{"id":1622,"date":"2019-08-19T15:02:04","date_gmt":"2019-08-19T08:02:04","guid":{"rendered":"http:\/\/vafs.gov.vn\/en\/?p=1622"},"modified":"2023-11-23T12:25:29","modified_gmt":"2023-11-23T05:25:29","slug":"vietnam-journal-of-forest-science-number-2-2019","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/en\/2019\/08\/vietnam-journal-of-forest-science-number-2-2019\/","title":{"rendered":"Vietnam Journal of Forest Science Number 2-2019"},"content":{"rendered":"

\"\"<\/a><\/p>\n

<\/a><\/a><\/a>T\u1ea0P CH\u00cd KHOA H\u1eccC L\u00c2M NGHI\u1ec6P S\u1ed0 2<\/strong> – <\/strong>201<\/strong>9<\/strong><\/p>\n

\u00a0<\/strong><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
1.<\/td>\nC\u00e1c lo\u00e0i th\u1ef1c v\u1eadt b\u1ecb \u0111e d\u1ecda \u1edf Khu b\u1ea3o t\u1ed3n thi\u00ean nhi\u00ean P\u00f9 Ho\u1ea1t, t\u1ec9nh Ngh\u1ec7 An<\/td>\nThreatened plant species in Pu Hoat Nature Reserve, Nghe An province<\/td>\nNguy\u1ec5n Danh H\u00f9ng
\nNguy\u1ec5n Th\u1ecb Ho\u00e0i Th\u01b0\u01a1ng
\nL\u00ea Th\u1ecb H\u01b0\u01a1ng
\nTr\u1ea7n Minh H\u1ee3i
\nNguy\u1ec5n Th\u00e0nh Chung
\n\u0110\u1ed7 Ng\u1ecdc \u0110\u00e0i<\/td>\n		3<\/td>\n<\/tr>\n
2.<\/td>\nNghi\u00ean c\u1ee9u t\u00ednh \u0111a d\u1ea1ng h\u1ecd g\u1eebng (Zingiberaceae) \u1edf V\u01b0\u1eddn Qu\u1ed1c gia B\u1ea1ch M\u00e3, t\u1ec9nh Th\u1eeba Thi\u00ean Hu\u1ebf<\/td>\nStudy on diversity of zingiberaceae in Bach Ma National Park, Thua Thien Hue province<\/td>\nL\u00ea Th\u1ecb H\u01b0\u01a1ng
\nNguy\u1ec5n Th\u1ecb Thu Huy\u1ec1n
\nTr\u1ecbnh Th\u1ecb H\u01b0\u01a1ng<\/td>\n		14<\/td>\n<\/tr>\n
3.<\/td>\nB\u01b0\u1edbc \u0111\u1ea7u nghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng h\u1eefu t\u00ednh lo\u00e0i B\u1ea3y l\u00e1 m\u1ed9t hoa (Paris polyphylla<\/em> var) t\u1ea1i Khu b\u1ea3o t\u1ed3n thi\u00ean nhi\u00ean T\u00e2y C\u00f4n L\u0129nh, huy\u1ec7n Ho\u00e0ng Su Ph\u00ec, t\u1ec9nh H\u00e0 Giang<\/td>\nResearch results on propagation of the seven leaves one flower (Paris polyphylla<\/em> var) in Tay Con Linh Natural Reservation, Hoang Su Phi district, Ha Giang province<\/td>\nNguy\u1ec5n Duy H\u01b0ng
\nL\u01b0u \u0110\u00e0m C\u01b0
\nH\u00e0 Minh T\u00e2m<\/td>\n		20<\/td>\n<\/tr>\n
4.<\/td>\nNghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng c\u00e2y S\u01a1n ta (Toxicodendron succedanea<\/em>) b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p nu\u00f4i c\u1ea5y m\u00f4<\/td>\nPropagation of lacquer tree (Toxicodendron succedanea<\/em>) by tissue culture method<\/td>\n\u0110\u1eb7ng Quang H\u01b0ng
\nC\u1ea5n Th\u1ecb Lan
\nNg\u00f4 \u0110\u1ee9c Nh\u1ea1c
\nHo\u00e0ng Nguy\u1ec5n Vi\u1ec7t Hoa
\nPh\u1ea1m V\u0103n Vi\u1ec7n<\/td>\n		28<\/td>\n<\/tr>\n
5.<\/td>\nB\u1ec7nh m\u1ee5c ru\u1ed9t Keo tai t\u01b0\u1ee3ng: Bi\u1ebfn d\u1ecb di truy\u1ec1n trong c\u00e1c kh\u1ea3o nghi\u1ec7m h\u1eadu th\u1ebf th\u1ebf h\u1ec7 2, \u1edf tu\u1ed5i 8 – 9<\/td>\nHeartrot of Acacia mangium<\/em>: Genetic variations in the second generartion progeny tests at age of 8-9 years<\/td>\nLa \u00c1nh D\u01b0\u01a1ng v\u00e0
\nPh\u00ed H\u1ed3ng H\u1ea3i <\/td>\n		35<\/td>\n<\/tr>\n
6.<\/td>\n\u1ea2nh h\u01b0\u1edfng c\u1ee7a ph\u00e2n b\u00f3n \u0111\u1ebfn sinh tr\u01b0\u1edfng c\u1ee7a r\u1eebng tr\u1ed3ng keo lai, Keo tai t\u01b0\u1ee3ng v\u00e0 Keo l\u00e1 tr\u00e0m 2 n\u0103m tu\u1ed5i \u1edf Thanh H\u00f3a<\/td>\nEffect of fertiliser application on growth of young Acacia mangium<\/em>, Acacia auriculiformis<\/em> and their hybrid in Thanh Hoa<\/td>\nNguy\u1ec5n Huy S\u01a1n
\nPh\u1ea1m \u0110\u00ecnh S\u00e2m
\nH\u1ed3 Trung L\u01b0\u01a1ng
\nHo\u00e0ng Th\u1ecb Nhung
\nV\u0169 Ti\u1ebfn L\u00e2m
\nCao V\u0103n L\u1ea1ng
\nPh\u1ea1m V\u0103n Vi\u1ec7n<\/td>\n		46<\/td>\n<\/tr>\n
7.<\/td>\n\u1ea2nh h\u01b0\u1edfng c\u1ee7a bi\u1ec7n ph\u00e1p l\u00e0m \u0111\u1ea5t \u0111\u1ebfn sinh tr\u01b0\u1edfng c\u1ee7a r\u1eebng tr\u1ed3ng Keo tai t\u01b0\u1ee3ng, Keo l\u00e1 tr\u00e0m v\u00e0 keo lai \u1edf C\u1ea9m Th\u1ee7y – Thanh H\u00f3a<\/td>\nThe effect of site preparation treatment to the growth of acacia hybrids, Acacia mangium<\/em>,
\nA. auriculiformis<\/em> plantation in Cam Thuy district – Thanh Hoa province<\/td>\n		Nguy\u1ec5n Huy S\u01a1n
\nH\u1ed3 Trung L\u01b0\u01a1ng
\nHo\u00e0ng Th\u1ecb Nhung
\nV\u0169 Ti\u1ebfn L\u00e2m
\nPh\u1ea1m \u0110\u00ecnh S\u00e2m
\nPh\u1ea1m V\u0103n Vi\u1ec7nPh\u00f9ng Nhu\u1ec7 Giang<\/td>\n		55<\/td>\n<\/tr>\n
8.<\/td>\nNghi\u00ean c\u1ee9u hi\u1ec7n tr\u1ea1ng g\u00e2y tr\u1ed3ng c\u00e2y S\u01b0a t\u1ea1i ph\u00eda B\u1eafc Vi\u1ec7t Nam<\/td>\nCultivation of Dalbergia tonkinensis<\/em> in North Vietnam<\/td>\nN\u00f4ng Ph\u01b0\u01a1ng Nhung
\nPh\u1ea1m Quang Thu
\nBernard Dell
\nNguy\u1ec5n Minh Ch\u00ed<\/td>\n		64<\/td>\n<\/tr>\n
9.<\/td>\nX\u00e1c \u0111\u1ecbnh tu\u1ed5i khai th\u00e1c t\u1ed1i \u01b0u cho r\u1eebng tr\u1ed3ng Keo tai t\u01b0\u1ee3ng t\u1ea1i t\u1ec9nh Th\u00e1i Nguy\u00ean<\/td>\nDetermination of optimum rotation age for Acacia mangium<\/em> plantations in Thai Nguyen province, Vietnam<\/td>\nNguy\u1ec5n \u0110\u0103ng C\u01b0\u1eddng
\nCao Thi\u0323 Thu Hi\u00ea\u0300n
\nB\u00f9i M\u1ea1nh H\u01b0ng
\nNguy\u1ec5n V\u0103n B\u00edch<\/td>\n		78<\/td>\n<\/tr>\n
10.<\/td>\nNghi\u00ean c\u1ee9u sinh kh\u1ed1i v\u00e0 c\u00e1c bon t\u00edch l\u0169y trong c\u00e2y c\u00e1 l\u1ebb lu\u1ed3ng (Dendrocalamus <\/em>barbatus<\/em>) t\u1ea1i t\u1ec9nh Thanh H\u00f3a<\/td>\nStudy of biomass and carbon stock of Dendrocalamus barbatus<\/em> species in Thanh Hoa province<\/td>\nNguy\u1ec5n \u0110\u1ee9c H\u1ea3i
\nNguy\u1ec5n Ho\u00e0ng Ti\u1ec7p<\/td>\n		89<\/td>\n<\/tr>\n
11.<\/td>\nPh\u00e2n t\u00edch thay \u0111\u1ed5i th\u1ea3m ph\u1ee7 d\u1ef1a v\u00e0o \u1ea3nh v\u1ec7 tinh \u0111a th\u1eddi gian v\u00e0 chu\u1ed7i Markov t\u1ea1i t\u1ec9nh \u0110\u1eafk N\u00f4ng<\/td>\nAnalysis of land use\/land cover change in Dak Nong province using multitemporal satellite images and Markov<\/td>\nNguy\u00ea\u0303n Thi\u0323 Thanh H\u01b0\u01a1ng
\nNg\u00f4 Thi\u0323 Thu\u0300y Ph\u01b0\u01a1ng<\/td>\n		101<\/td>\n<\/tr>\n
12.<\/td>\nT\u00e1c \u0111\u1ed9ng c\u1ee7a ch\u00ednh s\u00e1ch l\u00e2m nghi\u1ec7p \u0111\u1ebfn m\u1ed1i quan h\u1ec7 gi\u1eefa t\u00e0i nguy\u00ean r\u1eebng v\u00e0 sinh k\u1ebf c\u1ed9ng \u0111\u1ed3ng d\u00e2n t\u1ed9c thi\u1ec3u s\u1ed1 v\u00f9ng T\u00e2y Nguy\u00ean<\/td>\nImpact of forestry policies on the relationship between forest resources and livelihood of ethnic minority communities in the Central Highlands of
\nViet Nam<\/td>\n		B\u1ea3o Huy<\/td>\n113<\/td>\n<\/tr>\n
13.<\/td>\n\u0110\u00e1nh gi\u00e1 \u0111\u1ed9 b\u1ec1n t\u1ef1 nhi\u00ean c\u1ee7a g\u1ed7 B\u1eddi l\u1eddi v\u00e0ng (Litsea pierrei<\/em> Lecomte) v\u00e0 D\u1ebb \u0111\u1ecf (Lithocarpus ducampii<\/em> A. Camus) v\u1edbi c\u00e1c sinh v\u1eadt g\u00e2y h\u1ea1i ch\u00ednh trong \u0111i\u1ec1u ki\u1ec7n ph\u00f2ng th\u00ed nghi\u1ec7m<\/td>\nInvestigation on natural durability of Vietnamese broad wood species (Litsea pierrei<\/em> Lecomte and Lithocarpus ducampii<\/em>
\nA. Camus) with main pest organisms in laboratory conditions<\/td>\n		V\u00f5 \u0110\u1ea1i H\u1ea3i
\nB\u00f9i Th\u1ecb Th\u1ee7y
\nHo\u00e0ng Th\u1ecb T\u00e1m
\n\u0110o\u00e0n Th\u1ecb B\u00edch Ng\u1ecdc Nguy\u1ec5n Th\u1ecb H\u1eb1ng
\nNguy\u1ec5n V\u0103n \u0110\u1ee9c<\/td>\n		129<\/td>\n<\/tr>\n
14.<\/td>\n\u1ea2nh h\u01b0\u1edfng c\u1ee7a th\u00f4ng s\u1ed1 ng\u00e2m t\u1ea9m keo cho lu\u1ed3ng \u0111\u1ebfn ch\u1ea5t l\u01b0\u1ee3ng tre \u00e9p kh\u1ed1i l\u00e0m v\u1eadt li\u1ec7u x\u00e2y d\u1ef1ng<\/td>\nEffects of paramets of soaking bamboo in the glue to quality pressed bamboo construction materials<\/td>\nNguy\u1ec5n Quang Trung
\nNguy\u1ec5n Th\u1ecb Ph\u01b0\u1ee3ng
\nPh\u1ea1m Th\u1ecb Thanh Mi\u1ec1n<\/td>\n		138<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>C\u00c1C LO\u00c0I TH\u1ef0C V\u1eacT B\u1eca \u0110E D\u1eccA \u1ede KHU B\u1ea2O T\u1ed2N THI\u00caN NHI\u00caN P\u00d9 HO\u1ea0T, T\u1ec8NH NGH\u1ec6 AN<\/p>\n

