1ng ch\u01b0a \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng, ngu\u1ed3n g\u1ed1c v\u00e0 ch\u1ee7 y\u1ebfu tr\u1ed3ng r\u1eebng g\u1ed7 nh\u1ecf, c\u00f2n \u00edt quan t\u00e2m \u0111\u1ebfn tr\u1ed3ng r\u1eebng th\u00e2m canh g\u1ed7 l\u1edbn,… B\u00e0i b\u00e1o \u0111\u00e3 \u0111\u1ec1 xu\u1ea5t \u0111\u1ecbnh h\u01b0\u1edbng s\u1eeda \u0111\u1ed5i c\u00e1c ch\u00ednh s\u00e1ch v\u00e0 gi\u1ea3i ph\u00e1p th\u00fac \u0111\u1ea9y ph\u00e1t tri\u1ec3n, n\u00e2ng cao n\u0103ng su\u1ea5t, hi\u1ec7u qu\u1ea3 r\u1eebng tr\u1ed3ng s\u1ea3n xu\u1ea5t HG\u0110.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> R\u1eebng tr\u1ed3ng, h\u1ed9 gia \u0111\u00ecnh, ch\u00ednh s\u00e1ch, t\u1ec9nh Qu\u1ea3ng Tr\u1ecb<\/td>\n<\/tr>\n

\n

Analyzing policies to promote household plantation, case study in Quang Tri province<\/strong><\/p>\n

This study was conducted in order to systematize policies related to the management and development of household plantations which issued at the central level government and how they are applied to practice in Quang Tri province. The study used a policy review method, combined with surveys and interviews with local forest management staffs. The results show that there are 35 documents and policies have been issued by government agencies at the central level, including the policy related to land and forest use (14 documents); policy related to science, technology and forestry extension (9 documents); policy related to credit, investment, tax and fee (12 documents). These policies have created a legal framework to allocate land and forests to households, create and bring to the field new and high-yield varieties for households to plant, and mobilize resources to support household plantation development. As a result, by 2020, there is about 1.87 million hectares of planted forests are being managed and used by households. Implementing the guidelines and policies issued at the central level, Quang Tri province has been released many guidelines and policy to supports and promotes the development of household production plantations such as enhancing forest land allocation, forest allocation for household; transferring forest land which is inefficient use by organizations to households; controlling and improving quality of seedling sources, etc. However, policies still have many gaps that need to be filled out in the coming time such as forest land of households is fragmented, small; lacks of the link between households and enterprises along the value chain, the household still uses varieties that have not been controlled; households are mainly planting forest for small size timber and not much attention to sawlog plantation, etc. The article has proposed orientations to amend policies and solutions to promote development, improve productivity and efficiency of household plantations.<\/p>\n

\u00a0Keywords:<\/em><\/strong> Plantation, household, policy, Quang Tri province<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

NGHI\u00caN C\u1ee8U \u0110\u1eb6C \u0110I\u1ec2M C\u1ee6A V\u1eacT LI\u1ec6U CH\u00c1Y D\u01af\u1edaI T\u00c1N R\u1eeaNG TH\u00d4NG \u1ede VI\u1ec6T NAM<\/p>\n

