{"id":2180,"date":"2020-08-06T15:16:38","date_gmt":"2020-08-06T08:16:38","guid":{"rendered":"http:\/\/vafs.gov.vn\/en\/?p=2180"},"modified":"2023-11-23T12:24:52","modified_gmt":"2023-11-23T05:24:52","slug":"vietnam-journal-of-forest-science-number-3-2020","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/en\/2020\/08\/vietnam-journal-of-forest-science-number-3-2020\/","title":{"rendered":"Vietnam Journal of Forest Science Number 3-2020"},"content":{"rendered":"

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<\/a><\/a><\/a>T\u1ea0P CH\u00cd KHOA H\u1eccC L\u00c2M NGHI\u1ec6P S\u1ed0 3<\/strong> – <\/strong>20<\/strong>20<\/strong><\/p>\n

\u00a0<\/strong><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
1.<\/td>\nK\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u b\u01b0\u1edbc \u0111\u1ea7u v\u1ec1 th\u1ea3m th\u1ef1c v\u1eadt v\u00e0 \u0111a d\u1ea1ng th\u1ef1c v\u1eadt\u00a0 t\u1ea1i Khu b\u1ea3o v\u1ec7 c\u1ea3nh quan Th\u00e1c Gi\u1ec1ng, t\u1ec9nh B\u1eafc K\u1ea1n<\/td>\nPreliminary research results on vegetation status and plant diversity in Thac Gieng landscape protected area, Bac Kan province<\/td>\n\u0110\u1ed7 Ho\u00e0ng Chung
\nNguy\u1ec5n Ch\u00ed Hi\u1ec3u
\nNguy\u1ec5n M\u1ea1nh H\u00e0<\/td>\n		3<\/td>\n<\/tr>\n
2.<\/td>\nNghi\u00ean c\u1ee9u tri th\u1ee9c b\u1ea3n \u0111\u1ecba s\u1eed d\u1ee5ng c\u00e2y thu\u1ed1c c\u1ee7a c\u1ed9ng \u0111\u1ed3ng d\u00e2n t\u1ed9c thi\u1ec3u s\u1ed1 t\u1ea1i x\u00e3 Tr\u1ecdng Con, huy\u1ec7n Th\u1ea1ch An, t\u1ec9nh Cao B\u1eb1ng<\/td>\nResearch on indigenous knowledge using medicinal plants of ethnic minority communities in Trong Con commune, Thach An district, Cao Bang province<\/td>\nNguy\u1ec5n Th\u1ecb Thu Hi\u1ec1n
\nNguy\u1ec5n Ti\u1ebfn H\u01b0ng<\/td>\n		11<\/td>\n<\/tr>\n
3.<\/td>\nNghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng in vitro<\/em> lo\u00e0i G\u1eebng \u0111en (Distichochlamys citrea<\/em>) b\u1ea3n \u0111\u1ecba<\/td>\nStudy on breeding of black ginger (Distichochlamys citrea<\/em>) by in vitro <\/em>method<\/td>\nPh\u1ea1m Th\u1ecb Kim H\u1ea1nh
\nTr\u1ecbnh Th\u00f9y D\u01b0\u01a1ng
\nV\u0169 Ph\u01b0\u01a1ng Linh
\nL\u00e3 Tu\u1ea5n Ngh\u0129a<\/td>\n		22<\/td>\n<\/tr>\n
4.<\/td>\nM\u1ee9c \u0111\u1ed9 bi\u1ebfn d\u1ecb v\u1ec1 sinh tr\u01b0\u1edfng v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng th\u00e2n c\u00e2y gi\u1eefa c\u00e1c xu\u1ea5t x\u1ee9 v\u00e0 gia \u0111\u00ecnh M\u1ee1\u00a0 trong c\u00e1c kh\u1ea3o nghi\u1ec7m h\u1eadu th\u1ebf<\/td>\nVariation on growth and stem straightness between provenances and families of Manglietia conifera <\/em>Dandy in the provenance-progeny tests<\/td>\nPh\u00ed H\u1ed3ng H\u1ea3i
\nLa \u00c1nh D\u01b0\u01a1ng
\nv\u00e0 B\u00f9i Th\u1ebf \u0110\u1ed3i<\/td>\n		33<\/td>\n<\/tr>\n
5.<\/td>\nNghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng c\u00e2y T\u00f9ng \u0111en (Diospyros vaccinioides <\/em>Lindl.) t\u1ea1i Qu\u1ea3ng Ninh<\/td>\nStudy on propagating of Diospyros vaccinioides<\/em> in Quang Ninh province<\/td>\nPhan Thanh Ngh\u1ecb
\nNguy\u1ec5n V\u0103n H\u00f9ng
\nTr\u1ecbnh Th\u1ecb Thon
\nPh\u1ea1m Thu H\u00e0<\/td>\n		44<\/td>\n<\/tr>\n
6.<\/td>\nNghi\u00ean c\u1ee9u \u0111\u1eb7c \u0111i\u1ec3m c\u1ea5u tr\u00fac v\u00e0 t\u00e1i sinh t\u1ef1 nhi\u00ean r\u1eebng t\u1ef1 nhi\u00ean tr\u00ean \u0111\u1ea5t c\u00e1t (r\u00fa c\u00e1t)\u00a0 t\u1ea1i huy\u1ec7n Tri\u1ec7u Phong, t\u1ec9nh Qu\u1ea3ng Tr\u1ecb<\/td>\nResearch on forest structure characteristics and natural rengeneration of natural forests on sandy soil (Sandy Forest) in Trieu Phong district, Quang Tri province<\/td>\nHo\u00e0ng Huy Tu\u1ea5n
\nNguy\u1ec5n Duy Phong
\nTr\u1ea7n Th\u1ecb Th\u00fay H\u1eb1ng
\nPh\u1ea1m C\u01b0\u1eddng
\nNg\u00f4 Th\u1ecb Ph\u01b0\u01a1ng Anh<\/td>\n		52<\/td>\n<\/tr>\n
7.<\/td>\n\u1ea2nh h\u01b0\u1edfng c\u1ee7a m\u1eadt \u0111\u1ed9 tr\u1ed3ng, c\u01b0\u1eddng \u0111\u1ed9 t\u1ec9a th\u01b0a \u0111\u1ebfn tu\u1ed5i khai th\u00e1c nh\u1eb1m cung c\u1ea5p g\u1ed7 l\u1edbn \u0111\u1ed1i v\u1edbi r\u1eebng Tr\u00e0m l\u00e1 d\u00e0i t\u1ea1i huy\u1ec7n Th\u1ea1nh H\u00f3a, t\u1ec9nh Long An<\/td>\nEfficiency of planting stock and thinning to havesting time of M. leucadendra <\/em>plantation for sawlog in Thanh Hoa district, Long An province<\/td>\nNg\u00f4 V\u0103n Ng\u1ecdc
\nV\u00f5 Trung Ki\u00ean
\nL\u00ea Thanh Quang
\nNguy\u1ec5n Tr\u1ecdng Nam
\nNguy\u1ec5n Trung Th\u00f4ng<\/td>\n		63<\/td>\n<\/tr>\n
8.<\/td>\nT\u0103ng tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh v\u00e0 t\u1ef7 l\u1ec7 ch\u1ebft c\u1ee7a c\u00e2y c\u00e1 th\u1ec3 \u1edf r\u1eebng t\u1ef1 nhi\u00ean trung b\u00ecnh v\u00e0 gi\u00e0u\u00a0 t\u1ea1i Khu b\u1ea3o t\u1ed3n thi\u00ean nhi\u00ean v\u0103n h\u00f3a \u0110\u1ed3ng Nai<\/td>\nIndividual tree diameter increment and mortality models for medium and rich forest in Dong Nai Culture and Nature Reserve<\/td>\nNguy\u1ec5n Thanh Tu\u1ea5n
\nTr\u1ea7n Thanh C\u01b0\u1eddng
\nTr\u1ea7n Quang B\u1ea3o<\/td>\n		73<\/td>\n<\/tr>\n
9.<\/td>\n\u0110\u00e1nh gi\u00e1 tr\u1eef l\u01b0\u1ee3ng v\u00e0 kh\u1ea3 n\u0103ng h\u1ea5p th\u1ee5 carbon c\u1ee7a r\u1eebng ng\u1eadp m\u1eb7n t\u1ea1i huy\u1ec7n Ngh\u0129a H\u01b0ng, t\u1ec9nh Nam \u0110\u1ecbnh<\/td>\nAssessment of biomass carbon stock and sequestration of mangrove forests in Nghia Hung district, Nam Dinh province<\/td>\nV\u0169 T\u1ea5n Ph\u01b0\u01a1ng
\nPh\u1ea1m Ng\u1ecdc Th\u00e0nh<\/td>\n		87<\/td>\n<\/tr>\n
10.<\/td>\n\u0110\u1eb7c \u0111i\u1ec3m sinh h\u1ecdc v\u00e0 di\u1ec5n bi\u1ebfn m\u1eadt \u0111\u1ed9 qu\u1ea7n th\u1ec3 c\u1ee7a lo\u00e0i Ch\u00e2u ch\u1ea5u m\u00eda ch\u00e0y xanh\u00a0 (Hieroglyphus tonkinensis <\/em>Bolivar) h\u1ea1i Lu\u1ed3ng (Dendrocalamus barbatus<\/em>) t\u1ea1i Ph\u00fa Th\u1ecd<\/td>\nBiological characteristics and population density dynamics of locust Hieroglyphus tonkinensis<\/em> Bolivar damaging bamboo Dendrocalamus barbatus<\/em>
\nin Phu Tho province<\/td>\n		B\u00f9i Quang Ti\u1ebfp
\nTr\u1ea7n Thanh Tr\u0103ng
\nL\u00ea H\u1ed3ng Thi\u1ebft
\nNguy\u1ec5n \u0110\u1ee9c Vinh
\nNguy\u1ec5n Ti\u1ebfn Hi\u1ebfu
\nHo\u00e0ng V\u0103n S\u00e1ng<\/td>\n		97<\/td>\n<\/tr>\n
11.<\/td>\n\u1ea2nh h\u01b0\u1edfng c\u1ee7a \u0111i\u1ec1u ki\u1ec7n \u00e1nh s\u00e1ng \u0111\u1ebfn sinh tr\u01b0\u1edfng\u00a0 c\u1ee7a c\u00e2y L\u00e1t hoa v\u00e0 m\u1ee9c \u0111\u1ed9 b\u1ecb h\u1ea1i do S\u00e2u \u0111\u1ee5c ng\u1ecdn<\/td>\nAssessing the impacts of sunlight on plant growth and potential damage level by the shoot borers of Chukrasia tabularis<\/em><\/td>\nNguy\u1ec5n Minh Ch\u00ed
\n\u0110\u1ed7 Vi\u1ec7t H\u1ed3ng
\nPh\u1ea1m Thu H\u00e0
\nNguy\u1ec5n V\u0103n Th\u00e1i<\/td>\n		106<\/td>\n<\/tr>\n
12.<\/td>\nNghi\u00ean c\u1ee9u c\u00f4ng ngh\u1ec7 ch\u1ebf bi\u1ebfn g\u1ed7 x\u1ebb v\u00e0 v\u00e1n l\u1ea1ng t\u1eeb g\u1ed7 D\u1ebb \u0111\u1ecf (Lithocarpus ducampii <\/em>A. Camus)<\/td>\nStudy on wood processing technology for Lithocarpus ducampii<\/em>\u00a0 A. Camus<\/td>\nB\u00f9i Duy Ng\u1ecdc
\nNguy\u1ec5n Th\u1ecb Ph\u01b0\u1ee3ng
\nNguy\u1ec5n \u0110\u1ee9c Th\u00e0nh
\nT\u1ea1 Th\u1ecb Thanh H\u01b0\u01a1ng
\n\u0110\u00e0o H\u00f9ng M\u1ea1nh
\nV\u00f5 \u0110\u1ea1i H\u1ea3i
\nNguy\u1ec5n B\u1ea3o Ng\u1ecdc<\/td>\n		114<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>K\u1ebeT QU\u1ea2 NGHI\u00caN C\u1ee8U B\u01af\u1edaC \u0110\u1ea6U V\u1ec0 TH\u1ea2M TH\u1ef0C V\u1eacT V\u00c0 \u0110A D\u1ea0NG TH\u1ef0C V\u1eacT T\u1ea0I KHU B\u1ea2O V\u1ec6 C\u1ea2NH QUAN TH\u00c1C GI\u1ec0NG, T\u1ec8NH B\u1eaeC K\u1ea0N<\/p>\n

\u0110\u1ed7 Ho\u00e0ng Chung1*<\/sup>, <\/sub>Nguy\u1ec5n Ch\u00ed Hi\u1ec3u1<\/sup>, Nguy\u1ec5n M\u1ea1nh H\u00e02<\/sup><\/p>\n

Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc N\u00f4ng L\u00e2m Th\u00e1i Nguy\u00ean<\/em><\/p>\n

2<\/em>S\u1edf T\u00e0i nguy\u00ean & M\u00f4i tr\u01b0\u1eddng t\u1ec9nh B\u1eafc K\u1ea1n<\/em><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