<\/a>Nguy\u1ec5n Danh H\u00f9ng1<\/sup>, Nguy\u1ec5n Th\u1ecb Ho\u00e0i Th\u01b0\u01a1ng2<\/sup>, L\u00ea Th\u1ecb H\u01b0\u01a1ng2<\/sup>,
\nTr\u1ea7n Minh H\u1ee3i3<\/sup>, Nguy\u1ec5n Th\u00e0nh Chung1<\/sup>, \u0110\u1ed7 Ng\u1ecdc \u0110\u00e0i4<\/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
\n2<\/sup>Vi\u1ec7n S\u01b0 ph\u1ea1m T\u1ef1 nhi\u00ean, Tr\u01b0\u1eddng \u0111\u1ea1i h\u1ecdc Vinh
\n3<\/sup>Vi\u1ec7n Sinh th\u00e1i v\u00e0 T\u00e0i nguy\u00ean Sinh v\u1eadt, Vi\u1ec7n H\u00e0n l\u00e2m Khoa h\u1ecdc v\u00e0 C\u00f4ng ngh\u1ec7 Vi\u1ec7t Nam
\n4<\/sup>Khoa N\u00f4ng L\u00e2m Ng\u01b0, Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc Kinh t\u1ebf Ngh\u1ec7 An<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

C\u00e1c lo\u00e0i th\u1ef1c v\u1eadt b\u1ecb \u0111e d\u1ecda \u1edf Khu B\u1ea3o t\u1ed3n Thi\u00ean nhi\u00ean P\u00f9 Ho\u1ea1t \u0111\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c 129 lo\u00e0i, 88 chi v\u00e0 54 h\u1ecd c\u1ee7a 3 ng\u00e0nh (Polypodiophyta, Pinophyta and Magnoliophyta). \u1ede P\u00f9 Ho\u1ea1t c\u00f3 112 lo\u00e0i \u0111\u01b0\u1ee3c ghi trong S\u00e1ch \u0110\u1ecf Vi\u1ec7t Nam (2007), 25 lo\u00e0i trong Ngh\u1ecb \u0111\u1ecbnh 06\/2019\/N\u0110-CP v\u00e0 15 lo\u00e0i trong IUCN – 2017. C\u00e1c lo\u00e0i b\u1ecb \u0111e d\u1ecda tuy\u1ec7t ch\u1ee7ng thu\u1ed9c 5 nh\u00f3m gi\u00e1 tr\u1ecb s\u1eed d\u1ee5ng ch\u00ednh l\u00e0 nh\u00f3m c\u00e2y l\u00e0m thu\u1ed1c v\u1edbi 67 lo\u00e0i, nh\u00f3m c\u00e2y cho g\u1ed7 52 lo\u00e0i, nh\u00f3m c\u00e2y l\u00e0m c\u1ea3nh 19 lo\u00e0i, nh\u00f3m c\u00e2y cho tinh d\u1ea7u 19 lo\u00e0i, nh\u00f3m c\u00e2y \u0103n \u0111\u01b0\u1ee3c v\u1edbi 13 lo\u00e0i.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> B\u1ea3o t\u1ed3n Thi\u00ean nhi\u00ean, P\u00f9 Ho\u1ea1t, lo\u00e0i \u0111e d\u1ecda, Ngh\u1ec7 An<\/td>\n<\/tr>\n

<\/a>Threatened plant species in Pu Hoat Nature Reserve, Nghe An province<\/strong><\/p>\n

The threatened species in the Pu Hoat Nature Reserve, Nghe An province, was identified with 129 species, 88 genera and 54 families of the 3 phyllum (Polypodiophyta, Pinophyta and Magnoliophyta). In Pu Hoat Nature Reserve there are 112 threatened species listed in the Red Data Book of Viet Nam (2007), 25 species in Decree 06\/2019\/N\u0110-CP by Government (2019) and 15 species listed in the IUCN Red List (2017). The number of useful plant species of the threatened species in the Pu Hoat flora is categorized as follows: 67 species for medicinal, 52 species for timber, 19 species for ornamental, 19 species for essential oil, 13 species edible.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> B\u1ea3o t\u1ed3n Thi\u00ean nhi\u00ean, P\u00f9 Ho\u1ea1t, lo\u00e0i \u0111e d\u1ecda, Ngh\u1ec7 An<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U T\u00cdNH \u0110A D\u1ea0NG H\u1ecc G\u1eeaNG (ZINGIBERACEAE) \u1ede V\u01af\u1edcN QU\u1ed0C GIA B\u1ea0CH M\u00c3, T\u1ec8NH TH\u1eeaA THI\u00caN HU\u1ebe<\/p>\n

<\/a>L\u00ea Th\u1ecb H\u01b0\u01a1ng1,*<\/sup>, Nguy\u1ec5n Th\u1ecb Thu Huy\u1ec1n2<\/sup>, Tr\u1ecbnh Th\u1ecb H\u01b0\u01a1ng2<\/sup><\/p>\n

1 <\/sup>Vi\u1ec7n S\u01b0 ph\u1ea1m T\u1ef1 nhi\u00ean, Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc Vinh
\n2 <\/sup>Khoa Khoa h\u1ecdc T\u1ef1 nhi\u00ean, Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc H\u1ed3ng \u0110\u1ee9c<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Nghi\u00ean c\u1ee9u v\u1ec1 t\u00ednh \u0111a d\u1ea1ng c\u1ee7a h\u1ecd G\u1eebng (Zingiberaceae) \u1edf V\u01b0\u1eddn Qu\u1ed1c gia B\u1ea1ch M\u00e3, t\u1ec9nh Th\u1eeba Thi\u00ean Hu\u1ebf \u0111\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c 13 chi, 47 lo\u00e0i, trong \u0111\u00f3 b\u1ed5 sung 7 chi v\u00e0 33 lo\u00e0i cho danh l\u1ee5c th\u1ef1c v\u1eadt VQG B\u1ea1ch M\u00e3 \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00f4ng b\u1ed1 v\u00e0o n\u0103m 2003 v\u00e0 2008. C\u00e1c lo\u00e0i c\u00e2y h\u1ecd G\u1eebng \u1edf khu v\u1ef1c nghi\u00ean c\u1ee9u c\u00f3 c\u00e1c gi\u00e1 tr\u1ecb s\u1eed d\u1ee5ng kh\u00e1c nhau, 37 lo\u00e0i cho tinh d\u1ea7u, 29 lo\u00e0i l\u00e0m thu\u1ed1c, 7 lo\u00e0i l\u00e0m gia v\u1ecb, 3 lo\u00e0i l\u00e0m c\u1ea3nh v\u00e0 2 lo\u00e0i \u0103n \u0111\u01b0\u1ee3c. H\u1ecd G\u1eebng \u1edf khu v\u1ef1c nghi\u00ean c\u1ee9u c\u00f3 3 y\u1ebfu t\u1ed1 \u0111\u1ecba l\u00fd, y\u1ebfu t\u1ed1 nhi\u1ec7t \u0111\u1edbi chi\u1ebfm 61,72%; y\u1ebfu t\u1ed1 \u0111\u1eb7c h\u1eefu chi\u1ebfm 36,17% v\u00e0 y\u1ebfu t\u1ed1 \u00f4n \u0111\u1edbi chi\u1ebfm 2,13%.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> B\u1ea3o t\u1ed3n Thi\u00ean nhi\u00ean, P\u00f9 Ho\u1ea1t, lo\u00e0i \u0111e d\u1ecda, Ngh\u1ec7 An<\/td>\n<\/tr>\n

<\/a>Study on diversity of Zingiberaceae in Bach Ma National Park, Thua Thien Hue province<\/strong><\/p>\n

Study on diversity of Zingiberaceae in Bach Ma National Park, Thua Thien Hue province, identified 47 species belonging to 13 genera, of wich 7 genera and 33 species found as new record for the plant list of Bach Ma published in 2003 and 2008. The number of useful plant species of the Zingiberaceae is categorized as follows: 37 species supply essential oil, 29 species as medicinal plants, 7 species for spice, 3 species for ornamental purpose and 2 edible species. The Zingiberaceae in Bach Ma are mainly comprised of the tropical element (61.72%), endemic element (36.17%) and temperate element (2.13%).<\/p>\n

Keywords:<\/em><\/strong> Bach Ma, diversity, Zingiberaceae,
\nThua Thien Hue, National Park<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>B\u01af\u1edaC \u0110\u1ea6U NGHI\u00caN C\u1ee8U NH\u00c2N GI\u1ed0NG H\u1eeeU T\u00cdNH
\nLO\u00c0I B\u1ea2Y L\u00c1 M\u1ed8T HOA (Paris polyphylla<\/em> Var) T\u1ea0I KHU B\u1ea2O T\u1ed2N THI\u00caN NHI\u00caN T\u00c2Y C\u00d4N L\u0128NH, HUY\u1ec6N HO\u00c0NG SU PH\u00cc, T\u1ec8NH H\u00c0 GIANG<\/p>\n

<\/a>Nguy\u1ec5n Duy H\u01b0ng1<\/sup>*4<\/sup>, L\u01b0u \u0110\u00e0m C\u01b02<\/sup>, H\u00e0 Minh T\u00e2m3<\/sup><\/p>\n

[1]* H\u1ecdc vi\u1ec7n Khoa h\u1ecdc v\u00e0 C\u00f4ng ngh\u1ec7 Vi\u1ec7t Nam
\n2 B\u1ea3o t\u00e0ng Thi\u00ean Nhi\u00ean Vi\u1ec7t Nam
\n3<\/sup> Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc S\u01b0 ph\u1ea1m H\u00e0 N\u1ed9i 2
\n4 Tr\u01b0\u1eddng THPT H\u00f9ng An<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

B\u00e0i b\u00e1o tr\u00ecnh b\u00e0y m\u1ed9t s\u1ed1 k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng h\u1eefu t\u00ednh lo\u00e0i B\u1ea3y l\u00e1 m\u1ed9t hoa (Paris polyphylla <\/em>Var.) \u1edf Khu b\u1ea3o t\u1ed3n thi\u00ean nhi\u00ean T\u00e2y C\u00f4n L\u0129nh, huy\u1ec7n Ho\u00e0ng Su Ph\u00ec, t\u1ec9nh H\u00e0 Giang, cho th\u1ea5y th\u1eddi gian thu h\u00e1i qu\u1ea3 t\u1ed1t nh\u1ea5t l\u00e0 v\u00e0o th\u00e1ng 10 \u0111\u1ebfn th\u00e1ng 11. H\u1ea1t c\u00e2y B\u1ea3y l\u00e1 m\u1ed9t hoa c\u00f3 \u0111\u01b0\u1eddng k\u00ednh trung b\u00ecnh l\u00e0 0,265 cm; tr\u1ecdng l\u01b0\u1ee3ng trung b\u00ecnh c\u1ee7a 1 h\u1ea1t l\u00e0 0,143 g; \u0111\u1ed9 \u1ea9m trong h\u1ea1t trung b\u00ecnh l\u00e0 30,47%; tr\u1ecdng l\u01b0\u1ee3ng 1.000 h\u1ea1t trung b\u00ecnh l\u00e0 143 g, dao \u0111\u1ed9ng t\u1eeb 125 – 161 g; 1 kg h\u1ea1t gi\u1ed1ng thu\u1ea7n trung b\u00ecnh c\u00f3 6.993 h\u1ea1t, dao \u0111\u1ed9ng t\u1eeb 6.211 – 8.000 h\u1ea1t. H\u1ea1t gi\u1ed1ng \u0111\u01b0\u1ee3c x\u1eed l\u00fd b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p h\u00f3a h\u1ecdc, ng\u00e2m h\u1ea1t trong dung d\u1ecbch GA3 (200 ppm) cho t\u1ef7 l\u1ec7 n\u1ea3y cao nh\u1ea5t, \u0111\u1ea1t 83%. Sau 12 th\u00e1ng \u01b0\u01a1m trong v\u01b0\u1eddn v\u1edbi h\u1ed7n h\u1ee3p ru\u1ed9t b\u1ea7u g\u1ed3m 80% \u0111\u1ea5t m\u00e0u + 20% ph\u00e2n vi sinh, c\u00e2y con sinh tr\u01b0\u1edfng t\u1ed1t nh\u1ea5t v\u1edbi t\u1ef7 l\u1ec7 s\u1ed1ng \u0111\u1ea1t 83% v\u00e0 chi\u1ec1u cao trung b\u00ecnh \u0111\u1ea1t 55,1cm.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Nh\u00e2n gi\u1ed1ng h\u1eefu t\u00ednh, Paris polyphylla<\/em> Var,
\nH\u00e0 Giang<\/td>\n<\/tr>\n

<\/a>Research results on propagation of the seven leaves one flower (Paris polyphylla<\/em> var) in Tay Con Linh natural reservation, Hoang Su Phi district, Ha Giang province<\/strong><\/p>\n

The article shows a number of research results on propagation of the seven leaves one flower (Paris polyphylla<\/em> Var) in Tay Con Linh Natural Reservation, Hoang Su Phi district, Ha Giang province, showing the best harvesting time is in the October to November. They have got 0.265 cm of diameter, 0.143 g of weight, water content 30.47%, weight ranging from 125 – 161 g; 1 kg of pure seeds has an average of 6,993 seeds, ranging from 6,211 – 8,000 seeds, seeds are treated by chemical method CTTN 5, soaked seeds in GA3 solution (200 ppm) give the germination rate (83%). The seeds after germination are grown in the soil of mixture 80% soil sample + 20% microbial fertilizer gives the highest rate of live plants (82%), average height after 12 months reaches 55.1 cm.<\/p>\n

Keywords:<\/em><\/strong> To sexual breeding Paris polyphylla<\/em> Var,
\nHa Giang<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U NH\u00c2N GI\u1ed0NG C\u00c2Y S\u01a0N TA (Toxicodendron succedanea) <\/em>B\u1eb0NG PH\u01af\u01a0NG PH\u00c1P NU\u00d4I C\u1ea4Y M\u00d4<\/p>\n