V\u0169 V\u0103n \u0110\u1ecbnh<\/p>\n

Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Th\u00f4ng l\u00e0 c\u00e2y \u0111a t\u00e1c d\u1ee5ng, cung c\u1ea5p nh\u1ef1a, g\u1ed7, ngo\u00e0i ra r\u1eebng th\u00f4ng \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c ph\u00f2ng h\u1ed9, b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng sinh th\u00e1i, l\u00e0m t\u0103ng v\u1ebb \u0111\u1eb9p c\u1ea3nh quan thi\u00ean nhi\u00ean, ph\u1ee5c v\u1ee5 du l\u1ecbch ngh\u1ec9 d\u01b0\u1ee1ng v\u00e0 an ninh qu\u1ed1c ph\u00f2ng. R\u1eebng th\u00f4ng r\u1ea5t d\u1ec5 b\u1ecb ch\u00e1y khi ch\u00e1y l\u1eeda lan nhanh, kh\u00f3 d\u1eadp t\u1eaft n\u00ean g\u00e2y thi\u1ec7t h\u1ea1i l\u1edbn. T\u00ednh ri\u00eang giai \u0111o\u1ea1n t\u1eeb 2015 \u0111\u1ebfn th\u00e1ng 12\/2020 t\u1ed5ng s\u1ed1 \u0111\u00e3 x\u1ea3y ra 1.928 v\u1ee5 ch\u00e1y r\u1eebng, di\u1ec7n t\u00edch ch\u00e1y r\u1eebng l\u00ean \u0111\u1ebfn 8.631 ha, trong \u0111\u00f3 r\u1eebng th\u00f4ng chi\u1ebfm di\u1ec7n t\u00edch l\u1edbn nh\u1ea5t khi ch\u00e1y, l\u1eeda lan nhanh, r\u1ea5t kh\u00f3 d\u1eadp t\u1eaft do r\u1eebng th\u00f4ng c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng v\u1eadt li\u1ec7u ch\u00e1y nhi\u1ec1u, kh\u00f3 ph\u00e2n h\u1ee7y, trong v\u1eadt li\u1ec7u ch\u00e1y l\u1ea1i c\u00f3 nh\u1ef1a th\u00f4ng r\u1ea5t d\u1ec5 b\u00e9n l\u1eeda. Kh\u1ed1i l\u01b0\u1ee3ng v\u1eadt li\u1ec7u ch\u00e1y trung b\u00ecnh \u1edf d\u01b0\u1edbi t\u00e1n r\u1eebng th\u00f4ng t\u1eeb c\u1ea5p tu\u1ed5i I – V bi\u1ebfn \u0111\u1ed9ng t\u1eeb 9,15 – 16,34 t\u1ea5n\/ha trong \u0111\u00f3 c\u1ea5p IV c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng l\u1edbn nh\u1ea5t 16,34 t\u1ea5n\/ha. T\u1ed5ng kh\u1ed1i l\u01b0\u1ee3ng v\u1eadt li\u1ec7u r\u01a1i r\u1ee5ng h\u00e0ng n\u0103m \u1edf c\u1ea5p tu\u1ed5i I – V bi\u1ebfn \u0111\u1ed9ng t\u1eeb 1.924,2 – 5.420,7 kg\/ha. V\u1eadt li\u1ec7u ch\u00e1y d\u01b0\u1edbi t\u00e1n r\u1eebng th\u00f4ng \u1edf c\u00e1c c\u1ea5p tu\u1ed5i v\u00e0 c\u00e1c \u0111\u1ecba \u0111i\u1ec3m kh\u00e1c nhau th\u00ec \u0111\u1ed9 \u1ea9m kh\u00e1c nhau, \u0111\u1ed9 \u1ea9m dao \u0111\u1ed9ng t\u1eeb 16,5 – 41,1%. Th\u00f4ng c\u1ea5p tu\u1ed5i I – V h\u00e0m l\u01b0\u1ee3ng tinh d\u1ea7u trung b\u00ecnh bi\u1ebfn \u0111\u1ed9ng bi\u1ebfn t\u1eeb 4,19 – 6,31%. Th\u00e0nh ph\u1ea7n cellulose \u1edf l\u00e1 c\u1ee7a th\u00f4ng t\u1ea1i c\u00e1c \u0111\u1ecba \u0111i\u1ec3m nghi\u00ean c\u1ee9u t\u1eeb 22,66 – 31,09 % v\u00e0 th\u00e0nh ph\u1ea7n lignin dao \u0111\u1ed9ng t\u1eeb 31,82 – 38,85%.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Th\u00f4ng, v\u1eadt li\u1ec7u ch\u00e1y, ch\u00e1y r\u1eebng<\/td>\n<\/tr>\n