M\u1ee5c \u0111\u00edch c\u1ee7a nghi\u00ean c\u1ee9u nh\u1eb1m cung c\u1ea5p d\u1eabn li\u1ec7u khoa h\u1ecdc v\u1ec1: Hi\u1ec7n tr\u1ea1ng th\u1ea3m th\u1ef1c v\u1eadt; \u0110a d\u1ea1ng c\u00e1c taxon th\u1ef1c v\u1eadt; \u0110a d\u1ea1ng nh\u00f3m th\u1ef1c v\u1eadt qu\u00fd hi\u1ebfm. Tr\u00ean c\u01a1 s\u1edf \u0111i\u1ec1u tra theo tuy\u1ebfn v\u00e0 \u0111i\u1ec1u tra \u00f4 ti\u00eau chu\u1ea9n, k\u1ebft qu\u1ea3 cho th\u1ea5y, t\u1ea1i Khu b\u1ea3o v\u1ec7 c\u1ea3nh quan Th\u00e1c Gi\u1ec1ng c\u00f3 8 tr\u1ea1ng th\u00e1i th\u1ea3m th\u1ef1c v\u1eadt, bao g\u1ed3m: R\u1eebng t\u1ef1 nhi\u00ean trung b\u00ecnh c\u00e2y l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh tr\u00ean n\u00fai \u0111\u00e1 v\u00f4i; R\u1eebng t\u1ef1 nhi\u00ean ph\u1ee5c h\u1ed3i c\u00e2y l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh tr\u00ean n\u00fai \u0111\u00e1 v\u00f4i; R\u1eebng t\u1ef1 nhi\u00ean trung b\u00ecnh c\u00e2y l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh tr\u00ean n\u00fai \u0111\u1ea5t; R\u1eebng t\u1ef1 nhi\u00ean ngh\u00e8o c\u00e2y l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh tr\u00ean n\u00fai \u0111\u1ea5t; R\u1eebng ph\u1ee5c h\u1ed3i t\u1ef1 nhi\u00ean c\u00e2y l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh tr\u00ean n\u00fai \u0111\u1ea5t; R\u1eebng h\u1ed7n giao c\u00e2y g\u1ed7 v\u00e0 tre n\u1ee9a; R\u1eebng tre n\u1ee9a; Th\u1ea3m th\u1ef1c v\u1eadt nh\u00e2n t\u00e1c. Khu h\u1ec7 th\u1ef1c v\u1eadt \u0111\u00e3 ghi nh\u1eadn 875 lo\u00e0i th\u1ef1c v\u1eadt b\u1eadc cao c\u00f3 m\u1ea1ch, thu\u1ed9c 493 chi c\u1ee7a 164 h\u1ecd trong 6 ng\u00e0nh th\u1ef1c v\u1eadt. Tr\u00ean khu v\u1ef1c nghi\u00ean c\u1ee9u c\u00f3 t\u00ednh \u0111a d\u1ea1ng v\u1ec1 s\u1ed1 lo\u00e0i, chi th\u1ef1c v\u1eadt trong \u0111\u00f3 c\u00f3 14 lo\u00e0i th\u1ef1c v\u1eadt \u0111\u00ad\u01b0\u1ee3c \u0111\u1ec1 c\u1eadp trong S\u00e1ch \u0110\u1ecf Vi\u1ec7t Nam, Danh l\u1ee5c \u0110\u1ecf IUCN. Trong s\u1ed1 \u0111\u00f3 c\u00f3 7 lo\u00e0i thu\u1ed9c c\u1ea5p EN, 7 lo\u00e0i thu\u1ed9c c\u1ea5p VU (13 lo\u00e0i thu\u1ed9c S\u00e1ch \u0110\u1ecf Vi\u1ec7t Nam (2007) v\u00e0 01 lo\u00e0i thu\u1ed9c Danh l\u1ee5c \u0110\u1ecf IUCN). Theo danh s\u00e1ch trong Ngh\u1ecb \u0111\u1ecbnh 06, Ngh\u1ecb \u0111\u1ecbnh 160 v\u00e0 Ngh\u1ecb \u0111\u1ecbnh 64 c\u00f3: 01 lo\u00e0i thu\u1ed9c nh\u00f3m IA v\u00e0 7 lo\u00e0i thu\u1ed9c nh\u00f3m IIA.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> B\u1eafc K\u1ea1n, \u0111a d\u1ea1ng sinh h\u1ecdc, th\u1ea3m th\u1ef1c v\u1eadt, Th\u00e1c Gi\u1ec1ng<\/td>\n<\/tr>\n

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Preliminary research results on vegetation status and plant diversity in Thac Gieng landscape protected area, Bac Kan province<\/strong><\/p>\n

The purpose of the study is to provide scientific data on: Current status of vegetation; Diversity of plant taxons; Diversity of rare plant groups. Based on the survey along the route and the standard plot survey, the results show that, at Gieng Waterfall landscape protected area, there are 8 vegetation cover states, including: Medium natural evergreen broadleaf forest in the mountains limestone; Natural forest restores evergreen broadleaf trees on limestone mountains; The medium natural forest is evergreen broadleaf trees on land mountains; Poor natural evergreen broadleaf forest on land mountains; The forest naturally regenerates evergreen broadleaf trees in the mountains; Mixed forest of timber and bamboo; Bamboo forest; human vegetation. The flora has recorded 875 species of vascular plants, belonging to 493 genera of 164 families in 6 plant branches. In the study area, there are diverse species and genera including 14 plant species mentioned in the Vietnam Red Data Book, IUCN Red List. Among them are 7 species belonging to EN level, 7 species belonging to VU level (13 species of Vietnam Red Book (2007) and 01 species of IUCN red list). According to the list in Decree 06, Decree 160 and Decree 64: 1 species belongs to group IA and 7 species belong to group IIA.<\/p>\n

Keywords:<\/em><\/strong> Bac Kan, biodiversity, vegetation, Thac Gieng<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U TRI TH\u1ee8C B\u1ea2N \u0110\u1ecaA S\u1eec D\u1ee4NG C\u00c2Y THU\u1ed0C C\u1ee6A C\u1ed8NG \u0110\u1ed2NG D\u00c2N T\u1ed8C THI\u1ec2U S\u1ed0 T\u1ea0I X\u00c3 TR\u1eccNG CON, HUY\u1ec6N TH\u1ea0CH AN, T\u1ec8NH CAO B\u1eb0NG<\/p>\n

<\/a>Nguy\u1ec5n Th\u1ecb Thu Hi\u1ec1n1*<\/sup>, Nguy\u1ec5n Ti\u1ebfn H\u01b0ng2<\/sup><\/p>\n

1<\/sup>Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc N\u00f4ng L\u00e2m Th\u00e1i Nguy\u00ean
\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

Nghi\u00ean c\u1ee9u nh\u1eb1m \u0111\u00e1nh gi\u00e1 kinh nghi\u1ec7m s\u1eed d\u1ee5ng ngu\u1ed3n t\u00e0i nguy\u00ean c\u00e2y thu\u1ed1c c\u1ee7a c\u1ed9ng \u0111\u1ed3ng c\u00e1c d\u00e2n t\u1ed9c thi\u1ec3u s\u1ed1 t\u1ea1i x\u00e3 Tr\u1ecdng Con, huy\u1ec7n Th\u1ea1ch An, t\u1ec9nh Cao B\u1eb1ng. C\u00e1c ph\u01b0\u01a1ng ph\u00e1p s\u1eed d\u1ee5ng g\u1ed3m c\u00f3: \u0110i\u1ec1u tra c\u1ed9ng \u0111\u1ed3ng, thu th\u1eadp m\u1eabu v\u1eadt, \u0111\u1ecbnh danh t\u00ean lo\u00e0i, \u0111\u00e1nh gi\u00e1 t\u00ednh \u0111a d\u1ea1ng ngu\u1ed3n t\u00e0i nguy\u00ean c\u00e2y thu\u1ed1c. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u b\u01b0\u1edbc \u0111\u1ea7u \u0111\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c 94 lo\u00e0i c\u00e2y thu\u1ed1c thu\u1ed9c 79 chi, 59 h\u1ecd \u0111\u01b0\u1ee3c d\u00e2n t\u1ed9c T\u00e0y, N\u00f9ng, Dao s\u1eed d\u1ee5ng trong ch\u1eefa tr\u1ecb b\u1ec7nh. \u0110\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c 9 b\u1ed9 ph\u1eadn kh\u00e1c nhau c\u1ee7a c\u00e2y thu\u1ed1c \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng theo kinh nghi\u1ec7m c\u1ee7a c\u00e1c c\u1ed9ng \u0111\u1ed3ng d\u00e2n t\u1ed9c thi\u1ec3u s\u1ed1, trong \u0111\u00f3 c\u00e1c b\u1ed9 ph\u1eadn \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nhi\u1ec1u nh\u1ea5t l\u00e0: l\u00e1, c\u1ee7, r\u1ec5, c\u1ea3 c\u00e2y v\u00e0 th\u00e2n. \u0110\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c 19 nh\u00f3m b\u1ec7nh \u0111\u01b0\u1ee3c ch\u1eefa tr\u1ecb b\u1eb1ng kinh nghi\u1ec7m s\u1eed d\u1ee5ng c\u00e2y thu\u1ed1c c\u1ee7a c\u1ed9ng \u0111\u1ed3ng c\u00e1c d\u00e2n t\u1ed9c thi\u1ec3u s\u1ed1, trong \u0111\u00f3 c\u00e1c nh\u00f3m b\u1ec7nh chi\u1ebfm t\u1ef7 l\u1ec7 cao nh\u1ea5t l\u00e0: b\u1ec7nh v\u1ec1 ti\u00eau h\u00f3a; v\u1ec1 \u0111\u01b0\u1eddng ti\u1ebft ni\u1ec7u; v\u1ec1 x\u01b0\u01a1ng kh\u1edbp, h\u1ec7 v\u1eadn \u0111\u1ed9ng; v\u1ec1 gan; ngo\u00e0i da v\u00e0 b\u1ec7nh do th\u1eddi ti\u1ebft. X\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c 5 lo\u00e0i c\u00e2y thu\u1ed1c \u0111\u01b0\u1ee3c c\u1ed9ng \u0111\u1ed3ng d\u00e2n t\u1ed9c T\u00e0y, N\u00f9ng, Dao t\u1ea1i khu v\u1ef1c nghi\u00ean c\u1ee9u c\u00f9ng s\u1eed d\u1ee5ng trong ch\u1eefa tr\u1ecb b\u1ec7nh, bao g\u1ed3m: B\u1ea3y l\u00e1 m\u1ed9t hoa – Paris chinensis <\/em>Franch, B\u1ea7u \u0111\u1ea5t – Gynura cusimbua<\/em> (D. Don) S. Moore, B\u00f2 khai – Erythropalum scandens<\/em> Blume, C\u1ee7 b\u00ecnh v\u00f4i – Stephania pierrei<\/em> Diels, Kim ti\u1ec1n th\u1ea3o – Antenoron filiforme<\/em> (Thunb.) Robert. & Vau.<\/p>\n

T\u1eeb kh\u00f3a: <\/em><\/strong>C\u00e2y thu\u1ed1c, Tri th\u1ee9c b\u1ea3n \u0111\u1ecba, Tr\u1ecdng Con, Th\u1ea1ch An, Cao B\u1eb1ng<\/td>\n<\/tr>\n

\n

<\/a>Research on indigenous knowledge using medicinal plants of ethnic minority communities in Trong Con commune, Thach An district, Cao Bang province<\/strong><\/p>\n

This study was conducted to assess the experience of medicinal plant resources of ethnic minority communities in Trong Con Commune, Thach An District, Cao Bang Province. The methods used for collecting data were method of specimen collection, interview method, identification of the species name, method of medicinal plant resources diversity assessment, method of endangered medicinal plants level assessment.The results of research have identified 94 medicinal plant species belonging to 79 genera and 59 families used by the Tay, Nung and Dao ethnic communities to treat diseases. The results have been identified with 9 different parts of medicinal plants used by the experience of the ethnic minority communities, in which the most used parts are: leaves, bulbs, roots, whole plant and stems. The result has been determined that 19 groups of diseases are treated with the experience of using medicinal plants of the ethnic minority communities, in which the disease groups occupy the highest rate: digestive diseases, urinary tract disease, diseases of joints and motor system, liver disease, skin diseases and weather sickness.There are five medicinal plants that are used by ethnic minority communities at the study area for treating disease, includes: Paris chinensis <\/em>Franch, Gynura cusimbua<\/em> (D. Don) S. Moore, Erythropalum scandens<\/em> Blume, Stephania pierrei<\/em> Diels, Antenoron filiforme<\/em> (Thunb.) Robert. & Vau.<\/p>\n

Keywords: <\/em><\/strong>Medicinal plants, indigenous knowledge, Trong Con, Thach An, Cao Bang<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U NH\u00c2N GI\u1ed0NG IN VITRO<\/em> LO\u00c0I G\u1eeaNG \u0110EN (DISTICHOCHLAMYS CITREA<\/em>) B\u1ea2N \u0110\u1ecaA<\/p>\n

<\/a>Ph\u1ea1m Th\u1ecb Kim H\u1ea1nh, Tr\u1ecbnh Th\u00f9y D\u01b0\u01a1ng, V\u0169 Ph\u01b0\u01a1ng Linh, L\u00e3 Tu\u1ea5n Ngh\u0129a<\/p>\n

Trung t\u00e2m T\u00e0i nguy\u00ean th\u1ef1c v\u1eadt, Vi\u1ec7n Khoa h\u1ecdc N\u00f4ng nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/strong><\/p>\n

