{"id":2232,"date":"2021-11-09T10:24:46","date_gmt":"2021-11-09T03:24:46","guid":{"rendered":"http:\/\/vafs.gov.vn\/en\/?p=2232"},"modified":"2023-11-23T12:24:51","modified_gmt":"2023-11-23T05:24:51","slug":"vietnam-journal-of-forest-science-number-5-2021","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/en\/2021\/11\/vietnam-journal-of-forest-science-number-5-2021\/","title":{"rendered":"Vietnam Journal of Forest Science Number 5-2021"},"content":{"rendered":"

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<\/a><\/a><\/a>T\u1ea0P CH\u00cd KHOA H\u1eccC L\u00c2M NGHI\u1ec6P S\u1ed0 5<\/strong> – <\/strong>20<\/strong>21<\/strong><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
1.<\/td>\nNghi\u00ean c\u1ee9u k\u1ef9 thu\u1eadt nh\u00e2n gi\u1ed1ng c\u00e2y D\u1ebb \u0111\u1ecf (Lithocarpus ducampii<\/em>
\nA. Camus) t\u1eeb h\u1ea1t<\/td>\n		Research on seed propagation of Lithocarpus ducampii<\/em> A. Camus<\/td>\n\u0110\u1eb7ng Th\u1ecbnh Tri\u1ec1u
\nV\u00f5 \u0110\u1ea1i H\u1ea3i
\nNguy\u1ec5n Anh D\u0169ng
\nD\u01b0\u01a1ng Quang Trung
\n\u0110\u00e0o Trung \u0110\u1ee9c
\nMai Th\u1ecb Linh
\nTr\u1ea7n Anh H\u1ea3i
\n\u0110\u00e0o H\u00f9ng M\u1ea1nh<\/td>\n		5<\/td>\n<\/tr>\n
2.<\/td>\nNghi\u00ean c\u1ee9u k\u1ef9 thu\u1eadt nh\u00e2n gi\u1ed1ng B\u1ea7n kh\u00f4ng c\u00e1nh (Sonneratia apetala<\/em> Buch-Ham) T\u1eeb h\u1ea1t<\/td>\nResearch on the propagation techniques of Sonneratia apetala<\/em> Buch-Ham by seed<\/td>\nL\u00ea V\u0103n Th\u00e0nh
\nT\u1ea1 V\u0103n H\u00e2n
\n\u0110\u1ed7 Th\u1ecb Kim Nhung
\nPh\u1ea1m Ng\u1ecdc Th\u00e0nh
\nNguy\u1ec5n Xu\u00e2n \u0110\u00e0i
\n\u0110o\u00e0n Thanh T\u00f9ng
\nTr\u01b0\u01a1ng Quang Tr\u00ed<\/td>\n		13<\/td>\n<\/tr>\n
3.<\/td>\nNghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng m\u1ed9t s\u1ed1 d\u00f2ng b\u1ea1ch \u0111\u00e0n lai m\u1edbi (Eucalyptus urophylla<\/em> \u00b4 Eucalyptus pellita<\/em>) UP223, UP171, UP164 b\u1eb1ng k\u1ef9 thu\u1eadt nu\u00f4i c\u1ea5y in vitro<\/td>\nIn vitro propagation techniques of new eucalyptus hybrid clones (Eucalyptus urophylla<\/em> \u00b4 Eucalyptus pellita<\/em>) UP223, UP171 and UP164<\/td>\nL\u00ea Th\u1ecb Xu\u00e2n Qu\u1ef3nh
\nKhu\u1ea5t Th\u1ecb H\u1ea3i Ninh
\nC\u1ea5n Th\u1ecb Lan
\nKi\u1ec1u Th\u1ecb H\u00e0
\nH\u00e0 Th\u1ecb L\u1ec7
\n\u0110\u1ed7 H\u1eefu S\u01a1n<\/td>\n		24<\/td>\n<\/tr>\n
4.<\/td>\nK\u1ebft qu\u1ea3 kh\u1ea3o nghi\u1ec7m h\u1eadu th\u1ebf c\u00e2y Thanh th\u1ea5t (Ailanthus triphysa<\/em> (Dennst) Alston) t\u1ea1i B\u00ecnh Ph\u01b0\u1edbc<\/td>\nResults of progeny test of Ailanthus triphysa <\/em>(Dennst) Alston in Binh Phuoc province<\/td>\nPh\u1ea1m V\u0103n B\u1ed1n
\nPh\u1ea1m Th\u1ebf D\u0169ng
\nNguy\u1ec5n V\u0103n Thi\u1ebft
\nH\u1ed3 T\u1ed1 Vi\u1ec7t
\nNinh V\u0103n Tu\u1ea5n
\nPh\u1ea1m Th\u1ecb M\u1eadn<\/td>\n		38<\/td>\n<\/tr>\n
5.<\/td>\nBi\u1ebfn d\u1ecb v\u1ec1 sinh tr\u01b0\u1edfng, s\u1ea3n l\u01b0\u1ee3ng v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng h\u1ea1t
\nm\u1eafc ca (Macadamia) kh\u1ea3o nghi\u1ec7m t\u1ea1i Th\u1ea1ch Th\u00e0nh, Thanh H\u00f3a<\/td>\n		Variation in growth, nut yield and quality of Macadamia in clonal trial
\nat Thach Thanh, Thanh Hoa province<\/td>\n		Ph\u1ea1m Thu H\u00e0
\nNguy\u1ec5n \u0110\u1ee9c Ki\u00ean
\nPhan \u0110\u1ee9c Ch\u1ec9nh
\nD\u01b0\u01a1ng H\u1ed3ng Qu\u00e2n<\/td>\n		47<\/td>\n<\/tr>\n
6.<\/td>\n\u0110\u00e1nh gi\u00e1 \u0111a d\u1ea1ng di truy\u1ec1n qu\u1ea7n th\u1ec3 B\u1ea7n kh\u00f4ng c\u00e1nh (Sonneratia apetala<\/em> Buch – Ham) \u1edf Vi\u1ec7t Nam b\u1eb1ng ch\u1ec9 th\u1ecb ISSR<\/td>\nEvaluation of genetic diversity and relationship
\nof introduced Sonneratia apetela <\/em>Buch – Ham provenances in Vietnam using ISSR markers<\/td>\n		Nguy\u1ec5n Th\u1ecb Vi\u1ec7t H\u00e0
\nL\u00ea V\u0103n Th\u00e0nh
\nNguy\u1ec5n Th\u1ecb Huy\u1ec1n
\nL\u00ea Th\u1ecb Th\u1ee7y
\nTr\u1ea7n Th\u1ecb Thu H\u00e0
\nMai Th\u1ecb Ph\u01b0\u01a1ng Th\u00fay H\u00e0 Th\u1ecb Huy\u1ec1n Ng\u1ecdc
\nT\u1ea1 V\u0103n H\u00e2n
\nL\u00ea S\u01a1n<\/td>\n		55<\/td>\n<\/tr>\n
7.<\/td>\n\u1ee8ng d\u1ee5ng m\u1ed9t s\u1ed1 m\u00e3 v\u1ea1ch ADN trong ph\u00e2n t\u00edch quan h\u1ec7 di truy\u1ec1n v\u00e0 \u0111\u1ecbnh danh m\u1ed9t s\u1ed1 lo\u00e0i gi\u1ed5i t\u1ea1i Gia Lai<\/td>\nUsing DNA barcodes to evaluate genetic relationship of Michelia species in
\nGia Lai<\/td>\n		Nguy\u1ec5n Th\u1ecb Huy\u1ec1n
\nMai Th\u1ecb Ph\u01b0\u01a1ng Th\u00fay
\nTr\u1ea7n Th\u1ecb Thu H\u00e0
\nL\u00ea Th\u1ecb Th\u1ee7y
\nNguy\u1ec5n Th\u1ecb Vi\u1ec7t H\u00e0
\nH\u00e0 Huy\u1ec1n Ng\u1ecdc
\nTr\u1ea7n Cao Nguy\u00ean
\nTri\u1ec7u Th\u00e1i H\u01b0ng
\nNinh Vi\u1ec7t Kh\u01b0\u01a1ng
\nTr\u1ea7n Ho\u00e0ng Qu\u00fd
\nPh\u1ea1m Ti\u1ebfn B\u1eb1ng
\nL\u00ea Vi\u1ec7t D\u0169ng
\nNguy\u1ec5n Tr\u00ed B\u1ea3o
\nL\u00ea S\u01a1n<\/td>\n		63<\/td>\n<\/tr>\n
8.<\/td>\nNghi\u00ean c\u1ee9u t\u00e1i sinh t\u1ef1 nhi\u00ean c\u1ee7a \u0110\u01b0\u1edbc \u0111\u00f4i (Rhizophora apiculata<\/em> Blum) \u1edf c\u00e1c c\u1ea5p tu\u1ed5i r\u1eebng t\u1ea1i t\u1ec9nh B\u1ebfn Tre<\/td>\nResearch on the natural regeneration of Rhizophora apiculata<\/em> Blum at different forest ages in Ben Tre province<\/td>\nHo\u00e0ng V\u0103n Th\u01a1i
\nL\u00ea Thanh Quang
\nNguy\u1ec5n Kh\u1eafc \u0110i\u1ec7u<\/td>\n		71<\/td>\n<\/tr>\n
9.<\/td>\nNghi\u00ean c\u1ee9u \u0111\u1eb7c \u0111i\u1ec3m sinh tr\u01b0\u1edfng r\u1eebng \u0110\u01b0\u1edbc (Rhizophora apiculata<\/em> Blume) tr\u1ed3ng tr\u00ean c\u00e1c l\u1eadp \u0111\u1ecba ch\u00ednh t\u1ea1i B\u1ebfn Tre<\/td>\nResearch on growth characteristics of Rhizophora apiculata<\/em> Blume at planted sites in Ben Tre province<\/td>\nHo\u00e0ng V\u0103n Th\u01a1i
\nL\u00ea Thanh Quang
\nNguy\u1ec5n Kh\u1eafc \u0110i\u1ec7u
\nVi\u00ean Ng\u1ecdc Tu\u1ea5n Anh<\/td>\n		81<\/td>\n<\/tr>\n
10.<\/td>\nHi\u1ec7n tr\u1ea1ng v\u00e0 \u0111\u1eb7c \u0111i\u1ec3m l\u00e2m h\u1ecdc c\u1ee7a lo\u00e0i Tr\u1eafc (Dalbergia cochinchinensis<\/em> Pierre Ex Laness.) t\u1ea1i Gia Lai<\/td>\nThe present status and silvicultural characteristics of Dalbergia cochinchinensis<\/em> Pierre Ex Laness in Gia Lai provinces<\/td>\nTr\u1ea7n Cao Nguy\u00ean
\nPhan V\u0103n M\u00f9i
\nTri\u1ec7u Th\u00e1i H\u01b0ng
\n\u0110\u1ed7 Th\u1ecb Thanh H\u00e0
\nHo\u00e0ng Thanh S\u01a1n
\nNinh Vi\u1ec7t Kh\u01b0\u01a1ng
\nTr\u1ea7n H\u1ea3i Long
\nPh\u00ed H\u1ed3ng H\u1ea3i<\/td>\n		93<\/td>\n<\/tr>\n
11.<\/td>\nNghi\u00ean c\u1ee9u c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m c\u1ea5u tr\u00fac r\u1eebng t\u1ef1 nhi\u00ean c\u00f3 S\u1ea5u t\u00eda (Sandoricum indicum<\/em> Cav.) ph\u00e2n b\u1ed1<\/td>\nResearch the structure characteristics of natural forest with Sandoricum indicum<\/em> Cav. distribution<\/td>\nNguy\u1ec5n Ki\u00ean C\u01b0\u1eddng
\nPh\u00f9ng V\u0103n T\u1ec9nh
\nV\u00f5 \u0110\u1ea1i H\u1ea3i
\nNguy\u1ec5n Minh Thanh
\nPh\u1ea1m V\u0103n H\u01b0\u1eddng
\nL\u00ea H\u1ed3ng Vi\u1ec7t<\/td>\n		105<\/td>\n<\/tr>\n
12.<\/td>\nNghi\u00ean c\u1ee9u c\u1ea3i t\u1ea1o \u0111\u1ea5t b\u00e3i th\u1ea3i khai th\u00e1c m\u1ecf \u0111\u1ed3ng t\u1ec9nh L\u00e0o Cai b\u1eb1ng tr\u1ed3ng c\u00e2y \u0110\u1eadu d\u1ea7u (Pongamia pinnata<\/em>) k\u1ebft h\u1ee3p b\u00f3n nhi\u1ec5m n\u1ea5m r\u1ec5 n\u1ed9i c\u1ed9ng sinh AM (Arbuscular mycorrhiza<\/em>) \u1edf v\u01b0\u1eddn \u01b0\u01a1m<\/td>\nResearch conditioning copper mining waste soil by plant Pongamia pinnata <\/em>combined inoculums Arbuscular mycorrhiza<\/em>
\nin nursery<\/td>\n		V\u0169 Qu\u00fd \u0110\u00f4ng
\nH\u00e0 Th\u1ecb Hi\u1ec1n
\nL\u00ea Th\u1ecb Thu H\u1eb1ng
\nH\u00e0 Th\u1ecb Mai
\nPh\u1ea1m Th\u1ecb Ng\u00e2n<\/td>\n		118<\/td>\n<\/tr>\n
13.<\/td>\nNghi\u00ean c\u1ee9u \u1ea3nh h\u01b0\u1edfng c\u1ee7a \u0111i\u1ec1u ki\u1ec7n nu\u00f4i c\u1ea5y \u0111\u1ebfn sinh tr\u01b0\u1edfng c\u1ee7a b\u1ed1n ch\u1ee7ng vi khu\u1ea9n ph\u00e2n gi\u1ea3i xenlulo<\/td>\nResearch on affects of submerged culture conditions to growth of four strains of cellulolytic bacteria<\/td>\nV\u0169 V\u0103n \u0110\u1ecbnh
\nNguy\u1ec5n Th\u1ecb Loan
\nPh\u1ea1m V\u0103n Nh\u1eadt
\nTr\u00e2\u0300n Nh\u00e2\u0323t T\u00e2n<\/td>\n		130<\/td>\n<\/tr>\n
14.<\/td>\nNghi\u00ean c\u1ee9u \u1ee9ng d\u1ee5ng ch\u1ebf ph\u1ea9m sinh h\u1ecdc ph\u00e2n h\u1ee7y nhanh v\u1eadt li\u1ec7u ch\u00e1y d\u01b0\u1edbi t\u00e1n r\u1eebng th\u00f4ng \u1edf S\u00f3c S\u01a1n,
\nH\u00e0 N\u1ed9i v\u00e0 Ho\u00e0nh B\u1ed3, Qu\u1ea3ng Ninh<\/td>\n		Research on the application of biological products that quickly decompose combustible materials under the pine forests canopy in Soc Son, Ha Noi and Hoang Bo, Quang Ninh<\/td>\nV\u0169 V\u0103n \u0110\u1ecbnh
\nNguy\u1ec5n Th\u1ecb Loan
\nL\u00ea Th\u00e0nh C\u00f4ng
\nTr\u1ea7n Nh\u1eadt T\u00e2n v\u00e0 Ph\u1ea1m V\u0103n Nh\u1eadt<\/td>\n		137<\/td>\n<\/tr>\n
15.<\/td>\nNghi\u00ean c\u1ee9u \u1ea3nh h\u01b0\u1edfng c\u1ee7a m\u1ed9t s\u1ed1 y\u1ebfu t\u1ed1 sinh th\u00e1i \u0111\u1ebfn m\u1ee9c \u0111\u1ed9 b\u1ecb S\u00e2u \u0111\u1ee5c n\u00f5n (Hypsipyla robusta<\/em>) g\u00e2y h\u1ea1i tr\u00ean r\u1eebng tr\u1ed3ng L\u00e1t hoa<\/td>\nAssessing the impacts of ecological factors on the damage of Hypsipyla robusta<\/em> in Chukrasia tabularis<\/em> plantations<\/td>\nTr\u1ea7n Th\u1ecb L\u1ec7 Tr\u00e0
\nPh\u1ea1m Quang Thu
\nNguy\u1ec5n Minh Ch\u00ed<\/td>\n		145<\/td>\n<\/tr>\n
16.<\/td>\nCurrent status and measutes to promote sustainable management of household plantation in Quang Tri province<\/td>\nTh\u1ef1c tr\u1ea1ng v\u00e0 c\u00e1c gi\u1ea3i ph\u00e1p th\u00fac \u0111\u1ea9y qu\u1ea3n l\u00fd r\u1eebng tr\u1ed3ng b\u1ec1n v\u1eefng quy m\u00f4 h\u1ed9 gia \u0111\u00ecnh \u1edf t\u1ec9nh Qu\u1ea3ng Tr\u1ecb<\/td>\nNguyen Hoang Tiep
\nVo Dai Nguyen
\nNguyen Cong Phuong<\/td>\n		157<\/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

<\/a>NGHI\u00caN C\u1ee8U K\u1ef8 THU\u1eacT NH\u00c2N GI\u1ed0NG\u00a0C\u00c2Y D\u1eba \u0110\u1ece (Lithocarpus ducampii<\/em> A. Camus) T\u1eea H\u1ea0T<\/p>\n