\n

Research on characteristics of flammable material under Pinus sp forest canopy in vietnam<\/strong><\/p>\n

Pinus spp. are a multi-purpose tree, providing resin and wood. In addition, pine forests also play an important role in protecting the ecological environment, increasing the beauty of natural landscapes, serving tourism and national security. Pine forests are prone to fire, when the fire spreads quickly and very difficult to be extinguished, causing great damage. In the period from 2015 to December 2020 alone, there have been 1,928 forest fires, with an area of \u200b\u200b8,631 hectares, of which pine forest occupies the largest area when the fire spreads rapidly, which is difficult to extinguish due to the forest. Pine has a large volume of combustible material, difficult to decompose, in the combustible material, there is turpentine that is very easy to catch fire. The average amount of burning material under the canopy of Pinus spp. at I-V age level varies from 9.15 – 16.34 tons\/ha, of which level IV has the largest volume at 16.34 tons\/ha. The annual total volume of falling materials at the age of I – V varies from 1,924.2 – 5,420.7 kg\/ha. Burning materials under the canopy of Pinus spp. at different age levels and different locations, the humidity varies, ranging from 16.5 to 41.1%. Pinus spp at I – V of age level has the average content of oil varying from 4.19 – 6.31%. The composition of cellulose in pine needles in the study sites ranged from 22.66% to 31.09% and the lignin content ranged from 31.82% to 38.85%.<\/p>\n

Keywords:<\/em><\/strong> Pinus <\/em>spp., <\/em>flammable material, forest fires<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

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\u0110\u00c1NH GI\u00c1 HI\u1ec6U L\u1ef0C C\u1ee6A M\u1ed8T S\u1ed0 LO\u1ea0I THU\u1ed0C SINH H\u1eccC\u00a0V\u00c0 H\u00d3A H\u1eccC \u1ee8C CH\u1ebe N\u1ea4M Fusarium solani\u00a0<\/em>G\u00c2Y B\u1ec6NH TH\u1ed0I M\u0102NG TRE B\u00c1T \u0110\u1ed8<\/p>\n