G\u1eebng \u0111en (Distichochlamys citrea<\/em>) l\u00e0 m\u1ed9t lo\u00e0i th\u1ef1c v\u1eadt \u0111\u1eb7c h\u1eefu m\u1edbi \u1edf Vi\u1ec7t Nam. Hi\u1ec7n nay, trong t\u1ef1 nhi\u00ean G\u1eebng \u0111en (D. citrea<\/em>) \u0111\u01b0\u1ee3c ph\u00e2n b\u1ed1 h\u1eb9p v\u00e0 s\u1ed1 l\u01b0\u1ee3ng \u00edt. Tinh d\u1ea7u \u0111\u01b0\u1ee3c chi\u1ebft xu\u1ea5t t\u1eeb \u200b\u200bth\u00e2n, r\u1ec5 v\u00e0 l\u00e1 v\u1edbi c\u00e1c ho\u1ea1t ch\u1ea5t h\u00f3a h\u1ecdc nh\u01b0 1,8-cineole (30,7-43,7)%, \u03b2-citral (1,6-14)%, a-citral (2,5- 20,9)% v\u00e0 neryl acetate (4,1-11,1)%, \u03b1-pinene (1,8-4,5)%, \u03b2-pinene (2,8-7,0)%,
\nD-limonene (1,2-3,3)%, Geraniol (4 , 0-5,9)%, Neryl acetate (4,1-11,1)%,… Ho\u1ea1t ch\u1ea5t trong G\u1eebng \u0111en r\u1ea5t t\u1ed1t cho s\u1ee9c kh\u1ecfe v\u00e0 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 l\u00e0m d\u01b0\u1ee3c li\u1ec7u, m\u1ef9 ph\u1ea9m, th\u1ef1c ph\u1ea9m. Nh\u00e2n gi\u1ed1ng G\u1eebng \u0111en in vitro<\/em> hi\u1ec7u qu\u1ea3 b\u1eb1ng c\u00e1ch: Sau khi kh\u1eed tr\u00f9ng, ch\u1ed3i \u0111\u01b0\u1ee3c t\u00e1i sinh tr\u00ean m\u00f4i tr\u01b0\u1eddng (MS + 5g\/l Agar + 30g \u0111\u01b0\u1eddng + 100ml\/l n\u01b0\u1edbc d\u1eeba + 1mg\/l PVP + 2mg\/l BAP + Kn 0,2 mg\/l), ch\u1ed3i sau khi t\u00e1i sinh \u0111\u01b0\u1ee3c nh\u00e2n l\u00ean tr\u00ean m\u00f4i tr\u01b0\u1eddng: (MS + 5g\/l Agar + 30g \u0111\u01b0\u1eddng + 100m\/l n\u01b0\u1edbc d\u1eeba + 1mg\/l BAP + 1g\/l Casein + 0,2mg\/lKn). R\u1ec5 \u0111\u01b0\u1ee3c h\u00ecnh th\u00e0nh tr\u00ean m\u00f4i tr\u01b0\u1eddng (MS + 30g \u0111\u01b0\u1eddng + 100ml\/l n\u01b0\u1edbc d\u1eeba + 0,5mg\/l NAA). C\u00e2y tr\u1ed3ng trong v\u01b0\u1eddn \u01b0\u01a1m tr\u00ean gi\u00e1 th\u1ec3 (m\u00f9n d\u1eeba: tr\u1ea5u hun: \u0111\u1ea5t \u0111\u1ed3i s\u00e2u) t\u1ef7 l\u1ec7 (2: 1: 1) v\u00e0 che 75% \u00e1nh s\u00e1ng m\u1eb7t tr\u1eddi. Sau khi tr\u1ed3ng 10 ng\u00e0y phun ph\u00e2n b\u00f3n Grownmore (30N: 10P: 10K) n\u1ed3ng \u0111\u1ed9 0,5g\/l; 7 ng\u00e0y\/l\u1ea7n. Sau 3 th\u00e1ng, c\u00e2y con ph\u00e1t tri\u1ec3n t\u1ed1t, v\u1edbi 2,7 ch\u1ed3i m\u1edbi; 2 l\u00e1 m\u1edf c\u00e2y; Cao 138 mm; L\u00e1 d\u00e0i 82 mm v\u00e0 r\u1ed9ng 52 mm. L\u00e1 m\u00e0u xanh t\u1ef1 nhi\u00ean.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> G\u1eebng \u0111en (Distichochlamys citrea<\/em>), nu\u00f4i c\u1ea5y m\u00f4, in vitro<\/em>, nh\u00e2n gi\u1ed1ng<\/td>\n<\/tr>\n

\n

<\/a>Study on breeding of black ginger (Distichochlamys citrea<\/em>) by in vitro method<\/strong><\/p>\n

Black ginger (Distichochlamys citrea<\/em>) is a new endemic plant species in Vietnam. In nature, D. citrea<\/em> is narrowly distributed in small quantities. Essential oils could be extracted from stems, roots and leaves. The chemical active agents include: 1.8-cineole (30.7-43.7)%, \u03b2-citral (1.6-14)%, a-citral ( 2.5-20.9)% and neryl acetate (4.1-11.1)%, \u03b1-pinene (1.8-4.5)%, \u03b2-pinene (2.8-7.0)%, D-limonene (1.2-3.3)%, Geraniol (4.0-5.9)%, Neryl acetate (4.1-11.1)%,… Chemicals in ginger is considered to be good for health and can be used to make cosmetics, food. Effective breeding of black ginger by in vitro technique as follow: After sterilization, shoots were regenerated on the medium (MS + 5g\/l Agar + 30g sugar + 100ml\/l coconut water + 1mg\/l PVP + 2mg\/l BAP + Kn 0.2 mg\/l). After regeneration, shoots were multiplied on the medium: (MS + 5g\/l Agar + 30g sugar + 100ml\/l coconut water + 1mg\/l BAP + 1g\/l Casein + 0.2mg\/Kn). Roots were formed on the medium (MS + 30g sugar + 100ml\/l coconut water + 0.5mg\/l NAA). Young plants grown in a nursery with 75% sunlight cover. They were grown on a substrate (Coconut mulch: Husk: Hill land) with the ratio of 2: 1: 1, respectively. After 10 days, Grownmore fertilizer (30N: 10P: 10K) was added by spraying with 0.5g\/l concentration and frequency of 7 days\/time. After 3 months, the seedlings grown well with 2.7 new shoots; 138 mm high; leaves are 82 mm long and 52 mm wide.<\/p>\n

Keywords: <\/em><\/strong>Distichochlamys citrea, in vitro<\/em>, tissue culture, bredding<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>M\u1ee8C \u0110\u1ed8 BI\u1ebeN D\u1eca V\u1ec0 SINH TR\u01af\u1edeNG V\u00c0 CH\u1ea4T L\u01af\u1ee2NG TH\u00c2N C\u00c2Y GI\u1eeeA C\u00c1C XU\u1ea4T X\u1ee8 V\u00c0 GIA \u0110\u00ccNH M\u1ee0
\nTRONG C\u00c1C KH\u1ea2O NGHI\u1ec6M H\u1eacU TH\u1ebe<\/p>\n

\u00a0<\/a>Ph\u00ed H\u1ed3ng H\u1ea3i 1<\/sup>, La \u00c1nh D\u01b0\u01a1ng 1<\/sup>, B\u00f9i Th\u1ebf \u0110\u1ed3i 2<\/sup><\/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 L\u00e2m nghi\u1ec7p<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Nghi\u00ean c\u1ee9u m\u1ee9c \u0111\u1ed9 bi\u1ebfn d\u1ecb v\u1ec1 sinh tr\u01b0\u1edfng v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng th\u00e2n c\u00e2y gi\u1eefa c\u00e1c xu\u1ea5t x\u1ee9 v\u00e0 gia \u0111\u00ecnh M\u1ee1 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u1edf tu\u1ed5i 3 trong ba kh\u1ea3o nghi\u1ec7m xu\u1ea5t x\u1ee9 – h\u1eadu th\u1ebf t\u1ea1i Tuy\u00ean Quang, Y\u00ean B\u00e1i v\u00e0 Ngh\u1ec7 An. K\u1ebft qu\u1ea3 \u0111\u00e1nh gi\u00e1 cho th\u1ea5y c\u00f3 s\u1ef1 sai kh\u00e1c r\u00f5 r\u1ec7t v\u1ec1 sinh tr\u01b0\u1edfng (th\u1ec3 t\u00edch th\u00e2n c\u00e2y v\u00e0 \u0111\u01b0\u1eddng k\u00ednh ho\u1eb7c chi\u1ec1u cao t\u00f9y t\u1eebng kh\u1ea3o nghi\u1ec7m) v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng th\u00e2n c\u00e2y gi\u1eefa c\u00e1c xu\u1ea5t x\u1ee9 trong kh\u1ea3o nghi\u1ec7m t\u1ea1i Tuy\u00ean Quang v\u00e0 Y\u00ean B\u00e1i, nh\u01b0ng kh\u00f4ng c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 c\u1ea3 sinh tr\u01b0\u1edfng v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng th\u00e2n c\u00e2y gi\u1eefa c\u00e1c xu\u1ea5t x\u1ee9 v\u00e0 gia \u0111\u00ecnh trong kh\u1ea3o nghi\u1ec7m t\u1ea1i Ngh\u1ec7 An. T\u1ea1i Tuy\u00ean Quang, 2 xu\u1ea5t x\u1ee9 c\u00f3 sinh tr\u01b0\u1edfng t\u1ed1t nh\u1ea5t l\u00e0 Tuy\u00ean Quang, Ngh\u1ec7 An v\u00e0 v\u01b0\u1ee3t gi\u00e1 tr\u1ecb trung b\u00ecnh to\u00e0n kh\u1ea3o nghi\u1ec7m l\u1ea7n l\u01b0\u1ee3t l\u00e0 26,3% v\u00e0 10,5%. T\u1ea1i Y\u00ean B\u00e1i, 3 xu\u1ea5t x\u1ee9 c\u00f3 sinh tr\u01b0\u1edfng t\u1ed1t nh\u1ea5t l\u00e0 Tuy\u00ean Quang, B\u1eafc K\u1ea1n v\u00e0 Ngh\u1ec7 An, v\u01b0\u1ee3t t\u1eeb 12,8 – 21,1% so v\u1edbi gi\u00e1 tr\u1ecb trung b\u00ecnh to\u00e0n kh\u1ea3o nghi\u1ec7m. M\u1ee9c \u0111\u1ed9 bi\u1ebfn d\u1ecb gi\u1eefa c\u00e1c gia \u0111\u00ecnh M\u1ee1 trong c\u00e1c kh\u1ea3o nghi\u1ec7m l\u00e0 r\u1ea5t l\u1edbn. Ph\u00e2n t\u00edch th\u1ed1ng k\u1ebf cho th\u1ea5y c\u00f3 s\u1ef1 sai kh\u00e1c r\u00f5 r\u1ec7t v\u1ec1 sinh tr\u01b0\u1edfng v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng th\u00e2n c\u00e2y gi\u1eefa c\u00e1c gia \u0111\u00ecnh \u1edf c\u1ea3 Tuy\u00ean Quang v\u00e0 Y\u00ean B\u00e1i, tuy nhi\u00ean c\u0169ng kh\u00f4ng c\u00f3 s\u1ef1 sai kh\u00e1c t\u1ea1i kh\u1ea3o nghi\u1ec7m \u1edf Ngh\u1ec7 An. Ch\u1ecdn l\u1ecdc 5 gia \u0111\u00ecnh sinh tr\u01b0\u1edfng v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng th\u00e2n c\u00e2y t\u1ed1t nh\u1ea5t t\u1ea1i c\u00e1c kh\u1ea3o nghi\u1ec7m \u0111\u1ec1u c\u00f3 \u0111\u1ed9 v\u01b0\u1ee3t l\u1edbn so v\u1edbi trung b\u00ecnh kh\u1ea3o nghi\u1ec7m, bi\u1ebfn \u0111\u1ed9ng t\u1eeb 11,5% t\u1edbi 97,8% cho sinh tr\u01b0\u1edfng v\u00e0 t\u1eeb 9,8% t\u1edbi 28,8% cho \u0111\u1ed9 th\u1eb3ng th\u00e2n c\u00e2y. \u0110\u00e2y l\u00e0 nh\u1eefng gia \u0111\u00ecnh r\u1ea5t c\u00f3 tri\u1ec3n v\u1ecdng \u0111\u1ec3 ph\u00e1t tri\u1ec3n cho tr\u1ed3ng r\u1eebng g\u1ed7 l\u1edbn.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> M\u1ee1, Manglietia conifera<\/em>, bi\u1ebfn d\u1ecb, xu\u1ea5t x\u1ee9, gia \u0111\u00ecnh<\/td>\n<\/tr>\n

\n

<\/a>Variation on growth and stem straightness between provenances and families of Manglietia conifera <\/em>Dandy in the provenance-progeny tests<\/strong><\/p>\n

This variation research on growth and stem straightness between provenanvces and families of Manglietia conifera <\/em>was implemented at the age of three years in three provenance-progeny tests in Tuyen Quang, Yen Bai and Nghe An. Our evaluations showed that there were significant differences in growth (tree volume, diameter and\/or height) and stem straightness between provanances in Tuyen Quang and Yen Bai test, but non-significant differences in all of these research traits of provanances in Nghe An test. In Tuyen Quang, provenance of Tuyen Quang and Nghe An were outstanding at 3 year old. The mean conical volumes of two provenances were from 10.5% to 26.3% greater than the grand mean value of the tests. In Yen Bai, 3 provenances of Tuyen Quang, Bac Kan and Nghe An were exhibited significant greater conical volumes (exceeeded from 12.8 – 21.1%) than the average volume of the test. Large variation between families on both growth and stem straightness in the tests was also found. Similar to provenance variation, there were significant differences in growth and stem straightness between families in Tuyen Quang and Yen Bai test, but non-significant differences in Nghe An test. The 5 superior families selected from the tests performed greater growth and stem straightness than other families in all tests. In comparison with the mean values of the tests, there were a range of 11.5 – 97.8% and 9.8 – 28.8% increase in growth traits and stem straightness respectively. These 5 superior families therefore are more suitable for planting high-quality timber plantations in Tuyen Quang, Yen Bai and Nghe An province.<\/p>\n