<\/a>\u0110\u1eb7ng Quang H\u01b0ng1*4<\/sup>, C\u1ea5n Th\u1ecb Lan2<\/sup>, Ng\u00f4 \u0110\u1ee9c Nh\u1ea1c1<\/sup>,
\n<\/sup>Ho\u00e0ng Nguy\u1ec5n Vi\u1ec7t Hoa3<\/sup>, Ph\u1ea1m V\u0103n Vi\u1ec7n3<\/sup><\/p>\n

1* <\/sup>Trung t\u00e2m Khoa h\u1ecdc L\u00e2m nghi\u1ec7p \u0110\u00f4ng B\u1eafc B\u1ed9
\n2<\/sup> Trung t\u00e2m Th\u1ef1c nghi\u1ec7m v\u00e0 Chuy\u1ec3n giao Gi\u1ed1ng –
\nVi\u1ec7n Nghi\u00ean c\u1ee9u Gi\u1ed1ng v\u00e0 C\u00f4ng ngh\u1ec7 sinh h\u1ecdc L\u00e2m nghi\u1ec7p
\n3<\/sub> Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

C\u00e2y S\u01a1n ta (Toxicodendron succedanea<\/em>) cho nh\u1ef1a qu\u00fd v\u00e0 \u0111\u1ed9c \u0111\u00e1o, l\u00e0 c\u00e2y c\u00f3 gi\u00e1 tr\u1ecb kinh t\u1ebf cao \u1edf Vi\u1ec7t Nam. Nh\u1ef1a c\u1ee7a c\u00e2y S\u01a1n ta ph\u1ee5c v\u1ee5 cho c\u00f4ng nghi\u1ec7p – ti\u1ec3u th\u1ee7 c\u00f4ng nghi\u1ec7p, \u0111\u1eb7c bi\u1ec7t \u0111\u1ec3 duy tr\u00ec v\u00e0 ph\u00e1t tri\u1ec3n ngh\u1ec1 s\u01a1n m\u00e0i truy\u1ec1n th\u1ed1ng \u0111\u1ed9c \u0111\u00e1o c\u1ee7a Vi\u1ec7t Nam s\u1ea3n xu\u1ea5t ra c\u00e1c m\u1eb7t h\u00e0ng xu\u1ea5t kh\u1ea9u \u0111\u1eb7c th\u00f9 \u0111\u1ecba l\u00fd c\u00f3 l\u1ee3i th\u1ebf c\u1ea1nh tranh cao. Nghi\u00ean c\u1ee9u n\u00e0y nh\u1eb1m t\u00ecm ra ph\u01b0\u01a1ng ph\u00e1p nh\u00e2n gi\u1ed1ng b\u1eb1ng nu\u00f4i c\u1ea5y m\u00f4 t\u1ea1o ra h\u00e0ng lo\u1ea1t gi\u1ed1ng c\u00e2y S\u01a1n ta ch\u1ea5t l\u01b0\u1ee3ng cao ch\u1ee7 \u0111\u1ed9ng ngu\u1ed3n gi\u1ed1ng \u0111\u1ec3 ph\u00e1t tri\u1ec3n lo\u00e0i c\u00e2y n\u00e0y. V\u1eadt li\u1ec7u nghi\u00ean c\u1ee9u \u0111\u01b0\u1ee3c l\u1ea5y t\u1eeb c\u1ea5y S\u01a1n ta 9 – 12 th\u00e1ng tu\u1ed5i v\u1edbi m\u1eabu b\u00e1nh t\u1ebb (m\u1eabu h\u00f3a g\u1ed7 1\/2 di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t c\u1eaft c\u1ee7a m\u1eabu) v\u00e0 m\u1eabu gi\u00e0 (m\u1eabu h\u00f3a g\u1ed7 2\/3 di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t c\u1eaft c\u1ee7a m\u1eabu). K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u b\u01b0\u1edbc \u0111\u1ea7u ch\u1ec9 ra r\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p kh\u1eed tr\u00f9ng t\u1ed1t nh\u1ea5t khi x\u1eed l\u00fd m\u1eabu nu\u00f4i c\u1ea5y c\u1ee7a c\u00e2y S\u01a1n ta l\u00e0 khi s\u1eed d\u1ee5ng HgCl2<\/sub> n\u1ed3ng \u0111\u1ed9 0,1% v\u1edbi th\u1eddi gian 4 ph\u00fat cho m\u1eabu b\u00e1nh t\u1ebb v\u00e0 5 ph\u00fat cho m\u1eabu gi\u00e0, ph\u01b0\u01a1ng ph\u00e1p kh\u1eed tr\u00f9ng t\u1ed1t nh\u1ea5t cho t\u1ef7 l\u1ec7 b\u1eadt ch\u1ed3i h\u1eefu hi\u1ec7u \u0111\u1ea1t 20,27 – 44,16%, t\u1ef7 l\u1ec7 nhi\u1ec5m d\u01b0\u1edbi 50%. M\u00f4i tr\u01b0\u1eddng t\u00e1i sinh ch\u1ed3i ph\u00f9 h\u1ee3p nh\u1ea5t l\u00e0 m\u00f4i tr\u01b0\u1eddng MS* +0,5g\/l than ho\u1ea1t t\u00ednh (3,01 ch\u1ed3i \/c\u1ee5m v\u00e0 chi\u1ec1u cao ch\u1ed3i l\u00e0: 1,58 cm). M\u00f4i tr\u01b0\u1eddng MS* b\u1ed5 sung 1,5 mg\/l BAP v\u00e0 0,5 g\/l than ho\u1ea1t t\u00ednh l\u00e0 m\u00f4i tr\u01b0\u1eddng th\u00edch h\u1ee3p \u0111\u1ec3 nh\u00e2n nhanh s\u1ed1 l\u01b0\u1ee3ng ch\u1ed3i cho c\u00e2y S\u01a1n ta d\u00f2ng A.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> M\u00f4i tr\u01b0\u1eddng kh\u1eed tr\u00f9ng, c\u00e2y S\u01a1n ta, nu\u00f4i c\u1ea5y m\u00f4<\/td>\n<\/tr>\n

<\/a>Propagation of Lacquer tree (Toxicodendron succedanea<\/em>) by tissue culture method<\/strong><\/p>\n

Lacquer tree is the multi – purpose tree, a high economic valuable tree in Vietnam. This study aims to find the most propagation method of T.succedanea<\/em> species by invitro – tissue culture. The tissue culture is a vegetative propagating method; it is effective solution can produce series seedling – tree as good and uniform quality with a root system like the seedling tree growing from seed. The materials used for tissue culture from the lacquer tree 9 – 12 months ages have been making be tree shoots in the nursery and the experiment conducts in artificial conditions. Two different specimen of lacquer tree: the juvenile shoots (neither old nor young which has 1\/2 parts become woody) and the old shoots which are in lignified process (has 2\/3 parts become woody) and three different nutrient media were used in this experiment. Results showed that using 0.1% concentration HgCl2<\/sub> in 4 minutes for juvenile shoots is the best – sterilized method in tissue culture of T.succedanea.<\/em> The Sprouting buds rate to reach 20.27 – 44.16%; the infection explants rate less 50%. The suitable regeneration buds medium is MS* + 0.5g\/l Activated carbon medium (3.01 buds\/clump and buds length: 1.58 cm). The proper rapid multiplication buds medium is MS* medium to supplement 1.5 mg\/l BAP + 0.5 g\/l activated carbon.<\/p>\n

Keywords:<\/em><\/strong> Sterilize medium, Toxicodendron succecdanea<\/em>, tissue culture<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>B\u1ec6NH M\u1ee4C RU\u1ed8T KEO TAI T\u01af\u1ee2NG: BI\u1ebeN D\u1eca DI TRUY\u1ec0N TRONG C\u00c1C KH\u1ea2O NGHI\u1ec6M H\u1eacU TH\u1ebe TH\u1ebe H\u1ec6 2, \u1ede TU\u1ed4I 8 – 9<\/p>\n

<\/a>La \u00c1nh D\u01b0\u01a1ng v\u00e0 Ph\u00ed H\u1ed3ng H\u1ea3i<\/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

Nghi\u00ean c\u1ee9u bi\u1ebfn d\u1ecb v\u1ec1 t\u1ef7 l\u1ec7, m\u1ee9c \u0111\u1ed9 m\u1ee5c ru\u1ed9t Keo tai t\u01b0\u1ee3ng theo ph\u01b0\u01a1ng ph\u00e1p m\u1edbi b\u1eb1ng s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb ArborSonic 3D \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh tr\u00ean 3 kh\u1ea3o nghi\u1ec7m h\u1eadu th\u1ebf th\u1ebf h\u1ec7 2 t\u1ea1i Ba V\u00ec – H\u00e0 N\u1ed9i, Qu\u1ef3 H\u1ee3p – Ngh\u1ec7 An v\u00e0 B\u00e0u B\u00e0ng – B\u00ecnh D\u01b0\u01a1ng, tu\u1ed5i 8 – 9. K\u1ebft qu\u1ea3 cho th\u1ea5y t\u01b0\u01a1ng quan m\u1ee9c \u0111\u1ed9 m\u1ee5c ru\u1ed9t theo thi\u1ebft b\u1ecb ArborSonic 3D v\u00e0 theo ph\u01b0\u01a1ng ph\u00e1p c\u1ee7a Caroline (2006) c\u0169ng c\u00f3 t\u01b0\u01a1ng quan ch\u1eb7t (r = 0,77). Nh\u01b0 v\u1eady c\u00f3 th\u1ec3 d\u00f9ng thi\u1ebft b\u1ecb ArborSonic 3D \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh nhanh b\u1ec7nh m\u1ee5c ru\u1ed9t v\u1edbi \u0111\u1ed9 tin c\u1eady cao. D\u1ef1 \u0111o\u00e1n c\u00e1c gi\u00e1 tr\u1ecb di truy\u1ec1n cho 3 kh\u1ea3o nghi\u1ec7m h\u1eadu th\u1ebf cho th\u1ea5y h\u1ec7 s\u1ed1 di truy\u1ec1n b\u1ec7nh m\u1ee5c ru\u1ed9t \u0111\u1ec1u \u1edf m\u1ee9c th\u1ea5p, dao \u0111\u1ed9ng t\u1eeb 0,14 \u0111\u1ebfn 0,23, nh\u01b0ng h\u1ec7 s\u1ed1 bi\u1ebfn \u0111\u1ed9ng di truy\u1ec1n l\u0169y t\u00edch l\u1ea1i kh\u00e1 l\u1edbn, t\u1eeb 10,8 \u0111\u1ebfn 24,5%. T\u01b0\u01a1ng quan di truy\u1ec1n gi\u1eefa m\u1ee9c \u0111\u1ed9 m\u1ee5c ru\u1ed9t v\u1edbi m\u1ed9t s\u1ed1 t\u00ednh ch\u1ea5t c\u01a1 l\u00fd g\u1ed7 c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t. Kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang g\u1ed7 v\u00e0 t\u1ef7 s\u1ed1 co r\u00fat theo 2 chi\u1ec1u ti\u1ebfp tuy\u1ebfn v\u00e0 xuy\u00ean t\u00e2m c\u00f3 t\u01b0\u01a1ng quan \u00e2m, \u1edf m\u1ee9c \u0111\u1ed9 trung b\u00ecnh \u0111\u1ebfn r\u1ea5t ch\u1eb7t (-0,47 \u0111\u1ebfn -0,75), \u0111\u1ed9 b\u1ec1n u\u1ed1n t\u0129nh (MoEd) c\u00f3 t\u01b0\u01a1ng quan d\u01b0\u01a1ng y\u1ebfu v\u1edbi m\u1ee9c \u0111\u1ed9 m\u1ee5c ru\u1ed9t, v\u1edbi h\u1ec7 s\u1ed1 t\u01b0\u01a1ng quan y\u1ebfu (0,21-0,37), \u0111\u1ed9 b\u1ec1n \u0111\u1ee9t g\u00e3y (Morl) c\u00f3 t\u01b0\u01a1ng quan ch\u1eb7t d\u01b0\u01a1ng v\u00e0 ch\u1eb7t v\u1edbi t\u1ef7 l\u1ec7 v\u00e0 m\u1ee9c \u0111\u1ed9 m\u1ee5c ru\u1ed9t (h\u1ec7 s\u1ed1 t\u01b0\u01a1ng quan 0,51 v\u00e0 0,64). T\u01b0\u01a1ng quan ki\u1ec3u gen – ho\u00e0n c\u1ea3nh b\u1ec7nh m\u1ee5c ru\u1ed9t gi\u1eefa hai l\u1eadp \u0111\u1ecba n\u00e0y l\u00e0 r\u1ea5t th\u1ea5p v\u00e0 c\u00f3 \u00fd ngh\u0129a hay n\u00f3i c\u00e1ch kh\u00e1c c\u00e1c t\u00ednh tr\u1ea1ng ch\u1ecbu \u1ea3nh h\u01b0\u1edfng m\u1ea1nh c\u1ee7a t\u01b0\u01a1ng t\u00e1c ki\u1ec3u gen – ho\u00e0n c\u1ea3nh.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> T\u1eeb kh\u00f3a: Keo tai t\u01b0\u1ee3ng, kh\u1ea3o nghi\u1ec7m h\u1eadu th\u1ebf th\u1ebf h\u1ec7 2, thi\u1ebft b\u1ecb ArborSonic 3D, b\u1ec7nh m\u1ee5c ru\u1ed9t, h\u1ec7 s\u1ed1 di truy\u1ec1n, t\u01b0\u01a1ng t\u00e1c ki\u1ec3u gen – ho\u00e0n c\u1ea3nh<\/td>\n<\/tr>\n

<\/a>Heartrot of Acacia mangium<\/em>: Genetic variations in the second generartion progeny tests at age of 8-9 years<\/strong><\/p>\n