<\/a>\u0110\u1eb7ng Th\u1ecbnh Tri\u1ec1u2<\/sup>, V\u00f5 \u0110\u1ea1i H\u1ea3i1<\/sup>, Nguy\u1ec5n Anh D\u0169ng3<\/sup>, D\u01b0\u01a1ng Quang Trung2<\/sup>,
\n\u0110\u00e0o Trung \u0110\u1ee9c2<\/sup>, Mai Th\u1ecb Linh2<\/sup>, Tr\u1ea7n Anh H\u1ea3i2<\/sup>, \u0110\u00e0o H\u00f9ng M\u1ea1nh3<\/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 L\u00e2m sinh
\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

D\u1ebb \u0111\u1ecf (Lithocarpus ducampii<\/em> A. Camus) thu\u1ed9c h\u1ecd D\u1ebb (Fagaceae), l\u00e0 c\u00e2y b\u1ea3n \u0111\u1ecba, m\u1ecdc nhanh, l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh, ph\u00e2n b\u1ed1 \u1edf c\u00e1c t\u1ec9nh v\u00f9ng n\u00fai ph\u00eda B\u1eafc. D\u1ebb \u0111\u1ecf l\u00e0 c\u00e2y g\u1ed7 l\u1edbn, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho nhi\u1ec1u m\u1ee5c \u0111\u00edch kh\u00e1c nhau n\u00ean c\u00f3 gi\u00e1 tr\u1ecb kinh t\u1ebf cao v\u00e0 r\u1ea5t c\u00f3 tri\u1ec3n v\u1ecdng cho tr\u1ed3ng r\u1eebng v\u00e0 ph\u1ee5c h\u1ed3i r\u1eebng t\u1ef1 nhi\u00ean. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u k\u1ef9 thu\u1eadt nh\u00e2n gi\u1ed1ng D\u1ebb \u0111\u1ecf t\u1eeb h\u1ea1t cho th\u1ea5y: H\u1ea1t D\u1ebb \u0111\u1ecf kh\u00f4ng c\u1ea7n x\u1eed l\u00fd m\u00e0 c\u00f3 th\u1ec3 gieo ngay sau khi thu h\u00e1i. H\u1ea1t D\u1ebb \u0111\u1ecf b\u1ea3o qu\u1ea3n trong t\u00fai nilon k\u00edn \u1edf nhi\u1ec7t \u0111\u1ed9 5 – 8o<\/sup>C, sau 4 th\u00e1ng h\u1ea1t v\u1eabn cho t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m 80,0%. Th\u00e0nh ph\u1ea7n ru\u1ed9t b\u1ea7u t\u1ed1t nh\u1ea5t cho c\u00e2y con l\u00e0 99,5% \u0111\u1ea5t t\u1ea7ng m\u1eb7t + 0,5% ph\u00e2n NPK (12:5:10). Trong giai \u0111o\u1ea1n v\u01b0\u1eddn \u01b0\u01a1m, c\u1ea7n che 50% \u00e1nh s\u00e1ng \u0111\u1ec3 D\u1ebb \u0111\u1ecf cho t\u1ef7 l\u1ec7 s\u1ed1ng v\u00e0 sinh tr\u01b0\u1edfng t\u1ed1t nh\u1ea5t.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> D\u1ebb \u0111\u1ecf, nh\u00e2n gi\u1ed1ng, b\u1ea3o qu\u1ea3n h\u1ea1t, x\u1eed l\u00fd h\u1ea1t, che s\u00e1ng, th\u00e0nh ph\u1ea7n ru\u1ed9t b\u1ea7u<\/td>\n<\/tr>\n

\n

<\/a>Research on seed propagation of Lithocarpus ducampii<\/em> A. Camus<\/strong><\/p>\n

Lithocarpus ducampii <\/em>is a species of Fagaceae family, that is native to some Northern provinces in Vietnam. It is a large timber tree, and its wood are used for various purposes. It is a potential species for afforestation and rehabilitation. This study is in order to examine some technical methods to produce seedlings such as seed storage, potting medium and light regime in nursery stage. The results showed that the seeds can be stored in sealed plastic bag at 5 – 8o<\/sup>C up to 4 months with the germination rate reached to 80%. There is no pre-treatment is required for the seed before sowing. The best potting medium was 99.5% of top soils and 0.05% NPK (12:5:10) fertilizer. At the nursery stage, shading of 50% from direct light were recommended.<\/p>\n

Keywords:<\/em><\/strong> Seed propagation, Lithocarpus ducampii <\/em>A. Camus, seed storage, seed treatment, potting medium, light regime<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U K\u1ef8 THU\u1eacT NH\u00c2N GI\u1ed0NG\u00a0B\u1ea6N KH\u00d4NG C\u00c1NH (Sonneratia apetala <\/em>Buch-Ham) T\u1eea H\u1ea0T<\/p>\n

<\/a>L\u00ea V\u0103n Th\u00e0nh, T\u1ea1 V\u0103n H\u00e2n, \u0110\u1ed7 Th\u1ecb Kim Nhung, Ph\u1ea1m Ng\u1ecdc Th\u00e0nh,
\nNguy\u1ec5n Xu\u00e2n \u0110\u00e0i, \u0110o\u00e0n Thanh T\u00f9ng, Tr\u01b0\u01a1ng Quang Tr\u00ed\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/sup><\/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

B\u1ea7n kh\u00f4ng c\u00e1nh l\u00e0 lo\u00e0i c\u00e2y ng\u1eadp m\u1eb7n nh\u1eadp n\u1ed9i, sinh tr\u01b0\u1edfng nhanh, c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu l\u1ea1nh, \u0111\u01b0\u1ee3c \u0111\u01b0a v\u1ec1 nh\u00e2n gi\u1ed1ng v\u00e0 g\u00e2y tr\u1ed3ng \u1edf v\u00f9ng ven bi\u1ec3n B\u1eafc B\u1ed9 v\u00e0o n\u0103m 1995 v\u00e0 n\u0103m 2003. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u k\u1ef9 thu\u1eadt nh\u00e2n gi\u1ed1ng B\u1ea7n kh\u00f4ng c\u00e1nh b\u1eb1ng h\u1ea1t cho th\u1ea5y: B\u1ea3o qu\u1ea3n h\u1ea1t gi\u1ed1ng b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p \u201cCho c\u1ea3 qu\u1ea3 ch\u00edn v\u00e0o bao t\u1ea3i ng\u00e2m \u1edf n\u01a1i lu\u00f4n lu\u00f4n b\u1ecb ng\u1eadp trong n\u01b0\u1edbc bi\u1ec3n c\u00f3 \u0111\u1ed9 m\u1eb7n \u2264 10,0\u2030\u201d cho th\u1eddi gian b\u1ea3o qu\u1ea3n h\u1ea1t l\u00e2u nh\u1ea5t (< 8 th\u00e1ng) v\u00e0 t\u1ef7 l\u1ec7 h\u1ea1t n\u1ea3y m\u1ea7m cao nh\u1ea5t. X\u1eed l\u00fd h\u1ea1t gi\u1ed1ng b\u1eb1ng \u201cng\u00e2m h\u1ea1t trong n\u01b0\u1edbc \u1ea5m 400<\/sup>C trong th\u1eddi gian 8 gi\u1edd, v\u1edbt ra r\u1eeda s\u1ea1ch, cho h\u1ea1t v\u00e0o t\u00fai v\u1ea3i \u1ea9m \u0111em \u1ee7 3 – 5 ng\u00e0y, r\u1eeda chua h\u00e0ng ng\u00e0y, khi th\u1ea5y h\u1ea1t n\u1ee9t nanh \u0111em gieo\u201d cho t\u1ef7 l\u1ec7 h\u1ea1t n\u1ea3y m\u1ea7m cao nh\u1ea5t, th\u1eddi gian n\u1ea3y m\u1ea7m ng\u1eafn nh\u1ea5t. C\u1ea5y c\u00e2y m\u1ea1 c\u00f3 chi\u1ec1u cao 5 – 10 cm t\u1eeb lu\u1ed1ng gieo v\u00e0o b\u1ea7u cho t\u1ef7 l\u1ec7 s\u1ed1ng cao nh\u1ea5t. C\u00f3 th\u1ec3 s\u1eed d\u1ee5ng th\u00e0nh ph\u1ea7n h\u1ed7n h\u1ee3p ru\u1ed9t b\u1ea7u l\u00e0 \u201c100% b\u00f9n ch\u1eb7t l\u1ea5y \u1edf l\u1edbp m\u1eb7t, s\u00e2u t\u1eeb 0 – 20 cm n\u01a1i ng\u1eadp m\u1eb7n\u201d ho\u1eb7c \u201c90% b\u00f9n ch\u1eb7t l\u1ea5y \u1edf l\u1edbp m\u1eb7t n\u01a1i ng\u1eadp m\u1eb7n + 9% ph\u00e2n h\u1eefu c\u01a1 vi sinh + 1% Supe l\u00e2n\u201d cho t\u1ef7 l\u1ec7 s\u1ed1ng t\u01b0\u01a1ng \u0111\u01b0\u01a1ng nhau, th\u00e0nh ph\u1ea7n ru\u1ed9t b\u1ea7u c\u00f3 b\u1ed5 sung ph\u00e2n h\u1eefu c\u01a1 vi sinh v\u00e0 supe l\u00e2n cho sinh tr\u01b0\u1edfng c\u1ee7a c\u00e2y con cao h\u01a1n.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> B\u1ea7n kh\u00f4ng c\u00e1nh, c\u00e2y ng\u1eadp m\u1eb7n, nh\u00e2n gi\u1ed1ng, sinh tr\u01b0\u1edfng<\/td>\n<\/tr>\n

\n

<\/a>Research on the propagation techniques of Sonneratia apetala<\/em> Buch-Ham by seed<\/strong><\/p>\n

Sonneratia apetala<\/em> Buch-Ham is an imported, fast-growing, cold-tolerant mangrove species introduced to the northern coastal areas in 1995 and 2003 for propagation and plantation. Research on the propagation techniques of Sonneratia apetala<\/em> Buch-Ham showed that: Seed preservation with the method of \u201cPutting the whole ripe fruit in a sack and soaking at permanently flooded seawater areas with the salinity \u2264 10.0\u2030\u201d resulted in the longest maintenance time (< 8 months) and the highest percentage of seed germination rate. Seed processing by \u201cSoaking the seeds in warm water at 40o<\/sup>C for 8 hours, taking out and washing, then incubating in a damp cloth bag for 3 – 5 days with sour washing on a daily basis, until the seeds are cracked, the sowing will be implemented\u201d. This method provided the highest seed germination rate and shortest germination time. Transplanting seedlings with a height of 5 – 10 cm from the sowing beds to the pots gave the highest survival rate. The mixed composition in the pot can be used as \u201c100% mud taken from the surface layer, from 0 – 20 cm deep in mangrove areas\u201d or \u201c90% mud taken from the surface layer of mangroves + 9% organic fertilizer + 1% Superphosphate\u201d gave the same survival rate. The growth of seedlings was higher in the composition with the addition of microbial organic fertilizer and superphosphate.<\/p>\n

Keywords:<\/em><\/strong> Sonneratia apetala<\/em> Buch-Ham, mangroves tree, propagation, growth<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U NH\u00c2N GI\u1ed0NG M\u1ed8T S\u1ed0 D\u00d2NG B\u1ea0CH \u0110\u00c0N LAI M\u1edaI (Eucalyptus urophylla<\/em> \u00b4 Eucalyptus pellita)<\/em> UP223, UP171, UP164\u00a0B\u1eb0NG K\u1ef8 THU\u1eacT NU\u00d4I C\u1ea4Y IN VITRO<\/em><\/p>\n

<\/a>L\u00ea Th\u1ecb Xu\u00e2n Qu\u1ef3nh1<\/sup>, Khu\u1ea5t Th\u1ecb H\u1ea3i Ninh3<\/sup>, C\u1ea5n Th\u1ecb Lan1<\/sup>
\nKi\u1ec1u Th\u1ecb H\u00e01<\/sup>, H\u00e0 Th\u1ecb L\u1ec71<\/sup>, \u0110\u1ed7 H\u1eefu S\u01a1n2<\/sup><\/p>\n

1 <\/sup>Trung t\u00e2m Th\u1ef1c nghi\u1ec7m v\u00e0 Chuy\u1ec3n giao gi\u1ed1ng c\u00e2y r\u1eebng
\n– Vi\u1ec7n Nghi\u00ean c\u1ee9u Gi\u1ed1ng v\u00e0 C\u00f4ng ngh\u1ec7 Sinh h\u1ecdc L\u00e2m nghi\u1ec7p
\n2<\/sup>Vi\u1ec7n Nghi\u00ean c\u1ee9u Gi\u1ed1ng v\u00e0 C\u00f4ng ngh\u1ec7 Sinh h\u1ecdc L\u00e2m nghi\u1ec7p
\n3<\/sup>Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Nghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng c\u00e1c d\u00f2ng b\u1ea1ch \u0111\u00e0n lai m\u1edbi (Eucalyptus urophylla<\/em> \u00b4 Eucalyptus pellita)<\/em> UP223, UP171, UP164 b\u1eb1ng k\u1ef9 thu\u1eadt nu\u00f4i c\u1ea5y in vitro<\/em> gi\u00fap \u0111\u01b0a nhanh c\u00e1c gi\u1ed1ng m\u1edbi \u0111\u01b0\u1ee3c ch\u1ecdn t\u1ea1o v\u00e0o s\u1ea3n xu\u1ea5t. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u giai \u0111o\u1ea1n kh\u1eed tr\u00f9ng t\u1ea1o m\u1eabu s\u1ea1ch in vitro<\/em> v\u00e0 nh\u00e2n nhanh ch\u1ed3i c\u1ee7a ba d\u00f2ng b\u1ea1ch \u0111\u00e0n lai cho th\u1ea5y: Kh\u1eed tr\u00f9ng m\u1eabu b\u1eb1ng dung d\u1ecbch HgCl2<\/sub> 0,05% trong th\u1eddi gian 6 ph\u00fat cho t\u1ef7 l\u1ec7 m\u1eabu b\u1eadt ch\u1ed3i h\u1eefu hi\u1ec7u cao nh\u1ea5t v\u1edbi 3 d\u00f2ng b\u1ea1ch \u0111\u00e0n lai l\u1ea7n l\u01b0\u1ee3t l\u00e0 32,6%; 34,4% v\u00e0 31,2%; kh\u1eed tr\u00f9ng m\u1eabu b\u1eb1ng dung d\u1ecbch javen 2,5% trong th\u1eddi gian 8 ph\u00fat cho t\u1ef7 l\u1ec7 m\u1eabu b\u1eadt ch\u1ed3i h\u1eefu hi\u1ec7u t\u01b0\u01a1ng \u1ee9ng l\u00e0 20,4%; 21,1% v\u00e0 19,5%. H\u1ec7 s\u1ed1 nh\u00e2n ch\u1ed3i (HSNC) cao nh\u1ea5t \u0111\u1ea1t \u0111\u01b0\u1ee3c trong m\u00f4i tr\u01b0\u1eddng MS* + 0,5 mg\/l BAP + 0,5 mg\/l Kinetin (d\u00f2ng UP223 c\u00f3 h\u1ec7 s\u1ed1 nh\u00e2n ch\u1ed3i l\u00e0 2,84 l\u1ea7n v\u00e0 chi\u1ec1u cao ch\u1ed3i \u0111\u1ea1t 2,87 cm; d\u00f2ng UP171 c\u00f3 c\u00e1c ch\u1ec9 ti\u00eau t\u01b0\u01a1ng \u1ee9ng 2,93 l\u1ea7n v\u00e0 2,98 cm; d\u00f2ng UP164 c\u00f3 c\u00e1c ch\u1ec9 ti\u00eau t\u01b0\u01a1ng \u1ee9ng l\u00e0 2,77 l\u1ea7n v\u00e0 2,75 cm). M\u00f4i tr\u01b0\u1eddng ra r\u1ec5 th\u00edch h\u1ee3p cho d\u00f2ng b\u1ea1ch \u0111\u00e0n UP223 l\u00e0 1\/2 MS* <\/sup>+ 30 g\/l \u0111\u01b0\u1eddng + 5,5 g\/l Agar +1,5 mg\/l IBA + 0,75 mg\/l ABT + 100 mg\/l AC (than ho\u1ea1t t\u00ednh) cho t\u1ef7 l\u1ec7 ch\u1ed3i ra r\u1ec5 \u0111\u1ea1t 88,9% v\u00e0 s\u1ed1 r\u1ec5 trung b\u00ecnh \/ch\u1ed3i l\u00e0 3,88. D\u00f2ng UP171 v\u00e0 UP164 l\u00e0 1\/2 MS* <\/sup>+ 30 g\/l \u0111\u01b0\u1eddng + 5,5 g\/l Agar + 1,5 mg\/l IBA + 0,5 mg\/l ABT + 100 mg\/l AC cho t\u1ef7 l\u1ec7 ch\u1ed3i ra r\u1ec5 l\u00e0 90% v\u00e0 s\u1ed1 r\u1ec5 trung b\u00ecnh\/ch\u1ed3i l\u00e0 3,91. Th\u1eddi gian hu\u1ea5n luy\u1ec7n c\u00e2y m\u1ea7m tr\u01b0\u1edbc khi cho ra v\u01b0\u1eddn \u01b0\u01a1m l\u00e0 15 ng\u00e0y v\u1edbi t\u1ef7 l\u1ec7 c\u00e2y s\u1ed1ng \u0111\u1ea1t t\u1eeb 85,6 – 88,9%, l\u01b0\u1ee3ng t\u0103ng tr\u01b0\u1edfng chi\u1ec1u cao t\u1eeb 5,03 – 5,22 cm.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> B\u1ea1ch \u0111\u00e0n lai, k\u1ef9 thu\u1eadt nu\u00f4i c\u1ea5y in vitro<\/em><\/td>\n<\/tr>\n