Keywords:<\/em><\/strong> Mo; Manglietia conifera<\/em>; variation; provenance; family<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U NH\u00c2N GI\u1ed0NG C\u00c2Y T\u00d9NG \u0110EN\u00a0(Diospyros vaccinioides <\/em>Lindl.) T\u1ea0I QU\u1ea2NG NINH<\/p>\n

<\/a>Phan Thanh Ngh\u1ecb1<\/sup>, Nguy\u1ec5n V\u0103n H\u00f9ng1<\/sup>, Tr\u1ecbnh Th\u1ecb Thon1<\/sup>, Ph\u1ea1m Thu H\u00e02<\/sup><\/p>\n

1<\/sup> Ban qu\u1ea3n l\u00fd V\u01b0\u1eddn Qu\u1ed1c gia B\u00e1i T\u1eed Long
\n2<\/sup> Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc N\u00f4ng L\u00e2m, \u0110\u1ea1i h\u1ecdc Th\u00e1i Nguy\u00ean<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

C\u00e2y T\u00f9ng \u0111en c\u00f3 gi\u00e1 tr\u1ecb d\u01b0\u1ee3c li\u1ec7u v\u00e0 c\u0169ng \u0111\u01b0\u1ee3c \u01b0a chu\u1ed9ng l\u00e0m c\u00e2y c\u1ea3nh nh\u01b0ng ch\u00fang sinh tr\u01b0\u1edfng r\u1ea5t ch\u1eadm, t\u1ef7 l\u1ec7 h\u1ea1t n\u1ea3y m\u1ea7m trong t\u1ef1 nhi\u00ean r\u1ea5t th\u1ea5p. Trong nh\u1eefng n\u0103m qua vi\u1ec7c khai th\u00e1c t\u1eadn di\u1ec7t \u0111\u00e3 l\u00e0m c\u1ea1n ki\u1ec7t ngu\u1ed3n gen lo\u00e0i c\u00e2y n\u00e0y trong t\u1ef1 nhi\u00ean. Nghi\u00ean c\u1ee9u n\u00e0y nh\u1eb1m x\u00e1c \u0111\u1ecbnh m\u1ed9t s\u1ed1 bi\u1ec7n ph\u00e1p nh\u00e2n gi\u1ed1ng T\u00f9ng \u0111en t\u1eeb h\u1ea1t v\u00e0 hom, trong \u0111\u00f3 th\u00ed nghi\u1ec7m gieo \u01b0\u01a1m t\u1eeb h\u1ea1t \u00e1p d\u1ee5ng 03 c\u00f4ng th\u1ee9c nhi\u1ec7t \u0111\u1ed9 n\u01b0\u1edbc x\u1eed l\u00fd h\u1ea1t (40, 70 v\u00e0 100o<\/sup>C), 03 c\u00f4ng th\u1ee9c n\u1ed3ng \u0111\u1ed9 thu\u1ed1c N3M (10.000, 15.000 v\u00e0 20.000 ppm) k\u00edch th\u00edch n\u1ea3y m\u1ea7m h\u1ea1t gi\u1ed1ng, 03 lo\u1ea1i gi\u00e1 th\u1ec3 \u01b0\u01a1m c\u00e2y (100% \u0111\u1ea5t, 90% \u0111\u1ea5t + 10% ph\u00e2n vi sinh v\u00e0 90% \u0111\u1ea5t + 9,5% ph\u00e2n vi sinh + 0,5% ph\u00e2n NPK). Th\u00ed nghi\u1ec7m gi\u00e2m hom \u00e1p d\u1ee5ng 04 c\u00f4ng th\u1ee9c n\u1ed3ng \u0111\u1ed9 thu\u1ed1c k\u00edch th\u00edch ra r\u1ec5 N3M (5.000, 10.000, 15.000 v\u00e0 20.000 ppm), 03 c\u00f4ng th\u1ee9c gi\u00e1 th\u1ec3 gi\u00e2m hom (100% c\u00e1t s\u00f4ng, 50% c\u00e1t s\u00f4ng + 50% \u0111\u1ea5t v\u00e0 100% \u0111\u1ea5t). K\u1ebft qu\u1ea3 cho th\u1ea5y h\u1ea1t gi\u1ed1ng T\u00f9ng \u0111en x\u1eed l\u00fd b\u1eb1ng n\u01b0\u1edbc n\u00f3ng 70o<\/sup>C trong 12 gi\u1edd c\u00f3 t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m cao nh\u1ea5t, \u0111\u1ea1t 75,93%; ng\u00e2m h\u1ea1t b\u1eb1ng dung d\u1ecbch N3M, n\u1ed3ng \u0111\u1ed9 15.000 ppm trong th\u1eddi gian 1 gi\u1edd cho t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m 67,77%; gi\u00e1 th\u1ec3 gieo \u01b0\u01a1m h\u1ea1t t\u1ed1t nh\u1ea5t l\u00e0 90% \u0111\u1ea5t + 9,5% ph\u00e2n vi sinh + 0,5% ph\u00e2n NPK. X\u1eed l\u00fd hom T\u00f9ng \u0111en b\u1eb1ng thu\u1ed1c k\u00edch th\u00edch ra r\u1ec5 N3M n\u1ed3ng \u0111\u1ed9 10.000 ppm cho k\u1ebft qu\u1ea3 t\u1ed1t nh\u1ea5t, t\u1ef7 l\u1ec7 ra r\u1ec5 \u0111\u1ea1t 46,91%; gi\u00e1 th\u1ec3 c\u00e1t s\u00f4ng ph\u00f9 h\u1ee3p nh\u1ea5t \u0111\u1ec3 gi\u00e2m hom c\u00e2y T\u00f9ng \u0111en.<\/p>\n

T\u1eeb kh\u00f3a:<\/strong> Diospyros vaccinioides<\/em>, gi\u00e2m hom, nh\u00e2n gi\u1ed1ng, T\u00f9ng \u0111en<\/td>\n<\/tr>\n

\n

<\/a>Study on propagating of Diospyros vaccinioides<\/em> in Quang Ninh province<\/strong><\/p>\n

Diospyros vaccinioides<\/em> has medicinal value and is also popular as bonsai but they grow very slowly, seed germination rate in the wild is very low. It is ranked in the Convention of International Trade of Endangered Species of Flora and Fauna because of the extent of habitat destruction and illegal harvesting. This research aims to identify some methods of propagating D. vaccinioides<\/em> from seeds and cuttings. Seedling experiments using 03 formulas treatment temperature of water (40, 70 and 100o<\/sup>C), 03 formulas of N3M concentration (10,000, 15,000 and 20,000 ppm) to stimulate seed germination, 03 types of seedling substrate (100% soil, 90% soil + 10% compost and 90% soil + 9.5% compost + 0.5% NPK). Cutting experiments were conducted to identify the efficacy of N3M concentration (5.000, 10,000, 15,000 and 20,000 ppm), rooting substrate (100% river sand, 50% river sand + 50% soil and 100% soil). The results showed that seeds treated with 70o<\/sup>C of water for 12 hours had the highest germination rate (75.93%); soaking seeds with N3M at a concentration of 15,000 ppm for 1 hour gives germination rate of 70.00%; best seedling substrate is 90% soil + 9.5% compost + 0.5% NPK. Treatment of cuttings with N3M at a concentration of 10,000 ppm had the best rooting rate reaches (46.91%); river sand is best suited for D. vaccinioides<\/em> cuttings.<\/p>\n

Keywords:<\/em><\/strong> Diospyros vaccinioides, <\/em>cutting, seedling, hoormon<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U \u0110\u1eb6C \u0110I\u1ec2M C\u1ea4U TR\u00daC V\u00c0 T\u00c1I SINH T\u1ef0 NHI\u00caN R\u1eeaNG T\u1ef0 NHI\u00caN TR\u00caN \u0111\u1ea4t C\u00c1T (r\u00fa c\u00e1t)
\nT\u1ea0I HUY\u1ec6N TRI\u1ec6U PHONG, T\u1ec8NH QU\u1ea2NG TR\u1eca<\/p>\n

<\/a>Ho\u00e0ng Huy Tu\u1ea5n, Nguy\u1ec5n Duy Phong, Tr\u1ea7n Th\u1ecb Th\u00fay H\u1eb1ng,
\nPh\u1ea1m C\u01b0\u1eddng, Ng\u00f4 Th\u1ecb Ph\u01b0\u01a1ng Anh<\/p>\n

Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc N\u00f4ng L\u00e2m, \u0110\u1ea1i h\u1ecdc Hu\u1ebf<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u v\u1ec1 \u0111\u1eb7c \u0111i\u1ec3m c\u1ea5u tr\u00fac v\u00e0 t\u00e1i sinh r\u1eebng t\u1ef1 nhi\u00ean tr\u00ean r\u00fa c\u00e1t t\u1ea1i huy\u1ec7n Tri\u1ec7u Phong, t\u1ec9nh Qu\u1ea3ng Tr\u1ecb cho th\u1ea5y: M\u1eadt \u0111\u1ed9 t\u1ea7ng c\u00e2y cao dao \u0111\u1ed9ng t\u1eeb 320-740 c\u00e2y\/ha v\u1edbi \u0111\u01b0\u1eddng k\u00ednh trung b\u00ecnh t\u1eeb 6,8-10,6 cm v\u00e0 chi\u1ec1u cao trung b\u00ecnh l\u00e0 3,9-6,6 m. S\u1ed1 l\u01b0\u1ee3ng lo\u00e0i c\u00e2y tham gia v\u00e0o c\u00e1c qu\u1ea7n x\u00e3 th\u1ef1c v\u1eadt r\u1eebng trong khu v\u1ef1c nghi\u00ean c\u1ee9u bi\u1ebfn \u0111\u1ed9ng t\u1eeb 4 – 11 lo\u00e0i. Trong c\u1ea3 3 x\u00e3 nghi\u00ean c\u1ee9u \u0111\u1ec1u xu\u1ea5t hi\u1ec7n c\u00e1c lo\u00e0i c\u00e2y ti\u00eau bi\u1ec3u nh\u01b0: Tr\u00e2m b\u00f9 (Syzygium corticosum<\/em>), Ran (Memecylon edule<\/em>), X\u0103ng m\u00e3 (Carallia Brachiata<\/em>), B\u1ed9p (Scolopia spinosa<\/em>), N\u1ed5 (Syzygium zeylanicum<\/em>), \u0111a s\u1ed1 l\u00e0 c\u00e2y c\u00f3 gi\u00e1 tr\u1ecb sinh th\u00e1i cao trong qu\u00e1 tr\u00ecnh ph\u1ee5c h\u1ed3i r\u1eebng, v\u1edbi vai tr\u00f2 l\u00e0 nh\u1eefng c\u00e2y ti\u00ean phong t\u1ea1o l\u1eadp, ph\u1ee5c h\u1ed3i ho\u00e0n c\u1ea3nh r\u1eebng theo quy lu\u1eadt t\u1ef1 nhi\u00ean l\u00ean c\u1ea5p cao h\u01a1n. Nh\u00f3m c\u00e2y \u01b0u th\u1ebf c\u1ee7a t\u1ea7ng c\u00e2y t\u00e1i sinh ph\u1ea7n l\u1edbn c\u0169ng l\u00e0 nh\u00f3m c\u00e2y \u01b0u th\u1ebf trong t\u1ea7ng c\u00e2y cao nh\u01b0 Tr\u00e2m b\u00f9 (Syzygium corticosum<\/em>), N\u1ed5 (Syzygium zeylanicum<\/em>), B\u1ed9p (Scolopia spinosa<\/em>), B\u00ed b\u00e1i (Acronychia pedunculata<\/em>). M\u1eadt \u0111\u1ed9 c\u00e2y t\u00e1i sinh t\u1ea1i khu v\u1ef1c nghi\u00ean c\u1ee9u kh\u00e1 cao, dao \u0111\u1ed9ng t\u1eeb 10.586-16.773 c\u00e2y\/ha. C\u00e2y t\u00e1i sinh tri\u1ec3n v\u1ecdng chi\u1ebfm kho\u1ea3ng 36,4% s\u1ed1 l\u01b0\u1ee3ng c\u00e2y t\u00e1i sinh. C\u1ea5p chi\u1ec1u cao c\u1ee7a l\u1edbp c\u00e2y t\u00e1i sinh chia l\u00e0m 4 c\u1ea5p, trong \u0111\u00f3 s\u1ed1 c\u00e2y t\u00e1i sinh \u1edf c\u1ea5p chi\u1ec1u cao < 0,5m chi\u1ebfm t\u1ef7 l\u1ec7 l\u1edbn nh\u1ea5t (tr\u00ean 40%). T\u1ef7 l\u1ec7 c\u00e2y t\u00e1i sinh h\u1ea1t chi\u1ebfm 75,9% v\u00e0 t\u00e1i sinh ch\u1ed3i chi\u1ebfm 24,1%. Ch\u1ea5t l\u01b0\u1ee3ng c\u00e2y t\u00e1i sinh c\u1ee7a khu v\u1ef1c nghi\u00ean c\u1ee9u ch\u1ee7 y\u1ebfu l\u00e0 trung b\u00ecnh chi\u1ebfm t\u1eeb 54,0 – 67,8%, ti\u1ebfp \u0111\u1ebfn l\u00e0 ch\u1ea5t l\u01b0\u1ee3ng c\u00e2y t\u1ed1t chi\u1ebfm t\u1eeb 23,6 – 37,2%, ch\u1ea5t l\u01b0\u1ee3ng c\u00e2y t\u00e1i sinh x\u1ea5u chi\u1ebfm t\u1eeb 8,5 – 12,4%.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> C\u1ea5u tr\u00fac r\u1eebng, r\u00fa c\u00e1t, t\u00e1i sinh t\u1ef1 nhi\u00ean, Tri\u1ec7u Phong.<\/td>\n<\/tr>\n