Tr\u1ea7n Xu\u00e2n H\u01b0ng, Nguy\u1ec5n Th\u1ecb Minh H\u1eb1ng<\/p>\n

Trung t\u00e2m Nghi\u00ean c\u1ee9u B\u1ea3o v\u1ec7 r\u1eebng – Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Tre B\u00e1t \u0111\u1ed9 (Dendrocalamus latiflorus<\/em>) l\u00e0 lo\u00e0i c\u00e2y \u0111ang \u0111\u01b0\u1ee3c g\u00e2y tr\u1ed3ng ph\u1ed5 bi\u1ebfn t\u1ea1i nhi\u1ec1u \u0111\u1ecba ph\u01b0\u01a1ng, mang l\u1ea1i gi\u00e1 tr\u1ecb kinh t\u1ebf cao t\u1eeb khai th\u00e1c m\u0103ng v\u00e0 l\u00e1. Tuy nhi\u00ean, b\u1ec7nh th\u1ed1i m\u0103ng do n\u1ea5m Fusarium solani<\/em> g\u00e2y ra tr\u00ean c\u00e1c di\u1ec7n t\u00edch tr\u1ed3ng tre B\u00e1t \u0111\u1ed9 v\u1edbi t\u1ef7 l\u1ec7 c\u00e2y b\u1ecb nhi\u1ec5m b\u1ec7nh t\u1eeb 25,4 – 32,5% \u0111\u00e3 l\u00e0m \u1ea3nh h\u01b0\u1edfng l\u1edbn \u0111\u1ebfn n\u0103ng su\u1ea5t v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng m\u0103ng. Nghi\u00ean c\u1ee9u n\u00e0y nh\u1eb1m \u0111\u00e1nh gi\u00e1 hi\u1ec7u l\u1ef1c \u1ee9c ch\u1ebf n\u1ea5m F. solani<\/em> g\u00e2y ra b\u1ec7nh th\u1ed1i m\u0103ng tre B\u00e1t \u0111\u1ed9 c\u1ee7a c\u00e1c ho\u1ea1t ch\u1ea5t sinh h\u1ecdc v\u00e0 h\u00f3a h\u1ecdc \u1edf ph\u00f2ng th\u00ed nghi\u1ec7m v\u00e0 r\u1eebng tr\u1ed3ng. K\u1ebft qu\u1ea3 th\u1eed nghi\u1ec7m trong ph\u00f2ng th\u00ed nghi\u1ec7m \u0111\u00e3 x\u00e1c \u0111\u1ecbnh hai ho\u1ea1t ch\u1ea5t sinh h\u1ecdc l\u00e0 Cytosinpeptidemycyn\u00a0v\u00e0 Trichoderma viride <\/em>c\u00f3 hi\u1ec7u l\u1ef1c \u1ee9c ch\u1ebf m\u1ea1nh v\u1edbi \u0111\u01b0\u1eddng k\u00ednh v\u00f2ng \u1ee9c ch\u1ebf 12,2 – 13,9 mm. Hai ho\u1ea1t ch\u1ea5t h\u00f3a h\u1ecdc Difenoconazole v\u00e0 Mancozeb c\u00f3 hi\u1ec7u l\u1ef1c \u1ee9c ch\u1ebf r\u1ea5t m\u1ea1nh v\u1edbi \u0111\u01b0\u1eddng k\u00ednh v\u00f2ng \u1ee9c ch\u1ebf 20,2 – 23,7 mm. Tuy nhi\u00ean ch\u1ec9 c\u00f3 T. viride<\/em> v\u00e0 hai ho\u1ea1t ch\u1ea5t h\u00f3a h\u1ecdc c\u00f3 hi\u1ec7u qu\u1ea3 ph\u00f2ng tr\u1eeb cao khi th\u1eed nghi\u1ec7m ngo\u00e0i hi\u1ec7n tr\u01b0\u1eddng. C\u1ea7n ti\u1ebfp t\u1ee5c nghi\u00ean c\u1ee9u bi\u1ec7n ph\u00e1p ph\u00f2ng tr\u1eeb t\u1ed5ng h\u1ee3p \u0111\u1ec3 qu\u1ea3n l\u00fd b\u1ec7nh th\u1ed1i m\u0103ng hi\u1ec7u qu\u1ea3 v\u00e0 b\u1ec1n v\u1eefng.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> B\u1ec7nh th\u1ed1i m\u0103ng, Dendrocalamus latiflorus, Trichoderma viride<\/em>, Difenoconazole v\u00e0 Mancozeb.<\/td>\n<\/tr>\n

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Evaluation of inhibitory effectiveness of some biological and chemical fungicides against fungalpathogen Fusarium solani<\/em> causing the shoot rot disease on Bat do bamboo<\/strong><\/p>\n

Bat do bamboo (Dendrocalamus latiflorus<\/em>) is commonly growing in many localities, has provided a high economic value from the harvest of emerging bamboo shoots and leaf products. However, the rot disease of emerging shoot caused by F. solani<\/em> on bamboo plantations with the disease incidence of 25.4 -32.5%, which significantly impacted the yield and quality of bamboo shoots. This study assessed the inhibition effectiveness of biological and chemical agents to the growth of F. solani<\/em> in vitro and the efficiency in controlling the rot disease of emerging shoots in the field. In the in vitro experiment, Cytosinpeptidemycyn\u00a0and Trichoderma viride<\/em> have a strong inhibition with the inhibition diameter of 12.2 – 13.9 mm, while Difenoconazole and Mancozeb have a very strong inhibition with the inhibition diameter of 20.2 – 23.7 mm. However, only biological agent T. viride <\/em>and two chemical agents provided a significant efficiency in controlling this disease from 60.3 – 75.8% in the field. A study of integrated pest management was needed to sustainably manage the shoot rot disease on bamboo plantations.<\/p>\n

