{"id":1744,"date":"2019-12-20T12:06:30","date_gmt":"2019-12-20T05:06:30","guid":{"rendered":"http:\/\/vafs.gov.vn\/en\/?p=1744"},"modified":"2023-11-23T12:25:29","modified_gmt":"2023-11-23T05:25:29","slug":"special-issue-number-2019-2","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/en\/2019\/12\/special-issue-number-2019-2\/","title":{"rendered":"Special Issue Number 2019 (2)"},"content":{"rendered":"

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

T\u1ea0P CH\u00cd KHOA H\u1eccC L\u00c2M NGHI\u1ec6P S\u1ed0 CHUY\u00caN \u0110\u1ec0<\/strong> – <\/strong>201<\/strong>9<\/strong><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
1.<\/td>\nTrung t\u00e2m Khoa h\u1ecdc L\u00e2m nghi\u1ec7p V\u00f9ng Trung t\u00e2m B\u1eafc B\u1ed9 60 n\u0103m x\u00e2y d\u1ef1ng v\u00e0 ph\u00e1t tri\u1ec3n (1959 – 2019)<\/td>\n<\/td>\nNguy\u1ec5n Anh D\u0169ng<\/td>\n3<\/td>\n<\/tr>\n
2.<\/td>\nK\u1ebft qu\u1ea3 28 n\u0103m x\u00e2y d\u1ef1ng v\u00e0 ph\u00e1t tri\u1ec3n V\u01b0\u1eddn S\u01b0u t\u1eadp Th\u1ef1c v\u1eadt C\u1ea7u Hai c\u1ee7a Trung t\u00e2m Khoa h\u1ecdc L\u00e2m nghi\u1ec7p V\u00f9ng Trung t\u00e2m B\u1eafc B\u1ed9<\/td>\nResult of 28 years of building and developing Cau Hai arboretum of Forest Science Centre for Central Northern Vietnam<\/td>\nNguy\u1ec5n V\u0103n Th\u1ecd<\/td>\n8<\/td>\n<\/tr>\n
3.<\/td>\nM\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m sinh v\u1eadt h\u1ecdc c\u1ee7a c\u00e2y Tre ng\u1ecdt (Dendrocalamus brandisii<\/em> (Munro) Kurz) t\u1ea1i m\u1ed9t s\u1ed1 t\u1ec9nh mi\u1ec1n n\u00fai ph\u00eda B\u1eafc<\/td>\nSeveral biological characteristics of Dendrocalamus brandisii<\/em> (Munro) Kurz from some provinces of mountainous region of Northern Vietnam<\/td>\nNguy\u1ec5n Vi\u1ec5n
\nNguy\u1ec5n V\u0103n Th\u1ecd
\nMa Thanh Thuy\u1ebft<\/td>\n		19<\/td>\n<\/tr>\n
4.<\/td>\n\u0110\u00e1nh gi\u00e1 \u0111a d\u1ea1ng di truy\u1ec1n qu\u1ea7n th\u1ec3 V\u00f9 h\u01b0\u01a1ng (Cinnamomum balansae<\/em> H.Lec) \u1edf m\u1ed9t s\u1ed1 t\u1ec9nh ph\u00eda B\u1eafc Vi\u1ec7t Nam b\u1eb1ng ch\u1ec9 th\u1ecb ph\u00e2n t\u1eed vi v\u1ec7 tinh (Microsatellite – SSR)<\/td>\nAssessing genetic diversity of the Cinnamomum balansae<\/em> H. Lec population in provinces Northern Vietnam using Microsatellite (SSR) markers<\/td>\nNguy\u1ec5n Vi\u1ec5n