\n

<\/a>In vitro<\/em> propagation techniques of new eucalyptus hybrid clones (Eucalyptus urophylla<\/em> \u00b4 Eucalyptus pellita<\/em>) UP223, UP171 and UP164<\/strong><\/p>\n

Study on propagating of new eucalyptus hybrid clones (Eucalyptus urophylla<\/em> \u00b4 Eucalyptus pellita<\/em>) UP223, UP171 and UP164 by in vitro<\/em> propagation techniques was investigated. The results have the potential to contribute to completing the process of selecting and creating new Eucalyptus hybrids. The results of the research on sterilization phase to produce in vitro<\/em> clean samples and rapidly multiply shoots of three eucalyptus hybrid clones showed that: sterilization of samples with 0.05% HgCl2<\/sub> in 6 minutes provided the highest effective rate of shoots with all eucalyptus lines. The effective budding of UP223, UP171 and UP164 were 32.6%; 34.4% and 31.2% respectively; while sample sterilization with 2.5% javen in 8 minutes archieved 20.4%; 21.1% and 19.5% respectively. Effective shoots were regenerated in modified Murashige and Skoog medium (MS*) supplemented in MS* + 0.5 mg\/l BAP + 0.5 mg\/l kinetin (shoot mutilplier of UP223 was 2.84 while average shoot hight was 2.87cm; these values for UP171 line were 2.93 and 2.98 cm, respectively. The shoot mutilplier and average shoot hight of UP164 line were 2.77 and 2.75 cm, respectively). The suitable rooting medium for UP223 line was 1\/2 MS* + 30 g\/l sugar + 5.5 g\/l Agar +1.5 mg\/l IBA + 0.75 mg\/l ABT + 100 mg\/l AC (actived charcoal) to get the rooting rate of 88.9% and the number of roots\/buds was 3.88. Medium for UP171 and UP164 lines were 1\/2 MS* + 30 g\/l sugar + 5.5 g\/l Agar + 1.5 mg\/l IBA + 0.5 mg\/l ABT + 100 mg\/l AC to have 90% rooting rate and number of roots\/buds was 3.91. The nursering time was 15 days with the survival rate from 85.6 – 88.9%, the height growth reached 5.03 – 5.22 cm.<\/p>\n

Keywords:<\/em><\/strong> Eucalyptus hybrid, in vitro<\/em> propagation techniques<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>K\u1ebeT QU\u1ea2 KH\u1ea2O NGHI\u1ec6M H\u1eacU TH\u1ebeC\u00c2Y THANH TH\u1ea4T (Ailanthus triphysa<\/em> (Dennst) <\/em>Alston)
\nT\u1ea0I B\u00ccNH PH\u01af\u1edaC<\/p>\n

<\/a>Ph\u1ea1m V\u0103n B\u1ed1n1<\/sup>, Ph\u1ea1m Th\u1ebf D\u0169ng2<\/sup>, Nguy\u1ec5n V\u0103n Thi\u1ebft3<\/sup>,
\nH\u1ed3 T\u1ed1 Vi\u1ec7t1<\/sup>, Ninh V\u0103n Tu\u1ea5n1<\/sup>, Ph\u1ea1m Th\u1ecb M\u1eadn1<\/sup><\/p>\n

1<\/sup>Trung t\u00e2m \u1ee8ng d\u1ee5ng Khoa h\u1ecdc K\u1ef9 thu\u1eadt L\u00e2m nghi\u1ec7p Nam B\u1ed9
\n2<\/sup>H\u1ed9i Khoa h\u1ecdc K\u1ef9 thu\u1eadt L\u00e2m nghi\u1ec7p TP. H\u1ed3 Ch\u00ed Minh
\n3<\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Nam B\u1ed9<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Nghi\u00ean c\u1ee9u nh\u1eb1m ch\u1ecdn ra m\u1ed9t s\u1ed1 gi\u1ed1ng Thanh th\u1ea5t (xu\u1ea5t x\u1ee9, gia \u0111\u00ecnh) c\u00f3 tri\u1ec3n v\u1ecdng ph\u1ee5c v\u1ee5 cho tr\u1ed3ng r\u1eebng c\u00e2y g\u1ed7 l\u1edbn t\u1ea1i khu v\u1ef1c \u0110\u00f4ng Nam B\u1ed9. Th\u00ed nghi\u1ec7m \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf theo h\u00e0ng – c\u1ed9t ng\u1eabu nhi\u00ean, v\u1edbi 10 l\u1ea7n l\u1eb7p l\u1ea1i, 4 c\u00e2y\/h\u00e0ng. V\u1eadt li\u1ec7u gi\u1ed1ng \u0111\u01b0a v\u00e0o kh\u1ea3o nghi\u1ec7m l\u00e0 42 gia \u0111\u00ecnh c\u00e2y tr\u1ed9i t\u1eeb 7 xu\u1ea5t x\u1ee9 trong n\u01b0\u1edbc. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u \u0111\u00e3 cho th\u1ea5y, c\u00e1c xu\u1ea5t x\u1ee9 v\u00e0 gia \u0111\u00ecnh Thanh th\u1ea5t \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o kh\u1ea3o nghi\u1ec7m \u0111\u1ec1u c\u00f3 kh\u1ea3 n\u0103ng th\u00edch \u1ee9ng t\u1ed1t v\u1edbi \u0111i\u1ec1u ki\u1ec7n l\u1eadp \u0111\u1ecba n\u01a1i kh\u1ea3o nghi\u1ec7m. \u1ede tu\u1ed5i 5, h\u1ea7u h\u1ebft c\u00e1c xu\u1ea5t x\u1ee9, gia \u0111\u00ecnh \u0111\u1ec1u c\u00f3 t\u1ef7 l\u1ec7 s\u1ed1ng t\u01b0\u01a1ng \u0111\u1ed1i cao (> 80%). Sinh tr\u01b0\u1edfng \u0111\u00e3 c\u00f3 s\u1ef1 ph\u00e2n h\u00f3a r\u1ea5t r\u00f5 r\u00e0ng gi\u1eefa c\u00e1c xu\u1ea5t x\u1ee9 ho\u1eb7c gi\u1eefa c\u00e1c gia \u0111\u00ecnh. Qua \u0111\u00f3, \u0111\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c 1 xu\u1ea5t x\u1ee9 Thanh th\u1ea5t (xu\u1ea5t x\u1ee9 Tuy\u00ean Quang) c\u00f3 tri\u1ec3n v\u1ecdng, n\u0103ng su\u1ea5t v\u01b0\u1ee3t 15% so v\u1edbi gi\u00e1 tr\u1ecb trung b\u00ecnh c\u1ee7a c\u1ea3 kh\u1ea3o nghi\u1ec7m; 4 gia \u0111\u00ecnh c\u00f3 tri\u1ec3n v\u1ecdng l\u00e0 TQ6, \u0110N13, VP6 v\u00e0 \u0110N11, n\u0103ng su\u1ea5t v\u01b0\u1ee3t so v\u1edbi gi\u00e1 tr\u1ecb trung b\u00ecnh to\u00e0n kh\u1ea3o nghi\u1ec7m 30 – 52%. C\u00e1c ch\u1ec9 s\u1ed1 v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng th\u00e2n c\u00e2y \u1edf th\u1eddi \u0111i\u1ec3m hi\u1ec7n t\u1ea1i nh\u00ecn chung l\u00e0 th\u1ea5p, tuy nhi\u00ean xu\u1ea5t x\u1ee9 v\u00e0 nh\u1eefng gia \u0111\u00ecnh c\u00f3 tri\u1ec3n v\u1ecdng \u0111\u1ec1u t\u01b0\u01a1ng \u0111\u1ed1i t\u1ed1t. M\u1ee9c \u0111\u1ed9 b\u1ec7nh h\u1ea1i \u1edf th\u1eddi \u0111i\u1ec3m hi\u1ec7n t\u1ea1i l\u00e0 kh\u00f4ng \u0111\u00e1ng k\u1ec3, m\u1ed9t s\u1ed1 xu\u1ea5t x\u1ee9, gia \u0111\u00ecnh xu\u1ea5t hi\u1ec7n b\u1ec7nh m\u1ee5c v\u1ecf nh\u01b0ng v\u1edbi m\u1ee9c \u0111\u1ed9 th\u1ea5p (< 5% theo xu\u1ea5t x\u1ee9 v\u00e0 < 15% theo gia \u0111\u00ecnh).<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Gia \u0111\u00ecnh, kh\u1ea3o nghi\u1ec7m h\u1eadu th\u1ebf, Thanh th\u1ea5t, xu\u1ea5t x\u1ee9<\/td>\n<\/tr>\n

\n

Results of progeny test of Ailanthus triphysa<\/em> (Dennst) Alston in Binh Phuoc province<\/strong><\/p>\n

This study aimed to select prospect A. triphysa<\/em> cultivars (provenances and families) for sawlog wood plantation in the Southeast region, Vietnam. The experiment was designed as randomized column-row with 10 replicates, 4 trees in a line. Studied materials were collected from 42 plus trees of 7 domestic provenances. The results indicated that almost the tested provenances and families revealed good adaptability to the study site. At age 5, all provenances and families had high survival rate (over 80%). Tree growth rate was significantly different among provenances or among families. We determined one promising provenance (Tuyen Quang) with 15% advanced productivity compared with mean value of entire trial as well as four good families (TQ6, \u0110N13, VP6, \u0110N11) in which productivity was more than 30 – 52% higher than the mean value of the trial. Parameters in term of stem quality at measuring time was poor, however superior provenance and families were good. Bark canker symptom was observed in some families of some provenances but only low level (less than 5% and 15% for provenance and family level, respectively).<\/p>\n

Keywords:<\/em><\/strong> Family, progeny trial, Ailanthus triphysa<\/em>, provenance<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>BI\u1ebeN D\u1eca V\u1ec0 SINH TR\u01af\u1edeNG, S\u1ea2N L\u01af\u1ee2NG V\u00c0 CH\u1ea4T L\u01af\u1ee2NG\u00a0H\u1ea0T M\u1eaeC CA (Macadamia) KH\u1ea2O NGHI\u1ec6M\u00a0T\u1ea0I TH\u1ea0CH TH\u00c0NH, THANH H\u00d3A<\/p>\n

<\/a>Ph\u1ea1m Thu H\u00e01<\/sup>, Nguy\u1ec5n \u0110\u1ee9c Ki\u00ean2<\/sup>, Phan \u0110\u1ee9c Ch\u1ec9nh2<\/sup>, D\u01b0\u01a1ng H\u1ed3ng Qu\u00e2n2<\/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 Gi\u1ed1ng v\u00e0 C\u00f4ng ngh\u1ec7 sinh h\u1ecdc L\u00e2m nghi\u1ec7p, Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

M\u1ee5c ti\u00eau c\u1ee7a nghi\u00ean c\u1ee9u nh\u1eb1m \u0111\u00e1nh gi\u00e1 \u0111\u01b0\u1ee3c bi\u1ebfn d\u1ecb v\u1ec1 sinh tr\u01b0\u1edfng, n\u0103ng su\u1ea5t, v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng h\u1ea1t c\u1ee7a 21 d\u00f2ng v\u00f4 t\u00ednh M\u1eafc ca (Macadamia) kh\u1ea3o nghi\u1ec7m t\u1ea1i Th\u1ea1ch Th\u00e0nh, Thanh H\u00f3a. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u ghi nh\u1eadn c\u00f3 s\u1ef1 ph\u00e2n h\u00f3a r\u00f5 v\u1ec1 c\u00e1c t\u00ednh tr\u1ea1ng \u0111\u01b0\u1eddng k\u00ednh, chi\u1ec1u cao, \u0111\u01b0\u1eddng k\u00ednh t\u00e1n c\u00e2y c\u1ee7a c\u00e1c d\u00f2ng M\u1eafc ca kh\u1ea3o nghi\u1ec7m \u1edf tu\u1ed5i 6 v\u00e0 tu\u1ed5i 8. C\u00e1c t\u00ednh tr\u1ea1ng v\u1ec1 n\u0103ng su\u1ea5t h\u1ea1t, \u0111\u01b0\u1eddng k\u00ednh qu\u1ea3, \u0111\u01b0\u1eddng k\u00ednh h\u1ea1t, v\u00e0 \u0111\u01b0\u1eddng k\u00ednh nh\u00e2n h\u1ea1t c\u0169ng c\u00f3 s\u1ef1 ph\u00e2n h\u00f3a r\u00f5 r\u1ec7t. Th\u1ee9 t\u1ef1 x\u1ebfp h\u1ea1ng c\u1ee7a c\u00e1c d\u00f2ng v\u1ec1 n\u0103ng su\u1ea5t h\u1ea1t b\u00ecnh qu\u00e2n c\u00f3 s\u1ef1 \u0111\u1ed3ng nh\u1ea5t r\u1ea5t l\u1edbn \u1edf giai \u0111o\u1ea1n tu\u1ed5i 6 v\u00e0 tu\u1ed5i 7, theo \u0111\u00f3 c\u00e1c d\u00f2ng n\u0103ng su\u1ea5t cao \u1edf tu\u1ed5i 6 c\u0169ng \u0111\u1ed3ng th\u1eddi l\u00e0 c\u00e1c d\u00f2ng c\u00f3 n\u0103ng su\u1ea5t cao \u1edf tu\u1ed5i 7. C\u00e1c d\u00f2ng A38, OC v\u00e0 A4 c\u00f3 n\u0103ng su\u1ea5t cao v\u00e0 v\u1eabn duy tr\u00ec trong nh\u00f3m t\u1ed1t \u1edf c\u00e1c \u0111\u1ed9 tu\u1ed5i nghi\u00ean c\u1ee9u. C\u00f3 s\u1ef1 t\u01b0\u01a1ng \u0111\u1ed3ng gi\u1eefa \u0111\u01b0\u1eddng k\u00ednh h\u1ea1t v\u00e0 \u0111\u01b0\u1eddng k\u00ednh nh\u00e2n, c\u00e1c d\u00f2ng c\u00f3 h\u1ea1t to th\u01b0\u1eddng c\u00f3 nh\u00e2n to v\u00e0 ng\u01b0\u1ee3c l\u1ea1i. C\u00e1c d\u00f2ng c\u00f3 nh\u00e2n h\u1ea1t l\u1edbn g\u1ed3m A4, A38, A16, 842, 816 v\u00e0 849 c\u00f3 \u0111\u01b0\u1eddng k\u00ednh nh\u00e2n trung b\u00ecnh t\u1eeb 1,75 \u0111\u1ebfn 1,83 cm. K\u1ebft qu\u1ea3 \u0111\u00e1nh gi\u00e1 c\u0169ng cho th\u1ea5y vi\u1ec7c \u0111\u00e1nh gi\u00e1 n\u0103ng su\u1ea5t h\u1ea1t v\u00e0 \u0111\u01b0\u1eddng k\u00ednh nh\u00e2n h\u1ea1t M\u1eafc ca qua c\u00e1c n\u0103m l\u00e0 r\u1ea5t c\u1ea7n thi\u1ebft \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c ch\u00ednh x\u00e1c ti\u1ec1m n\u0103ng c\u1ee7a gi\u1ed1ng.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Bi\u1ebfn d\u1ecb, sinh tr\u01b0\u1edfng, n\u0103ng su\u1ea5t, ch\u1ea5t l\u01b0\u1ee3ng, M\u1eafc ca<\/td>\n<\/tr>\n

\n

<\/a>Variation in growth, nut yield and quality of Macadamia in clonal trial at Thach Thanh, Thanh Hoa province<\/strong><\/p>\n

The objective of the study was to evaluate the variation in growth, yield, and nut quality of 21 macadamia clones tested in Thach Thanh, Thanh Hoa province. The results of the study showed that there was a significant difference in diameter, height, and canopy diameter of the tested macadamia clones at the age of 6 and 8. Nut yield, fruit diameter, nut diameter, and the kernel diameter, were significantly different between clones. The ranking of clones in average nut yield was stable between age 6 and 7 years old, wherein the high yielding clones at age 6 years were also the high yielding clones at age 7 years. Clones A38, OC and A4 were of high yield at all ages. There was a strong similarity between nut diameter and kernel diameter, the clones with large nuts often had large kernels and vice versa. The clones with large kernels including A4, A38, A16, 842, 816 and 849 with average kernel diameter of 1.75 to 1.83 cm. The evaluation results also showed that it is necessary to evaluate the nut yield and kernel diameter of Macadamia in successive years to accurately determine the potential of the cultivar.<\/p>\n