Keywords:<\/em><\/strong> Emerging shoot rot, Dendrocalamus<\/em> latiflorus<\/em>, Trichoderma viride<\/em>, Difenoconazole v\u00e0 Mancozeb<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>CH\u00c2U CH\u1ea4U TRE L\u01afNG V\u00c0NG (Ceracris kiangsu <\/em>Tsai)\u00a0H\u1ea0I LU\u1ed2NG, V\u1ea6U V\u00c0 N\u1ee8A T\u1ea0I T\u1ec8NH THANH H\u00d3A<\/p>\n

Nguy\u1ec5n Minh Ch\u00ed<\/p>\n

Trung t\u00e2m Nghi\u00ean c\u1ee9u B\u1ea3o v\u1ec7 r\u1eebng, Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Ch\u00e2u ch\u1ea5u tre l\u01b0ng v\u00e0ng g\u00e2y h\u1ea1i r\u1ea5t ph\u1ed5 bi\u1ebfn \u0111\u1ed1i v\u1edbi c\u00e1c lo\u00e0i tre, lu\u1ed3ng \u1edf Trung Qu\u1ed1c v\u00e0 L\u00e0o. T\u1ea1i Vi\u1ec7t Nam, ch\u00fang xu\u1ea5t hi\u1ec7n v\u00e0 \u0111\u00e3 g\u00e2y h\u1ea1i nhi\u1ec1u r\u1eebng tre, lu\u1ed3ng. Nghi\u00ean c\u1ee9u n\u00e0y nh\u1eb1m m\u00f4 t\u1ea3 \u0111\u1eb7c \u0111i\u1ec3m h\u00ecnh th\u00e1i, gi\u00e1m \u0111\u1ecbnh lo\u00e0i v\u00e0 x\u00e1c \u0111\u1ecbnh hi\u1ec7n tr\u1ea1ng g\u00e2y h\u1ea1i c\u1ee7a ch\u00e2u ch\u1ea5u tr\u00ean r\u1eebng lu\u1ed3ng, v\u1ea7u, n\u1ee9a \u1edf t\u1ec9nh Thanh H\u00f3a. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u x\u00e1c \u0111\u1ecbnh ch\u00e2u ch\u1ea5u g\u00e2y h\u1ea1i r\u1eebng lu\u1ed3ng, v\u1ea7u, n\u1ee9a t\u1ea1i Thanh H\u00f3a l\u00e0 lo\u00e0i Ch\u00e2u ch\u1ea5u tre l\u01b0ng v\u00e0ng (Ceracris kiangsu<\/em> Tsai), g\u00e2y h\u1ea1i r\u1ea5t ph\u1ed5 bi\u1ebfn tr\u00ean r\u1eebng lu\u1ed3ng. Sau khi \u0103n tr\u1ee5i l\u00e1, ch\u00fang s\u1ebd di chuy\u1ec3n sang nh\u1eefng khu r\u1eebng kh\u00e1c \u0111\u1ec3 \u0103n b\u1ed5 sung cho \u0111\u1ebfn khi \u0111\u1ebb tr\u1ee9ng. R\u1eebng lu\u1ed3ng, v\u1ea7u, n\u1ee9a b\u1ecb Ch\u00e2u ch\u1ea5u tre l\u01b0ng v\u00e0ng g\u00e2y h\u1ea1i c\u00f3 xu h\u01b0\u1edbng t\u0103ng theo th\u1eddi gian. Hi\u1ec7n t\u1ea1i, r\u1eebng v\u1ea7u v\u00e0 n\u1ee9a \u1edf Quan S\u01a1n b\u1ecb h\u1ea1i nh\u1eb9, t\u1ef7 l\u1ec7 b\u1ecb h\u1ea1i 12,6 – 14,5%. R\u1eebng lu\u1ed3ng v\u00e0 n\u1ee9a \u1edf M\u01b0\u1eddng L\u00e1t b\u1ecb h\u1ea1i n\u1eb7ng, t\u1ef7 l\u1ec7 b\u1ecb h\u1ea1i t\u1edbi 61 – 65%. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u n\u00e0y ch\u1ec9 r\u00f5 c\u1ea7n ph\u1ea3i gi\u00e1m s\u00e1t v\u00e0 nghi\u00ean c\u1ee9u bi\u1ec7n ph\u00e1p ph\u00f2ng tr\u1eeb, qu\u1ea3n l\u00fd hi\u1ec7u qu\u1ea3 lo\u00e0i s\u00e2u h\u1ea1i n\u00e0y.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Ch\u00e2u ch\u1ea5u tre, c\u00f4n tr\u00f9ng, r\u1eebng lu\u1ed3ng, n\u1ee9a, v\u1ea7u, s\u00e2u h\u1ea1i<\/td>\n<\/tr>\n