\n

<\/a>Research on forest structure characteristics and natural rengeneration of natural forests on sandy soil (sandy forest) in Trieu Phong district, Quang Tri province<\/strong><\/p>\n

Results of research on forest structure characteristics and natural regeneration on sandy forests in Trieu Phong district, Quang Tri province show that: the density of high tree layer is from 320-740 trees per ha, with an average diameter of 6.8 -10.6 cm, and average height is 3.9-6.6m. The number of tree species involved in the forest plant communities in research area ranged from 4 to 11 species. In three studied communes, there are typical tree species such as Syzygium corticosum<\/em>, Memecylon edule<\/em>, Carallia brachiata<\/em>, Scolopia spinosa<\/em>, Syzygium zeylanicum<\/em> that are the tree with high ecological value in the forest restoration process, with the role of a pioneer tree to create and restore forest conditions according to the natural rule to a higher level. Almost the dominant trees of regeneration tree layer are the dominant trees in the high tree layer such as Syzygium corticosum<\/em>, Syzygium zeylanicum<\/em>, Scolopia spinosa<\/em>. The density of regeneration trees in the study area is quite high, ranging from 10,586 to 16,773 trees per ha with 36.4% prospective regeneration trees. The height of the regeneration tree layer is divided into 4 classes, in which the number of regeneration trees at the height class under 0.5m is largest proportion (over 40%). Seed regeneration rate is approximate 75.9% and shoot regeneration rate is approximate 24.1%. The quality regeneration trees in the study area is mainly average quality, accounting from 54.0 – 67.8%, good quality regeneration tree is from 23.6 – 37.2%, and the bad regeneration tree is from 8.5 – 12.4%.<\/p>\n

Keywords:<\/em><\/strong> Forest structure, natural regeneration, sandy forest, Trieu Phong district<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u1ea2NH H\u01af\u1edeNG C\u1ee6A M\u1eacT \u0110\u1ed8 TR\u1ed2NG, C\u01af\u1edcNG \u0110\u1ed8 T\u1ec8A TH\u01afA\u00a0\u0110\u1ebeN TU\u1ed4I KHAI TH\u00c1C NH\u1eb0M CUNG C\u1ea4P G\u1ed6 L\u1edaN \u0110\u1ed0I V\u1edaI
\nR\u1eeaNG TR\u00c0M L\u00c1 D\u00c0I T\u1ea0I HUY\u1ec6N TH\u1ea0NH H\u00d3A, T\u1ec8NH LONG AN<\/p>\n

<\/a>Ng\u00f4 V\u0103n Ng\u1ecdc, V\u00f5 Trung Ki\u00ean, L\u00ea Thanh Quang,
\nNguy\u1ec5n Tr\u1ecdng Nam, Nguy\u1ec5n Trung Th\u00f4ng<\/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 \u1ea3nh h\u01b0\u1edfng c\u1ee7a m\u1eadt \u0111\u1ed9 tr\u1ed3ng, c\u01b0\u1eddng \u0111\u1ed9 t\u1ec9a th\u01b0a \u0111\u1ebfn tu\u1ed5i khai th\u00e1c nh\u1eb1m cung c\u1ea5p g\u1ed7 l\u1edbn \u0111\u1ed1i v\u1edbi r\u1eebng Tr\u00e0m l\u00e1 d\u00e0i (M. leucadendra)<\/em> t\u1ea1i huy\u1ec7n Th\u1ea1nh H\u00f3a, t\u1ec9nh Long An. \u0110\u00e2y l\u00e0 n\u1ed9i dung thu\u1ed9c \u0110\u1ec1 t\u00e0i nghi\u00ean c\u1ee9u c\u00e1c bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt tr\u1ed3ng Tr\u00e0m l\u00e1 d\u00e0i (M. leucadendra)<\/em> th\u00e2m canh cung c\u1ea5p g\u1ed7 l\u1edbn \u0111\u00e3 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n t\u1eeb n\u0103m 2014 t\u1ea1i Tr\u1ea1m th\u1ef1c nghi\u1ec7m L\u00e2m nghi\u1ec7p Th\u1ea1nh H\u00f3a. M\u1ee5c ti\u00eau c\u1ee7a nghi\u00ean c\u1ee9u nh\u1eb1m t\u00ecm ra \u0111\u01b0\u1ee3c c\u00e1c c\u00f4ng th\u1ee9c tr\u1ed3ng v\u00e0 t\u1ec9a th\u01b0a ph\u00f9 h\u1ee3p cho tr\u1ed3ng r\u1eebng cung c\u1ea5p g\u1ed7 l\u1edbn. Nghi\u00ean c\u1ee9u \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n v\u1edbi 9 c\u00f4ng th\u1ee9c tr\u1ed3ng v\u00e0 t\u1ec9a th\u01b0a (C\u1ef1 ly tr\u1ed3ng 2 \u00d7 2 m T0 kh\u00f4ng t\u1ec9a; c\u1ef1 ly tr\u1ed3ng 1 \u00d7 2 m g\u1ed3m c\u00f3 T1 kh\u00f4ng t\u1ec9a; T2 t\u1ec9a th\u01b0a 50% l\u00fac 24 th\u00e1ng; c\u1ef1 ly tr\u1ed3ng 1 \u00d7 1 m g\u1ed3m c\u00f3 T3 kh\u00f4ng t\u1ec9a; T4 t\u1ec9a 25% l\u00fac 24 th\u00e1ng; T5 t\u1ec9a 25% l\u00fac 24 th\u00e1ng v\u00e0 25% l\u00fac 36 th\u00e1ng; c\u1ef1 ly tr\u1ed3ng 0,5 \u00d7 1 m g\u1ed3m c\u00f3 T6 kh\u00f4ng t\u1ec9a; T7 t\u1ec9a 50% l\u00fac 24 th\u00e1ng v\u00e0 T8 t\u1ec9a 50% l\u00fac 24 th\u00e1ng v\u00e0 12,5% l\u00fac 36 th\u00e1ng). Th\u00ed nghi\u1ec7m \u0111\u01b0\u1ee3c b\u1ed1 tr\u00ed theo kh\u1ed1i ng\u1eabu nhi\u00ean \u0111\u1ea7y \u0111\u1ee7 v\u1edbi 3 l\u1ea7n l\u1eb7p l\u1ea1i. Di\u1ec7n t\u00edch m\u1ed7i \u00f4 th\u00ed nghi\u1ec7m l\u00e0 100 m2<\/sup>. K\u1ebft qu\u1ea3 c\u1ee7a nghi\u00ean c\u1ee9u cho th\u1ea5y r\u1eebng tr\u1ed3ng \u0111\u1ebfn 4,7 tu\u1ed5i c\u00f3 sinh tr\u01b0\u1edfng v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh c\u1ee7a c\u00e1c c\u00f4ng th\u1ee9c c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t c\u00f3 \u00fd ngh\u0129a (P <0,05). C\u00f4ng th\u1ee9c t\u1ec9a th\u01b0a T5 \u00e1p d\u1ee5ng t\u1ec9a th\u01b0a (2 l\u1ea7n) c\u00f3 ch\u1ec9 s\u1ed1 \u0111\u01b0\u1eddng k\u00ednh \u0111\u1ea1t 9,0 cm cao h\u01a1n 2,0 cm so v\u1edbi c\u00f4ng th\u1ee9c T3 kh\u00f4ng t\u1ec9a l\u00e0 7,0 cm; sinh tr\u01b0\u1edfng v\u1ec1 chi\u1ec1u cao c\u1ee7a c\u00e1c c\u00f4ng th\u1ee9c c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t c\u00f3 \u00fd ngh\u0129a (P <0,05). C\u00f4ng th\u1ee9c T1, T2, T5 v\u00e0 T8 c\u00f3 ch\u1ec9 s\u1ed1 chi\u1ec1u cao b\u00ecnh qu\u00e2n t\u1ed1t nh\u1ea5t \u2248 9,3 m; n\u0103ng su\u1ea5t v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng r\u1eebng tr\u1ed3ng th\u00ec c\u00f4ng th\u1ee9c T1 v\u00e0 T5 l\u00e0 02 c\u00f4ng th\u1ee9c c\u00f3 tri\u1ec3n v\u1ecdng trong tr\u1ed3ng r\u1eebng cung c\u1ea5p g\u1ed7n l\u1edbn. Trong \u0111\u00f3, T5 l\u00e0 c\u00f4ng th\u1ee9c \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 t\u1ed1t nh\u1ea5t c\u00f3 c\u00e1c ch\u1ec9 s\u1ed1 D1,3 \u2248 9,0 cm; Hvn \u2248 9,3 m; MAI \u2248 25,0 m3<\/sup>\/n\u0103m\/ha v\u00e0 ph\u1ea9m ch\u1ea5t c\u00e2y t\u1ed1t \u2248 96% v\u00e0 k\u1ebf \u0111\u1ebfn l\u00e0 T1 c\u00f3 c\u00e1c ch\u1ec9 s\u1ed1 D1,3 \u2248 8,6 cm; Hvn \u2248 9,3 m; MAI \u2248 24,3 m3<\/sup>\/n\u0103m\/ha v\u00e0 ph\u1ea9m ch\u1ea5t c\u00e2y t\u1ed1t \u2248 80%. K\u1ebft qu\u1ea3 d\u1ef1 b\u00e1o tu\u1ed5i khai th\u00e1c r\u1eebng tr\u1ed3ng Tr\u00e0m l\u00e1 d\u00e0i \u0111\u1ea1t m\u1ee5c ti\u00eau cung c\u1ea5p g\u1ed7 l\u1edbn (D1,3<\/sub> \u2265 16 cm) c\u1ee7a c\u00f4ng th\u1ee9c T1 l\u00e0 12,5 tu\u1ed5i v\u00e0 T5 l\u00e0 11,3 tu\u1ed5i.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Tr\u00e0m l\u00e1 d\u00e0i, t\u1ec9a th\u01b0a, d\u1ef1 b\u00e1o, \u0111\u1ea5t ph\u00e8n, Long An<\/td>\n<\/tr>\n

\n

<\/a>Efficiency of planting stock and thinning to havesting time of M. leucadendra <\/em>plantation for sawlog in Thanh Hoa district, Long An province<\/strong><\/p>\n

\u201cResearch on efficiency of planting stock and thinning to havesting time of Melaleuca leucadendra <\/em>plantation in Thanh Hoa District, Long An Province\u201d belong to scientific research topic on the technical measures for intensive planting of M. leucadendra<\/em> providing the large wood establish at Thanh Hoa Forestry Experiment Station in 2014. The objective of this study was finding the best method from all experimental treatments for planting and thinning trees appropriate with the purpose to product large wood. Field experiment\u00a0consisted of nine\u00a0treatments that planting and thinning (With the density 2 \u00b4 2 m inclusion T0 – not thinning; the density 1 \u00b4 2 m inclusion: T1 not thinning; T2 thinning 50% at 24 months; the density 1m \u00b4 1m inclusion: T3 not thinning; T4 thinning 25% at 24 months and T5 thinning 25% at 24 months and 25% at 36 months and the density 0.5 \u00b4 1 m inclusion: T6 not thinning; T7 thinning 50% at 24 months and T8 thinning 50% at 24 months and 12.5% at 36 months). The experimental treatments designed in The Randomized Complete Block Design (RCBD) method with three replications. The area of each experimental plot is 100 m2<\/sup>. Results of the experiment indicated that M. leucadendra<\/em> in the age of 4.7 years has significantly different in diameter growth between experimental treatments (P < 0.05). The treatment T5 has the tree diameter get 9.0 cm, higher than 2.0 cm compare with the tree diameter in treatment T3 not thinning is 7 cm; significantly different in heigh growth between experimental treatments (P < 0.05). The treatments T1, T2, T5 v\u00e0 T8 have the best average height compare with other treatments and they get around 9.3 m. Comparison for the productivity and quality, the treatments T1, T5 were prospective with producing the large wood. In which, the best experimental treatment is T5 with the very good indicates including DBH \u2248 9.0 cm; Hvn \u2248 9.3 m; MAI \u2248 25.0 m3<\/sup>\/year\/ha and the trees have good quality get around 96.0%, the second is T1 have DBH \u2248 8.6 cm; Hvn \u2248 9.3 m; MAI \u2248 24.3 m3<\/sup>\/year\/ha and the trees have good quality get around 80%. The result of the prediction for harvesting age of Melaleuca leucadendra<\/em> plantation supply of large timber (DBH \u2265 16 cm) consist of treatment T1 is 12.5 years old and treatment T5 is 11.3 years old.<\/p>\n

Keywords:<\/em><\/strong> Melaleuca leucadendra, thinning, forecasting, acid sulphate soil, Long An province<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>T\u0102NG TR\u01af\u1edeNG \u0110\u01af\u1edcNG K\u00cdNH V\u00c0 T\u1ef6 L\u1ec6 CH\u1ebeT C\u1ee6A C\u00c2Y C\u00c1 TH\u1ec2 \u1ede R\u1eeaNG T\u1ef0 NHI\u00caN TRUNG B\u00ccNH V\u00c0 GI\u00c0U
\nT\u1ea0I KHU B\u1ea2O T\u1ed2N THI\u00caN NHI\u00caN V\u0102N H\u00d3A \u0110\u1ed2NG NAI<\/p>\n