Keywords:<\/em><\/strong> Variation, growth, yield, quality, Macadamia<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u0110\u00c1NH GI\u00c1 \u0110A D\u1ea0NG DI TRUY\u1ec0N\u00a0QU\u1ea6N TH\u1ec2 B\u1ea6N KH\u00d4NG C\u00c1NH (Sonneratia apetala <\/em>Buch – Ham)\u00a0\u1ede VI\u1ec6T NAM B\u1eb0NG CH\u1ec8 TH\u1eca ISSR<\/p>\n

<\/a>Nguy\u1ec5n Th\u1ecb Vi\u1ec7t H\u00e01<\/sup>, L\u00ea V\u0103n Th\u00e0nh2<\/sup>, Nguy\u1ec5n Th\u1ecb Huy\u1ec1n1<\/sup>,
\nL\u00ea Th\u1ecb Th\u1ee7y1<\/sup>, Tr\u1ea7n Th\u1ecb Thu H\u00e01<\/sup>, Mai Th\u1ecb Ph\u01b0\u01a1ng Th\u00fay1<\/sup>,
\nH\u00e0 Th\u1ecb Huy\u1ec1n Ng\u1ecdc1<\/sup>, T\u1ea1 V\u0103n H\u00e2n2<\/sup>, L\u00ea S\u01a1n1<\/sup><\/p>\n

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

B\u1ea7n kh\u00f4ng c\u00e1nh (Sonneratia apetela <\/em>Buch – Ham) l\u00e0 lo\u00e0i c\u00e2y nh\u1eadp n\u1ed9i \u0111\u01b0\u1ee3c tr\u1ed3ng \u1edf m\u1ed9t s\u1ed1 h\u1ec7 sinh th\u00e1i r\u1eebng ng\u1eadp m\u1eb7n \u1edf Nam \u0110\u1ecbnh v\u00e0 Th\u00e1i B\u00ecnh v\u00e0 \u0111\u00e3 ch\u1ee9ng t\u1ecf kh\u1ea3 n\u0103ng th\u00edch nghi t\u1ed1t v\u1edbi \u0111i\u1ec1u ki\u1ec7n Vi\u1ec7t Nam. C\u00e1c r\u1eebng tr\u1ed3ng B\u1ea7n kh\u00f4ng c\u00e1nh \u1edf c\u00e1c t\u1ec9nh n\u00e0y \u0111ang l\u00e0 ngu\u1ed3n cung c\u1ea5p h\u1ea1t duy nh\u1ea5t cho c\u00e1c ch\u01b0\u01a1ng tr\u00ecnh tr\u1ed3ng r\u1eebng ven bi\u1ec3n. Tuy nhi\u00ean, vi\u1ec7c \u0111\u00e1nh gi\u00e1 \u0111a d\u1ea1ng di truy\u1ec1n c\u0169ng nh\u01b0 quan h\u1ec7 di truy\u1ec1n gi\u1eefa c\u00e1c ngu\u1ed3n v\u1eadt li\u1ec7u gi\u1ed1ng ch\u01b0a \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n. Trong nghi\u00ean c\u1ee9u n\u00e0y, 8 ch\u1ec9 th\u1ecb ISSR \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 t\u00ednh \u0111a d\u1ea1ng c\u0169ng nh\u01b0 m\u1ed1i quan h\u1ec7 di truy\u1ec1n gi\u1eefa c\u00e1c xu\u1ea5t x\u1ee9 (ngu\u1ed3n gi\u1ed1ng) v\u00e0 gi\u1eefa c\u00e1c m\u1eabu trong c\u00f9ng xu\u1ea5t x\u1ee9 B\u1ea7n kh\u00f4ng c\u00e1nh hi\u1ec7n \u0111ang c\u00f3 t\u1ea1i Vi\u1ec7t Nam. K\u1ebft qu\u1ea3 ph\u00e2n t\u00edch 90 m\u1eabu B\u1ea7n kh\u00f4ng c\u00e1nh t\u1eeb 6 xu\u1ea5t x\u1ee9 \u0111\u00e3 thu \u0111\u01b0\u1ee3c t\u1ed5ng s\u1ed1 87 ph\u00e2n \u0111o\u1ea1n ISSR-PCR, trong \u0111\u00f3 c\u00f3 63 ph\u00e2n \u0111o\u1ea1n \u0111a h\u00ecnh (chi\u1ebfm 72,61%). C\u00e1c ch\u1ec9 ti\u00eau \u0111a d\u1ea1ng di truy\u1ec1n c\u1ee7a c\u00e1c xu\u1ea5t x\u1ee9 t\u01b0\u01a1ng \u0111\u1ed1i cao (h = 0,257, I = 0,385). Ph\u00e2n t\u00edch quan h\u1ec7 di truy\u1ec1n gi\u1eefa c\u00e1c xu\u1ea5t x\u1ee9 cho th\u1ea5y c\u00e1c xu\u1ea5t x\u1ee9 c\u00f3 s\u1ef1 t\u01b0\u01a1ng \u0111\u1ed3ng kh\u00e1 cao v\u1ec1 m\u1eb7t di truy\u1ec1n, bi\u1ebfn \u0111\u1ed9ng t\u1eeb 0,892 t\u1edbi 0,966. C\u00e1c xu\u1ea5t x\u1ee9 B\u1ea7n kh\u00f4ng c\u00e1nh \u0111\u01b0\u1ee3c chia l\u00e0m 2 nh\u00e1nh l\u1edbn, nh\u00e1nh 1 ch\u1ec9 c\u00f3 xu\u1ea5t x\u1ee9 nh\u1eadp t\u1eeb Myanmar n\u0103m 2003, trong khi nh\u00e1nh 2 bao g\u1ed3m 5 xu\u1ea5t x\u1ee9 c\u00f2n l\u1ea1i (H\u1ea3i Nam, Qu\u1ea3ng \u0110\u00f4ng, Myanmar n\u0103m 1995, Tanintharyi – Myanmar, Ayeyarwady – Myanmar) \u0111\u01b0\u1ee3c chia l\u00e0m c\u00e1c nh\u00f3m nh\u1ecf c\u00f3 quan h\u1ec7 di truy\u1ec1n g\u1ea7n g\u0169i v\u1edbi nhau. T\u1eeb c\u00e1c k\u1ebft qu\u1ea3 thu \u0111\u01b0\u1ee3c, m\u1ed9t s\u1ed1 \u0111\u1ecbnh h\u01b0\u1edbng cho nghi\u00ean c\u1ee9u ch\u1ecdn gi\u1ed1ng v\u00e0 ph\u00e1t tri\u1ec3n gi\u1ed1ng B\u1ea7n kh\u00f4ng c\u00e1nh trong t\u01b0\u01a1ng lai c\u0169ng \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111\u1ec1 c\u1eadp.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> B\u1ea7n kh\u00f4ng c\u00e1nh, ch\u1ec9 th\u1ecb ph\u00e2n t\u1eed, \u0111a d\u1ea1ng di truy\u1ec1n, ISSR<\/td>\n<\/tr>\n

\n

<\/a>Evaluation of genetic diversity and relationship of introduced Sonneratia apetela <\/em>Buch – Ham provenances in Vietnam using ISSR markers<\/strong><\/p>\n

Sonneratia apetela<\/em> Buch – Ham has been planted in some mangrove ecosystems in Nam Dinh and Thai Binh provinces. Despite of being widely used in afforestation in these areas, there is no baseline of genetic information of this species regarding to genetic diversity. The use of molecular markers to assess genetic diversity among S. apetela<\/em> provenances will, therefore, provide the essential information for breeding and deployment program for this species. In this study, 8 ISSR markers were used to evaluate the genetic diversity and relationship between 6 provenances of S. apetala<\/em>, which were imported and planted in Nam Dinh and Thai Binh. A total of 87 DNA fragments were detected, in which 63 were polymorphic (72.61%). The result showed the high level of genetic diversity of studied samples (h = 0.257). The genetic similarity coefficient among provenances ranged from 0.892 to 0.966. The phylogeny of S. apetela<\/em> were divided into 2 branches, the first one has only provenance from Myanmar in 2003 and the other consisted of 5 remained provenances (Hainan, Guangdong, Myanmar in 1995, Tanintharyi – Myanmar, Ayeyarwady – Myanmar). Some recommendations for breeding and deployment programs were also addressed.<\/p>\n

Keywords:<\/em><\/strong> DNA markers, genetic diversity, ISSR, Sonneratia apetala<\/em> Buch – Ham<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u1ee8NG D\u1ee4NG M\u1ed8T S\u1ed0 M\u00c3 V\u1ea0CH ADN\u00a0TRONG PH\u00c2N T\u00cdCH QUAN H\u1ec6 DI TRUY\u1ec0N\u00a0V\u00c0 \u0110\u1ecaNH DANH M\u1ed8T S\u1ed0 LO\u00c0I GI\u1ed4I T\u1ea0I GIA LAI<\/p>\n

<\/a>Nguy\u1ec5n Th\u1ecb Huy\u1ec1n1<\/sup>, Mai Th\u1ecb Ph\u01b0\u01a1ng Th\u00fay1<\/sup>, Tr\u1ea7n Th\u1ecb Thu H\u00e01<\/sup>,
\nL\u00ea Th\u1ecb Th\u1ee7y1<\/sup>, Nguy\u1ec5n Th\u1ecb Vi\u1ec7t H\u00e01<\/sup>, H\u00e0 Huy\u1ec1n Ng\u1ecdc1<\/sup>, Tr\u1ea7n Cao Nguy\u00ean2<\/sup>,
\nTri\u1ec7u Th\u00e1i H\u01b0ng2<\/sup>, Ninh Vi\u1ec7t Kh\u01b0\u01a1ng2<\/sup>, Tr\u1ea7n Ho\u00e0ng Qu\u00fd2<\/sup>,
\nPh\u1ea1m Ti\u1ebfn B\u1eb1ng3<\/sup>, L\u00ea Vi\u1ec7t D\u0169ng3<\/sup>, Nguy\u1ec5n Tr\u00ed B\u1ea3o3<\/sup>, L\u00ea S\u01a1n1<\/sup><\/p>\n

1 <\/sup>Vi\u1ec7n Nghi\u00ean c\u1ee9u Gi\u1ed1ng v\u00e0 C\u00f4ng ngh\u1ec7 Sinh h\u1ecdc L\u00e2m nghi\u1ec7p – Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n2 <\/sup>Vi\u1ec7n Nghi\u00ean c\u1ee9u L\u00e2m sinh – Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n3<\/sup> Trung t\u00e2m L\u00e2m nghi\u1ec7p Nhi\u1ec7t \u0111\u1edbi – Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Gi\u1ed5i \u0103n h\u1ea1t \u0111ang \u0111\u01b0\u1ee3c coi l\u00e0 c\u00e2y l\u00e2m nghi\u1ec7p \u0111a m\u1ee5c \u0111\u00edch c\u00f3 gi\u00e1 tr\u1ecb kinh t\u1ebf cao. Tuy nhi\u00ean, m\u1ed9t s\u1ed1 lo\u00e0i gi\u1ed5i c\u00f3 gi\u00e1 tr\u1ecb kinh t\u1ebf kh\u00e1c nhau l\u1ea1i ch\u01b0a c\u00f3 s\u1ef1 ph\u00e2n bi\u1ec7t r\u00f5 r\u00e0ng v\u1ec1 h\u1ec7 th\u1ed1ng ph\u00e2n lo\u1ea1i v\u00e0 \u0111\u1ecbnh danh d\u1ef1a tr\u00ean c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m h\u00ecnh th\u00e1i. S\u1eed d\u1ee5ng m\u00e3 v\u1ea1ch ADN \u0111\u01b0\u1ee3c nh\u1eadn \u0111\u1ecbnh l\u00e0 c\u00f4ng c\u1ee5 h\u1eefu \u00edch cho vi\u1ec7c ph\u00e2n t\u00edch quan h\u1ec7 di truy\u1ec1n, gi\u00e1m \u0111\u1ecbnh v\u00e0 x\u00e1c \u0111\u1ecbnh lo\u00e0i. Nghi\u00ean c\u1ee9u n\u00e0y s\u1eed d\u1ee5ng 3 v\u00f9ng gen l\u1ee5c l\u1ea1p matK, rbcL <\/em>v\u00e0 rpoC1<\/em> \u0111\u1ec3 ph\u00e2n t\u00edch quan h\u1ec7 di truy\u1ec1n c\u1ee7a 4 lo\u00e0i gi\u1ed5i thu\u1ed9c chi Gi\u1ed5i (Michelia) hi\u1ec7n \u0111ang \u0111\u01b0\u1ee3c tr\u1ed3ng ph\u1ed5 bi\u1ebfn t\u1ea1i Gia Lai. K\u1ebft qu\u1ea3 ph\u00e2n t\u00edch tr\u00ecnh t\u1ef1 nucleotide c\u1ee7a c\u00e1c m\u1eabu gGi\u1ed5i t\u1ea1i 3 v\u00f9ng gen nghi\u00ean c\u1ee9u c\u00f3 s\u1ef1 t\u01b0\u01a1ng \u0111\u1ed3ng t\u1eeb 97,8% \u0111\u1ebfn 99,8%. M\u1ed1i quan h\u1ec7 di truy\u1ec1n gi\u1eefa c\u00e1c m\u1eabu Gi\u1ed5i nghi\u00ean c\u1ee9u \u0111\u01b0\u1ee3c ph\u00e2n bi\u1ec7t r\u00f5 r\u00e0ng gi\u1eefa m\u1eabu Gi\u1ed5i kh\u00f4ng \u0103n h\u1ea1t v\u1edbi 3 m\u1eabu c\u00f2n l\u1ea1i khi ph\u00e2n t\u00edch ph\u00e1t sinh ch\u1ee7ng lo\u1ea1i b\u1eb1ng gi\u1ea3i tr\u00ecnh t\u1ef1 \u1edf c\u1ea3 3 v\u00f9ng gen. \u0110\u1ed1i v\u1edbi m\u1eabu Gi\u1ed5i \u0103n h\u1ea1t tr\u1ed3ng v\u00e0 Gi\u1ed5i \u0103n h\u1ea1t t\u1ef1 nhi\u00ean kh\u00f4ng c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 m\u1eb7t di truy\u1ec1n v\u00e0 g\u1ea7n g\u0169i nhau tr\u00ean c\u00e2y ph\u00e1t sinh ch\u1ee7ng lo\u1ea1i n\u00ean c\u00f3 th\u1ec3 nh\u1eadn \u0111\u1ecbnh hai m\u1eabu n\u00e0y l\u00e0 c\u00f9ng m\u1ed9t lo\u00e0i. Tr\u00ecnh t\u1ef1 nucleotide \u1edf 3 v\u00f9ng gen n\u00e0y c\u1ee7a b\u1ed1n lo\u00e0i gi\u1ed5i nghi\u00ean c\u1ee9u c\u00f3 s\u1ef1 t\u01b0\u01a1ng \u0111\u1ed3ng cao v\u1edbi tr\u00ecnh t\u1ef1 c\u1ee7a Gi\u1ed5i \u0103n qu\u1ea3 (M. hypolampra<\/em>) v\u00e0 Gi\u1ed5i b\u1eafc (M.<\/em> macclurei<\/em>) \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00f4ng b\u1ed1 tr\u00ean Ng\u00e2n h\u00e0ng gen. Vi\u1ec7c k\u1ebft h\u1ee3p c\u1ea3 3 v\u00f9ng gen matK, rbcL <\/em>v\u00e0 rpoC1<\/em> c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ph\u00e2n t\u00edch ph\u00e1t sinh ch\u1ee7ng lo\u1ea1i v\u00e0 m\u1ed1i quan h\u1ec7 di truy\u1ec1n c\u1ee7a 4 m\u1eabu gi\u1ed5i \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Chi Gi\u1ed5i, m\u00e3 v\u1ea1ch ADN, matK, rbcL,<\/em> rpoC1.<\/em><\/td>\n<\/tr>\n

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<\/a>Using DNA barcodes to evaluate genetic relationship of Michelia species in Gia Lai<\/strong><\/p>\n

The genus Michelia inlcludes some high value- multipurposes species that are using for planting programs widely in Vietnam. Despite the diffences in economical values between species, the taxonomy of this genus is still unclear due to the difficulties in morphological classification. In this study, three chloroplast gene regions matK, rbcL <\/em>and rpoC1<\/em> were used to analyse the genetic relationship of four Michelia species, which are widely planted in Gia Lai.<\/em> The genetic similarity coefficients of four species in three chloroplast gene regions ranged from 97.8% to 99.8%. The phylogenetic analysis in all three gene regions of the studied samples clearly separated the unedible Michelia <\/em>sp.<\/em> from the other samples. There was high genetic similarity between cultivated edible Michelia <\/em>sp.<\/em> and the natural edible Michelia<\/em> sp.,<\/em> therefore, these two samples can be identified as the same species. In comparison with other sequences of other Michelia species in NCBI, studied species had closest genetics relationship with M.<\/em> hypolampra and M. macclurei. <\/em>In summary, combining 3 gene regions matK,<\/em> rbcL<\/em> and rpoC1<\/em> can analyse the phylogenetic ability and genetic relationship of the studied Michelia samples.<\/p>\n