\nPh\u1ea1m Mai Ph\u01b0\u01a1ng
\nB\u00f9i Th\u1ecb Tuy\u1ebft Xu\u00e2n Ho\u00e0ng Th\u1ecb Thu Trang
\nV\u0169 \u0110\u00ecnh Duy<\/td>\n		31<\/td>\n<\/tr>\n
5.<\/td>\nM\u1ed1i quan h\u1ec7 di truy\u1ec1n c\u1ee7a c\u00e1c lo\u00e0i thu\u1ed9c chi Lu\u1ed3ng (Dendrocalamus Nees) tr\u00ean c\u01a1 s\u1edf ph\u00e2n t\u00edch tr\u00ecnh t\u1ef1 nucleotide c\u00e1c v\u00f9ng Matk, Rbcl, Psba-Trnh (CPDNA) v\u00e0 ITS – RDNA<\/td>\nPhylogenetic relationship of bamboo species of Dendrocalamus Nees based on analysing rbcL, Matk, psbA-trnH, and its nucleotied regions<\/td>\nNguy\u1ec5n V\u0103n Th\u1ecd
\nNguy\u1ec5n Ho\u00e0ng Ngh\u0129a
\nL\u00ea Th\u1ecb Mai Linh<\/td>\n		44<\/td>\n<\/tr>\n
6.<\/td>\nK\u1ebft qu\u1ea3 kh\u1ea3o nghi\u1ec7m gi\u1ed1ng Thanh th\u1ea5t (Ailanthus triphysa<\/em> Alston) v\u00e0 \u0111\u1ecbnh h\u01b0\u1edbng s\u1eed d\u1ee5ng g\u1ed7 t\u1ea1i Ph\u00fa Th\u1ecd<\/td>\nThe result of Ailanthus triphysa<\/em> Alston breeding trial and orientation of wood using in Phu Tho<\/td>\nPh\u1ea1m Th\u1ebf D\u0169ng
\nPh\u1ea1m V\u0103n B\u1ed1n
\nNguy\u1ec5n Th\u1ecb \u00c1nh Nguy\u1ec7t<\/td>\n		57<\/td>\n<\/tr>\n
7.<\/td>\nK\u1ebft qu\u1ea3 kh\u1ea3o nghi\u1ec7m c\u00e1c xu\u1ea5t x\u1ee9 v\u00e0 gia \u0111\u00ecnh Lim xanh (Erythrophloeum fordi<\/em> Oliv) trong r\u1eebng b\u1ea3o t\u1ed3n ngu\u1ed3n gen t\u1ea1i C\u1ea7u Hai, Ph\u00fa Th\u1ecd<\/td>\nBreeding trail result of Erythrophloeum fordi<\/em> Oliv. provenances and families in genetic gene conservation stand established in Cau Hai, Phu Tho<\/td>\nNguy\u1ec5n V\u0103n Th\u1ecd
\nNguy\u1ec5n Th\u1ecb \u00c1nh Nguy\u1ec7t
\nNguy\u1ec5n Ho\u00e0ng Ngh\u0129a<\/td>\n		68<\/td>\n<\/tr>\n
8.<\/td>\n\u0110\u00e1nh gi\u00e1 c\u00e1c m\u00f4 h\u00ecnh v\u00e0 bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt tr\u1ed3ng r\u1eebng D\u1ebb \u0111\u1ecf (Lithocarpus ducampii <\/em>A. Camus) t\u1ea1i c\u00e1c t\u1ec9nh Ph\u00fa Th\u1ecd, H\u00f2a B\u00ecnh v\u00e0 Y\u00ean B\u00e1i<\/td>\nEvaluating plantation models and planting techniques of Lithocarpus ducampii<\/em> A. Camus at
\nPhu Tho, Hoa Binh and Yen Bai provinces<\/td>\n		\u0110\u00e0o H\u00f9ng M\u1ea1nh