Study on genetic variation in heartrot percentage and disease index was carried out by using ArborSonic 3D machine in 3 second generation progeny tests in Ba Vi – Ha Noi, Quy Hop – Nghe An and Bau Bang – Binh Duong, at age of 8 – 9 years; The correlation of heartrot percentages evaluated between ArborSonic 3D equipment and Caroline method (2006) were close (r = 0,77) respectively. In consequence, ArborSonic 3D can be used to quickly identify heartrot disease with high confidence. Predicting the genetic parameters for the 3 progeny tests indicated narrow-sense heritabilities of heartrot percentage and heartrot index were low, ranging from 0.14 to 0.23, but coefficients of additive genetic variation (CVa<\/sub>) of them were high, from 10.8 to 24.5%. The substantial coefficients of additive genetic variation and significant heritabilities for heartrot percentage and heartrot index indicate that considerable potential for improvement in heartrot percentage and heartrot index through selecting among superior individuals within families of A. mangium<\/em>. Genetic correlation (Rg) between heartrot index and density, and shrinkage ratios in both tangential and radial directions were negative and significantly different from zero (ranged from -0.47 to -0.75). Heartrot index also correlated positively and weakly with dynamic modulus of elasticity (Rg=0.21-0.37). In contrast, heartrot index positively and strongly correlated with wood strength (Rg=0.51-0.64). The site-site genetic correlations between Ba Vi, Quy Hop and Bau Bang were low for growth traits and heartrot index indicating that G x E effects are of practical importance for growth and heartrot index and different deployment populations will be required for different sites.<\/p>\n

Keywords:<\/em><\/strong> Acacia mangium,<\/em> 2nd generation test, ArborSonic 3D, heartrot, wood properties, heritability, GxE interaction<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u1ea2NH H\u01af\u1edeNG C\u1ee6A PH\u00c2N B\u00d3N \u0110\u1ebeN SINH TR\u01af\u1edeNG C\u1ee6A R\u1eeaNG TR\u1ed2NG KEO LAI, KEO TAI T\u01af\u1ee2NG V\u00c0 KEO L\u00c1 TR\u00c0M 2 N\u0102M TU\u1ed4I \u1ede THANH H\u00d3A<\/p>\n

<\/a>Nguy\u1ec5n Huy S\u01a1n, Ph\u1ea1m \u0110\u00ecnh S\u00e2m, H\u1ed3 Trung L\u01b0\u01a1ng, Ho\u00e0ng Th\u1ecb Nhung, V\u0169 Ti\u1ebfn L\u00e2m, Cao V\u0103n L\u1ea1ng, Ph\u1ea1m V\u0103n Vi\u1ec7n<\/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

Keo lai (Acacia hybrids), Keo tai t\u01b0\u1ee3ng (A. mangium<\/em>) v\u00e0 Keo l\u00e1 tr\u00e0m (A. auriculifomis<\/em>) l\u00e0 nh\u1eefng lo\u00e0i c\u00e2y tr\u1ed3ng ch\u1ee7 l\u1ef1c c\u1ee7a ng\u00e0nh L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam trong nh\u1eefng n\u0103m v\u1eeba qua v\u00e0 hi\u1ec7n nay. B\u00f3n ph\u00e2n cho r\u1eebng tr\u1ed3ng c\u00e1c lo\u00e0i c\u00e2y n\u00e0y l\u00e0 m\u1ed9t trong nh\u1eefng bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt th\u00e2m canh nh\u1eb1m n\u00e2ng cao n\u0103ng su\u1ea5t ch\u1ea5t l\u01b0\u1ee3ng r\u1eebng tr\u1ed3ng. \u0110\u1ea5t \u1edf khu v\u1ef1c th\u00ed nghi\u1ec7m \u1edf huy\u1ec7n C\u1ea9m Th\u1ee7y, t\u1ec9nh Thanh H\u00f3a, \u0111\u1ed9 pHKCl<\/sub> t\u1eeb 4,52 – 4,66, h\u00e0m l\u01b0\u1ee3ng m\u00f9n v\u00e0 nit\u01a1 t\u1ed5ng s\u1ed1 \u1edf m\u1ee9c trung b\u00ecnh \u0111\u1ebfn gi\u1ea7u, nh\u01b0ng h\u00e0m l\u01b0\u1ee3ng P2<\/sub>O5<\/sub> d\u1ec5 ti\u00eau \u1edf m\u1ee9c r\u1ea5t ngh\u00e8o v\u00e0 h\u00e0m l\u01b0\u1ee3ng K2<\/sub>O \u1edf m\u1ee9c ngh\u00e8o. Sau 1 n\u0103m tu\u1ed5i, keo lai sinh tr\u01b0\u1edfng t\u1ed1t nh\u1ea5t \u1edf c\u00f4ng th\u1ee9c b\u00f3n l\u00f3t 1,0 kg ph\u00e2n h\u1eefu c\u01a1 vi sinh + 0,5 kg NPK (16:16:8)\/c\u00e2y, \u0111\u01b0\u1eddng k\u00ednh ngang ng\u1ef1c \u0111\u1ea1t 2,74 cm v\u00e0 chi\u1ec1u cao \u0111\u1ea1t 3,50m; sau 2 n\u0103m tu\u1ed5i sinh tr\u01b0\u1edfng t\u1ed1t nh\u1ea5t \u1edf c\u00f4ng th\u1ee9c b\u00f3n th\u00fac 0,6 kg P2<\/sub>O5<\/sub> + 0,1 kg K2<\/sub>O\/c\u00e2y, \u0111\u01b0\u1eddng k\u00ednh ngang ng\u1ef1c \u0111\u1ea1t 7,90 cm v\u00e0 chi\u1ec1u cao \u0111\u1ea1t 7,85 m. T\u01b0\u01a1ng t\u1ef1 nh\u01b0 v\u1eady, Keo tai t\u01b0\u1ee3ng sau 1 n\u0103m tu\u1ed5i sinh tr\u01b0\u1edfng t\u1ed1t nh\u1ea5t \u1edf c\u00f4ng th\u1ee9c b\u00f3n l\u00f3t 1,0 kg ph\u00e2n h\u1eefu c\u01a1 vi sinh + 0,5 kg NPK (16:16:8)\/c\u00e2y, \u0111\u01b0\u1eddng k\u00ednh ngang ng\u1ef1c \u0111\u1ea1t 2,31 cm v\u00e0 chi\u1ec1u cao \u0111\u1ea1t 2,90 m; sau 2 n\u0103m tu\u1ed5i sinh tr\u01b0\u1edfng t\u1ed1t nh\u1ea5t \u1edf c\u00f4ng th\u1ee9c b\u00f3n th\u00fac 0,6 kg P2<\/sub>O5<\/sub> + 0,1 kg K2<\/sub>O\/c\u00e2y, \u0111\u01b0\u1eddng k\u00ednh ngang ng\u1ef1c \u0111\u1ea1t 7,53 cm v\u00e0 chi\u1ec1u cao \u0111\u1ea1t 6,52 m. C\u0169ng sau 1 n\u0103m tu\u1ed5i, Keo l\u00e1 tr\u00e0m sinh tr\u01b0\u1edfng t\u1ed1t nh\u1ea5t \u1edf c\u00f4ng th\u1ee9c b\u00f3n l\u00f3t 1,0 kg ph\u00e2n h\u1eefu c\u01a1 vi sinh + 0,5 kg NPK (16:16:8)\/c\u00e2y, \u0111\u01b0\u1eddng k\u00ednh ngang ng\u1ef1c \u0111\u1ea1t 1,94 cm v\u00e0 chi\u1ec1u cao \u0111\u1ea1t 2,91m; sau 2 n\u0103m tu\u1ed5i sinh tr\u01b0\u1edfng t\u1ed1t nh\u1ea5t \u1edf c\u00f4ng th\u1ee9c b\u00f3n th\u00fac 0,6 kg P2<\/sub>O5<\/sub> + 0,1 kg K2<\/sub>O, \u0111\u01b0\u1eddng k\u00ednh ngang ng\u1ef1c \u0111\u1ea1t 6,32 cm v\u00e0 chi\u1ec1u cao \u0111\u1ea1t 6,68m.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> B\u00f3n ph\u00e2n, Keo l\u00e1 tr\u00e0m, keo lai, Keo tai t\u01b0\u1ee3ng, sinh tr\u01b0\u1edfng, Thanh H\u00f3a<\/td>\n<\/tr>\n

<\/a>Effect of fertiliser application on growth of young Acacia mangium<\/em>, Acacia auriculiformis<\/em> and their hybrid in Thanh Hoa<\/strong><\/p>\n

Acacia mangium<\/em>, Acacia auriculiformis<\/em> and their hybrid (Acacia mangium<\/em> \u00d7 Acacia auriculiformis<\/em>) are major species for plantation forest in Vietnam. Application of fertiliser has been known as one of intensive silviculture techniques for improving the productivity. This research was conducted in Cam Thuy district, Thanh Hoa province, Central – north of Vietnam to examine the effect of fertilsier on productivity of acacia plantations. The soils in the experimental site are dominated by acidic and leached acrisols of low to medium fertility with pH ranging from 4.52 – 4.66. Total soil organic carbon and nitrogen vary from midle to high fertility; while soil available P (P2<\/sub>O5<\/sub>) and K (K2<\/sub>O) was very low. After 1 year from planting, the highest tree growth of all species was observed in the treatment applied as 1.0 kg compost plus 0.5 kg NPK (16:16:8) per tree, with diameter at breast high (D1.3<\/sub>) of A. hybrid, A. mangium and
\nA. Auriculiformis being 2.74, 2.31 and 1.94 cm, respectively, while tree height (Hvn<\/sub>) being 3.50, 2.90 and 2.91 m, respectively. At age two years, the highest tree growth of the acacia plantations was observed in the treatment of which additional amount of 0.6 kg P2<\/sub>O5<\/sub> plus 0.1 kg K2<\/sub>O per tree were applied, with D1.3<\/sub> of A. hybrid, A. mangium and A. auriculiformis being 7.90, 7.53 and 6.32 cm, respectively,while Hvn<\/sub> being 7.85, 6.52 and 6.68 m, respectively.<\/p>\n

Keywords:<\/em><\/strong> Fertiliser application, Acacia auriculiformis<\/em>, Acacia mangium<\/em>, Acacia hybrid, tree growth, Thanh Hoa<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u1ea2NH H\u01af\u1edeNG C\u1ee6A BI\u1ec6N PH\u00c1P L\u00c0M \u0110\u1ea4T \u0110\u1ebeN SINH TR\u01af\u1edeNG\u00a0C\u1ee6A R\u1eeaNG TR\u1ed2NG KEO TAI T\u01af\u1ee2NG, KEO L\u00c1 TR\u00c0M V\u00c0 KEO LAI\u00a0\u1ede C\u1ea8M TH\u1ee6Y – THANH H\u00d3A<\/p>\n

<\/a>Nguy\u1ec5n Huy S\u01a1n1<\/sup>, H\u1ed3 Trung L\u01b0\u01a1ng1<\/sup>, Ho\u00e0ng Th\u1ecb Nhung1<\/sup>, V\u0169 Ti\u1ebfn L\u00e2m1<\/sup>,
\nPh\u1ea1m \u0110\u00ecnh S\u00e2m1<\/sup>, Ph\u1ea1m V\u0103n Vi\u1ec7n1<\/sup>, Ph\u00f9ng Nhu\u1ec7 Giang2<\/sup><\/p>\n

1<\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n2<\/sup>Trung t\u00e2m Nghi\u00ean c\u1ee9u L\u00e2m s\u1ea3n ngo\u00e0i g\u1ed7<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