<\/a>Nguy\u1ec5n Thanh Tu\u1ea5n1<\/sup>, Tr\u1ea7n Thanh C\u01b0\u1eddng2<\/sup>, <\/sub>Tr\u1ea7n Quang B\u1ea3o3<\/sup><\/p>\n

1<\/sup>Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p – Ph\u00e2n hi\u1ec7u \u0110\u1ed3ng Nai
\n2<\/sup>Ph\u00e2n vi\u1ec7n \u0110i\u1ec1u tra, Quy ho\u1ea1ch r\u1eebng Nam B\u1ed9
\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

M\u00f4 h\u00ecnh t\u0103ng tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh v\u00e0 t\u1ef7 l\u1ec7 c\u00e2y ch\u1ebft t\u1ef1 nhi\u00ean th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 d\u1ef1 \u0111o\u00e1n s\u1ea3n l\u01b0\u1ee3ng v\u00e0 \u0111\u1ed9ng th\u00e1i c\u1ee7a l\u00e2m ph\u1ea7n, n\u00f3 c\u00f3 \u00fd ngh\u0129a quan tr\u1ecdng trong qu\u1ea3n l\u00fd r\u1eebng. B\u00e0i b\u00e1o s\u1eed d\u1ee5ng d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c thu th\u1eadp t\u1eeb c\u00e1c \u00f4 \u0111\u1ecbnh v\u1ecb \u0111\u1ec3 x\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh t\u0103ng tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh v\u00e0 t\u1ef7 l\u1ec7 c\u00e2y ch\u1ebft cho tr\u1ea1ng th\u00e1i r\u1eebng trung b\u00ecnh v\u00e0 gi\u00e0u t\u1ea1i Khu b\u1ea3o t\u1ed3n thi\u00ean nhi\u00ean V\u0103n h\u00f3a \u0110\u1ed3ng Nai. D\u1ea1ng h\u00e0m phi tuy\u1ebfn v\u00e0 Logistic \u0111\u00e3 \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn \u0111\u1ec3 m\u00f4 ph\u1ecfng t\u0103ng tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh (ZD) v\u00e0 \u01b0\u1edbc l\u01b0\u1ee3ng x\u00e1c su\u1ea5t c\u00e2y b\u1ecb ch\u1ebft, v\u1edbi c\u00e1c bi\u1ebfn d\u1ef1 b\u00e1o l\u00e0 k\u00edch th\u01b0\u1edbc th\u00e2n c\u00e2y (\u0111\u01b0\u1eddng k\u00ednh: DBH), ph\u1ea9m ch\u1ea5t v\u00e0 m\u1ed1i quan h\u1ec7 v\u1ecb tr\u00ed gi\u1eefa c\u00e1c c\u00e2y. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y DBH v\u00e0 ph\u1ea9m ch\u1ea5t c\u00e2y r\u1eebng l\u00e0 c\u00e1c bi\u1ebfn c\u00f3 \u00fd ngh\u0129a quan tr\u1ecdng d\u1ef1 \u0111o\u00e1n ZD. C\u1ee5 th\u1ec3, ZD t\u0103ng theo DBH, sau khi \u0111\u1ea1t gi\u00e1 tr\u1ecb l\u1edbn nh\u1ea5t ZD c\u00f3 xu h\u01b0\u1edbng gi\u1ea3m v\u00e0 ti\u1ec7m c\u1eadn 0 khi DBH ti\u1ec7m c\u1eadn t\u1ed1i \u0111a. T\u1ef7 l\u1ec7 c\u00e2y b\u1ecb ch\u1ebft trong chu k\u1ef3 \u0111i\u1ec1u tra \u1edf r\u1eebng gi\u00e0u v\u00e0 trung b\u00ecnh l\u1ea7n l\u01b0\u1ee3t l\u00e0 10,94% v\u00e0 15,67%. Ngo\u00e0i ra, c\u00e1c nh\u00e2n t\u1ed1 c\u00f3 m\u1ed1i t\u01b0\u01a1ng quan ch\u1eb7t v\u1edbi x\u00e1c su\u1ea5t c\u00e2y ch\u1ebft bao g\u1ed3m: DBH, ch\u1ec9 s\u1ed1 c\u1ea1nh tranh t\u00e1n v\u00e0 ph\u1ea9m ch\u1ea5t c\u00e2y. C\u1ee5 th\u1ec3, giai \u0111o\u1ea1n c\u00e2y non x\u00e1c su\u1ea5t ch\u1ebft t\u1ef1 nhi\u00ean th\u01b0\u1eddng cao, b\u01b0\u1edbc v\u00e0o giai \u0111o\u1ea1n l\u00e2m ph\u1ea7n \u1ed5n \u0111\u1ecbnh x\u00e1c su\u1ea5t c\u00e2y ch\u1ebft gi\u1ea3m, nh\u01b0ng khi c\u00e2y gi\u00e0 c\u1ed7i c\u00f3 xu h\u01b0\u1edbng t\u0103ng tr\u1edf l\u1ea1i. Ph\u1ea9m ch\u1ea5t l\u00e0 bi\u1ebfn quan tr\u1ecdng \u1edf c\u00e1c m\u00f4 h\u00ecnh d\u1ef1 b\u00e1o sinh tr\u01b0\u1edfng c\u00e2y c\u00e1 th\u1ec3, so v\u1edbi c\u00e2y c\u00f3 ph\u1ea9m ch\u1ea5t t\u1ed1t, ZD v\u00e0 t\u1ef7 l\u1ec7 s\u1ed1ng c\u1ee7a nh\u1eefng c\u00e2y c\u00f3 ph\u1ea9m ch\u1ea5t trung b\u00ecnh v\u00e0 x\u1ea5u gi\u1ea3m r\u00f5 r\u1ec7t. K\u1ebft qu\u1ea3 c\u1ee7a nghi\u00ean c\u1ee9u kh\u1eb3ng \u0111\u1ecbnh c\u00e1c nh\u00e2n t\u1ed1 \u0111i\u1ec1u tra nh\u01b0 DBH, ph\u1ea9m ch\u1ea5t v\u00e0 ch\u1ec9 s\u1ed1 Hegyi c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 d\u1ef1 \u0111o\u00e1n sinh tr\u01b0\u1edfng c\u00e2y c\u00e1 th\u1ec3 \u1edf r\u1eebng m\u01b0a nhi\u1ec7t \u0111\u1edbi c\u00f3 c\u1ea5u tr\u00fac ph\u1ee9c t\u1ea1p.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> M\u00f4 h\u00ecnh sinh tr\u01b0\u1edfng c\u00e2y c\u00e1 th\u1ec3, m\u00f4 h\u00ecnh Logistic, r\u1eebng nhi\u1ec7t \u0111\u1edbi, t\u1ef7 l\u1ec7 s\u1ed1ng<\/td>\n<\/tr>\n

\n

<\/a>Individual tree diameter increment and mortality models for medium and rich forest in Dong Nai Culture and Nature Reserve<\/strong><\/p>\n

Individual tree diameter increment and mortality models constitute an individual-tree growth model which can be used to predict stand yield and forest dynamic. Being able to predict tree diameter growth and the survival probability provides significant insights into forest management decision support. In this study, we used data from permanent sample plots to develop an individual tree growth and mortality models for the medium forest and the rich forest in Dong Nai Culture and Nature Reserve. Diameter increment equations were fitted by nonlinear models, while logistic regression models were used to estimate individual tree survival probability based on tree tree size, tree quality, competition, and relative position of trees in stands. The resulting models showed that the main determinants of tree growth were shown to be tree size variables (diameter at breast height: DBH) and tree quality. Specifically, with increasing DBH, 5-years diameter growth of a given tree increases and approach asymptotes. After reaching a peak, 5-years diameter growth decrease and approaches zero. During the five-year period, the observed trees died were 10.94% for the rich forest and 15.67% for the medium forest. Logistic regression analysis revealed that mortality rate were affected by DBH, distance dependent competition indices and tree quality. Moreover, the resulting models also showed that trees usually have relatively high mortality in the early stages. As trees increase in DBH, survival probability increases and becomes stable over the middle of the size range. At older stages, survival probability decreases again. Finally, these results suggest that both growth and mortality rates were affected by tree quality. For instance, diameter increment and survial rate in medium quality and bad quality are significantly lower than good quality trees. Our findings thus appear to support the critical assumption that tree size (DBH), tree quality and competition index can be used to predict DBH growth and survival probability of individual tree for complex stands of tropical forest.<\/p>\n

Keywords:<\/em><\/strong> Modeling individual tree growth, logistic regression models, tropical forest, survival probability<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u0110\u00c1NH GI\u00c1 TR\u1eee L\u01af\u1ee2NG V\u00c0 KH\u1ea2 N\u0102NG H\u1ea4P TH\u1ee4 CARBON C\u1ee6A R\u1eeaNG NG\u1eacP M\u1eb6N T\u1ea0I HUY\u1ec6N NGH\u0128A H\u01afNG
\nT\u1ec8NH NAM \u0110\u1ecaNH<\/p>\n

<\/a>V\u0169 T\u1ea5n Ph\u01b0\u01a1ng1<\/sup> v\u00e0 Ph\u1ea1m Ng\u1ecdc Th\u00e0nh2<\/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 Sinh th\u00e1i v\u00e0 M\u00f4i tr\u01b0\u1eddng r\u1eebng<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

R\u1eebng ng\u1eadp m\u1eb7n, \u0111\u1eb7c bi\u1ec7t l\u00e0 r\u1eebng ng\u1eadp m\u1eb7n \u1edf v\u00f9ng nhi\u1ec7t \u0111\u1edbi v\u00e0 c\u1eadn nhi\u1ec7t \u0111\u1edbi, cung c\u1ea5p c\u00e1c d\u1ecbch v\u1ee5 h\u1ec7 sinh th\u00e1i quan tr\u1ecdng, bao g\u1ed3m g\u1ed7, c\u1ee7i, d\u01b0\u1ee3c li\u1ec7u, ngu\u1ed3n l\u1ee3i th\u1ee7y s\u1ea3n, b\u1ea3o v\u1ec7 b\u1edd bi\u1ec3n, v.v. Trong b\u1ed1i c\u1ea3nh bi\u1ebfn \u0111\u1ed5i kh\u00ed h\u1eadu, r\u1eebng ng\u1eadp m\u1eb7n \u0111\u01b0\u1ee3c coi l\u00e0 m\u1ed9t b\u1ec3 ch\u1ee9a carbon \u0111\u00e1ng k\u1ec3 v\u00e0 c\u00f3 t\u1ed1c \u0111\u1ed9 h\u1ea5p th\u1ee5 carbon cao, g\u00f3p ph\u1ea7n gi\u1ea3m nh\u1eb9 kh\u00ed nh\u00e0 k\u00ednh v\u00e0 l\u00e0m ch\u1eadm s\u1ef1 n\u00f3ng l\u00ean to\u00e0n c\u1ea7u. M\u1ed9t s\u1ed1 nghi\u00ean c\u1ee9u t\u1ea1i Vi\u1ec7t Nam \u0111\u00e3 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u0111\u1ec3 \u01b0\u1edbc t\u00ednh sinh kh\u1ed1i v\u00e0 tr\u1eef l\u01b0\u1ee3ng carbon c\u1ee7a r\u1eebng ng\u1eadp m\u1eb7n, tuy nhi\u00ean, vi\u1ec7c \u0111\u00e1nh gi\u00e1 tr\u1eef l\u01b0\u1ee3ng v\u00e0 ti\u1ec1m n\u0103ng h\u1ea5p th\u1ee5 carbon cho khu v\u1ef1c r\u1eebng ng\u1eadp m\u1eb7n c\u1ee5 th\u1ec3 c\u00f2n h\u1ea1n ch\u1ebf. Nghi\u00ean c\u1ee9u n\u00e0y \u0111\u00e1nh gi\u00e1 tr\u1eef l\u01b0\u1ee3ng carbon trong sinh kh\u1ed1i (tr\u00ean v\u00e0 d\u01b0\u1edbi m\u1eb7t \u0111\u1ea5t) v\u00e0 ti\u1ec1m n\u0103ng h\u1ea5p th\u1ee5 carbon c\u1ee7a r\u1eebng ng\u1eadp m\u1eb7n \u1edf huy\u1ec7n Ngh\u0129a H\u01b0ng t\u1ec9nh Nam \u0110\u1ecbnh. Th\u00f4ng tin vi\u1ec5n th\u00e1m (\u1ea3nh SPOT5 v\u00e0 6) \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 x\u00e2y d\u1ef1ng b\u1ea3n \u0111\u1ed3 hi\u1ec7n tr\u1ea1ng r\u1eebng. Tr\u1eef l\u01b0\u1ee3ng carbon trong sinh kh\u1ed1i v\u00e0 t\u1ed1c \u0111\u1ed9 h\u1ea5p th\u1ee5 carbon c\u1ee7a r\u1eebng ng\u1eadp m\u1eb7n \u0111\u01b0\u1ee3c ph\u00e2n t\u00edch t\u1eeb c\u00e1c nghi\u00ean c\u1ee9u s\u1eb5n c\u00f3, k\u1ebft h\u1ee3p t\u00ednh to\u00e1n b\u1ed5 sung d\u1ef1a tr\u00ean c\u00e1c ph\u01b0\u01a1ng tr\u00ecnh \u01b0\u1edbc t\u00ednh sinh kh\u1ed1i v\u00e0 s\u1ed1 li\u1ec7u \u0111o \u0111\u1ebfm c\u00e1c \u00f4 \u0111i\u1ec1u tra. K\u1ebft qu\u1ea3 cho th\u1ea5y t\u1ed5ng di\u1ec7n t\u00edch r\u1eebng ng\u1eadp m\u1eb7n \u1edf khu v\u1ef1c n\u00e0y l\u00e0 1.087,5 ha ph\u00e2n b\u1ed1 \u1edf v\u00f9ng c\u1eeda s\u00f4ng ven bi\u1ec3n thu\u1ed9c 8 x\u00e3 v\u00e0 th\u1ecb tr\u1ea5n. Tr\u1eef l\u01b0\u1ee3ng carbon c\u1ee7a r\u1eebng ng\u1eadp bi\u1ebfn \u0111\u1ed9ng kh\u00e1 l\u1edbn, t\u1eeb 6,3 \u0111\u1ebfn 91,2 t\u1ea5n C\/ha t\u00f9y thu\u1ed9c v\u00e0o lo\u00e0i c\u00e2y, tu\u1ed5i v\u00e0 m\u1eadt \u0111\u1ed9. T\u1ed5ng tr\u1eef l\u01b0\u1ee3ng carbon c\u1ee7a r\u1eebng ng\u1eadp m\u1eb7n \u1edf khu v\u1ef1c n\u00e0y l\u00e0 75.165 t\u1ea5n C (hay 275.606 t\u1ea5n CO2<\/sub>e) v\u00e0 l\u01b0\u1ee3ng carbon h\u1ea5p th\u1ee5 h\u00e0ng n\u0103m l\u00e0 13.823 t\u1ea5n CO2<\/sub>e.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Carbon, bi\u1ebfn \u0111\u1ed5i kh\u00ed h\u1eadu, h\u1ea5p th\u1ee5 carbon, sinh kh\u1ed1i, r\u1eebng ng\u1eadp m\u1eb7n<\/td>\n<\/tr>\n