Keywords:<\/em><\/strong> DNA barcode, Michelia, matK, rbcL, rpoC1<\/em><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U T\u00c1I SINH T\u1ef0 NHI\u00caN\u00a0C\u1ee6A \u0110\u01af\u1edaC \u0110\u00d4I (Rhizophora apiculata<\/em> Blum) \u1ede C\u00c1C C\u1ea4P TU\u1ed4I R\u1eeaNG T\u1ea0I T\u1ec8NH B\u1ebeN TRE<\/p>\n

<\/a>Ho\u00e0ng V\u0103n Th\u01a1i, L\u00ea Thanh Quang, Nguy\u1ec5n Kh\u1eafc \u0110i\u1ec7u<\/p>\n

Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Nam B\u1ed9<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Nghi\u00ean c\u1ee9u kh\u1ea3 n\u0103ng t\u00e1i sinh t\u1ef1 nhi\u00ean c\u1ee7a \u0110\u01b0\u1edbc (Rhizophora apiculata)<\/em> \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n t\u1eeb th\u00e1ng 6 \u0111\u1ebfn th\u00e1ng 12 n\u0103m 2020 t\u1ea1i Ban qu\u1ea3n l\u00fd r\u1eebng \u0111\u1eb7c d\u1ee5ng – ph\u00f2ng h\u1ed9 t\u1ec9nh B\u1ebfn Tre. M\u1ee5c ti\u00eau c\u1ee7a nghi\u00ean c\u1ee9u: (i) x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c m\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m sinh tr\u01b0\u1edfng t\u1ea7ng c\u00e2y cao \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u00e1i sinh r\u1eebng, (ii) x\u00e1c \u0111\u1ecbnh s\u1ed1 l\u01b0\u1ee3ng, ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 c\u00e2y c\u00f3 tri\u1ec3n v\u1ecdng v\u00e0 (iii) \u0111\u1ec1 xu\u1ea5t \u0111\u01b0\u1ee3c bi\u1ec7n ph\u00e1p ph\u1ee5c h\u1ed3i r\u1eebng b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p x\u00fac ti\u1ebfn t\u00e1i sinh. Nghi\u00ean c\u1ee9u \u0111\u00e3 ti\u1ebfn h\u00e0nh l\u1eadp 15 \u00f4 ti\u00eau chu\u1ea9n, di\u1ec7n t\u00edch 500 m2<\/sup> \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh m\u1eadt \u0111\u1ed9, \u0111\u01b0\u1eddng k\u00ednh th\u00e2n c\u00e2y, chi\u1ec1u cao, \u0111\u01b0\u1eddng k\u00ednh t\u00e1n t\u1ea7ng c\u00e2y cao, m\u1ed7i \u00f4 ti\u1ebfn h\u00e0nh l\u1eadp 4 \u00f4 \u0111o \u0111\u1ebfm di\u1ec7n t\u00edch 4 m2\u00a0<\/sup>(4 g\u00f3c c\u1ee7a \u00f4 ti\u00eau chu\u1ea9n) \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh th\u00e0nh ph\u1ea7n c\u00e2y t\u00e1i sinh, \u0111o \u0111\u1ebfm c\u00e2y t\u00e1i sinh theo c\u00e1c c\u1ea5p chi\u1ec1u cao (c\u1ea5p 1: < 0,5 m, c\u1ea5p 2: 0,5 – 1,0 m, c\u1ea5p 3; 1,0 – 1,5 m, c\u1ea5p 4: 1,5 – 2,0 m, c\u1ea5p 5; 2 – 3 m, c\u1ea5p 6; 3 – 5,0 m v\u00e0 c\u1ea5p 7 > 5,0 m). K\u1ebft qu\u1ea3 \u0111\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m sinh tr\u01b0\u1edfng c\u1ee7a t\u1ea7ng c\u00e2y cao, \u0111\u01b0\u1eddng k\u00ednh, chi\u1ec1u cao, th\u1ec3 t\u00edch th\u00e2n c\u00e2y v\u00e0 tr\u1eef l\u01b0\u1ee3ng r\u1eebng gia t\u0103ng khi tu\u1ed5i r\u1eebng t\u0103ng l\u00ean; trong khi m\u1eadt \u0111\u1ed9 gi\u1ea3m khi tu\u1ed5i r\u1eebng t\u0103ng. T\u1ef7 l\u1ec7 s\u1ed1 c\u00e2y \u1edf c\u1ea5p chi\u1ec1u cao gi\u1ea3m d\u1ea7n khi chi\u1ec1u cao c\u00e2y t\u00e1i sinh t\u0103ng, c\u00e2y c\u00f3 chi\u1ec1u cao l\u1edbn h\u01a1n 1,0 m chi\u1ebfm 32,5%, t\u01b0\u01a1ng \u1ee9ng s\u1ed1 l\u01b0\u1ee3ng c\u00e2y 11.422 c\u00e2y\/ha c\u00f3 tri\u1ec3n v\u1ecdng \u0111\u1ec3 tham gia v\u00e0o th\u00e0nh ph\u1ea7n c\u1ee7a r\u1eebng. M\u1eadt \u0111\u1ed9 \u0111\u00e3 t\u00e1c \u0111\u1ed9ng r\u00f5 r\u1ec7t \u0111\u1ebfn s\u1ed1 l\u01b0\u1ee3ng c\u00e2y t\u00e1i sinh v\u00e0 c\u00e2y t\u00e1i sinh c\u00f3 tri\u1ec3n v\u1ecdng theo h\u01b0\u1edbng t\u1ef7 l\u1ec7 ngh\u1ecbch v\u1edbi m\u1ee9c \u0111\u1ed9 t\u0103ng m\u1eadt \u0111\u1ed9 v\u00e0 \u0111\u1ed9 t\u00e0n che c\u1ee7a t\u1ea7ng c\u00e2y cao. Tu\u1ed5i r\u1eebng c\u00f3 \u1ea3nh h\u01b0\u1edfng r\u00f5 r\u1ec7t t\u1edbi kh\u1ea3 n\u0103ng t\u00e1i sinh c\u1ee7a \u0110\u01b0\u1edbc, t\u1ef7 l\u1ec7 c\u00e2y tri\u1ec3n v\u1ecdng nhi\u1ec1u nh\u1ea5t \u1edf c\u00e1c c\u1ea5p tu\u1ed5i r\u1eebng V, VIa v\u00e0 VIb.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> C\u00e2y \u0110\u01b0\u1edbc, c\u00e2y tri\u1ec3n v\u1ecdng, t\u00e1i sinh, t\u1ea7ng c\u00e2y cao<\/td>\n<\/tr>\n

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<\/a>Research on the natural regeneration of Rhizophora apiculata<\/em> Blum at different forest ages in Ben Tre province<\/strong><\/p>\n

Research on the natural regeneration ability of mangroves (Rhizophora apiculata<\/em>) was carried out from June to Decmber 2020 at the Management Board of Special – Protection Forests of Ben Tre province. The objectives of the study are (i) to determine some characteristics growth of tall tree layer affecting forest regeneration, (ii) to determine the quantity, quality and potential trees and (iii) to propose restore forests. The project has conducted to establish 15 standard plots with an area of 500 m2<\/sup> to determine the density, diameter, height, canopy diameter of tall trees. Establish 60 standards sample plots with an area of 4 m2<\/sup> (4 corners for each plots) to determine the composition of regenerated trees, measure and count regenerated trees according to height levels (grade 1: < 0.5 m, grade 2: 0.5 – 1.0 m, grade 1. 3; 1.0 – 1.5 m, level 4: 1.5 – 2.0 m, level 5: 2.0 – 3.0 m, level 6: 3.0 – 5.0 m and level 7 > 5.0 m). As a result, have determined that the growth characteristics of tall trees layer as diameter, height, stem volume and forest volume increase as forest age increases; while density decreases as forest age increases. The percentage of trees at the height level decreased gradually as the height of the regenerated trees increased. Potential trees have got 32.5% with (trees with a height greater than 1.0 m) with 11,422 trees\/ha. Density had a marked effect on the number of regenerated and potential regenerated trees in the direction of inversely proportional to the increase in density and canopy cover of the high tree layer. Forest age has a clear influence on the regeneration ability of mangroves, with the highest percentage of promising trees at the age of V, VIa, and VIb.<\/p>\n

Keywords:<\/em><\/strong> Rhizophora, prospect tree, regeneration, high tree layer<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U \u0110\u1eb6C \u0110I\u1ec2M SINH TR\u01af\u1edeNG\u00a0R\u1eeaNG \u0110\u01af\u1edaC (Rhizophora apiculata<\/em> Blume)\u00a0TR\u1ed2NG TR\u00caN C\u00c1C L\u1eacP \u0110\u1ecaA CH\u00cdNH T\u1ea0I B\u1ebeN TRE<\/p>\n

<\/a>Ho\u00e0ng V\u0103n Th\u01a1i1<\/sup>, L\u00ea Thanh Quang1<\/sup>, Nguy\u1ec5n Kh\u1eafc \u0110i\u1ec7u1<\/sup>, Vi\u00ean Ng\u1ecdc Tu\u1ea5n Anh1<\/sup><\/p>\n

1<\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Nam B\u1ed9<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Nghi\u00ean c\u1ee9u \u0111\u1eb7c \u0111i\u1ec3m sinh tr\u01b0\u1edfng c\u1ee7a r\u1eebng \u0110\u01b0\u1edbc (Rhizophora apiculata)<\/em> tr\u1ed3ng \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n t\u1eeb th\u00e1ng 4 \u0111\u1ebfn th\u00e1ng 12 n\u0103m 2020 t\u1ea1i Ban Qu\u1ea3n l\u00fd r\u1eebng \u0111\u1eb7c d\u1ee5ng – ph\u00f2ng h\u1ed9 t\u1ec9nh B\u1ebfn Tre. M\u1ee5c ti\u00eau (i) x\u00e1c \u0111\u1ecbnh c\u00e1c \u0111\u1ea1i l\u01b0\u1ee3ng sinh tr\u01b0\u1edfng c\u00e2y c\u00e1 th\u1ec3 v\u00e0, (ii) x\u00e1c \u0111\u1ecbnh sinh tr\u01b0\u1edfng l\u00e2m ph\u1ea7n r\u1eebng theo tu\u1ed5i v\u00e0 l\u1eadp \u0111\u1ecba tr\u1ed3ng. Nghi\u00ean c\u1ee9u \u0111\u00e3 ti\u1ebfn h\u00e0nh \u0111o \u0111\u01b0\u1eddng k\u00ednh ngang ng\u1ef1c v\u00e0 chi\u1ec1u cao th\u00e2n c\u00e2y t\u1ea1i 15 \u00f4 ti\u00eau chu\u1ea9n (di\u1ec7n t\u00edch 500 m2<\/sup>) \u0111\u00e3 \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp tr\u00ean 3 d\u1ea1ng l\u1eadp \u0111\u1ecba \u1edf c\u00e1c d\u1ea1ng tu\u1ed5i r\u1eebng 15, 20, 25, 30 v\u00e0 35, ti\u1ebfn h\u00e0nh ch\u1eb7t h\u1ea1 45 c\u00e2y b\u00ecnh qu\u00e2n, c\u1eaft th\u00e0nh t\u1eebng ph\u00e2n \u0111o\u1ea1n \u0111\u1ec3 \u0111o \u0111\u1ebfm v\u00f2ng n\u0103m t\u1ea1i v\u1ecb tr\u00ed 1,3 m, 2,0 m, 3,0 m,… t\u00ednh Dbq, Hbq theo tu\u1ed5i v\u00e0 theo l\u1eadp \u0111\u1ecba. K\u1ebft qu\u1ea3 \u0111\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh, chi\u1ec1u cao, th\u1ec3 t\u00edch th\u00e2n c\u00e2y t\u0103ng t\u1ef7 l\u1ec7 thu\u1eadn v\u1edbi tu\u1ed5i r\u1eebng tr\u00ean c\u1ea3 3 d\u1ea1ng l\u1eadp \u0111\u1ecba. Tu\u1ed5i r\u1eebng v\u00e0 d\u1ea1ng l\u1eadp \u0111\u1ecba c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 c\u00e1c \u0111\u1ea1i l\u01b0\u1ee3ng sinh tr\u01b0\u1edfng; \u0111\u01b0\u1eddng k\u00ednh th\u00e2n c\u00e2y chuy\u1ec3n t\u1eeb giai \u0111o\u1ea1n sinh tr\u01b0\u1edfng nhanh sang giai \u0111o\u1ea1n sinh tr\u01b0\u1edfng ch\u1eadm tr\u00ean l\u1eadp \u0111\u1ecba 1 l\u00e0 tu\u1ed5i 6, tr\u00ean l\u1eadp \u0111\u1ecba 2 l\u00e0 tu\u1ed5i 7, l\u1eadp \u0111\u1ecba 3 l\u00e0 tu\u1ed5i 8; chi\u1ec1u cao c\u00e2y tr\u00ean c\u1ea3 3 l\u1eadp \u0111\u1ecba chuy\u1ec3n t\u1eeb giai \u0111o\u1ea1n sinh tr\u01b0\u1edfng nhanh sang giai \u0111o\u1ea1n sinh tr\u01b0\u1edfng ch\u1eadm t\u1ea1i tu\u1ed5i 5; th\u1ec3 t\u00edch th\u00e2n c\u00e2y tr\u00ean l\u1eadp \u0111\u1ecba 1 chuy\u1ec3n t\u1eeb giai \u0111o\u1ea1n sinh tr\u01b0\u1edfng nhanh sang giai \u0111o\u1ea1n sinh tr\u01b0\u1edfng ch\u1eadm t\u1ea1i tu\u1ed5i 25, tr\u00ean l\u1eadp \u0111\u1ecba 2 t\u1ea1i tu\u1ed5i 26 v\u00e0 tr\u00ean l\u1eadp \u0111\u1ecba 3 t\u1ea1i tu\u1ed5i 27. Sinh tr\u01b0\u1edfng l\u00e2m ph\u1ea7n r\u1eebng c\u0169ng thay \u0111\u1ed5i theo t\u1eebng giai \u0111o\u1ea1n tu\u1ed5i v\u00e0 l\u1eadp \u0111\u1ecba tr\u1ed3ng, m\u1eadt \u0111\u1ed9 gi\u1ea3m nhanh \u1edf giai \u0111o\u1ea1n 5 – 10 tu\u1ed5i v\u00e0 giai \u0111o\u1ea1n 10 – 15 tu\u1ed5i; tr\u1eef l\u01b0\u1ee3ng b\u00ecnh qu\u00e2n c\u1ee7a r\u1eebng tr\u1ed3ng tr\u00ean d\u1ea1ng l\u1eadp \u0111\u1ecba 1 l\u00e0 cao nh\u1ea5t t\u1ea1i tu\u1ed5i 27 (171,18 m3<\/sup>\/ha), l\u1eadp \u0111\u1ecba 2 (145,09 m3<\/sup>\/ha) t\u1ea1i tu\u1ed5i 26, th\u1ea5p nh\u1ea5t l\u00e0 r\u1eebng tr\u1ed3ng tr\u00ean l\u1eadp \u0111\u1ecba 3 (133,62 m3<\/sup>\/ha) t\u1ea1i tu\u1ed5i 30.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> C\u00e2y \u0110\u01b0\u1edbc, l\u1eadp \u0111\u1ecba, sinh tr\u01b0\u1edfng, tu\u1ed5i r\u1eebng, v\u00f2ng n\u0103m<\/td>\n<\/tr>\n

\n

<\/a>Research on growth characteristics of Rhizophora apiculata<\/em> Blume at planted sites in Ben Tre province<\/strong><\/p>\n

Research on growth characteristics of Rhizophora apiculata planted forest was carried out from April to December 2020 at the Management Board of special-use forests – protection of Ben Tre province. Objectives (i) determine individual tree growth and, (ii) determine forest stand growth by ages and planting site. The study measured the diameter of tree at breast height (D1,3 m) and tree height in 15 standard plots (with an area of \u200b\u200b500 m2<\/sup>) which were established on 3 site types and forest ages of 15, 20, 25, 30 and 35, cut down 45 average trees, cut down to measure Dcount the year circle at positions of 1.3 m, 2.0 m, 3.0 m, … calculate Dbq, Hbq by age and by site. The results showed that: Tree growth in diameter, height and volume of the trunk increased proportionally with the age of the forest on all three types of sites. Forest ages and site types have differences in growth ones that as, trunk diameter growth changed from fast growth to slow growth on site 1 at the age of 6, on site 2 it was age of 7, site 3 age of 8; tree height on all 3 sites changed from the fast growing stage to the slow growing stage at the age of 5; the volume of trunks on site 1 changed from rapid growth to slow growth at the age of 25, on site 2 at the age of 26 and on site 3 at the age of 27. Forest density varies from age and planting site, density decreases rapidly in the period of 5 – 10 years old and in the period of 10 – 15 years old. The average stand volume of planted forest on site 1 is the highest at the age of 27 (171.18 m3<\/sup>\/ha), site 2 (145.09 m3<\/sup>\/ha) at the age of 26, the lowest is planted on site 3 (133.62 m3<\/sup>\/ha) at the age of 30.<\/p>\n