\n

Yellow-spined bamboo locust (Ceracris kiangsu <\/em>Tsai) damaging bamboo in Thanh Hoa province<\/strong><\/p>\n

Yellow-spined bamboo locust has been reported as the dangerous species that causes serve damages to bamboo forests in China and Laos. Recently, these insects have widespread and appeared in Vietnamese bamboo forests. Thus, it is necessary to understand the biological characteristics and evaluate the damaged trees caused by this species. This study aims to describe the morphological characteristics, identify and assess the damage status of the locust in bamboo forests in Thanh Hoa province. Research results showed that yellow-spined bamboo locust (Ceracris kiangsu <\/em>Tsai) was ascribed to threaten the bamboo forests in Thanh Hoa province. This species was found to be very common in the Dendrocalamus barbatus<\/em> area. They destroyed the bamboo forest by eating all the leaves, and continue moving to other area for supplement until they lay eggs. There has been an increase in destroyed bamboo forests area caused by yellow-spined bamboo locust. Currently, Donax cannaeformis<\/em> and Schizostachyum<\/em> spp. forests in Quan Son were slightly damaged, the damage incidence was 12.6 – 14.5%. D. barbatus<\/em> and Schizostachyum<\/em> spp. forests in Muong Lat were severely damaged, the damage incidence was 61 – 65%. From this result, it is necessary to monitor and study control measures for effectively manage of this insect pest.<\/p>\n

Keywords:<\/em><\/strong> Bamboo locust, Ceracris kiangsu<\/em>, Dendrocalamus barbatus<\/em>, insect pest<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u1ea2NH H\u01af\u1edeNG C\u1ee6A L\u1eacP \u0110\u1ecaA \u0110\u1ebeN SINH TR\u01af\u1edeNG\u00a0C\u1ee6A R\u1eeaNG B\u1ea6N TR\u1eaeNG (Sonneratia alba<\/em>)
\n\u1ede KHU V\u1ef0C VEN BI\u1ec2N T\u1ec8NH TH\u1eeaA THI\u00caN – HU\u1ebe<\/p>\n

L\u00ea Thanh Quang1<\/sup>, Th\u00e1i Th\u00e0nh L\u01b0\u1ee3m2<\/sup>, Akihiro Itai3<\/sup>, <\/sub>Ho\u00e0ng V\u0103n Th\u01a1i1<\/sup>,
\nKi\u1ec1u Tu\u1ea5n \u0110\u1ea1t1,<\/sup> Nguy\u1ec5n Kh\u1eafc \u0110i\u1ec7u1 <\/sup>v\u00e0 Ki\u1ec1u M\u1ea1nh H\u00e01<\/sup><\/p>\n