\n

<\/a>Assessment of biomass carbon stock and sequestration of mangrove forests in Nghia Hung district, Nam Dinh province<\/strong><\/p>\n

Mangrove forests, in particular tropical and sub-tropical mangrove forests, provide a range of ecosystem services such as timbers, fuel woods, medicine, fisheries, coastal protection etc. In the context of climate change, mangroves are considered a significant carbon sink and high sequestration rate which contribute to reducing emissions and slowing down global warming. Several studies in Vietnam were carried out to estimate biomass and carbon stock of mangroves, however, the assessment of carbon storage and sequestration for specific area is limited. This paper provides assessment of above and below ground biomass carbon storage and sequestration potential for mangrove forests in Nghia Hung district of Nam Dinh province. Remote sensing informationwas used to develop forest cover map and biomass carbon stock and carbon increment rate were derived from literature review and supplemental estimates using developed allometric equations and plot measurement. Results show that mangroves cover an area of 1,087.5 ha and distribute in estuaries and coastal areas of 8 communes and town. The carbon stock of mangroves varies greatly, from 6.3 to 91.2 tons C per hectare depending on species, age and tree density. The estimated carbon stock of mangroves for this area is 75,165 tons C (or 275,606 tons CO2<\/sub>e) and annual sequestration amount is 13,823 tons CO2<\/sub>e.<\/p>\n

Keywords:<\/em><\/strong> Biomass, carbon, climate change, carbon sequestration, mangroves<\/p>\n

 <\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u0110\u1eb6C \u0110I\u1ec2M SINH H\u1eccC V\u00c0 DI\u1ec4N BI\u1ebeN M\u1eacT \u0110\u1ed8 QU\u1ea6N TH\u1ec2 C\u1ee6A LO\u00c0I CH\u00c2U CH\u1ea4U M\u00cdA CH\u00c0Y XANH
\n(Hieroglyphus tonkinensis <\/em>Bolivar) H\u1ea0I LU\u1ed2NG (Dendrocalamus barbatus<\/em>) T\u1ea0I PH\u00da TH\u1ecc<\/p>\n

<\/a>B\u00f9i Quang Ti\u1ebfp1<\/sup>, Tr\u1ea7n Thanh Tr\u0103ng1<\/sup>, L\u00ea H\u1ed3ng Thi\u1ebft2<\/sup>, Nguy\u1ec5n \u0110\u1ee9c Vinh3<\/sup>,
\nNguy\u1ec5n Ti\u1ebfn Hi\u1ebfu4<\/sup>, Ho\u00e0ng V\u0103n S\u00e1ng5<\/sup><\/p>\n

1<\/sup>Trung t\u00e2m Nghi\u00ean c\u1ee9u B\u1ea3o v\u1ec7 r\u1eebng,
\n2<\/sup>Chi c\u1ee5c Tr\u1ed3ng tr\u1ecdt v\u00e0 B\u1ea3o v\u1ec7 th\u1ef1c v\u1eadt Ph\u00fa Th\u1ecd
\n3<\/sup>Chi c\u1ee5c Ki\u1ec3m l\u00e2m Ph\u00fa Th\u1ecd,
\n4<\/sup>H\u1ea1t Ki\u1ec3m l\u00e2m Thanh S\u01a1n, 5<\/sup>H\u1ea1t Ki\u1ec3m l\u00e2m \u0110oan H\u00f9ng<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Lu\u1ed3ng \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh l\u00e0 lo\u00e0i c\u00e2y tr\u1ed3ng ch\u1ee7 l\u1ef1c trong ph\u00e1t tri\u1ec3n kinh t\u1ebf, x\u00e3 h\u1ed9i cho c\u1ed9ng \u0111\u1ed3ng ng\u01b0\u1eddi d\u00e2n \u1edf Ph\u00fa Th\u1ecd. Tr\u01b0\u1edbc s\u1ef1 bi\u1ebfn \u0111\u1ed5i kh\u00ed h\u1eadu c\u00f9ng v\u1edbi s\u1ef1 gia t\u0103ng di\u1ec7n t\u00edch tr\u1ed3ng r\u1eebng Lu\u1ed3ng d\u1eabn \u0111\u1ebfn s\u1ef1 b\u00f9ng ph\u00e1t c\u1ee7a m\u1ed9t s\u1ed1 lo\u00e0i sinh v\u1eadt g\u00e2y h\u1ea1i, trong \u0111\u00f3 lo\u00e0i Ch\u00e2u ch\u1ea5u m\u00eda ch\u00e0y xanh Hieroglyphus tonkinensis <\/em>\u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh l\u00e0 m\u1ed1i \u0111e d\u1ecda l\u1edbn nh\u1ea5t \u1edf Ph\u00fa Th\u1ecd t\u1eeb n\u0103m 2012 \u0111\u1ebfn nay. Nghi\u00ean c\u1ee9u v\u1ec1 \u0111\u1eb7c \u0111i\u1ec3m h\u00ecnh th\u00e1i, \u0111\u1eb7c \u0111i\u1ec3m sinh h\u1ecdc Ch\u00e2u ch\u1ea5u m\u00eda ch\u00e0y xanh \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n t\u1eeb th\u00e1ng 4 n\u0103m 2019 \u0111\u1ebfn th\u00e1ng 4 n\u0103m 2020 t\u1ea1i Trung t\u00e2m Nghi\u00ean c\u1ee9u B\u1ea3o v\u1ec7 r\u1eebng v\u00e0 Chi c\u1ee5c Tr\u1ed3ng tr\u1ecdt v\u00e0 B\u1ea3o v\u1ec7 th\u1ef1c v\u1eadt t\u1ec9nh Ph\u00fa Th\u1ecd. Khi nu\u00f4i \u1edf \u0111i\u1ec1u ki\u1ec7n nhi\u1ec7t \u0111\u1ed9 trung b\u00ecnh t= 27,6o<\/sup>C, \u0111\u1ed9 \u1ea9m trung b\u00ecnh RH= 79,8%, th\u1eddi gian ho\u00e0n th\u00e0nh v\u00f2ng \u0111\u1eddi c\u1ee7a Ch\u00e2u ch\u1ea5u m\u00eda ch\u00e0y xanh l\u00e0 327,5 ng\u00e0y, trong \u0111\u00f3 tr\u1ee9ng l\u00e0 241,36 ng\u00e0y, \u1ea5u tr\u00f9ng l\u00e0 54,88 ng\u00e0y, tr\u01b0\u1edfng th\u00e0nh l\u00e0 31,26 ng\u00e0y. \u0110i\u1ec1u tra \u0111\u00e1nh gi\u00e1 bi\u1ebfn \u0111\u1ed9ng m\u1eadt \u0111\u1ed9 qu\u1ea7n th\u1ec3 lo\u00e0i sinh v\u1eadt n\u00e0y \u1edf 3 huy\u1ec7n Thanh S\u01a1n, \u0110oan H\u00f9ng v\u00e0 Y\u00ean L\u1eadp t\u1eeb th\u00e1ng 4 \u0111\u1ebfn th\u00e1ng 12 n\u0103m 2019 cho th\u1ea5y th\u00e1ng 4 v\u00e0 th\u00e1ng 5 l\u00e0 th\u1eddi \u0111i\u1ec3m m\u1eadt \u0111\u1ed9 qu\u1ea7n th\u1ec3 \u1ea5u tr\u00f9ng Ch\u00e2u ch\u1ea5u m\u00eda ch\u00e0y xanh xu\u1ea5t hi\u1ec7n cao nh\u1ea5t trong n\u0103m. \u0110\u00e2y l\u00e0 c\u01a1 s\u1edf \u0111\u1ec3 \u00e1p d\u1ee5ng c\u00e1c bi\u1ec7n ph\u00e1p ph\u00f2ng ch\u1ed1ng \u0111\u1ed1i v\u1edbi lo\u00e0i Ch\u00e2u ch\u1ea5u m\u00eda ch\u00e0y xanh h\u1ea1i Lu\u1ed3ng \u1edf Ph\u00fa Th\u1ecd.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Ch\u00e2u ch\u1ea5u m\u00eda ch\u00e0y xanh, di\u1ec5n bi\u1ebfn m\u1eadt \u0111\u1ed9 qu\u1ea7n th\u1ec3, \u0111\u1eb7c \u0111i\u1ec3m sinh h\u1ecdc, Lu\u1ed3ng<\/td>\n<\/tr>\n

\n

<\/a>Biological characteristics and population density dynamics of locust Hieroglyphus tonkinensis <\/em>Bolivar damaging bamboo Dendrocalamus barbatus<\/em> in Phu Tho province<\/strong><\/p>\n

Bamboo Dendrocalamus barbatus<\/em> is confirmed a major plant for local communities in developing economy and society in Phu Tho province. Because of climate change and increasing areas of Dendrocalamus barbatus<\/em> have brought about breaking out some serious pests within the most threatening locust Hieroglyphus tonkinensis<\/em> between 2012 and at present in Phu Tho. Study on morphological and biological characteristics of H. tonkinensis<\/em> was carried out from April of 2019 to April 2020 in Forest Protection Research Centre and Phu Tho Department of Cultivation and Plant Protection. Obtained result show that life cycle of this species was completed in 327.5 days at 27.6o<\/sup>C and 79.8% relative humidity while egg, larva and adult are 241.26 days, 54.88 days and 31.26 days respectively. Surveillance of population density dynamics of the locust in three districts including Thanh Son, Doan Hung and Yen Lap showed that larva population density of this species reach a peak in April and May of the year 2019. This result is very useful for applying methods to control them damaging the bamboo in the province.<\/p>\n

Keywords:<\/em><\/strong> Hieroglyphus tonkinensis<\/em>, population density dynamics, biological characteristics, Dendrocalamus barbatus<\/em><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u1ea2NH H\u01af\u1edeNG C\u1ee6A \u0110I\u1ec0U KI\u1ec6N \u00c1NH S\u00c1NG \u0110\u1ebeN SINH TR\u01af\u1edeNG C\u1ee6A C\u00c2Y L\u00c1T HOA V\u00c0 M\u1ee8C \u0110\u1ed8 B\u1eca H\u1ea0I DO S\u00c2U \u0110\u1ee4C NG\u1eccN<\/strong><\/p>\n

<\/a>Nguy\u1ec5n Minh Ch\u00ed1, \u0110\u1ed7 Vi\u1ec7t H\u1ed3ng2, 3<\/sup>, Ph\u1ea1m Thu H\u00e03<\/sup>, Nguy\u1ec5n V\u0103n Th\u00e1i3<\/sup><\/p>\n

1<\/sup> Trung t\u00e2m Nghi\u00ean c\u1ee9u B\u1ea3o v\u1ec7 r\u1eebng, Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n2<\/sup> Ban qu\u1ea3n l\u00fd r\u1eebng ph\u00f2ng h\u1ed9 Si Ma Cai, L\u00e0o Cai
\n3<\/sup> Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc N\u00f4ng L\u00e2m, \u0110\u1ea1i h\u1ecdc Th\u00e1i Nguy\u00ean<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