\nV\u00f5 \u0110\u1ea1i H\u1ea3i
\nNguy\u1ec5n Anh D\u0169ng
\nNguy\u1ec5n Anh Duy
\nPh\u00f9ng H\u00e0 Anh<\/td>\n		81<\/td>\n<\/tr>\n
9.<\/td>\n\u0110\u00e1nh gi\u00e1 sinh tr\u01b0\u1edfng m\u00f4 h\u00ecnh r\u1eebng tr\u1ed3ng h\u1ed7n giao c\u00e2y l\u00e1 r\u1ed9ng b\u1ea3n \u0111\u1ecba cung c\u1ea5p g\u1ed7 l\u1edbn t\u1ea1i Y\u00ean B\u00e1i v\u00e0 Ph\u00fa Th\u1ecd<\/td>\nGrowth of mixed plantation models of native broad-leaved tree species for large size timber in Yen Bai and
\nPhu Tho province<\/td>\n		Nguy\u1ec5n Anh Duy
\nNguy\u1ec5n V\u0103n Th\u1ecd
\nNguy\u1ec5n Th\u1ecb Nhung
\nPh\u1ea1m Quang Thu\u1ef3
\nTr\u1ea7n Quang Tu\u1ea5n<\/td>\n		91<\/td>\n<\/tr>\n
10.<\/td>\n\u0110\u00e1nh gi\u00e1 sinh tr\u01b0\u1edfng c\u00e1c m\u00f4 h\u00ecnh r\u1eebng tr\u1ed3ng Re g\u1eebng (Cinnamomum burmannii<\/em> (Nees & T. Nees) Blume)
\nt\u1ea1i C\u1ea7u Hai, Ph\u00fa Th\u1ecd<\/td>\n		Evaluating growth of plantation models of Cinnamomum burmannii<\/em> (Nees & t. Nees) Blume
\nin Cau Hai, Phu Tho province<\/td>\n		Nguy\u1ec5n V\u0103n Th\u1ecd
\nNguy\u1ec5n Th\u1ecb \u00c1nh Nguy\u1ec7t<\/td>\n		106<\/td>\n<\/tr>\n
11.<\/td>\n\u0110\u00e1nh gi\u00e1 sinh tr\u01b0\u1edfng 25 lo\u00e0i c\u00e2y l\u00e1 r\u1ed9ng b\u1ea3n \u0111\u1ecba c\u1ee7a m\u00f4 h\u00ecnh tr\u1ed3ng h\u1ed7n giao t\u1ea1i Tr\u1ea1m Th\u1ef1c nghi\u1ec7m L\u00e2m sinh L\u01b0\u01a1ng Th\u1ecbnh, t\u1ec9nh Y\u00ean B\u00e1i<\/td>\nGrowth of 25 native broad-leaved tree species in mixed plantation in Luong Thinh silviculture experimental station, Yen Bai province<\/td>\nNguy\u1ec5n V\u0103n Th\u1ecd
\nNguy\u1ec5n Anh Duy
\nNguy\u1ec5n Ho\u00e0ng Ngh\u0129a<\/td>\n		116<\/td>\n<\/tr>\n
12.<\/td>\n\u0110\u00e1nh gi\u00e1 sinh tr\u01b0\u1edfng c\u00e1c m\u00f4 h\u00ecnh r\u1eebng tr\u1ed3ng Ch\u00f2 n\u00e2u (Dipterocarpus retusus<\/em> Blume) t\u1ea1i C\u1ea7u Hai,
\nt\u1ec9nh Ph\u00fa Th\u1ecd<\/td>\n		Evaluating growth of plantation models of Dipterocarpus retusus<\/em> Blume in Cau Hai, Phu Tho province<\/td>\nNguy\u1ec5n V\u0103n Th\u1ecd
\n\u0110\u00e0o H\u00f9ng M\u1ea1nh
\nPh\u1ea1m Quang Ti\u1ebfn D\u01b0\u01a1ng Th\u1ecb Minh Hu\u1ebf