Keywords:<\/em><\/strong> Mangrove tree, site, growth, forest age, year circle<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>HI\u1ec6N TR\u1ea0NG V\u00c0 \u0110\u1eb6C \u0110I\u1ec2M L\u00c2M H\u1eccC\u00a0C\u1ee6A LO\u00c0I TR\u1eaeC (Dalbergia cochinchinensis <\/em>Pierre ex Laness.)\u00a0T\u1ea0I GIA LAI<\/p>\n

<\/a>Tr\u1ea7n Cao Nguy\u00ean1<\/sup>, Phan V\u0103n M\u00f9i2<\/sup>, Tri\u1ec7u Th\u00e1i H\u01b0ng1<\/sup>, \u0110\u1ed7 Th\u1ecb Thanh H\u00e01<\/sup>,
\nHo\u00e0ng Thanh S\u01a1n1<\/sup>, Ninh Vi\u1ec7t Kh\u01b0\u01a1ng1<\/sup>, Tr\u1ea7n H\u1ea3i Long1<\/sup>, Ph\u00ed H\u1ed3ng H\u1ea3i2<\/sup><\/p>\n

1<\/sup>Vi\u1ec7n Nghi\u00ean c\u1ee9u L\u00e2m sinh
\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

Tr\u1eafc co\u0301 t\u00ean khoa ho\u0323c la\u0300 Dalbergia cochinchinensis <\/em>Pierre ex Laness., thu\u00f4\u0323c h\u1ecd \u0110\u1eadu (Fabaceae) l\u00e0 lo\u00e0i \u0111\u1eb7c h\u1eefu c\u1ee7a khu v\u1ef1c \u0110\u00f4ng D\u01b0\u01a1ng (Vi\u1ec7t Nam, L\u00e0o v\u00e0 Campuchia) v\u00e0 Th\u00e1i Lan. Do b\u1ecb khai th\u00e1c qu\u00e1 m\u1ee9c n\u00ean lo\u00e0i Tr\u1eafc \u0111ang \u1edf m\u1ee9c \u0111e d\u1ecda v\u00e0 \u0111\u01b0\u1ee3c x\u1ebfp v\u00e0o nh\u00f3m danh m\u1ee5c lo\u00e0i S\u1eafp nguy c\u1ea5p (VU) theo \u0111\u00e1nh gi\u00e1 c\u1ee7a T\u1ed5 ch\u1ee9c B\u1ea3o t\u1ed3n thi\u00ean nhi\u00ean Qu\u1ed1c t\u1ebf (IUCN, 2018), m\u1ee9c Nguy c\u1ea5p (EN) trong S\u00e1ch \u0110\u1ecf Vi\u1ec7t Nam (2007) v\u00e0 trong ph\u1ee5 l\u1ee5c IIA c\u1ee7a Ngh\u1ecb \u0111\u1ecbnh 06\/2019\/N\u0110-CP. \u0110\u1ec3 \u0111\u00e1nh gi\u00e1 hi\u1ec7n tr\u1ea1ng v\u00e0 \u0111\u1eb7c \u0111i\u1ec3m l\u00e2m h\u1ecdc c\u1ee7a Tr\u1eafc t\u1ea1i t\u1ec9nh Gia Lai, ph\u01b0\u01a1ng ph\u00e1p \u0111i\u1ec1u tra \u00f4 ti\u00eau chu\u1ea9n k\u1ebft h\u1ee3p v\u1edbi \u0111i\u1ec1u tra theo tuy\u1ebfn \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng. K\u1ebft qu\u1ea3 \u0111i\u1ec1u tra \u0111\u00e3 x\u00e1c \u0111\u1ecbnh, ta\u0323i khu v\u01b0\u0323c nghi\u00ean c\u01b0\u0301u, Tr\u0103\u0301c \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y \u1edf ca\u0301c tra\u0323ng tha\u0301i \u0111\u00e2\u0301t tr\u00f4\u0301ng, n\u01b0\u01a1ng r\u00e2\u0303y, r\u01b0\u0300ng tr\u00f4\u0300ng va\u0300 r\u01b0\u0300ng th\u01b0\u0301 sinh phu\u0323c h\u00f4\u0300i. M\u1eadt \u0111\u1ed9 t\u1ea7ng c\u00e2y cao (D1,3<\/sub> \u2265 6cm) c\u1ee7a l\u00e2m ph\u1ea7n c\u00f3 Tr\u1eafc ph\u00e2n b\u1ed1, dao \u0111\u00f4\u0323ng t\u1eeb 808 – 2.156 c\u00e2y\/ha, tr\u1eef l\u01b0\u1ee3ng l\u00e2m ph\u1ea7n dao \u0111\u00f4\u0323ng t\u1eeb 14,49 – 114,06 m3<\/sup>\/ha. \u0110\u01b0\u1eddng k\u00ednh v\u00e0 chi\u1ec1u cao b\u00ecnh qu\u00e2n c\u1ee7a loa\u0300i Tr\u0103\u0301c cao h\u01a1n \u0111\u01b0\u1eddng k\u00ednh v\u00e0 chi\u1ec1u cao b\u00ecnh qu\u00e2n c\u1ee7a l\u00e2m ph\u1ea7n. H\u1ec7 s\u1ed1 h\u1ed7n lo\u00e0i t\u1eeb 5,14 – 10,17, s\u1ed1 l\u01b0\u1ee3ng c\u00e1c lo\u00e0i c\u00e2y dao \u0111\u1ed9ng t\u1eeb 36 – 78 lo\u00e0i. Ph\u00e2n b\u1ed1 kho\u1ea3ng c\u00e1ch m\u00f4 ph\u1ecfng t\u1ed1t c\u1ea5u tr\u00fac N\/D c\u1ee7a c\u00e1c l\u00e2m ph\u1ea7n \u0111i\u1ec1u tra. M\u1eadt \u0111\u1ed9 t\u1ea7ng c\u00e2y d\u01b0\u1edbi t\u00e1n dao \u0111\u1ed9ng t\u1eeb 1.840 – 7.440 c\u00e2y\/ha, m\u1eadt \u0111\u1ed9 va\u0300 ch\u00e2\u0301t l\u01b0\u01a1\u0323ng t\u1ea7ng c\u00e2y d\u01b0\u1edbi t\u00e1n gi\u1eefa c\u00e1c l\u00e2m ph\u1ea7n c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t r\u00f5 r\u1ec7t theo th\u1eddi gian ph\u1ee5c h\u1ed3i. S\u1ed1 l\u01b0\u1ee3ng c\u00e2y t\u00e1i sinh dao \u0111\u1ed9ng t\u1eeb 27.000 – 43.250 c\u00e2y\/ha v\u00e0 s\u1ed1 lo\u00e0i c\u00e2y t\u00e1i sinh t\u1eeb 20 – 25 lo\u00e0i. T\u1ef7 l\u1ec7 c\u00e2y t\u00e1i sinh t\u1eeb h\u1ea1t nh\u00ecn chung l\u00e0 l\u1edbn h\u01a1n s\u1ed1 c\u00e2y t\u00e1i sinh t\u1eeb ch\u1ed3i. T\u1ef7 l\u1ec7 c\u00e2y t\u00e1i sinh c\u00f3 tri\u1ec3n v\u1ecdng dao \u0111\u1ed9ng trong kho\u1ea3ng 17,59 – 19,38%. Hai lo\u00e0i c\u00e2y b\u1ea1n r\u1ea5t hay g\u1eb7p \u0111i c\u00f9ng lo\u00e0i Tr\u1eafc l\u00e0 Th\u1ea9u t\u1ea5u, \u1ed4 r\u1ec7p, ba lo\u00e0i c\u00e2y b\u1ea1n hay g\u1eb7p l\u00e0 Ch\u1eb9o t\u00eda, D\u1ebb anh v\u00e0 Kh\u00e1o.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Tr\u1eafc (Dalbergia cochinchinensis <\/em>Pierre ex Laness), \u0111\u1eb7c \u0111i\u1ec3m l\u00e2m h\u1ecdc, Gia Lai<\/td>\n<\/tr>\n

\n

<\/a>The present status and silvicultural characteristics of Dalbergia cochinchinensis<\/em> Pierre ex Laness in Gia Lai provinces<\/strong><\/p>\n

Dalbergia cochinchinensis<\/em> Pierre ex Laness., belonging to the Dalbergia<\/em> genus, Fabaceae family, is an endemic timber species of Southeast Asia. Due to over exploitation, D. cochinchinensis<\/em> species is at threat level and is classified as Vulnerable (VU) according to the assessment of the International Union for Conservation of Nature (2018), the level of Endangered (EN) in the Vietnam Red Book (2007) and in Appendix IIA of Decree 06\/2019\/ND-CP. The standard plot survey method combined with the line survey was used to assess the current status and silvicultural characteristics of D. cochinchinensis<\/em> in Gia Lai province. The survey results determined that D. cochinchinensis<\/em> was only encountered in the state of bare land, shifting cultivation, planted forest and restored secondary forest in the study area. The density of trees of the canopy layer ranged from
\n808 – 2,156 trees\/ha, and timber volume ranged from 14.49 – 114.06 m3<\/sup>\/ha. The average diameter at breast heigh and total height of Trac trees are higher than those of the stand. The species richness ranged from 36 – 78 species. The distribution of tree number and diameter (N\/D1.3<\/sub>) conformed to reverse j-shaped (Meyer\u2019s function form). The density of understory layer ranged from 1,804 – 7,440 trees\/ha. The density and quality of the understory layers among forest stands are significantly different with the recovery time. The density of regeneration seedlings of the stands was 27,000 – 43,250 seedlings\/ha and number of species ranges from 20 – 25. The percentage of plants regenerated from seeds is generally greater than the number of plants regenerated from shoots. The average proportion of tall saplings of the stand was 17.59 – 19.38%. Two verry common species with D. cochinchinensis<\/em> are Aporosa dioica, Styrax agrestis<\/em> and three common species are Engelhardtia roxburghiana, Castanopsis pyriformis, D. cochinchinensis and Machilus grandifolia.<\/em><\/p>\n

Keywords:<\/em><\/strong> Dalbergia cochinchinensis <\/em>Pierre ex Laness, silvicultural characteristics, Gia Lai<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U C\u00c1C \u0110\u1eb6C \u0110I\u1ec2M C\u1ea4U TR\u00daC R\u1eeaNG T\u1ef0 NHI\u00caN\u00a0C\u00d3 S\u1ea4U T\u00cdA (Sandoricum indicum<\/em> Cav.) PH\u00c2N B\u1ed0<\/p>\n

<\/a>Nguy\u1ec5n Ki\u00ean C\u01b0\u1eddng1<\/sup>, Ph\u00f9ng V\u0103n T\u1ec9nh1<\/sup>, V\u00f5 \u0110\u1ea1i H\u1ea3i2<\/sup>,
\nNguy\u1ec5n Minh Thanh3<\/sup>, <\/sub>Ph\u1ea1m V\u0103n H\u01b0\u1eddng4<\/sup>, <\/sub>L\u00ea H\u1ed3ng Vi\u1ec7t4<\/sup><\/p>\n

1<\/sup>Trung t\u00e2m Nghi\u00ean c\u1ee9u Th\u1ef1c nghi\u1ec7m L\u00e2m nghi\u1ec7p \u0110\u00f4ng Nam B\u1ed9
\n2<\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n3<\/sup>Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n4<\/sup> Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam – Ph\u00e2n hi\u1ec7u t\u1ea1i \u0110\u1ed3ng Nai<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

S\u1ea5u t\u00eda (Sandoricum indicum<\/em> Cav.) l\u00e0 c\u00e2y g\u1ed7 l\u1edbn, sinh tr\u01b0\u1edfng nhanh, thu\u1ed9c h\u1ecd Xoan (Meliaceae). T\u1ea1i Vi\u1ec7t Nam, c\u00e2y ph\u00e2n b\u1ed1 r\u1ed9ng r\u00e3i \u1edf c\u00e1c t\u1ec9nh ph\u00eda Nam t\u1eeb Kon Tum, Qu\u1ea3ng Nam tr\u1edf v\u00e0o, trong r\u1eebng nhi\u1ec7t \u0111\u1edbi l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh \u1edf \u0111\u1ed9 cao d\u01b0\u1edbi 1.000 m so v\u1edbi m\u1eb7t n\u01b0\u1edbc bi\u1ec3n. Nghi\u00ean c\u1ee9u \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n t\u1ea1i V\u01b0\u1eddn Qu\u1ed1c gia C\u00e1t Ti\u00ean, V\u01b0\u1eddn Qu\u1ed1c gia B\u00f9 Gia M\u1eadp v\u00e0 C\u00f4ng ty TNHH MTV L\u00e2m nghi\u1ec7p \u0110\u1ea1 Huoai v\u1edbi 27 OTC di\u1ec7n t\u00edch 2.000 m2<\/sup> tr\u00ean 3 tr\u1ea1ng th\u00e1i r\u1eebng gi\u00e0u, trung b\u00ecnh v\u00e0 ngh\u00e8o. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y t\u1ed5 th\u00e0nh r\u1eebng t\u1ef1 nhi\u00ean theo ch\u1ec9 s\u1ed1 IV% c\u00f3 s\u1ed1 lo\u00e0i \u01b0u th\u1ebf dao \u0111\u1ed9ng t\u1eeb 6 – 14 lo\u00e0i, trong \u0111\u00f3 S\u1ea5u t\u00eda l\u00e0 lo\u00e0i chi\u1ebfm \u01b0u th\u1ebf sinh th\u00e1i v\u1edbi IV% =12,4 – 23,4; c\u00f3 2 \u01b0u h\u1ee3p th\u1ef1c v\u1eadt ch\u00ednh: (1) S\u1ebfn m\u1ee7 – S\u1ea5u t\u00eda – B\u00ecnh linh (Ch\u1ec9 s\u1ed1 IV% c\u1ee7a \u01b0u h\u1ee3p = 40,4%); (2) S\u1ea5u t\u00eda – G\u1ed9i t\u00eda – S\u1ebfn m\u1ee7 – B\u1eb1ng l\u0103ng (IV: 40,1 – 44,6%). M\u1eadt \u0111\u1ed9 c\u00e2y g\u1ed7 c\u1ee7a c\u00e1c tr\u1ea1ng th\u00e1i r\u1eebng dao \u0111\u1ed9ng t\u1eeb 440 – 792 c\u00e2y\/ha, trong \u0111\u00f3 m\u1eadt \u0111\u1ed9 S\u1ea5u t\u00eda t\u1eeb 70 – 138 c\u00e2y\/ha. \u0110\u1ed9 t\u00e0n che r\u1eebng dao \u0111\u1ed9ng t\u1eeb 0,46 \u0111\u1ebfn 0,67. Ph\u00e2n b\u1ed1 N\/D1,3<\/sub> c\u1ee7a c\u00e2y g\u1ed7 \u0111\u1ec1u tu\u00e2n theo h\u00e0m s\u1ed1 m\u0169, gi\u1ea3m d\u1ea7n, m\u1ed9t \u0111\u1ec9nh l\u1ec7ch tr\u00e1i.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> S\u1ea5u t\u00eda, r\u1eebng t\u1ef1 nhi\u00ean, \u0111\u1eb7c \u0111i\u1ec3m c\u1ea5u tr\u00fac, t\u1ed5 th\u00e0nh r\u1eebng, m\u1eadt \u0111\u1ed9, \u0111\u1ed9 t\u00e0n che<\/td>\n<\/tr>\n

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<\/a>Research the structure characteristics of natural forest with Sandoricum indicum<\/em> Cav. distribution<\/strong><\/p>\n

Sandoricum indicum<\/em> Cav. is a big, fast-growing tree species belonging to the Meliaceae family. In Vietnam, the tree is widely distributed in the southern provinces from Kon Tum, Quang Nam onwards, in evergreen broadleaf tropical forests at altitudes below 1,000 m above sea level. The study was carried out at Cat Tien National Park, Bu Gia Map National Park and Da Huoai Forestry the Limited Liability Company with 27 plots of 2,000 m2<\/sup> in 3 forest statuses: rich, medium and poor. Research results show that natural forest formations according to IV% index have the number of dominant species ranging from 6 – 14 species, of which Sandoricum indicum<\/em> Cav. is the ecologically dominant species with IV% = 12.4 – 23.4; there are 2 main plant compounds: (1) Shorea roxburghii<\/em> G.Don – Sandoricum indicum<\/em> Cav. – Vitex pubescens<\/em> Vahl. (Index IV% of superiority = 40.4%); (2) Sandoricum indicum<\/em> Cav. – Amoora gigantea<\/em> Pierre – Shorea roxburghii<\/em> G.Don – Lagerstroemia speciosa<\/em> (IV: 40.1 – 44.6%). The density of trees in different forest states ranges from 440 – 792 trees\/ha, of which the density of Sandoricum indicum<\/em> Cav. is from 70 – 138 trees\/ha. The forest canopy cover ranges from 0.46 to 0.67. The distribution of N\/D1,3<\/sub> of the trees follows an exponential function, decreasing, with one peak skewed to the left.<\/p>\n