L\u00e0m \u0111\u1ea5t tr\u1ed3ng r\u1eebng l\u00e0 m\u1ed9t trong nh\u1eefng bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt quan tr\u1ecdng trong tr\u1ed3ng r\u1eebng th\u00e2m canh n\u00f3i chung, g\u00f3p ph\u1ea7n n\u00e2ng cao n\u0103ng su\u1ea5t v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng r\u1eebng tr\u1ed3ng, nh\u1ea5t l\u00e0 r\u1eebng tr\u1ed3ng th\u00e2m canh c\u00e1c lo\u00e0i keo lai (Acacia hybrids), Keo tai t\u01b0\u1ee3ng (Acacia mangium<\/em>) v\u00e0 Keo l\u00e1 tr\u00e0m (Acacia auriculiformis<\/em>). Trong ph\u1ea1m vi nghi\u00ean c\u1ee9u n\u00e0y \u0111\u00e3 b\u1ed1 tr\u00ed 3 c\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m l\u00e0m \u0111\u1ea5t kh\u00e1c nhau tr\u00ean \u0111\u1ea5t d\u1ed1c t\u1eeb 20 – 250 <\/sup>t\u1ea1i huy\u1ec7n C\u1ea9m Th\u1ee7y, t\u1ec9nh Thanh H\u00f3a, g\u1ed3m: 1\/ C\u00e0y r\u1ea1ch h\u00e0ng, tr\u00ean h\u00e0ng c\u00e0y cu\u1ed1c h\u1ed1 c\u00f3 k\u00edch th\u01b0\u1edbc 30 \u00b4 30 \u00b4 30 cm; 2\/ L\u00e0m b\u1eadc thang theo \u0111\u01b0\u1eddng \u0111\u1ed3ng m\u1ee9c r\u1ed9ng 1m, cu\u1ed1c h\u1ed1 k\u00edch th\u01b0\u1edbc 40 \u00b4 40 \u00b4 40 cm; 3\/ Cu\u1ed1c h\u1ed1 k\u00edch th\u01b0\u1edbc 40 \u00b4 40 \u00b4 40 cm. Sau 2 n\u0103m tr\u1ed3ng keo lai, t\u1ef7 l\u1ec7 s\u1ed1ng trung b\u00ecnh to\u00e0n th\u00ed nghi\u1ec7m \u0111\u1ea1t 91,42%, \u0111\u01b0\u1eddng k\u00ednh ngang ng\u1ef1c dao \u0111\u1ed9ng t\u1eeb 7,76 – 8,05 cm, chi\u1ec1u cao v\u00fat ng\u1ecdn trung b\u00ecnh (Hvn<\/sub>) dao \u0111\u1ed9ng t\u1eeb 6,09 – 6,63m, \u0111\u01b0\u1eddng k\u00ednh t\u00e1n trung b\u00ecnh (Dt) dao \u0111\u1ed9ng t\u1eeb 2,81 – 3,33m, sinh tr\u01b0\u1edfng t\u1ed1t nh\u1ea5t \u1edf c\u00f4ng th\u1ee9c 3 v\u00e0 k\u00e9m nh\u1ea5t \u1edf c\u00f4ng th\u1ee9c 2. Sau 2 n\u0103m tr\u1ed3ng Keo tai t\u01b0\u1ee3ng, t\u1ef7 l\u1ec7 s\u1ed1ng trung b\u00ecnh to\u00e0n th\u00ed nghi\u1ec7m \u0111\u1ea1t 87,52%, \u0111\u01b0\u1eddng k\u00ednh ngang ng\u1ef1c dao \u0111\u1ed9ng t\u1eeb 6,36 – 7,76 cm, chi\u1ec1u cao v\u00fat ng\u1ecdn trung b\u00ecnh (Hvn<\/sub>) dao \u0111\u1ed9ng t\u1eeb 5,40 – 6,59m, \u0111\u01b0\u1eddng k\u00ednh t\u00e1n trung b\u00ecnh (Dt) dao \u0111\u1ed9ng t\u1eeb 2,00 – 2,39m, sinh tr\u01b0\u1edfng t\u1ed1t nh\u1ea5t \u1edf c\u00f4ng th\u1ee9c 3 v\u00e0 k\u00e9m nh\u1ea5t \u1edf c\u00f4ng th\u1ee9c 2. T\u01b0\u01a1ng t\u1ef1 nh\u01b0 v\u1eady, sau 2 n\u0103m tr\u1ed3ng Keo l\u00e1 tr\u00e0m, t\u1ef7 l\u1ec7 s\u1ed1ng trung b\u00ecnh to\u00e0n th\u00ed nghi\u1ec7m \u0111\u1ea1t 85,10%, \u0111\u01b0\u1eddng k\u00ednh ngang ng\u1ef1c dao \u0111\u1ed9ng t\u1eeb 5,01 – 6,89 cm, chi\u1ec1u cao v\u00fat ng\u1ecdn trung b\u00ecnh (Hvn<\/sub>) dao \u0111\u1ed9ng t\u1eeb 5,56 – 6,59m, \u0111\u01b0\u1eddng k\u00ednh t\u00e1n trung b\u00ecnh (Dt) dao \u0111\u1ed9ng t\u1eeb 2,56 – 3,50m, sinh tr\u01b0\u1edfng t\u1ed1t nh\u1ea5t \u1edf c\u00f4ng th\u1ee9c 3 v\u00e0 k\u00e9m nh\u1ea5t \u1edf c\u00f4ng th\u1ee9c 2. Nh\u01b0 v\u1eady, c\u1ea3 3 lo\u00e0i keo \u0111\u1ec1u sinh tr\u01b0\u1edfng t\u1ed1t nh\u1ea5t \u1edf c\u00f4ng th\u1ee9c 3 v\u00e0 sinh tr\u01b0\u1edfng k\u00e9m nh\u1ea5t \u1edf c\u00f4ng th\u1ee9c 2.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Keo lai, Keo tai t\u01b0\u1ee3ng, keo l\u00e1 tr\u00e0m, l\u00e0m \u0111\u1ea5t, tr\u1ed3ng r\u1eebng, Thanh H\u00f3a<\/td>\n<\/tr>\n

<\/a>The effect of site preparation treatment to the growth of acacia hybrids, Acacia mangium<\/em>, A. auriculiformis<\/em> plantation in Cam Thuy district – Thanh Hoa province<\/strong><\/p>\n

Site preparation is an important silviculture treatment for intensive forestry; it contributes to the increase productivity and quality of plantation, especially intensive plantation of Acacia hybrids, Acacia mangium<\/em>, and A. auriculiformis<\/em>. In this study, three different site preparation treatments were used in site slope 20 – 25 degrees included: 1\/ Plowing into rows, in each row was dig holes with size of 30*30*30 cm; 2\/ Making terraces field with 1m wide along contour lines, the hole size of 40*40*40 cm; 3\/ Dig holes with size of 40*40*40 cm. After 2 years, the average survival rate of Acacia hybrids reached 91.42%, average diameter at breast height (DBH) from 7.76 – 8.05 cm, the average height (H) from 6.09 – 6.63m, the average crown diameter (Dcrown<\/sub>) from 2.81 – 3.33m, the best growing is treatment 3 and the worst growing is treatment 2. After 2 years, the average survival rate of Acacia mangium<\/em> reached 87.52%, average diameter at breast height (DBH) from 6.36 – 7.76 cm, the average height (H) from 5.40 – 6.59m, the average crown diameter (Dcrown<\/sub>) from 2.00 – 2.39m, the best growing is treatment 3 and the worst growing is treatment 2. After 2 years, the average survival rate of A. auriculiformis<\/em> reached 85.10%, average DBH from 5.01 – 6.85 cm, the average height (H) from 5.56 – 6.59m, the average crown diameter (Dcrown<\/sub>) from 2.56 – 3.50m, the best growing is treatment 3 and the worst growing is treatment 2. Thus, all of three acacia species have the best growing in treatment 3 and the worst growing in treatment 2.<\/p>\n

Keywords:<\/em><\/strong> Acacia auriculiformis<\/em>, Acacia hybrids, Acacia mangium<\/em>, plantation planting, Thanh Hoa province, site preparation<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U HI\u1ec6N TR\u1ea0NG G\u00c2Y TR\u1ed2NG C\u00c2Y S\u01afA T\u1ea0I PH\u00cdA B\u1eaeC VI\u1ec6T NAM<\/p>\n

<\/a>N\u00f4ng Ph\u01b0\u01a1ng Nhung1, Ph\u1ea1m Quang Thu2, Bernard Dell3, Nguy\u1ec5n Minh Ch\u00ed2<\/sup><\/p>\n

1<\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n2<\/sup>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
\n3<\/sup>School of Veterinary and Life Sciences, Murdoch University, Murdoch<\/a>, Australia<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

C\u00e2y S\u01b0a l\u00e0 m\u1ed9t trong nh\u1eefng lo\u00e0i c\u00e2y g\u1ed7 qu\u00fd, c\u00f3 gi\u00e1 tr\u1ecb kinh t\u1ebf cao n\u00ean nh\u1eefng n\u0103m g\u1ea7n \u0111\u00e2y \u0111\u01b0\u1ee3c g\u00e2y tr\u1ed3ng kh\u00e1 ph\u1ed5 bi\u1ebfn. Nghi\u00ean c\u1ee9u n\u00e0y nh\u1eb1m \u0111\u00e1nh gi\u00e1 hi\u1ec7n tr\u1ea1ng ngu\u1ed3n h\u1ea1t gi\u1ed1ng, k\u1ef9 thu\u1eadt gieo \u01b0\u01a1m, g\u00e2y tr\u1ed3ng c\u00e2y S\u01b0a trong v\u01b0\u1eddn h\u1ed9 v\u00e0 r\u1eebng tr\u1ed3ng \u1edf 16 t\u1ec9nh ph\u00eda B\u1eafc v\u00e0 k\u1ef9 thu\u1eadt t\u1ea1o l\u00f5i. K\u1ebft qu\u1ea3 \u0111i\u1ec1u tra cho th\u1ea5y ngu\u1ed3n h\u1ea1t gi\u1ed1ng S\u01b0a ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c thu t\u1eeb c\u00e1c c\u00e2y m\u1eb9 kh\u00f4ng \u0111\u01b0\u1ee3c tuy\u1ec3n ch\u1ecdn t\u1ea1i V\u0129nh Ph\u00fac v\u00e0 m\u1ed9t ph\u1ea7n thu t\u1eeb c\u00e1c c\u00e2y ph\u00e2n t\u00e1n t\u1ea1i c\u00e1c t\u1ec9nh. C\u00e2y con \u1edf giai \u0111o\u1ea1n 5 th\u00e1ng tu\u1ed5i trung b\u00ecnh \u0111\u1ea1t 50,5 cm v\u1ec1 chi\u1ec1u cao v\u00e0 5,3 mm v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c, c\u00e2y con gieo t\u1eeb ngu\u1ed3n gi\u1ed1ng \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u1ecdn l\u1ecdc c\u00f3 sinh tr\u01b0\u1edfng t\u1ed1t nh\u1ea5t, \u00edt b\u1ecb b\u1ec7nh. Ph\u01b0\u01a1ng th\u1ee9c tr\u1ed3ng ch\u1ee7 y\u1ebfu l\u00e0 tr\u1ed3ng trong c\u00e1c v\u01b0\u1eddn h\u1ed9 v\u1edbi quy m\u00f4 t\u1eeb 50 – 100 c\u00e2y. T\u0103ng tr\u01b0\u1edfng b\u00ecnh qu\u00e2n cao nh\u1ea5t c\u00f3 th\u1ec3 \u0111\u1ea1t 1,5 m\/n\u0103m v\u1ec1 chi\u1ec1u cao v\u00e0 1,6 cm\/n\u0103m v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh \u1edf giai \u0111o\u1ea1n < 5 n\u0103m tu\u1ed5i, trong \u0111\u00f3 c\u00e2y S\u01b0a tr\u1ed3ng \u1edf S\u01a1n La, B\u1eafc Ninh v\u00e0 H\u00e0 N\u1ed9i sinh tr\u01b0\u1edfng t\u1ed1t nh\u1ea5t. Tuy nhi\u00ean, \u1edf m\u1ed9t s\u1ed1 n\u01a1i nh\u01b0 H\u00f2a B\u00ecnh, Ninh B\u00ecnh v\u00e0 Ngh\u1ec7 An do ch\u1ecdn gi\u1ed1ng kh\u00f4ng t\u1ed1t c\u1ed9ng v\u1edbi bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt kh\u00f4ng \u0111\u1ea3m b\u1ea3o n\u00ean c\u00e2y sinh tr\u01b0\u1edfng ch\u1eadm, cong queo, t\u1ef7 l\u1ec7 c\u00e2y \u0111a th\u00e2n cao (37,5 – 58,3%). \u1ede t\u1ea5t c\u1ea3 c\u00e1c \u0111\u1ecba \u0111i\u1ec3m \u0111i\u1ec1u tra \u0111\u1ec1u ghi nh\u1eadn c\u00f3 b\u1ec7nh lo\u00e9t th\u00e2n, trong \u0111\u00f3 c\u00e2y tr\u1ed3ng t\u1ea1i Tuy\u00ean Quang v\u00e0 Ph\u00fa Th\u1ecd b\u1ecb b\u1ec7nh n\u1eb7ng h\u01a1n. B\u01b0\u1edbc \u0111\u1ea7u th\u00ed nghi\u1ec7m t\u1ea1o l\u00f5i v\u00e0 bu\u1ed9c \u00e9p th\u00e2n c\u00e2y b\u1eb1ng c\u1ecdc, k\u1ebft qu\u1ea3 cho th\u1ea5y k\u1ef9 thu\u1eadt t\u1ea1o l\u00f5i hi\u1ec7u qu\u1ea3 l\u00e0 c\u1eaft 100% c\u00e0nh + x\u00e9n 50% r\u1ec5 hay c\u1eaft c\u00e0nh 100% c\u00e0nh + \u0111\u1ea3o c\u00e2y v\u00e0 bu\u1ed9c c\u00e2y sau 2 n\u0103m l\u00e0m gi\u1ea3m \u0111\u1ed9 cong c\u1ee7a c\u00e2y. T\u1eeb k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u \u0111\u00e3 \u0111\u00e1nh gi\u00e1 \u0111\u01b0\u1ee3c c\u00e1c \u01b0u, nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a c\u00e1c bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt gieo \u01b0\u01a1m, g\u00e2y tr\u1ed3ng, t\u1ea1o l\u00f5i, t\u1eeb \u0111\u00f3 \u0111\u1ec1 xu\u1ea5t k\u1ef9 thu\u1eadt g\u00e2y tr\u1ed3ng c\u00e2y S\u01b0a \u0111\u1ec3 khuy\u1ebfn c\u00e1o s\u1edbm cho ng\u01b0\u1eddi tr\u1ed3ng r\u1eebng \u00e1p d\u1ee5ng v\u00e0 l\u00e0m c\u01a1 s\u1edf cho vi\u1ec7c x\u00e2y d\u1ef1ng h\u01b0\u1edbng d\u1eabn k\u1ef9 thu\u1eadt.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> B\u1ec7nh h\u1ea1i, c\u00e2y gi\u1ed1ng, c\u00e2y S\u01b0a, g\u1ed7 l\u00f5i, h\u1ea1t gi\u1ed1ng, h\u00ecnh th\u00e2n, t\u0103ng tr\u01b0\u1edfng, v\u01b0\u1eddn h\u1ed9<\/td>\n<\/tr>\n

<\/a>Cultivation of Dalbergia tonkinensis<\/em> in North Vietnam<\/strong><\/p>\n

Dalbergia tonkinensis<\/em> is a precious tree species of high economic value that in recent years is becoming popular in home gardens in Vietnam. The aims of this study were to assess the current status of seed resources and seedling production, the growth of trees in home gardens and plantations in 16 provinces in the North of Vietnam, and techniques for promoting heartwood formation. Survey results showed that D. tonkinensis<\/em> seed in Vietnam have mainly been collected from mother trees in Vinh Phuc province and this has been supplemented with seed from scattered trees in other provinces. Seedlings produced in local nurseries reached 50.5 cm in height and 5.3 mm in stem diameter at five months of age. Seedlings from selected seed sources had superior growth and less disease than other seed sources. So far, the majority of trees have been established in home gardens with 50 – 100 trees per garden. In plantations and home gardens, the highest average growth rate reached 1.5 m\/year in height and 1.6 cm\/year in diameter up to 5 years of age. Trees in Son La, Bac Ninh and Ha Noi provinces had the best growth. Staking, pruning and thinning have been widely applied to improve stem form and growth. However, in Hoa Binh, Ninh Binh and Nghe An provinces 38 to 58% of trees were multi – stemmed. Canker disease was identified in all sites but the most serious impact was evident in Tuyen Quang and Phu Tho provinces. Techniques to promote heartwood development are being used: cutting 100% of branches + 50% of roots or cutting 100% of branches + transplanting. The present evaluation of techniques for seedling production, silviculture and heartwood promotion provides a basis for the further planting of D. tonkinensis<\/em> in Vietnam.<\/p>\n