1 <\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Nam B\u1ed9
\n2 <\/sup>Tr\u01b0\u1eddng \u0111\u1ea1i h\u1ecdc Ki\u00ean Giang
\n3<\/sup> Tr\u01b0\u1eddng \u0111\u1ea1i h\u1ecdc Kyoto<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Nghi\u00ean c\u1ee9u na\u0300y gi\u01a1\u0301i thi\u00ea\u0323u a\u0309nh h\u01b0\u1edfng c\u1ee7a l\u00e2\u0323p \u0111i\u0323a \u0111\u1ebfn sinh tr\u01b0\u1edfng c\u1ee7a r\u01b0\u0300ng B\u00e2\u0300n tr\u0103\u0301ng (Sonneratia alba<\/em>) trong giai \u0111o\u1ea1n 4 tu\u00f4\u0309i ta\u0323i khu v\u01b0\u0323c ven bi\u00ea\u0309n thu\u00f4\u0323c ti\u0309nh Th\u01b0\u0300a Thi\u00ean – Hu\u00ea\u0301. 3 d\u1ea1ng l\u1eadp \u0111\u1ecba \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u g\u1ed3m: d\u1ea1ng b\u00e3i tri\u00eau b\u1ed3i t\u1ee5 (l\u1eadp \u0111\u1ecba I), b\u00e3i tri\u1ec1u b\u1ecb x\u00f3i m\u00f2n b\u1ec1 m\u1eb7t (l\u1eadp \u0111\u1ecba II) v\u00e0 d\u1ea1ng c\u00f3 cao \u0111\u1ed9 b\u1ec1 m\u1eb7t v\u00e0 th\u1ee7y tri\u1ec1u th\u1ea5p (l\u1eadp \u0111\u1ecba III). Mu\u0323c ti\u00eau nghi\u00ean c\u1ee9u la\u0300 xa\u0301c \u0111i\u0323nh l\u00e2\u0323p \u0111i\u0323a thi\u0301ch h\u01a1\u0323p \u0111\u00f4\u0301i v\u01a1\u0301i sinh tr\u01b0\u1edfng c\u1ee7a r\u01b0\u0300ng tr\u00f4\u0300ng B\u00e2\u0300n tr\u0103\u0301ng. R\u01b0\u0300ng B\u00e2\u0300n tr\u0103\u0301ng \u0111\u01b0\u01a1\u0323c tr\u00f4\u0300ng v\u01a1\u0301i m\u00e2\u0323t \u0111\u00f4\u0323 3.300 c\u00e2y\/ha. B\u00e2\u0300n tr\u0103\u0301ng \u0111\u01b0\u01a1\u0323c tr\u00f4\u0300ng theo ha\u0300ng va\u0300 \u0111\u01b0\u01a1\u0323c ba\u0309o v\u00ea\u0323 b\u0103\u0300ng ca\u0301c t\u01b0\u1eddng m\u1ec1m \u0111\u1ec3 l\u00e0m gi\u1ea3m a\u0309nh h\u01b0\u01a1\u0309ng cu\u0309a s\u00f3ng l\u01a1\u0301n. K\u00ea\u0301t qua\u0309 nghi\u00ean c\u01b0\u0301u chi\u0309 ra r\u0103\u0300ng ty\u0309 l\u00ea\u0323 s\u00f4\u0301ng va\u0300 sinh tr\u01b0\u01a1\u0309ng cu\u0309a r\u01b0\u0300ng B\u00e2\u0300n tr\u0103\u0301ng trong giai \u0111oa\u0323n 4 tu\u00f4\u0309i thay \u0111\u00f4\u0309i tu\u0300y theo da\u0323ng l\u00e2\u0323p \u0111i\u0323a. R\u01b0\u0300ng B\u00e2\u0300n tr\u0103\u0301ng sinh tr\u01b0\u01a1\u0309ng t\u00f4\u0301t nh\u00e2\u0301t \u01a1\u0309 da\u0323ng l\u00e2\u0323p \u0111i\u0323a II, c\u00f3 t\u1ef7 l\u1ec7 s\u1ed1ng l\u00e0 87%, \u0111\u01b0\u1eddng k\u00ednh l\u00e0 10,7 cm v\u00e0 chi\u1ec1u cao l\u00e0 295,6 cm, th\u1ea5p nh\u00e2\u0301t \u01a1\u0309 da\u0323ng l\u00e2\u0323p \u0111i\u0323a III, c\u00f3 t\u1ef7 l\u1ec7 s\u1ed1ng l\u00e0 84,5%, \u0111\u01b0\u1eddng k\u00ednh l\u00e0 5,8 cm v\u00e0 chi\u1ec1u cao l\u00e0 191,3 cm. Tr\u00f4\u0300ng r\u01b0\u0300ng v\u01a1\u0301i m\u00e2\u0323t \u0111\u00f4\u0323 3.300 c\u00e2y\/ha va\u0300 gi\u01b0\u0303a ca\u0301c ha\u0300ng c\u00e2y \u0111\u01b0\u01a1\u0323c che ch\u0103\u0301n b\u0103\u0300ng ca\u0301c t\u01b0\u1eddng m\u1ec1m giu\u0301p cho r\u01b0\u0300ng B\u00e2\u0300n tr\u0103\u0301ng co\u0301 ty\u0309 l\u00ea\u0323 s\u00f4\u0301ng cao va\u0300 sinh tr\u01b0\u01a1\u0309ng t\u00f4\u0301t.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> L\u00e2\u0323p \u0111i\u0323a r\u01b0\u0300ng, ha\u0300ng ra\u0300o ch\u00f4\u0301ng so\u0301ng, r\u01b0\u0300ng B\u00e2\u0300n tr\u0103\u0301ng, m\u00f4 hi\u0300nh tuy\u00ea\u0301n ti\u0301nh t\u00f4\u0309ng qua\u0301t, ty\u0309 l\u00ea\u0323 s\u00f4\u0301ng cu\u0309a r\u01b0\u0300ng B\u00e2\u0300n tr\u0103\u0301ng.<\/td>\n<\/tr>\n