Keywords:<\/em><\/strong> Sandoricum indicum<\/em> Cav., natural forest, structural features, forest nest, density, forest canopy<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U C\u1ea2I T\u1ea0O \u0110\u1ea4T B\u00c3I TH\u1ea2I KHAI TH\u00c1C M\u1ece \u0110\u1ed2NG\u00a0T\u1ec8NH L\u00c0O CAI B\u1eb0NG TR\u1ed2NG C\u00c2Y \u0110\u1eacU D\u1ea6U (Pongamia pinnata) <\/em>K\u1ebeT H\u1ee2P B\u00d3N NHI\u1ec4M N\u1ea4M R\u1ec4 N\u1ed8I C\u1ed8NG SINH
\nAM (Arbuscular mycorrhiza<\/em>) \u1ede V\u01af\u1edcN \u01af\u01a0M<\/p>\n

<\/a>V\u0169 Qu\u00fd \u0110\u00f4ng, H\u00e0 Th\u1ecb Hi\u1ec1n, L\u00ea Th\u1ecb Thu H\u1eb1ng, H\u00e0 Th\u1ecb Mai, Ph\u1ea1m Th\u1ecb Ng\u00e2n<\/p>\n

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<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Gi\u1ea3i ph\u00e1p c\u00f4ng ngh\u1ec7 sinh h\u1ecdc m\u00f4i tr\u01b0\u1eddng (Bioremediation) k\u1ebft h\u1ee3p s\u1eed d\u1ee5ng s\u1ea3n ph\u1ea9m c\u00f4ng ngh\u1ec7 vi sinh (Microbialremediation) v\u1edbi th\u1ef1c v\u1eadt (Phytoremediation) \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng hi\u1ec7u qu\u1ea3 cho c\u1ea3i t\u1ea1o ph\u1ee5c h\u1ed3i c\u00e1c khu v\u1ef1c b\u00e3i th\u1ea3i, khai th\u00e1c m\u1ecf hoang h\u00f3a, \u00f4 nhi\u1ec5m. \u0110\u1ea5t b\u00e3i th\u1ea3i m\u1ecf khai th\u00e1c \u0111\u1ed3ng Sin Quy\u1ec1n v\u00e0 T\u1ea3 Ph\u1eddi (L\u00e0o Cai) \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho nghi\u00ean c\u1ee9u \u1ea3nh h\u01b0\u1edfng c\u1ee7a n\u1ea5m r\u1ec5 n\u1ed9i c\u1ed9ng sinh AM v\u1edbi tr\u1ed3ng c\u00e2y \u0110\u1eadu d\u1ea7u t\u1edbi kh\u1ea3 n\u0103ng c\u1ea3i t\u1ea1o, ph\u1ee5c h\u1ed3i c\u1ee7a \u0111\u1ea5t t\u1ea1i v\u01b0\u1eddn \u01b0\u01a1m Vi\u1ec7n Nghi\u00ean c\u1ee9u Sinh th\u00e1i v\u00e0 M\u00f4i tr\u01b0\u1eddng r\u1eebng. Sau 8 th\u00e1ng th\u00ed nghi\u1ec7m tr\u1ed3ng c\u00e2y \u0110\u1eadu d\u1ea7u k\u1ebft h\u1ee3p b\u00f3n nhi\u1ec5m ch\u1ebf ph\u1ea9m n\u1ea5m r\u1ec5 n\u1ed9i c\u1ed9ng sinh AM in vitro<\/em> trong v\u01b0\u1eddn \u01b0\u01a1m cho th\u1ea5y b\u00f3n nhi\u1ec5m ch\u1ebf ph\u1ea9m AM v\u1edbi l\u01b0\u1ee3ng 5 gram ch\u1ebf ph\u1ea9m AM in vitro<\/em> 100IP\/gram (- 500 \u0111\u01a1n v\u1ecb x\u00e2m nhi\u1ec5m IP\/c\u00e2y) \u0111\u00e3 l\u00e0m t\u0103ng sinh tr\u01b0\u1edfng D00<\/sub> -24% v\u00e0 Hvn<\/sub> t\u1eeb 45 – 58% so v\u1edbi kh\u00f4ng s\u1eed d\u1ee5ng ch\u1ebf ph\u1ea9m AM in vitro <\/em>sau 8 th\u00e1ng th\u00ed nghi\u1ec7m. C\u00e1c ch\u1ec9 ti\u00eau l\u00fd h\u00f3a t\u00ednh c\u1ee7a \u0111\u1ea5t b\u00e3i th\u1ea3i sau 8 th\u00e1ng th\u00ed nghi\u1ec7m v\u1edbi c\u00e2y \u0110\u1eadu d\u1ea7u b\u00f3n nhi\u1ec5m ch\u1ebf ph\u1ea9m AM in vitro<\/em> \u0111\u00e3 \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n so v\u1edbi \u0111\u1ea5t b\u00e3i th\u1ea3i ban \u0111\u1ea7u tr\u01b0\u1edbc th\u00ed nghi\u1ec7m v\u00e0 so v\u1edbi \u0111\u1ed1i ch\u1ee9ng kh\u00f4ng b\u00f3n nhi\u1ec5m ch\u1ebf ph\u1ea9m AM in vitro<\/em>. C\u1ed9ng sinh c\u1ed1 \u0111\u1ecbnh \u0111\u1ea1m Rhizobium khi b\u00f3n nhi\u1ec5m ch\u1ebf ph\u1ea9m AM in vitro <\/em>t\u0103ng l\u00ean \u0111\u00e1ng k\u1ec3 v\u1ec1 s\u1ed1 l\u01b0\u1ee3ng v\u00e0 vi khu\u1ea9n ph\u00e2n gi\u1ea3i l\u00e2n \u0111\u01b0\u1ee3c b\u00f3n nhi\u1ec5m ch\u1ebf ph\u1ea9m AM in vitro<\/em> cao h\u01a1n h\u1eb3n so v\u1edbi kh\u00f4ng b\u00f3n nhi\u1ec5m ch\u1ebf ph\u1ea9m AM in vitro<\/em>.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> N\u1ea5m r\u1ec5 n\u1ed9i c\u1ed9ng sinh, AM, c\u00e2y \u0110\u1eadu d\u1ea7u, b\u00e3i th\u1ea3i khai th\u00e1c \u0111\u1ed3ng, bioremendaiton<\/td>\n<\/tr>\n

\n

<\/a>Research conditioning copper mining waste soil by plant Pongamia pinnata <\/em>combined inoculums Arbuscular mycorrhiza<\/em> in nursery<\/strong><\/p>\n

The bioremediation that combined between microbialremediation and phytoremediation would be potentially and effectively applied for cleaning up contaminated sites, especially the abandoned mining areas with their contaminated tailings to restore the ecosystems. The copper mining waste soil of Sin Quyen and Ta Phoi (Lao Cai) were collected and used for the study on effects of Arbuscular mycorrhiza<\/em> (AM) combined plant Pongamia pinnata<\/em> rehabilitate ability to the contaminated soils at nursery of Research Institute for Forest Ecology and Environment. After 8 months of experiment on planting Pongamia pinnata<\/em> in combination with inoculated AM in vitro<\/em> in the nursery endosymbiotic, it was found that inoculation AM with 5 grams of AM in vitro<\/em> 100IP\/gram (- 500 Infective progagule units) per plant showed that AM in vitro<\/em> increased growth in diameter (D00<\/sub>) -24% and height (Hvn<\/sub>) increased from 45 – 58% compared with not using AM in vitro<\/em> after 8 months of experiment. The physicochemical and physical properties of the substrates with AM inoculated were found to be remarkably improved after 8 months of the experiment as compared to those in control and those before experiment (zero baseline). The Rhizobium symbiotic nitrogen fixation of the treatment inoculated with AM in vitro<\/em> significantly increased in number; Microbes decompose phosphate of the experimental treatment inoculated with AM preparations in vitro<\/em> were significantly higher than those of the experimental treatment that were not inoculated with AM in vitro<\/em>.<\/p>\n

Keywords:<\/em><\/strong> Arbuscular mycorrhiza<\/em>, AM, bioremendaiton, copper mining waste, Pongamia pinnata<\/em><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U \u1ea2NH H\u01af\u1edeNG C\u1ee6A \u0110I\u1ec0U KI\u1ec6N NU\u00d4I C\u1ea4Y \u0110\u1ebeN\u00a0SINH TR\u01af\u1edeNG C\u1ee6A B\u1ed0N CH\u1ee6NG VI KHU\u1ea8N PH\u00c2N GI\u1ea2I XENLULO<\/p>\n

<\/a>V\u0169 V\u0103n \u0110\u1ecbnh, Nguy\u1ec5n Th\u1ecb Loan, Ph\u1ea1m V\u0103n Nh\u1eadt, Tr\u00e2\u0300n Nh\u00e2\u0323t T\u00e2n<\/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

T\u00ednh \u0111\u1ebfn 31\/12\/2020, t\u1ed5ng di\u1ec7n t\u00edch r\u1eebng to\u00e0n qu\u1ed1c l\u00e0 14.677.215 ha, trong \u0111\u00f3 r\u1eebng t\u1ef1 nhi\u00ean l\u00e0 10.279.185 ha, r\u1eebng tr\u1ed3ng l\u00e0 4.398.030 ha. 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. M\u1ed9t trong nh\u1eefng nguy\u00ean nh\u00e2n ch\u00ednh g\u00e2y ch\u00e1y r\u1eebng l\u00e0 do v\u1eadt li\u1ec7u ch\u00e1y d\u01b0\u1edbi t\u00e1n r\u1eebng t\u00edch t\u1ee5 qu\u00e1 nhi\u1ec1u. Gi\u1ea3m v\u1eadt li\u1ec7u ch\u00e1y d\u01b0\u1edbi t\u00e1n r\u1eebng b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng vi khu\u1ea9n c\u00f3 kh\u1ea3 n\u0103ng ph\u00e2n gi\u1ea3i xenlulo gi\u00fap ph\u00e2n gi\u1ea3i nhanh v\u1eadt li\u1ec7u ch\u00e1y g\u00f3p ph\u1ea7n c\u1ea3i thi\u1ec7n \u0111\u1ed9 ph\u00ec nhi\u00eau c\u1ee7a \u0111\u1ea5t v\u00e0 h\u1ea1n ch\u1ebf kh\u1ea3 n\u0103ng ch\u00e1y r\u1eebng \u0111ang \u0111\u01b0\u1ee3c quan t\u00e2m \u1ee9ng d\u1ee5ng v\u00e0 \u0111\u01b0\u1ee3c coi l\u00e0 m\u1ed9t gi\u1ea3i ph\u00e1p hi\u1ec7u qu\u1ea3, \u00edt t\u1ed1n k\u00e9m v\u00e0 th\u00e2n thi\u1ec7n v\u1edbi m\u00f4i tr\u01b0\u1eddng. Nghi\u00ean c\u1ee9u n\u00e0y \u0111\u00e3 l\u1ef1a ch\u1ecdn \u0111\u01b0\u1ee3c \u0111i\u1ec1u ki\u1ec7n nu\u00f4i c\u1ea5y th\u00edch h\u1ee3p cho b\u1ed1n chu\u0309ng vi khu\u00e2\u0309n (Bacillus subtilis (<\/em>SSK, SSK1.2) v\u00e0 ch\u1ee7ng Bacillus megaterium <\/em>(SSK9.1, SSK9.2) c\u00f3 kh\u1ea3 n\u0103ng ph\u00e2n gi\u1ea3i xenlulo nh\u01b0 sau: m\u00f4i tr\u01b0\u1eddng nu\u00f4i c\u1ea5y PD, t\u1ed1c \u0111\u1ed9 l\u1eafc 150 v\u00f2ng\/ph\u00fat, th\u1eddi gian nu\u00f4i c\u1ea5y 72 gi\u1edd \u1edf nhi\u1ec7t \u0111\u1ed9 25\u00b1 2o<\/sup>Cv\u00e0 pH =7; m\u00e2\u0323t \u0111\u00f4\u0323 t\u1ebf b\u00e0o vi khu\u1ea9n \u0111a\u0323t 2,6.108<\/sup> – 8,9. 108<\/sup> cfu\/mL.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Vi khu\u1ea9n ph\u00e2n gi\u1ea3i xenlulo, ph\u00f2ng ch\u00e1y r\u1eebng, m\u00e2\u0323t \u0111\u00f4\u0323 t\u00ea\u0301 ba\u0300o vi khu\u1ea9n, \u0111i\u1ec1u ki\u1ec7n nu\u00f4i c\u1ea5y<\/td>\n<\/tr>\n

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<\/a>Research on affects of submerged culture conditions to growth of four strains of cellulolytic bacteria<\/strong><\/p>\n

As of December 31, 2020, the total forest area of \u200b\u200bthe country is 14,677,215 hectares, of which 10,279,185 hectares are natural forests and 4,398,030 hectares of planted forests. In the period from 2015 to December 2020, there were 1,928 forest fires, covering 8,631 hectares of forest fires. One of the main causes of forest fires is the accumulation of combustible materials under the forest canopy. Reducing combustible materials under the forest canopy by using cellulose-degrading bacteria to quickly decompose combustible materials, contributing to improving soil fertility and limiting the possibility of forest fires is being caried, applied and considered an effective, low-cost and environmentally friendly solution. This paper has selected suitable culture conditions for four strains of bacteria (Bacillus subtilis<\/em> (SSK, SSK1.2) and Bacillus megaterium<\/em> (SSK9.1, SSK9.2) capable of degrading cellulose as follows: PD culture field, shaking speed 150 rpm, culture time 72 hours at \u0111\u1ed9 25\u00b1 2o<\/sup>C and pH = 7; bacterial cell density reached 2.6\u00d7108<\/sup>–<\/sup> 8.9\u00d7108<\/sup> cfu\/mL.<\/p>\n

Keywords:<\/em><\/strong> Cellulolytic bacteria, forest fire prevention, bacterial cell density, submerged culture condition<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U \u1ee8NG D\u1ee4NG CH\u1ebe PH\u1ea8M SINH H\u1eccC PH\u00c2N H\u1ee6Y NHANH V\u1eacT LI\u1ec6U CH\u00c1Y D\u01af\u1edaI T\u00c1N R\u1eeaNG TH\u00d4NG \u1ede S\u00d3C S\u01a0N, H\u00c0 N\u1ed8I\u00a0V\u00c0 HO\u00c0NH B\u1ed2, QU\u1ea2NG NINH<\/p>\n

<\/a>V\u0169 V\u0103n \u0110\u1ecbnh, Nguy\u1ec5n Th\u1ecb Loan, L\u00ea Th\u00e0nh C\u00f4ng, Tr\u1ea7n Nh\u1eadt T\u00e2n v\u00e0 Ph\u1ea1m V\u0103n Nh\u1eadt<\/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

T\u00ednh \u0111\u1ebfn 31\/12\/2020, t\u1ed5ng di\u1ec7n t\u00edch r\u1eebng to\u00e0n qu\u1ed1c l\u00e0 14.677.215 ha, trong \u0111\u00f3 r\u1eebng t\u1ef1 nhi\u00ean l\u00e0 10.279.185 ha, r\u1eebng tr\u1ed3ng l\u00e0 4.398.030 ha. Giai \u0111o\u1ea1n t\u1eeb n\u0103m 2015 \u0111\u1ebfn th\u00e1ng 12\/2020 t\u1ed5ng s\u1ed1 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. S\u1eed d\u1ee5ng ch\u1ebf ph\u1ea9m sinh h\u1ecdc trong c\u00f4ng t\u00e1c ph\u00f2ng ch\u00e1y r\u1eebng \u0111ang \u0111\u01b0\u1ee3c coi l\u00e0 m\u1ed9t gi\u1ea3i ph\u00e1p hi\u1ec7u qu\u1ea3, \u00edt t\u1ed1n k\u00e9m v\u00e0 th\u00e2n thi\u1ec7n v\u1edbi m\u00f4i tr\u01b0\u1eddng nh\u1ea5t. Kh\u1ea3 n\u0103ng ph\u00e2n h\u1ee7y v\u1eadt li\u1ec7u ch\u00e1y d\u01b0\u1edbi t\u00e1n r\u1eebng th\u00f4ng t\u1ea1i S\u00f3c S\u01a1n, H\u00e0 N\u1ed9i v\u00e0 Ho\u00e0nh B\u1ed3, Qu\u1ea3ng Ninh b\u1eb1ng ch\u1ebf ph\u1ea9m sinh h\u1ecdc sau 5 th\u00e1ng \u0111\u1ea1t t\u1eeb 66,76 – 73,65%, \u0111\u1ed9 \u1ea9m v\u1eadt li\u1ec7u ch\u00e1y t\u0103ng t\u1eeb 6,38 – 12,66%. S\u1eed d\u1ee5ng ch\u1ebf ph\u1ea9m v\u1edbi t\u1ef7 l\u1ec7 0,5% so v\u1edbi kh\u1ed1i l\u01b0\u1ee3ng v\u1eadt li\u1ec7u ch\u00e1y v\u00e0 th\u1eddi gian t\u1eeb th\u00e1ng 2 \u0111\u1ebfn th\u00e1ng 5 cho hi\u1ec7u qu\u1ea3 t\u1ed1t nh\u1ea5t.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Ch\u1ebf ph\u1ea9m sinh h\u1ecdc, ph\u00f2ng ch\u00e1y r\u1eebng th\u00f4ng, v\u1eadt li\u1ec7u ch\u00e1y<\/td>\n<\/tr>\n

\n

<\/a>Research on the application of biological products that quickly decompose combustible materials under the pine forests canopy in Soc Son, Ha Noi and Hoang Bo, Quang Ninh<\/strong><\/p>\n