Keywords:<\/em><\/strong> Disease, form, growth, heartwood, home garden, rosewood, seed, seedling<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>X\u00c1C \u0110\u1ecaNH TU\u1ed4I KHAI TH\u00c1C T\u1ed0I \u01afU CHO R\u1eeaNG TR\u1ed2NG KEO TAI T\u01af\u1ee2NG T\u1ea0I T\u1ec8NH TH\u00c1I NGUY\u00caN<\/p>\n

<\/a>Nguy\u1ec5n \u0110\u0103ng C\u01b0\u1eddng1<\/sup>, Cao Thi\u0323 Thu Hi\u00ea\u0300n2<\/sup>, B\u00f9i M\u1ea1nh H\u01b0ng2<\/sup>, Nguy\u1ec5n V\u0103n B\u00edch3<\/sup><\/p>\n

1<\/sup> Khoa L\u00e2m nghi\u1ec7p, Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc N\u00f4ng l\u00e2m Th\u00e1i Nguy\u00ean
\n2 <\/sup>Khoa L\u00e2m ho\u0323c, Tr\u01b0\u01a1\u0300ng \u0110a\u0323i ho\u0323c L\u00e2m nghi\u00ea\u0323p
\n3<\/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

Nghi\u00ean c\u1ee9u n\u00e0y \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n nh\u1eb1m x\u00e1c \u0111\u1ecbnh tu\u1ed5i th\u00e0nh th\u1ee5c s\u1ed1 l\u01b0\u1ee3ng v\u00e0 th\u00e0nh th\u1ee5c kinh t\u1ebf cho r\u1eebng tr\u1ed3ng Keo tai t\u01b0\u1ee3ng cung c\u1ea5p nguy\u00ean li\u1ec7u gi\u1ea5y v\u00e0 d\u0103m g\u1ed7 tr\u00ean \u0111\u1ecba b\u00e0n t\u1ec9nh Th\u00e1i Nguy\u00ean, thu\u1ed9c khu v\u1ef1c \u0110\u00f4ng B\u1eafc Vi\u1ec7t Nam. T\u1ed5ng s\u1ed1 140 \u00f4 ti\u00eau chu\u1ea9n (OTC) t\u1eeb tu\u1ed5i 2 \u0111\u1ebfn tu\u1ed5i 9, \u0111\u01b0\u1ee3c b\u1ed1 tr\u00ed theo ph\u01b0\u01a1ng ph\u00e1p h\u1ec7 th\u1ed1ng n\u1eb1m tr\u1ea3i \u0111\u1ec1u tr\u00ean \u0111\u1ecba b\u00e0n t\u1ec9nh \u0111\u1ec3 \u0111o l\u01b0\u1eddng c\u00e1c ch\u1ec9 ti\u00eau sinh s\u01b0\u1edfng c\u1ee7a c\u00e2y. Th\u00eam v\u00e0o \u0111\u00f3, nghi\u00ean c\u1ee9u c\u0169ng ti\u1ebfn h\u00e0nh \u0111i\u1ec1u tra \u0111\u1ec3 thu th\u1eadp th\u00f4ng tin v\u1ec1 chi ph\u00ed \u0111\u1ea7u t\u01b0 cho r\u1eebng tr\u1ed3ng, gi\u00e1 g\u1ed7, ch\u00ed ph\u00ed khai th\u00e1c v\u00e0 thu nh\u1eadp t\u1eeb b\u00e1n g\u1ed7,… M\u00f4 h\u00ecnh s\u1ea3n l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u01b0\u1edbc l\u01b0\u1ee3ng tu\u1ed5i th\u00e0nh th\u1ee5c s\u1ed1 l\u01b0\u1ee3ng, trong khi \u0111\u00f3 ch\u1ec9 ti\u00eau NPV v\u00e0 LEV \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh tu\u1ed5i th\u00e0nh th\u1ee5c kinh t\u1ebf. K\u1ebft qu\u1ea3 cho th\u1ea5y m\u1ed1i t\u01b0\u01a1ng quan gi\u1eefa s\u1ea3n l\u01b0\u1ee3ng v\u1edbi tu\u1ed5i v\u00e0 m\u1eadt \u0111\u1ed9 l\u00e2m ph\u1ea7n \u0111\u01b0\u1ee3c m\u00f4 ph\u1ecfng theo d\u1ea1ng ph\u01b0\u01a1ng tr\u00ecnh \u00a0\u00a0. D\u1ef1a tr\u00ean m\u00f4 h\u00ecnh s\u1ea3n l\u01b0\u1ee3ng n\u00e0y, tu\u1ed5i th\u00e0nh th\u1ee5c s\u1ed1 l\u01b0\u1ee3ng c\u1ee7a lo\u00e0i Keo tai t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh l\u00e0 tu\u1ed5i 6. Tu\u1ed5i th\u00e0nh th\u1ee5c kinh t\u1ebf x\u00e1c \u0111\u1ecbnh cho m\u1ed9t chu k\u1ef3 ri\u00eang l\u1ebb (d\u1ef1a v\u00e0o gi\u00e1 tr\u1ecb NPV) l\u00e0 tu\u1ed5i 8 v\u1edbi NPV \u0111\u1ea1t 30 tri\u1ec7u \u0111\u1ed3ng\/ha, trong khi \u0111\u00f3 n\u1ebfu x\u00e1c \u0111\u1ecbnh cho nhi\u1ec1u chu k\u1ef3 tr\u1ed3ng r\u1eebng li\u00ean t\u1ee5c (d\u1ef1a v\u00e0o ch\u1ec9 s\u1ed1 LEV) th\u00ec tu\u1ed5i th\u00e0nh th\u1ee5c kinh t\u1ebf l\u00e0 \u1edf tu\u1ed5i 6 v\u1edbi gi\u00e1 tr\u1ecb LEV \u0111\u1ea1t 71,3 tri\u1ec7u \u0111\u1ed3ng\/ha. Khi gi\u1ea3 \u0111\u1ecbnh gi\u00e1 g\u1ed7 t\u0103ng l\u00ean 20% v\u00e0 40% th\u00ec tu\u1ed5i th\u00e0nh th\u1ee5c kinh t\u1ebf kh\u00f4ng thay \u0111\u1ed5i khi xem x\u00e9t \u0111\u1ebfn c\u1ea3 \u0111\u01a1n lu\u00e2n k\u1ef3 v\u00e0 nhi\u1ec1u lu\u00e2n k\u1ef3. Tu\u1ed5i th\u00e0nh th\u1ee5c kinh t\u1ebf \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh d\u1ef1a tr\u00ean ch\u1ec9 s\u1ed1 LEV kh\u00f4ng thay \u0111\u1ed5i khi gi\u1ea3 \u0111\u1ecbnh t\u1ef7 l\u1ec7 chi\u1ebft kh\u1ea5u t\u0103ng ho\u1eb7c gi\u1ea3m. Ng\u01b0\u1ee3c l\u1ea1i, tu\u1ed5i th\u00e0nh th\u1ee5c kinh t\u1ebf \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh d\u1ef1a tr\u00ean ch\u1ec9 s\u1ed1 NPV c\u00f3 s\u1ef1 dao \u0111\u1ed9ng khi thay \u0111\u1ed5i t\u1ef7 l\u1ec7 chi\u1ebft kh\u1ea5u. K\u1ebft qu\u1ea3 n\u00e0y ch\u1ec9 ra r\u1eb1ng, ch\u1ec9 s\u1ed1 LEV \u1ed5n \u0111\u1ecbnh h\u01a1n ch\u1ec9 s\u1ed1 NPV trong x\u00e1c \u0111\u1ecbnh tu\u1ed5i th\u00e0nh th\u1ee5c kinh t\u1ebf.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Tu\u1ed5i th\u00e0nh th\u1ee5c s\u1ed1 l\u01b0\u1ee3ng, tu\u1ed5i th\u00e0nh th\u1ee5c kinh t\u1ebf, Keo tai t\u01b0\u1ee3ng,
\nhi\u1ec7u qu\u1ea3 kinh t\u1ebf,
\nTh\u00e1i Nguy\u00ean<\/td>\n<\/tr>\n

<\/a>Determination of optimum rotation age for Acacia mangium<\/em> plantations in Thai Nguyen province, Vietnam<\/strong><\/p>\n

The study was conducted in Thai Nguyen province, Northern Vietnam to determine the biologically and economically optimum rotation age of Acacia mangium <\/em>planted for supplying pulp and wood chips. A total of 140 plots of the plantation, ages ranged from 2 to 9, were systematically sampled across the province for measuring tree growth parameters. Additionally, a survey was also conducted to obtain the information about investment, wood prices and income from selling wood products, etc. Yield modeling was used to estimate biologically optimum rotation age (BORA) while NPV and LEV index was used to determine the economically optimum rotation age (EORA). The results showed that the correlation between yield and stand age and stand density was simulated by the function. Based on the yield model, BORA of the A. mangium <\/em>was at 6 years. The EORA considering a single rotation of A. mangium <\/em>was at age 8 with the NPV of 30 million VND per hectare, while for multiple rotations, the economically optimum rotation age was at age 6 with LEV of 71.3 million VND per hectare. These figures was unchanged when increasing wood price by 20% or 40%. The EORA based on LEV index remained the same either decreasing or increasing in the discount rate. In contrast, the EORA based on NPV index was fluctuate when changing the discount rate. The results indicated that LEV index is more suitable than the NPV in order to determine the economically optimum rotation age.<\/p>\n

Keywords:<\/em><\/strong> Biologically optimum rotation age, economically optimum rotation age, Acacia mangium<\/em>, economic efficiency, Thai Nguyen province<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U SINH KH\u1ed0I V\u00c0 CARBON T\u00cdCH L\u0168Y
\nTRONG C\u00c2Y C\u00c1 L\u1eba LU\u1ed2NG (Dendrocalamus barbatus<\/em>)
\nT\u1ea0I T\u1ec8NH THANH H\u00d3A<\/p>\n

<\/a>Nguy\u1ec5n \u0110\u1ee9c H\u1ea3i1<\/sup>, Nguy\u1ec5n Ho\u00e0ng Ti\u1ec7p2<\/sup><\/p>\n

[1]Trung t\u00e2m Khuy\u1ebfn N\u00f4ng Qu\u1ed1c gia
\n2Trung t\u00e2m Nghi\u00ean c\u1ee9u Kinh t\u1ebf L\u00e2m nghi\u1ec7p<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Nghi\u00ean c\u1ee9u sinh kh\u1ed1i kh\u00f4 v\u00e0 carbon t\u00edch l\u0169y trong c\u00e2y c\u00e1 l\u1ebb Lu\u1ed3ng l\u00e0m c\u01a1 s\u1edf cho vi\u1ec7c nghi\u00ean c\u1ee9u \u0111\u1ed9ng th\u00e1i carbon c\u1ee7a r\u1eebng Lu\u1ed3ng trong qu\u00e1 tr\u00ecnh kinh doanh l\u00e0 r\u1ea5t c\u1ea7n thi\u1ebft v\u00e0 c\u00f3 \u00fd ngh\u0129a. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u \u0111\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c sinh kh\u1ed1i kh\u00f4 c\u1ee7a c\u00e2y c\u00e1 l\u1ebb Lu\u1ed3ng t\u1eadp trung ch\u1ee7 y\u1ebfu \u1edf th\u00e2n kh\u00ed sinh (chi\u1ebfm 71,4%), c\u00e0nh (chi\u1ebfm 13,2%), th\u00e2n ng\u1ea7m (chi\u1ebfm 8,9%) v\u00e0 l\u00e1 (chi\u1ebfm 6,5%). \u0110\u1ed3ng th\u1eddi c\u0169ng \u0111\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c t\u1ef7 l\u1ec7 carbon trong ph\u1ea7n th\u00e2n kh\u00ed sinh l\u00e0 l\u1edbn nh\u1ea5t (chi\u1ebfm 52,3%), th\u00e2n ng\u1ea7m (chi\u1ebfm 51,2%), c\u00e0nh (chi\u1ebfm 49,7%) v\u00e0 l\u00e1 (chi\u1ebfm 42,6%). Nghi\u00ean c\u1ee9u n\u00e0y c\u0169ng \u0111\u00e3 x\u00e2y d\u1ef1ng \u0111\u01b0\u1ee3c 4 ph\u01b0\u01a1ng tr\u00ecnh t\u01b0\u01a1ng quan gi\u1eefa sinh kh\u1ed1i kh\u00f4 c\u00e2y c\u00e1 l\u1ebb v\u1edbi c\u00e1c nh\u00e2n t\u1ed1 \u0111i\u1ec1u tra v\u00e0 4 ph\u01b0\u01a1ng tr\u00ecnh t\u01b0\u01a1ng quan gi\u1eefa l\u01b0\u1ee3ng carbon t\u00edch l\u0169y trong c\u00e2y c\u00e1 l\u1ebb v\u1edbi c\u00e1c nh\u00e2n t\u1ed1 \u0111i\u1ec1u tra l\u00e2m ph\u1ea7n (D1,3\u00ad<\/sub>, Hvn<\/sub>). K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u n\u00e0y l\u00e0 c\u01a1 s\u1edf \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh nhanh l\u01b0\u1ee3ng sinh kh\u1ed1i kh\u00f4 v\u00e0 l\u01b0\u1ee3ng carbon t\u00edch l\u0169y c\u1ee7a c\u00e2y c\u00e1 l\u1ebb Lu\u1ed3ng.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> S<\/em>inh kh\u1ed1i, carbon t\u00edch l\u0169y, c\u00e2y Lu\u1ed3ng, Thanh H\u00f3a<\/td>\n<\/tr>\n