C\u00e2y L\u00e1t hoa \u0111\u01b0\u1ee3c tr\u1ed3ng ph\u1ed5 bi\u1ebfn nh\u01b0ng ch\u00fang th\u01b0\u1eddng b\u1ecb S\u00e2u \u0111\u1ee5c ng\u1ecdn (Hypsipyla robusta<\/em>) t\u1ea5n c\u00f4ng khi tr\u1ed3ng r\u1eebng thu\u1ea7n lo\u00e0i, g\u00e2y \u1ea3nh h\u01b0\u1edfng nhi\u1ec1u \u0111\u1ebfn sinh tr\u01b0\u1edfng v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng h\u00ecnh th\u00e2n. Nghi\u00ean c\u1ee9u s\u1ef1 \u1ea3nh h\u01b0\u1edfng c\u1ee7a \u0111i\u1ec1u ki\u1ec7n \u00e1nh s\u00e1ng \u0111\u1ebfn m\u1ee9c \u0111\u1ed9 g\u00e2y h\u1ea1i c\u1ee7a S\u00e2u \u0111\u1ee5c ng\u1ecdn \u0111\u1ed1i v\u1edbi c\u00e2y L\u00e1t hoa t\u1ea1i t\u1ec9nh H\u00f2a B\u00ecnh v\u00e0 Ngh\u1ec7 An cho th\u1ea5y r\u1eebng tr\u1ed3ng L\u00e1t hoa \u1edf giai \u0111o\u1ea1n 2 n\u0103m tu\u1ed5i trong \u0111i\u1ec1u ki\u1ec7n che s\u00e1ng 10 \u0111\u1ebfn 30% sinh tr\u01b0\u1edfng t\u1ed1t c\u1ea3 v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh v\u00e0 chi\u1ec1u cao. \u0110\u1eb7c bi\u1ec7t, khi \u0111i\u1ec1u ki\u1ec7n che s\u00e1ng 20% c\u00e2y sinh tr\u01b0\u1edfng t\u1ed1t nh\u1ea5t (D1,3<\/sub> = 3,5 – 3,7 cm, Hvn<\/sub> = 3,6 – 4,1 m) v\u00e0 \u00edt b\u1ecb s\u00e2u \u0111\u1ee5c ng\u1ecdn. V\u1edbi \u0111i\u1ec1u ki\u1ec7n chi\u1ebfu s\u00e1ng 100% (che s\u00e1ng 0%), l\u00e1 c\u00e2y c\u00f3 h\u00e0m l\u01b0\u1ee3ng di\u1ec7p l\u1ee5c t\u1ed5ng s\u1ed1 v\u00e0 t\u1ef7 l\u1ec7 di\u1ec7p l\u1ee5c a\/b cao nh\u1ea5t, t\u01b0\u01a1ng \u1ee9ng l\u00e0 3,27 v\u00e0 3,61 mg\/gam. Ng\u01b0\u1ee3c l\u1ea1i, c\u00e2y \u0111\u01b0\u1ee3c che s\u00e1ng 50% l\u00e1 c\u00f3 h\u00e0m l\u01b0\u1ee3ng di\u1ec7p l\u1ee5c v\u00e0 t\u1ef7 l\u1ec7 di\u1ec7p l\u1ee5c a\/b th\u1ea5p nh\u1ea5t. H\u00e0m l\u01b0\u1ee3ng \u0111\u1ea1m t\u1ed5ng s\u1ed1 (N), l\u00e2n t\u1ed5ng s\u1ed1 (P2<\/sub>O5<\/sub>) v\u00e0 kali t\u1ed5ng s\u1ed1 (K2<\/sub>O) trong l\u00e1 \u0111\u1ea1t cao nh\u1ea5t khi che s\u00e1ng 10-30%. \u0110\u1ec3 ph\u00e1t tri\u1ec3n hi\u1ec7u qu\u1ea3 r\u1eebng tr\u1ed3ng L\u00e1t hoa, c\u00e1c ph\u01b0\u01a1ng th\u1ee9c tr\u1ed3ng c\u1ea7n \u0111\u01b0\u1ee3c t\u1eadp trung nghi\u00ean c\u1ee9u, \u0111\u1eb7c bi\u1ec7t l\u00e0 c\u00e1c gi\u1ea3i ph\u00e1p \u0111i\u1ec1u ti\u1ebft ch\u1ebf \u0111\u1ed9 \u00e1nh s\u00e1ng cho c\u00e2y \u1edf giai \u0111o\u1ea1n d\u01b0\u1edbi 3 n\u0103m tu\u1ed5i.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> \u00c1nh s\u00e1ng, c\u00e2y L\u00e1t hoa, s\u00e2u \u0111\u1ee5c ng\u1ecdn, di\u1ec7p l\u1ee5c<\/td>\n<\/tr>\n

\n

<\/a>Assessing the impacts of sunlight on plant growth and potential damage level by the shoot borers of Chukrasia tabularis<\/em><\/strong><\/p>\n

Chukrasia tabularis<\/em> has been popularly cultivated in home gardens and plantations in Vietnam, but it is susceptible with shoot borer (Hypsipyla robusta<\/em>), leading to inhibiting plant growth and reducing quality of the stem. This study focuses on examining the effect of sunlight on the shoot borers of C. tabularis<\/em> in Hoa Binh and Nghe An province, Vietnam. The observed findings showed that the two-year old C. tabularis<\/em> plantations was good growth (both in diameter and height) in the shaded conditions of exposure percentage with sunlight from 10 to 30%. Especially, trees planted in the 20% shaded conditions obtained the best growth (D1.3<\/sub> = 3.5-3.7cm,
\nHvn<\/sub> = 3.6-4.1m) and lowest level of damaged trees by shoot borers. Leaves of trees under 100% sunlight (0% shading) had the highest total chlorophyll concentration (3.27) as wel as proportion of a\/b (3.61). In contrast, 50% of shaded trees observed the lowest total chlorophyll content and lowest proportion of a\/b. The concentration of total nitrogen (N), total phosphorus (P2<\/sub>O5<\/sub>) and total potassium (K2<\/sub>O) was highest in leaves in shading conditions of 10-30%. The findings of this study suggest the necessary of technical solutions to prevent shoot borers which should focus on deploying right from planting to the age of 3 years to successfully develop the C. tabularis<\/em> plantations, especially regulating sunlight regimes for trees under 3 years old.<\/p>\n

Keywords:<\/em><\/strong> Sunlight, Chukrasia tabularis<\/em>, shoot borer, Hypsipyla<\/em> robusta<\/em>, chlorophyll<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U C\u00d4NG NGH\u1ec6 CH\u1ebe BI\u1ebeN G\u1ed6 X\u1eba V\u00c0 V\u00c1N L\u1ea0NG T\u1eea G\u1ed6 D\u1eba \u0110\u1ece (Lithocarpus ducampii<\/em> A. Camus)<\/p>\n

<\/a>B\u00f9i Duy Ng\u1ecdc1<\/sup>, Nguy\u1ec5n Th\u1ecb Ph\u01b0\u1ee3ng1<\/sup>, Nguy\u1ec5n \u0110\u1ee9c Th\u00e0nh1<\/sup>,
\nT\u1ea1 Th\u1ecb Thanh H\u01b0\u01a1ng1<\/sup>, \u0110\u00e0o H\u00f9ng M\u1ea1nh2<\/sup>, V\u00f5 \u0110\u1ea1i H\u1ea3i3<\/sup>, Nguy\u1ec5n B\u1ea3o Ng\u1ecdc1<\/sup><\/p>\n

1<\/sup> Vi\u1ec7n Nghi\u00ean c\u1ee9u C\u00f4ng nghi\u1ec7p r\u1eebng
\n\u00a02<\/sup> Trung t\u00e2m KHLN v\u00f9ng Trung t\u00e2m B\u1eafc B\u1ed9
\n3<\/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

D\u1ebb \u0111\u1ecf l\u00e0 lo\u00e0i c\u00e2y n\u1eb1m trong danh s\u00e1ch c\u00e1c lo\u00e0i c\u00e2y b\u1ea3n \u0111\u1ecba quan tr\u1ecdng trong tr\u1ed3ng ph\u1ee5c h\u1ed3i r\u1eebng t\u1ea1i Vi\u1ec7t Nam. Tuy nhi\u00ean, \u0111\u1ebfn nay v\u1eabn ch\u01b0a c\u00f3 nghi\u00ean c\u1ee9u c\u00f4ng ngh\u1ec7 ch\u1ebf bi\u1ebfn g\u1ed7 D\u1ebb \u0111\u1ecf \u0111\u1ec3 ph\u1ee5c v\u1ee5 cho nhu c\u1ea7u s\u1ea3n xu\u1ea5t g\u1ed7 x\u1ebb v\u00e0 v\u00e1n l\u1ea1ng hi\u1ec7n nay. Nh\u00f3m t\u00e1c gi\u1ea3 \u0111\u00e3 nghi\u00ean c\u1ee9u c\u00f4ng ngh\u1ec7 x\u1ebb, s\u1ea5y v\u00e0 l\u1ea1ng v\u00e1n t\u1eeb g\u1ed7 D\u1ebb \u0111\u1ecf. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y: Ch\u1ea5t l\u01b0\u1ee3ng g\u1ed7 D\u1ebb \u0111\u1ecf x\u1ebb theo ph\u01b0\u01a1ng ph\u00e1p x\u1ebb xoay t\u1ed1t h\u01a1n so v\u1edbi ph\u01b0\u01a1ng ph\u00e1p x\u1ebb su\u1ed1t. T\u1ef7 l\u1ec7 g\u1ed7 x\u1ebb \u0111\u1ea1t lo\u1ea1i A theo ph\u01b0\u01a1ng ph\u00e1p x\u1ebb xoay chi\u1ebfm tr\u00ean 40% trong khi \u0111\u00f3 \u0111\u1ed1i v\u1edbi ph\u01b0\u01a1ng ph\u00e1p x\u1ebb su\u1ed1t t\u1ef7 l\u1ec7 g\u1ed7 x\u1ebb \u0111\u1ea1t lo\u1ea1i A \u0111\u1ea1t \u0111\u01b0\u1ee3c t\u1eeb 26,18% \u0111\u1ebfn 35.18%. Ch\u1ebf \u0111\u1ed9 s\u1ea5y \u1edf nhi\u1ec7t \u0111\u1ed9 (50-70)o<\/sup>C trong th\u1eddi gian 245 gi\u1edd l\u00e0 th\u00edch h\u1ee3p nh\u1ea5t cho s\u1ea5y g\u1ed7 D\u1ebb \u0111\u1ecf. Ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 t\u1ef7 l\u1ec7 th\u00e0nh kh\u00ed c\u1ee7a v\u00e1n l\u1ea1ng g\u1ed7 D\u1ebb \u0111\u1ecf \u0111\u1ea1t t\u1ed1i \u01b0u khi x\u1eed l\u00fd th\u1ee7y nhi\u1ec7t \u1edf nhi\u1ec7t \u0111\u1ed9 80o<\/sup>C trong 48 gi\u1edd, chi\u1ec1u d\u00e0y v\u00e1n l\u1ea1ng l\u00e0 0,4 mm v\u00e0 s\u1ea5y v\u00e1n \u1edf nhi\u1ec7t \u0111\u1ed9 70o<\/sup>C v\u1edbi t\u1ed1c \u0111\u1ed9 s\u1ea5y l\u00e0 3 m\u00e9t\/ph\u00fat, \u0111\u1ed9 \u1ea9m c\u1ee7a v\u00e1n sau khi s\u1ea5y gi\u1ea3m xu\u1ed1ng d\u01b0\u1edbi 10%.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> D\u1ebb \u0111\u1ecf, g\u1ed7 x\u1ebb, ch\u1ebf \u0111\u1ed9 s\u1ea5y, v\u00e1n l\u1ea1ng<\/td>\n<\/tr>\n

\n

<\/a>Study on wood processing technology for Lithocarpus ducampii<\/em> A. Camus<\/strong><\/p>\n

Lithocarpus ducampii<\/em> A. Camus is listed as an important indigenous species for reforestation in Vietnam. However, the species have not been studied in the field of wood processing technology for the aim of sawn timber uses and sliced veneer production. This study investigated the wood processing of Lithocarpus ducampii<\/em> A. Camus at three aspects: (1) Evaluation of the logs and sawn timber; (2) Effects of different drying schedules on the quality of sawn timber; and (3) sliced veneer production. Results showed that the quality of sawn timbers produced by quarter sawing method was better than flat sawing method. The rate of
\nA-grade sawn timber (by quarter sawing) accounted for more than 40% while by flat sawing, A-grade sawn timber was between 26.18% and 35.18%. The drying schedule of 50-70o<\/sup>C for 245 hours was the most suitable for drying Lithocarpus ducampii<\/em> A. Camus timber. In relation to the sliced veneer production, the optimal quality and wood recovery of Lithocarpus ducampii<\/em> A. Camus veneers were achieved when the logs were preheated in the kiln at 80o<\/sup>C for 48 hours, then sliced with a thickness of 0.4mm and then dried to the final moisture content of 10% at 70o<\/sup>C at the speed of 3m\/min.<\/p>\n

Keywords:<\/em><\/strong> Lithocarpus ducampii<\/em> A. Camus, sawn timber, drying schedule, sliced veneer<\/p>\n

 <\/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 3 – 2020 \u00a0 1. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u b\u01b0\u1edbc \u0111\u1ea7u v\u1ec1 th\u1ea3m th\u1ef1c v\u1eadt v\u00e0 \u0111a d\u1ea1ng th\u1ef1c v\u1eadt\u00a0 t\u1ea1i Khu b\u1ea3o v\u1ec7 c\u1ea3nh quan Th\u00e1c Gi\u1ec1ng, t\u1ec9nh B\u1eafc K\u1ea1n Preliminary research results on vegetation status and plant diversity […]<\/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\/2180"}],"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=2180"}],"version-history":[{"count":3,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/2180\/revisions"}],"predecessor-version":[{"id":2398,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/2180\/revisions\/2398"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/media?parent=2180"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/categories?post=2180"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/tags?post=2180"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}