As of December 31, 2020, the total forest area of the country is 14,677,215 hectares, of which natural forests are 10,279,185 hectares, and planted forests are 4,398,030 hectares. In the period from 2015 to December 2020, a total of 1,928 forest fires occurred, the area of forest fires reached 8,631 hectares. Using biological products in forest fire prevention is being considered as an effective, low-cost and most environmentally friendly solution. The ability to decompose combustible materials under the canopy of pine forests in Soc Son, Hanoi and Hoanh Bo, Quang Ninh by biological products after 5 months reached from 66.76 – 73.65%, the moisture content of combustible materials increased from 6.38 – 12.66%. Using inoculants with a rate of 0.5% compared to the volume of combustible material and the period from February to May brings the best effect.<\/p>\n

Keywords:<\/em><\/strong> Biological products, pine forest fire prevention, combustible materials<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U \u1ea2NH H\u01af\u1edeNG C\u1ee6A M\u1ed8T S\u1ed0 Y\u1ebeU T\u1ed0 SINH TH\u00c1I\u00a0\u0110\u1ebeN M\u1ee8C \u0110\u1ed8 B\u1eca S\u00c2U \u0110\u1ee4C N\u00d5N (Hypsipyla robusta<\/em>) G\u00c2Y H\u1ea0I\u00a0TR\u00caN R\u1eeaNG TR\u1ed2NG L\u00c1T HOA<\/p>\n

<\/a>Tr\u1ea7n Th\u1ecb L\u1ec7 Tr\u00e01,2<\/sup>, Ph\u1ea1m Quang Thu1<\/sup>, Nguy\u1ec5n Minh Ch\u00ed1<\/p>\n

1 <\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n2 <\/sup>Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc T\u00e2y Nguy\u00ean<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

L\u00e1t hoa \u0111\u01b0\u1ee3c tr\u1ed3ng ph\u1ed5 bi\u1ebfn \u1edf Vi\u1ec7t Nam nh\u01b0ng th\u01b0\u1eddng b\u1ecb s\u00e2u \u0111\u1ee5c n\u00f5n g\u00e2y h\u1ea1i r\u1ea5t n\u1eb7ng. Nghi\u00ean c\u1ee9u nh\u1eb1m \u0111\u00e1nh gi\u00e1 s\u1ef1 \u1ea3nh h\u01b0\u1edfng c\u1ee7a c\u00e1c y\u1ebfu t\u1ed1 tu\u1ed5i c\u00e2y, \u0111\u1ed9 cao, \u0111\u1ea5t \u0111ai, h\u01b0\u1edbng ph\u01a1i v\u00e0 ph\u01b0\u01a1ng th\u1ee9c tr\u1ed3ng \u0111\u1ebfn m\u1ee9c \u0111\u1ed9 b\u1ecb s\u00e2u \u0111\u1ee5c n\u00f5n c\u1ee7a c\u00e2y L\u00e1t hoa t\u1ea1i v\u00f9ng T\u00e2y B\u1eafc v\u00e0 B\u1eafc Trung B\u1ed9. K\u1ebft qu\u1ea3 cho th\u1ea5y, L\u00e1t hoa giai \u0111o\u1ea1n 1 – 2 tu\u1ed5i m\u1eabn c\u1ea3m nh\u1ea5t \u0111\u1ed1i v\u1edbi s\u00e2u \u0111\u1ee5c n\u00f5n, t\u1ef7 l\u1ec7 h\u1ea1i 46,8 – 68,1% v\u00e0 ch\u1ec9 s\u1ed1 h\u1ea1i 1,08 – 2,18; R\u1eebng tr\u1ed3ng \u1edf \u0111\u1ed9 cao d\u01b0\u1edbi 300 m b\u1ecb s\u00e2u \u0111\u1ee5c n\u00f5n g\u00e2y h\u1ea1i n\u1eb7ng nh\u1ea5t v\u1edbi t\u1ef7 l\u1ec7 h\u1ea1i 45,3 – 65,6% v\u00e0 ch\u1ec9 s\u1ed1 h\u1ea1i 1,04 – 2,03. \u0110\u1ea5t ph\u00e1t tri\u1ec3n tr\u00ean \u0111\u00e1 v\u00f4i, t\u1ea7ng d\u00e0y ph\u00f9 h\u1ee3p nh\u1ea5t cho c\u00e2y L\u00e1t hoa v\u1edbi l\u01b0\u1ee3ng t\u0103ng tr\u01b0\u1edfng cao nh\u1ea5t, chi\u1ec1u cao \u0111\u1ea1t 1,55 m\/n\u0103m v\u00e0 \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c \u0111\u1ea1t 2,12 cm\/n\u0103m, trong khi m\u1ee9c \u0111\u1ed9 s\u00e2u h\u1ea1i th\u1ea5p (P% = 18,6% v\u00e0 DI = 0,28). H\u1ea7u nh\u01b0 kh\u00f4ng c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 s\u00e2u \u0111\u1ee5c n\u00f5n gi\u1eefa c\u00e1c h\u01b0\u1edbng ph\u01a1i. Ph\u01b0\u01a1ng th\u1ee9c tr\u1ed3ng xen c\u00e2y b\u1ea3n \u0111\u1ecba c\u00f3 t\u1ef7 l\u1ec7 h\u1ea1i v\u00e0 ch\u1ec9 s\u1ed1 h\u1ea1i th\u1ea5p nh\u1ea5t, t\u01b0\u01a1ng \u1ee9ng l\u00e0 8,2 – 14,9% v\u00e0 0,19 – 0,48. K\u1ebft qu\u1ea3 n\u00e0y cung c\u1ea5p c\u01a1 s\u1edf khoa h\u1ecdc \u0111\u1ec1 xu\u1ea5t c\u00e1c bi\u1ec7n ph\u00e1p qu\u1ea3n l\u00fd s\u00e2u \u0111\u1ee5c n\u00f5n g\u00f3p ph\u1ea7n n\u00e2ng cao n\u0103ng su\u1ea5t v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng r\u1eebng tr\u1ed3ng L\u00e1t hoa.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> L\u00e1t hoa, b\u1ea3n \u0111\u1ecba, ph\u01b0\u01a1ng th\u1ee9c tr\u1ed3ng, S\u00e2u \u0111\u1ee5c n\u00f5n, tu\u1ed5i c\u00e2y<\/td>\n<\/tr>\n

\n

<\/a>Assessing the impacts of ecological factors on the damage of Hypsipyla robusta<\/em> in Chukrasia tabularis<\/em> plantations<\/strong><\/p>\n

Chukrasia tabularis<\/em> have been wide planted in Vietnam. However,
\nC. tabularis<\/em> plantations are often severely damaged by shoot borers (Hypsipyla robusta<\/em>). This study aims to evaluate the impacts of tree age, altitude, soil, directions of exposure and planting method factors on the damage of shoot borers in C. tabularis<\/em> in the Northwest and North Central regions. C. tabularis<\/em> plantations at 1 – 2 year-old stage and an altitude of below 300 m were most susceptible to shoot borers with a damage incidence and damage index of 46.8 – 68.1%, 1.08 – 2.18 and 45.3 – 65.6%, 1.04 – 2.03, respectively. Soil growing on limestone, thick layer (ferralsols) was the most suitable soil for C. tabularis <\/em>with the highest growth, height and diameter at the base were 1.55 m\/year and 2.12 cm\/year, respectively while low level of damage (P% = 18.6% v\u00e0 DI = 0.28). There were almost no difference between the directions of exposure in terms of the proportion of damage of the shoot borers. C. tabularis<\/em> intercropping with native plants was lowest damage rate and damage index of shoot borers (8.2 – 14.9% and 0.19 – 0.48). The results of this study provide a scientific basis to propose management solutions for H. robusta<\/em> to contribute to the improvement of productivity and quality of C. tabularis<\/em> plantations.<\/p>\n

Keywords:<\/em><\/strong> Chukrasia tabularis, Hypsipyla robusta<\/em>, shoot borers, soil<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>CURRENT STATUS AND MEASUTES TO PROMOTE\u00a0SUSTAINABLE MANAGEMENT OF HOUSEHOLD PLANTATION\u00a0IN QUANG TRI PROVINCE<\/p>\n

\u00a0<\/a>Nguyen Hoang Tiep1<\/sup>, Vo Dai Nguyen2<\/sup>, Nguyen Cong Phuong3<\/sup><\/p>\n

1<\/sup>Forest Economic Research Center;
\n2<\/sup>Silviculture Research Institute
\n3<\/sup>Son Duong Forest Protection Department, Tuyen Quang province<\/p>\n\n\n\n\n
SUMMARY<\/p>\n

Quang Tri is a province with a large area of plantation, in which household’s plantations account for 49% (54,929 ha) of the province’s plantation area. Up to now, in the province, there is a SFM group of households with an area of \u200b\u200b2,853.91 hectares of plantation with FSC certification. The species planted by households are mainly Acacia hybrid and Acacia mangium<\/em>, the technical measures are different between households participating in the SFM group model and non-participating in the model, especially in terms of tree density, thinning activity as well as timber production purposes Households participating in SFM group model do not applied burn post harvested residue for land preparation, plant at a lower density, have a longer business cycle (7 – 10 years) and thin out 2 – 3 times to improve sawlog volume. On the other hand, households that do not participate in SFM group usually apply burn post harvested residue, plant with high density, have a short business cycle (4 – 5 years) and do not apply thinning. There is a strong linkage between households in group to support each other on planting and plantation management according to FSC requirement and there is also a cooperation between households in group and wood processing companies through the Forest Owners Association in consumption of timber from household’s plantation. The plantation of SFM group model has higher economic effect than that of plantation from households not participated in SFM group model. To promote the development of household’s plantation, it is necessary to implement synchronously solutions from awareness raising, capacity building and develop policies to support the operation and maintenance of SFM group, applying advanced techniques to improve productivity of plantation.<\/p>\n

Keywords:<\/em><\/strong> Plantation, households, sustainable forest management, Quang Tri province<\/td>\n<\/tr>\n

\n

<\/a>Th\u1ef1c tr\u1ea1ng v\u00e0 c\u00e1c gi\u1ea3i ph\u00e1p th\u00fac \u0111\u1ea9y qu\u1ea3n l\u00fd r\u1eebng tr\u1ed3ng b\u1ec1n v\u1eefng quy m\u00f4 h\u1ed9 gia \u0111\u00ecnh \u1edf t\u1ec9nh Qu\u1ea3ng Tr\u1ecb<\/strong><\/p>\n

Qu\u1ea3ng Tr\u1ecb l\u00e0 t\u1ec9nh c\u00f3 di\u1ec7n t\u00edch r\u1eebng tr\u1ed3ng l\u1edbn v\u00e0 phong tr\u00e0o tr\u1ed3ng r\u1eebng r\u1ea5t ph\u00e1t tri\u1ec3n, trong \u0111\u00f3 r\u1eebng tr\u1ed3ng HG\u0110 chi\u1ebfm t\u1edbi 49% (54.929 ha) di\u1ec7n t\u00edch r\u1eebng tr\u1ed3ng c\u1ee7a t\u1ec9nh. T\u00ednh \u0111\u1ebfn nay tr\u00ean \u0111\u1ecba b\u00e0n t\u1ec9nh c\u00f3 1 nh\u00f3m HG\u0110 v\u1edbi di\u1ec7n t\u00edch 3.147,06 ha r\u1eebng \u0111\u01b0\u1ee3c c\u1ea5p CCR. Lo\u00e0i c\u00e2y tr\u1ed3ng r\u1eebng c\u1ee7a HG\u0110 ch\u1ee7 y\u1ebfu l\u00e0 Keo lai v\u00e0 Keo tai t\u01b0\u1ee3ng, c\u00e1c bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt tr\u1ed3ng v\u00e0 nu\u00f4i d\u01b0\u1ee1ng r\u1eebng c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa c\u00e1c HG\u0110 tham gia m\u00f4 h\u00ecnh CCR QLRBV theo nh\u00f3m h\u1ed9 v\u00e0 c\u00e1c HG\u0110 kh\u00f4ng tham gia, \u0111\u1eb7c bi\u1ec7t l\u00e0 v\u1ec1 m\u1eadt \u0111\u1ed9 tr\u1ed3ng r\u1eebng v\u00e0 t\u1ec9a th\u01b0a c\u0169ng nh\u01b0 m\u1ee5c \u0111\u00edch kinh doanh. C\u00e1c HG\u0110 tham gia m\u00f4 h\u00ecnh CCR theo nh\u00f3m h\u1ed9 x\u1eed l\u00fd th\u1ef1c b\u00ec kh\u00f4ng \u0111\u1ed1t, tr\u1ed3ng v\u1edbi m\u1eadt \u0111\u1ed9 th\u01b0a h\u01a1n, chu k\u1ef3 kinh doanh d\u00e0i h\u01a1n (7 – 10 n\u0103m) v\u00e0 ti\u1ebfn h\u00e0nh t\u1ec9a th\u01b0a 2 – 3 l\u1ea7n \u0111\u1ec3 l\u1ea5y g\u1ed7 l\u1edbn, trong khi c\u00e1c HG\u0110 kh\u00f4ng tham gia th\u00ec \u0111\u1ed1t th\u1ef1c b\u00ec, tr\u1ed3ng r\u1eebng m\u1eadt \u0111\u1ed9 d\u00e0y, chu k\u1ef3 kinh doanh ng\u1eafn (4 – 5 n\u0103m) v\u00e0 kh\u00f4ng t\u1ec9a th\u01b0a \u0111\u1ec3 l\u1ea5y g\u1ed7 nh\u1ecf. Trong m\u00f4 h\u00ecnh CCR theo nh\u00f3m h\u1ed9 \u0111\u00e3 c\u00f3 s\u1ef1 li\u00ean k\u1ebft kh\u00e1 ch\u1eb7t ch\u1ebd gi\u1eefa c\u00e1c HG\u0110 v\u1edbi nhau \u0111\u1ec3 th\u1ef1c hi\u1ec7n tr\u1ed3ng r\u1eebng theo c\u00e1c ti\u00eau chu\u1ea9n QLRBV c\u1ee7a FSC v\u00e0 li\u00ean k\u1ebft gi\u1eefa nh\u00f3m HG\u0110 tr\u1ed3ng r\u1eebng v\u1edbi c\u00e1c c\u01a1 s\u1edf ch\u1ebf bi\u1ebfn g\u1ed7 th\u00f4ng qua H\u1ed9i\/chi h\u1ed9i ch\u1ee7 r\u1eebng trong vi\u1ec7c ti\u00eau th\u1ee5 s\u1ea3n ph\u1ea9m r\u1eebng tr\u1ed3ng. M\u00f4 h\u00ecnh CCR theo nh\u00f3m HG\u0110 c\u00f3 hi\u1ec7u qu\u1ea3 kinh t\u1ebf r\u1eebng tr\u1ed3ng cao h\u01a1n so v\u1edbi r\u1eebng tr\u1ed3ng c\u1ee7a c\u00e1c HG\u0110 kh\u00f4ng tham gia CCR. \u0110\u1ec3 th\u00fac \u0111\u1ea9y r\u1eebng tr\u1ed3ng HG\u0110 ti\u1ebfp t\u1ee5c ph\u00e1t tri\u1ec3n c\u1ea7n ph\u1ea3i th\u1ef1c hi\u1ec7n \u0111\u1ed3ng b\u1ed9 c\u00e1c gi\u1ea3i ph\u00e1p t\u1eeb n\u00e2ng cao nh\u1eadn th\u1ee9c, n\u0103ng th\u1ef1c th\u1ef1c hi\u1ec7n v\u00e0 QLRBV cho \u0111\u1ebfn c\u00e1c ch\u00ednh s\u00e1ch h\u1ed7 tr\u1ee3 v\u1eadn h\u00e0nh v\u00e0 duy tr\u00ec CCR theo nh\u00f3m HG\u0110, \u1ee9ng d\u1ee5ng KHCN trong tr\u1ed3ng r\u1eebng,…<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> R\u1eebng tr\u1ed3ng, h\u1ed9 gia \u0111\u00ecnh, qu\u1ea3n l\u00fd r\u1eebng b\u1ec1n v\u1eefng, t\u1ec9nh Qu\u1ea3ng Tr\u1ecb.<\/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 5 – 2021 1. Nghi\u00ean c\u1ee9u k\u1ef9 thu\u1eadt nh\u00e2n gi\u1ed1ng c\u00e2y D\u1ebb \u0111\u1ecf (Lithocarpus ducampii A. Camus) t\u1eeb h\u1ea1t Research on seed propagation of Lithocarpus ducampii A. Camus \u0110\u1eb7ng Th\u1ecbnh Tri\u1ec1u V\u00f5 \u0110\u1ea1i H\u1ea3i Nguy\u1ec5n Anh D\u0169ng D\u01b0\u01a1ng Quang Trung \u0110\u00e0o Trung \u0110\u1ee9c Mai Th\u1ecb Linh Tr\u1ea7n Anh […]<\/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\/2232"}],"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=2232"}],"version-history":[{"count":3,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/2232\/revisions"}],"predecessor-version":[{"id":2391,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/2232\/revisions\/2391"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/media?parent=2232"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/categories?post=2232"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/tags?post=2232"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}