<\/a>Study of biomass and carbon stock of Dendrocalamus barbatus <\/em>species in Thanh Hoa province<\/strong><\/p>\n

Study of biomass and carbon stock of Dendrocalamus barbatus <\/em>is a background study toward carbon dynamics assessment of Dendrocalamus barbatu<\/em>s <\/em>plantation. This study is necessary and meaningful for valuating environmental service of bamboo forest. Research results show that biomass of individual bamboo tree is mainly contributed in culm (accounting for 71.4%), branches (accounting for 13.2%), rhizome (accounting for 8.9%) and leaves (6.5%). The research also indicates that the proportion of carbon content in biomass (biomass carbon) targets the highest number at 52.3% for culm. The percentage for rhizome, branch and leaves are 51.2%, 49.7% and 42.6% respectively. There are four allometric models were developed to examine the relationship between biomass and carbon stock of bamboo tree and there are four allometric models describing relationship between carbon stock of bamboo tree and D1,3<\/sub> and Hvn<\/sub>. These models can be used for quick estimation biomass and carbon stock of bamboo tree.<\/p>\n

Keywords:<\/em><\/strong> Biomass, carbon stock, Dendrocalamus barbatus<\/em>, Thanh Hoa<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>PH\u00c2N T\u00cdCH THAY \u0110\u1ed4I TH\u1ea2M PH\u1ee6 D\u1ef0A V\u00c0O \u1ea2NH V\u1ec6 TINH \u0110A TH\u1edcI GIAN V\u00c0 CHU\u1ed6I MARKOV T\u1ea0I T\u1ec8NH \u0110\u1eaeK N\u00d4NG<\/p>\n

<\/a>Nguy\u00ea\u0303n Thi\u0323 Thanh H\u01b0\u01a1ng, Ng\u00f4 Thi\u0323 Thu\u0300y Ph\u01b0\u01a1ng<\/p>\n

Khoa N\u00f4ng L\u00e2m nghi\u1ec7p, Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc T\u00e2y Nguy\u00ean<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Nghi\u00ean c\u1ee9u \u0111\u00e3 s\u01b0\u0309 du\u0323ng m\u00f4 hi\u0300nh CA-Markov nh\u01b0 m\u00f4\u0323t c\u00f4ng cu\u0323 h\u00f4\u0303 tr\u01a1\u0323 \u0111\u00ea\u0309 ph\u00e2n ti\u0301ch va\u0300 d\u01b0\u0323 ba\u0301o xu h\u01b0\u01a1\u0301ng thay \u0111\u00f4\u0309i tha\u0309m phu\u0309\/s\u01b0\u0309 du\u0323ng \u0111\u00e2\u0301t (LULC) trong \u0111o\u0301 co\u0301 l\u01a1\u0301p phu\u0309 r\u01b0\u0300ng ta\u0323i t\u1ec9nh \u0110\u1eafk N\u00f4ng. \u0110\u00e2\u0300u ti\u00ean nghi\u00ean c\u01b0\u0301u \u0111a\u0303 so sa\u0301nh \u0111\u00f4\u0323 chi\u0301nh xa\u0301c cu\u0309a ph\u01b0\u01a1ng ph\u00e1p ph\u00e2n lo\u1ea1i theo h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng OBIA (Object Based Image Analysis) v\u00e0 ph\u00e2n lo\u1ea1i d\u01b0\u0323a va\u0300o pixel MLC (Maximum Likelihood Classification) \u0111\u00ea\u0309 ph\u00e2n loa\u0323i a\u0309nh v\u00ea\u0323 tinh Landsat n\u0103m 2017. K\u1ebft qu\u1ea3 cho th\u1ea5y ph\u01b0\u01a1ng ph\u00e1p OBIA c\u00f3 \u0111\u1ed9 ch\u00ednh x\u00e1c cao h\u01a1n 10% so v\u01a1\u0301i ph\u01b0\u01a1ng pha\u0301p MLC. V\u00ec v\u1eady ph\u01b0\u01a1ng pha\u0301p OBIA \u0111a\u0303 \u0111\u01b0\u01a1\u0323c s\u01b0\u0309 du\u0323ng \u0111\u00ea\u0309 ph\u00e2n loa\u0323i ca\u0301c a\u0309nh v\u1ec7 tinh Landsat trong toa\u0300n b\u00f4\u0323 giai \u0111oa\u0323n t\u01b0\u0300 1989 – 2017. Trong b\u01b0\u01a1\u0301c ti\u00ea\u0301p theo, ky\u0303 thu\u00e2\u0323t GIS \u0111a\u0303 \u0111\u01b0\u01a1\u0323c du\u0300ng \u0111\u00ea\u0309 ph\u00e2n ti\u0301ch thay \u0111\u00f4\u0309i LULC d\u01b0\u0323a va\u0300o a\u0309nh v\u00ea\u0323 tinh \u0111a th\u01a1\u0300i gian \u0111a\u0303 \u0111\u01b0\u01a1\u0323c ph\u00e2n loa\u0323i. K\u00ea\u0301t qua\u0309 chi\u0309 ra di\u1ec7n t\u00edch r\u1eebng t\u1ef1 nhi\u00ean t\u1eeb n\u0103m 1989 \u0111\u1ebfn n\u0103m 2017 \u0111a\u0303 gi\u1ea3m khoa\u0309ng 54%. Trong b\u01b0\u01a1\u0301c cu\u1ed1i c\u00f9ng s\u01b0\u0309 du\u0323ng ma tr\u1eadn di\u0323ch chuy\u00ea\u0309n t\u01b0\u0300 m\u00f4 hi\u0300nh CA-Markov, ph\u00e2n b\u00f4\u0301 kh\u00f4ng gian LULC n\u0103m 2026 \u0111a\u0303 \u0111\u01b0\u01a1\u0323c m\u00f4 pho\u0309ng d\u01b0\u0323a tr\u00ean 2 ngu\u00f4\u0300n d\u01b0\u0303 li\u00ea\u0323u la\u0300 LULC va\u0300 ph\u00e2n t\u00edch \u0111a nh\u00e2n t\u1ed1 (MCE) g\u00f4\u0300m m\u00f4\u0323t s\u00f4\u0301 nh\u00e2n t\u00f4\u0301 t\u01b0\u0323 nhi\u00ean va\u0300 xa\u0303 h\u00f4\u0323i. K\u1ebft qu\u1ea3 ph\u00e2n ti\u0301ch cho th\u00e2\u0301y, n\u00ea\u0301u kh\u00f4ng co\u0301 k\u00ea\u0301 hoa\u0323ch \u0111\u00ea\u0309 ba\u0309o v\u00ea\u0323 r\u01b0\u0300ng hi\u00ea\u0323u qua\u0309 h\u01a1n, kha\u0309 n\u0103ng \u0111\u00ea\u0301n n\u0103m 2026 r\u01b0\u0300ng ti\u00ea\u0301p tu\u0323c gi\u1ea3m t\u1eeb 34% (n\u0103m 2017) c\u00f2n 30%, t\u01b0\u01a1ng \u01b0\u0301ng di\u1ec7n t\u00edch r\u1eebng t\u1ef1 nhi\u00ean s\u1ebd m\u1ea5t kho\u1ea3ng 29.000ha, chi\u1ebfm 16% t\u1ed5ng di\u1ec7n t\u00edch thay \u0111\u1ed5i.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Tha\u0309m phu\u0309, Cellular Automata, m\u00f4 hi\u0300nh Markov, ph\u00e2n loa\u0323i g\u00e2\u0300n \u0111u\u0301ng nh\u00e2\u0301t Maximum Likelihood, Ph\u00e2n ti\u0301ch a\u0309nh d\u01b0\u0323a theo h\u01b0\u01a1\u0301ng \u0111\u00f4\u0301i t\u01b0\u01a1\u0323ng Object Based Image Analysis<\/td>\n<\/tr>\n

<\/a>Analysis of land use\/land cover change in Dak Nong province using multitemporal satellite images and markov<\/strong><\/p>\n

The study used the CA-Markov model as a support tool to analyze and forecast the trend of land use and land cover change (LULC) including forest cover in Dak Nong province. Firstly, classification accuracy of the two methods of OBIA (Object Based Image Analysis) and MLC (Maximum Likelihood Classification) was evaluated and compared using Landsat satellite image captured in 2017. Results show higher accuracy was found by OBIA with 10% compared to MLC method. Therefore, OBIA was applied to classify a dataset of multi-temporal Landsat satellite images collected from 1989 to 2017. In the next step, GIS techniques were used to analyze LULC changes based on LULC maps classified as mentioned above. The results indicated that a significant decreasion of natural forest areas from 1989 to 2017 were detected by around 54%. In the final step, using the transition matrix from the CA-Markov model, the LULC spatial distribution in 2026 was simulated based on two data sources, LULC and multifactor analysis (MCE), including a number of factors. natural and social. Analysis results show that, if there is no plan to protect forests more effectively, the possibility of forests will continue to decrease from 34% (in 2017) to 30% in 2026, corresponding to the loss of natural forest area of 29,000 ha in Dak Nong province.<\/p>\n

Keywords:<\/em><\/strong> Land cover, Cellular Automata, Markov, Maximum likelihood, multi criteria rvaluation, object based image analysis<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>T\u00c1C \u0110\u1ed8NG C\u1ee6A CH\u00cdNH S\u00c1CH L\u00c2M NGHI\u1ec6P\u00a0\u0110\u1ebeN M\u1ed0I QUAN H\u1ec6 GI\u1eeeA T\u00c0I NGUY\u00caN R\u1eeaNG V\u00c0 SINH K\u1ebe C\u1ed8NG \u0110\u1ed2NG D\u00c2N T\u1ed8C THI\u1ec2U S\u1ed0 V\u00d9NG T\u00c2Y NGUY\u00caN<\/p>\n

<\/a>B\u1ea3o Huy<\/p>\n

Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc T\u00e2y Nguy\u00ean<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

V\u1edbi m\u1ee5c \u0111\u00edch xem x\u00e9t c\u00e1c t\u00e1c \u0111\u1ed9ng c\u1ee7a ch\u00ednh s\u00e1ch l\u00e2m nghi\u1ec7p \u0111\u1ebfn sinh k\u1ebf c\u1ee7a c\u1ed9ng \u0111\u1ed3ng b\u1ea3n \u0111\u1ecba T\u00e2y Nguy\u00ean v\u00e0 t\u00e0i nguy\u00ean r\u1eebng trong g\u1ea7n 35 n\u0103m (t\u1eeb 1986 \u0111\u1ebfn nay), ph\u01b0\u01a1ng ph\u00e1p t\u1ed5ng quan v\u00e0 ph\u00e2n t\u00edch t\u00e0i li\u1ec7u, v\u0103n b\u1ea3n ch\u00ednh s\u00e1ch \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng k\u1ebft h\u1ee3p v\u1edbi c\u00e1c c\u00f4ng c\u1ee5 ph\u00e2n t\u00edch th\u00f4ng tin nh\u01b0 ph\u00e2n t\u00edch SWOT, ph\u00e2n t\u00edch tr\u01b0\u1eddng l\u1ef1c v\u00e0 ph\u00e2n t\u00edch t\u1ee9 di\u1ec7n. K\u1ebft qu\u1ea3 cho th\u1ea5y c\u00e1c ch\u00ednh s\u00e1ch li\u00ean quan \u0111\u1ebfn qu\u1ea3n l\u00fd b\u1ea3o v\u1ec7 v\u00e0 ph\u00e1t tri\u1ec3n r\u1eebng \u1edf T\u00e2y Nguy\u00ean \u0111\u00e3 t\u00e1c \u0111\u1ed9ng \u0111\u1ebfn \u0111\u1eddi s\u1ed1ng c\u1ee7a c\u1ed9ng \u0111\u1ed3ng d\u00e2n t\u1ed9c thi\u1ec3u s\u1ed1 b\u1ea3n \u0111\u1ecba v\u00e0 r\u1eebng \u1edf hai m\u1eb7t t\u00edch c\u1ef1c v\u00e0 ti\u00eau c\u1ef1c. T\u1ef7 l\u1ec7 giao r\u1eebng cho h\u1ed9, c\u1ed9ng \u0111\u1ed3ng \u0111\u1ecba ph\u01b0\u01a1ng \u1edf T\u00e2y Nguy\u00ean r\u1ea5t th\u1ea5p, ch\u1ec9 c\u00f3 3,9% di\u1ec7n t\u00edch r\u1eebng v\u00e0 \u0111\u1ea5t l\u00e2m nghi\u1ec7p. H\u1ec7 qu\u1ea3 ch\u1ee7 y\u1ebfu l\u00e0 Con ng\u01b0\u1eddi \u0111\u01b0\u1ee3c – R\u1eebng m\u1ea5t<\/em> v\u00e0 Con ng\u01b0\u1eddi m\u1ea5t – R\u1eebng m\u1ea5t<\/em>. Gi\u1ea3i ph\u00e1p ph\u00e1t tri\u1ec3n sinh k\u1ebf cho c\u1ed9ng \u0111\u1ed3ng thi\u1ec3u s\u1ed1 b\u1ea3n \u0111\u1ecba g\u1eafn v\u1edbi qu\u1ea3n l\u00fd r\u1eebng b\u1ec1n v\u1eefng c\u1ea7n bao g\u1ed3m: i) Quy ho\u1ea1ch l\u1ea1i ch\u1ee7 r\u1eebng v\u00e0 giao \u0111\u1ea5t giao r\u1eebng; ii) Ph\u00e1t tri\u1ec3n Doanh nghi\u1ec7p l\u00e2m nghi\u1ec7p c\u1ed9ng \u0111\u1ed3ng; iii) Ph\u1ee5c h\u1ed3i, ph\u00e1t tri\u1ec3n r\u1eebng \u0111\u1ec3 t\u1ea1o sinh k\u1ebf \u1edf c\u00e1c c\u1ed9ng \u0111\u1ed3ng nh\u1eadn r\u1eebng; iv) T\u1ea1o c\u00e1c ngu\u1ed3n thu nh\u1eadp t\u1eeb s\u1ea3n ph\u1ea9m r\u1eebng cho c\u1ed9ng \u0111\u1ed3ng v\u1edbi c\u01a1 ch\u1ebf ch\u00ednh s\u00e1ch th\u00edch h\u1ee3p.<\/em><\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Ch\u00ednh s\u00e1ch l\u00e2m nghi\u1ec7p, c\u1ed9ng \u0111\u1ed3ng d\u00e2n t\u1ed9c thi\u1ec3u s\u1ed1, r\u1eebng b\u1ec1n v\u1eefng, sinh k\u1ebf c\u1ed9ng \u0111\u1ed3ng, T\u00e2y Nguy\u00ean<\/td>\n<\/tr>\n