\n

Influence of site on growth of Sonneratia alba<\/em> forest in the coastal area of Thua Thien – Hue province<\/strong><\/p>\n

This study examines the influence of site on the first four years of growth of plantation Sonneratia alba<\/em> in the coastal area of \u200b\u200bThua Thien – Hue province. There were three types of site: an accreting tidal flat (Site type I); a tidal flat with surface erosion (Site type II); surface level with low tide (Site type III). The initial planting density was 3,300 trees\/ha, and the seedlings were planted in rows and protected by soft breakwater constructed of bamboo and small shrubs to reduce the influence of large waves. The survival rate and diameter growth at age 4 years were, respectively, best in site type II is 87%, diameter is 10.7 cm and height is 295,6 cm and worst in site type III is 84.5%, diameter is 5.8 cm and height is 191.3 cm. Afforestation with S. alba<\/em> using these practices and Site II types is recommended.<\/p>\n

Keywords:<\/em><\/strong> Forest site, breakwater walls, plantation of Sonneratia alba<\/em>, general linear model, survival rate of plantation of Sonneratia alba<\/em><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

T\u1ea0P CH\u00cd KHOA H\u1eccC L\u00c2M NGHI\u1ec6P S\u1ed0 1 – 2022   1. \u0110\u1eb7c \u0111i\u1ec3m c\u1ee7a h\u1ed9 gia \u0111\u00ecnh ng\u01b0\u1eddi Dao khai th\u00e1c d\u01b0\u1ee3c th\u1ea3o t\u1ea1i huy\u1ec7n Ho\u00e0ng Su Ph\u00ec, t\u1ec9nh H\u00e0 Giang Characteristics of Dao ethnic households exploiting medicinal plants in Hoang Su Phi, Ha Giang province Nguy\u1ec5n Th\u1ecb Thu Huy\u1ec1n L\u00fd T\u00e0 N\u00e1i Ph\u1ea1m […]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[26,24,45],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/2290"}],"collection":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/users\/12"}],"replies":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/comments?post=2290"}],"version-history":[{"count":6,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/2290\/revisions"}],"predecessor-version":[{"id":2390,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/2290\/revisions\/2390"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/media?parent=2290"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/categories?post=2290"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/tags?post=2290"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}