<\/a>Impact of forestry policies on the relationship between forest resources and livelihood of ethnic minority communities in the Central Highlands of Vietnam<\/strong><\/p>\n

With the purpose of considering the effects of forestry policy on the livelihoods of ethnic minorities and forest resources in the Central Highland for nearly 35 years (from 1986 to present), a literature review was done using methods of analyzing scientific articles, documents of forestry policies, laws in conjunction with information analysis tools such as SWOT, force field analysis and four – fold classi\ufb01cation model of human well – being and forest cover. The results show that policies related to forest protection and development in the Central Highlands affected the livelihood of ethnic minorities and forest resources in both positive and negative aspects. The percentage of forest allocation to households and local communities in the Central Highhlands was very low, only 3.9% of forest area and forest land. The main problem is Human Well – being win – Forest lose<\/em> and Human Well – being lose – Forest lose<\/em>. Livelihood development solutions for indigenous ethnic minority communities associated with sustainable forest management should include: i) Re – planning of forest owners and forest land allocation; ii) Development of community forestry enterprises; iii) Rehabilitation and development of degraded forest resources to create livelihoods in communities receiving forests; iv) Generate income from forest products for the community with the appropriate policy mechanism.<\/p>\n

Keywords:<\/em><\/strong> Central Highlands, ethnic minority community, forestry policy, livelihood of community, sustainable forest<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u0110\u00c1NH GI\u00c1 \u0110\u1ed8 B\u1ec0N T\u1ef0 NHI\u00caN C\u1ee6A G\u1ed6 B\u1edcI L\u1edcI V\u00c0NG (Litsea pierrei<\/em> Lecomte) V\u00c0 D\u1eba \u0110\u1ece (Lithocarpus ducampii<\/em> A. Camus) V\u1edaI C\u00c1C SINH V\u1eacT G\u00c2Y H\u1ea0I CH\u00cdNH TRONG \u0110I\u1ec0U KI\u1ec6N PH\u00d2NG TH\u00cd NGHI\u1ec6M<\/p>\n

<\/a>V\u00f5 \u0110\u1ea1i H\u1ea3i1<\/sup>, B\u00f9i Th\u1ecb Th\u1ee7y2<\/sup>, Ho\u00e0ng Th\u1ecb T\u00e1m2<\/sup>,
\n\u0110o\u00e0n Th\u1ecb B\u00edch Ng\u1ecdc2<\/sup>, Nguy\u1ec5n Th\u1ecb H\u1eb1ng2<\/sup>, Nguy\u1ec5n V\u0103n \u0110\u1ee9c2<\/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 C\u00f4ng nghi\u1ec7p r\u1eebng<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

B\u1eddi l\u1eddi v\u00e0ng v\u00e0 D\u1ebb \u0111\u1ecf l\u00e0 hai lo\u00e0i c\u00e2y b\u1ea3n \u0111\u1ecba \u0111ang \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u \u0111\u1ec3 tr\u1ed3ng r\u1eebng cung c\u1ea5p g\u1ed7 l\u1edbn, c\u00f3 gi\u00e1 tr\u1ecb kinh t\u1ebf cao. \u0110\u1ed9 b\u1ec1n t\u1ef1 nhi\u00ean l\u00e0 m\u1ed9t \u0111\u1eb7c t\u00ednh c\u1ee7a g\u1ed7 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 l\u00e0m ti\u00eau chu\u1ea9n \u0111\u00e1nh gi\u00e1 gi\u00e1 tr\u1ecb s\u1eed d\u1ee5ng c\u1ee7a g\u1ed7. Trong nghi\u00ean c\u1ee9u n\u00e0y \u0111\u00e3 \u0111\u00e1nh gi\u00e1 \u0111\u01b0\u1ee3c \u0111\u1ed9 b\u1ec1n t\u1ef1 nhi\u00ean trong \u0111i\u1ec1u ki\u1ec7n ph\u00f2ng th\u00ed nghi\u1ec7m c\u1ee7a g\u1ed7 B\u1eddi l\u1eddi v\u00e0ng v\u00e0 D\u1ebb \u0111\u1ecf v\u1edbi n\u1ea5m m\u1ee5c Trametes corrugata <\/em>T1, 5 ch\u00f9ng n\u1ea5m m\u1ed1c Aspergillus niger<\/em> Ni, Penicillium citreosulfuratum<\/em> NA27.2, Chaetomium globosum<\/em> ND7, Paracremonium contagium<\/em> ND5, Aureobasidium pullulans<\/em> Apu00 v\u00e0 m\u1ed1i Cototermes formosanus<\/em>. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u \u0111\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u1ed9 b\u1ec1n t\u1ef1 nhi\u00ean c\u1ee7a g\u1ed7 B\u1eddi l\u1eddi v\u00e0ng v\u00e0 D\u1ebb \u0111\u1ecf \u0111\u1ea1t m\u1ee9c trung b\u00ecnh v\u1edbi m\u1ed1i v\u00e0 c\u00f3 \u0111\u1ed9 b\u1ec1n k\u00e9m v\u1edbi n\u1ea5m m\u1ed1c. G\u1ed7 D\u1ebb \u0111\u1ecf c\u00f3 \u0111\u1ed9 b\u1ec1n r\u1ea5t t\u1ed1t v\u1edbi n\u1ea5m m\u1ee5c, g\u1ed7 B\u1eddi l\u1eddi v\u00e0ng ch\u1ec9 \u0111\u1ea1t \u0111\u1ed9 b\u1ec1n trung b\u00ecnh v\u1edbi n\u1ea5m m\u1ee5c. V\u00ec v\u1eady c\u1ea7n nghi\u00ean c\u1ee9u c\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o qu\u1ea3n cho g\u1ed7 D\u1ebb \u0111\u1ecf v\u00e0 B\u1eddi l\u1eddi v\u00e0ng ph\u00f9 h\u1ee3p v\u1edbi m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng g\u1ed7.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> B\u1eddi l\u1eddi v\u00e0ng, Cototermes formosanus<\/em>, D\u1ebb \u0111\u1ecf,
\n\u0111\u1ed9 b\u1ec1n t\u1ef1 nhi\u00ean<\/td>\n<\/tr>\n

<\/a>Investigation on natural durability of Vietnamese broad wood species (Litsea pierrei<\/em> Lecomte and Lithocarpus ducampii<\/em> A. Camus) with main pest organisms in laboratory conditions<\/strong><\/p>\n

Litsea pierrei<\/em> Lecomte and Lithocarpus ducampii<\/em> A. Camus are two wood species, prospect in forests providing large timber with high economic value. The natural durability is a characteristic of wood used as a criterion for assessing the wood utility. In this study, the natural durability of these two species was examined with fungi (Trametes corrugata<\/em> T1 v\u00e0 5 mould species Aspergillus niger<\/em> Ni, Penicillium citreosulfuratum<\/em> NA27.2, Chaetomium globosum<\/em> ND7, Paracremonium contagium<\/em> ND5, Aureobasidium pullulans<\/em> Apu00) and Formosan Subterranian termite Cototermes formosanus. Laboratory results have shown that the natural durability of litsea pierrei Lecomte and lithocarpus ducampii a. Camus is moderate with termite and is less resistant to mould. While lithocarpus ducampii a. Camus has a very good durability with the fungus, litsea pierrei Lecomte has medium durability in the same condition. Therefore, it is necessary to study preventive measures before using.<\/p>\n

Keywords:<\/em><\/strong> Litsea pierrei<\/em> Lecomte, Coptotermes formosanus, Lithocarpus ducampii A. Camus,<\/em> natural durability<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u1ea2NH H\u01af\u1edeNG C\u1ee6A TH\u00d4NG S\u1ed0 NG\u00c2M T\u1ea8M KEO CHO LU\u1ed2NG\u00a0\u0110\u1ebeN CH\u1ea4T L\u01af\u1ee2NG TRE \u00c9P KH\u1ed0I L\u00c0M V\u1eacT LI\u1ec6U X\u00c2Y D\u1ef0NG<\/p>\n

<\/a>Nguy\u1ec5n Quang Trung, Nguy\u1ec5n Th\u1ecb Ph\u01b0\u1ee3ng, Ph\u1ea1m Th\u1ecb Thanh Mi\u1ec1n<\/p>\n

Vi\u1ec7n Nghi\u00ean c\u1ee9u C\u00f4ng nghi\u1ec7p r\u1eebng<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

S\u1eed d\u1ee5ng keo Phenol Formaldehyde v\u00e0 Lu\u1ed3ng (Dendrocalamus barbatus<\/em>) l\u00e0m nguy\u00ean li\u1ec7u nghi\u00ean c\u1ee9u t\u1ea1o tre \u00e9p kh\u1ed1i l\u00e0m v\u1eadt li\u1ec7u x\u00e2y d\u1ef1ng. V\u1edbi c\u00e1c c\u1ea5p n\u1ed3ng \u0111\u1ed9 keo ng\u00e2m t\u1ea9m 30%, 40%, 50% v\u00e0 th\u1eddi gian ng\u00e2m t\u1ea9m 10 ph\u00fat, 15 ph\u00fat, 20 ph\u00fat \u0111\u01b0\u1ee3c kh\u1ea3o s\u00e1t. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y, khi ng\u00e2m keo v\u1edbi n\u1ed3ng \u0111\u1ed9 40%, th\u1eddi gian ng\u00e2m keo 15 ph\u00fat l\u00e0 ph\u00f9 h\u1ee3p \u0111\u1ec3 t\u1ea1o s\u1ea3n ph\u1ea9m tre \u00e9p kh\u1ed1i c\u00f3 ch\u1ea5t l\u01b0\u1ee3ng \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u l\u00e0m v\u1eadt li\u1ec7u x\u00e2y d\u1ef1ng. K\u1ebft qu\u1ea3 c\u00e1c t\u00ednh ch\u1ea5t c\u01a1 v\u1eadt l\u00fd \u0111\u1ea1t \u0111\u01b0\u1ee3c nh\u01b0 sau: Kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 t\u00edch tre \u00e9p kh\u1ed1i \u0111\u1ea1t 1,2 g\/cm3<\/sup>; \u0111\u1ed9 b\u1ec1n tr\u01b0\u1ee3t d\u1ecdc th\u1edb 12,6 MPa; \u0111\u1ed9 b\u1ec1n n\u00e9n d\u1ecdc th\u1edb 55,7MPa; \u0111\u1ed9 b\u1ec1n k\u00e9o d\u1ecdc th\u1edb 106,9 MPa; MOR l\u00e0 91,0 MPa v\u00e0 MOE 14317,9 MPa.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Lu\u1ed3ng, tre \u00e9p kh\u1ed1i<\/td>\n<\/tr>\n

<\/a>Effects of paramets of soaking bamboo in the glue to quality pressed bamboo construction materials<\/strong><\/p>\n

Using PF glue and Luong bamboo (Dendrocalamus barbatus<\/em>) as the research material for producing pressed bamboo blocks, construction materials. With impregnated glue levels 30%, 40%, 50% and impregnation time 10 min, 15 min, 20 minutes. The research results show that, when soaking glue with 40% concentration, the time of 15 min glue soaking is optimal. The results of the physical and physical properties achieved are as follows: Volume of pressed bamboo volume is 1.2 g\/cm3<\/sup>; 12.6 MPa longitudinal slip strength; vertical compression strength of 55.7MPa; vertical tensile strength of 106.9 MPa; MOR is 91.0 MPa and MOE 14317.9 MPa.<\/p>\n

Keywords:<\/em><\/strong> Luong bamboo, pressed bamboo<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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

T\u1ea0P CH\u00cd KHOA H\u1eccC L\u00c2M NGHI\u1ec6P S\u1ed0 2 – 2019 \u00a0 1. C\u00e1c lo\u00e0i th\u1ef1c v\u1eadt b\u1ecb \u0111e d\u1ecda \u1edf Khu b\u1ea3o t\u1ed3n thi\u00ean nhi\u00ean P\u00f9 Ho\u1ea1t, t\u1ec9nh Ngh\u1ec7 An Threatened plant species in Pu Hoat Nature Reserve, Nghe An province Nguy\u1ec5n Danh H\u00f9ng Nguy\u1ec5n Th\u1ecb Ho\u00e0i Th\u01b0\u01a1ng L\u00ea Th\u1ecb H\u01b0\u01a1ng Tr\u1ea7n Minh H\u1ee3i Nguy\u1ec5n […]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[26,24],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/1622"}],"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=1622"}],"version-history":[{"count":3,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/1622\/revisions"}],"predecessor-version":[{"id":1701,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/1622\/revisions\/1701"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/media?parent=1622"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/categories?post=1622"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/tags?post=1622"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}