\nNguy\u1ec5n Ho\u00e0ng Ngh\u0129a<\/td>\n		126<\/td>\n<\/tr>\n
13.<\/td>\nB\u01b0\u1edbc \u0111\u1ea7u ghi nh\u1eadn s\u00e2u \u0103n l\u00e1 v\u00e0 ng\u1ecdn non g\u00e2y h\u1ea1i r\u1eebng tr\u1ed3ng Thanh th\u1ea5t (Ailanthus triphysa<\/em>) t\u1ea1i t\u1ec9nh Ph\u00fa Th\u1ecd<\/td>\nFirst report on two catepillars damaging Ailanthus triphysa<\/em> plantation in Phu Tho province<\/td>\n\u0110\u00e0o Ng\u1ecdc Quang
\nPh\u1ea1m Quang Thu
\nNguy\u1ec5n Th\u1ecb \u00c1nh Nguy\u1ec7t
\nNguy\u1ec5n Minh Ch\u00ed<\/td>\n		135<\/td>\n<\/tr>\n
14.<\/td>\nC\u00f4ng ngh\u1ec7 \u00e9p nhi\u1ec7t t\u1ea1o v\u00e1n gh\u00e9p thanh t\u1eeb B\u01b0\u01a1ng l\u00f4ng \u0111i\u1ec7n bi\u00ean (Dendrocalamus dienbienensis<\/em> H.N Nguyen & V.T. Nguyen)<\/td>\nTechnology heat pressing plybamboo made from (Dendrocalamus dienbienensis<\/em> H.N Nguyen & V.T. Nguyen)<\/td>\nL\u00ea Th\u1ecb H\u01b0ng
\nB\u00f9i Duy Ng\u1ecdc
\nNguy\u1ec5n Anh D\u0169ng<\/td>\n		142<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

<\/a>K\u1ebeT QU\u1ea2 28 N\u0102M X\u00c2Y D\u1ef0NG V\u00c0 PH\u00c1T TRI\u1ec2N V\u01af\u1edcN S\u01afU T\u1eacP TH\u1ef0C V\u1eacT C\u1ea6U HAI C\u1ee6A TRUNG T\u00c2M KHOA H\u1eccC L\u00c2M NGHI\u1ec6P V\u00d9NG TRUNG T\u00c2M B\u1eaeC B\u1ed8<\/p>\n

<\/a>Nguy\u1ec5n V\u0103n Th\u1ecd<\/p>\n

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

V\u01b0\u1eddn s\u01b0u t\u1eadp th\u1ef1c v\u1eadt C\u1ea7u Hai \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng t\u1eeb n\u0103m 1991 c\u00f3 quy m\u00f4 38,6 ha v\u1edbi 378 lo\u00e0i thu\u1ed9c 210 chi c\u1ee7a 72 h\u1ecd trong 4 b\u1ed9 s\u01b0u t\u1eadp, g\u1ed3m 251 lo\u00e0i c\u00e2y g\u1ed7, 93 lo\u00e0i tre, 18 lo\u00e0i c\u00e2y thu\u1ed1c v\u00e0 17 lo\u00e0i thu\u1ed9c h\u1ecd Cau. B\u1ed9 s\u01b0u t\u1eadp c\u00e1c lo\u00e0i tre l\u00e0 b\u1ed9 s\u01b0u t\u1eadp tre \u0111\u1ea7u ti\u00ean c\u1ee7a Vi\u1ec7t Nam c\u00f3 93 lo\u00e0i thu\u1ed9c 16 chi tr\u00ean di\u1ec7n t\u00edch 3,5 ha. C\u00f3 33 lo\u00e0i th\u1ef1c v\u1eadt qu\u00fd hi\u1ebfm, \u0111ang b\u1ecb \u0111e d\u1ecda c\u1ee7a V\u01b0\u1eddn s\u01b0u t\u1eadp th\u1ef1c v\u1eadt C\u1ea7u Hai, trong \u0111\u00f3: 26 lo\u00e0i c\u00f3 trong S\u00e1ch \u0110\u1ecf Vi\u1ec7t Nam 2007, 31 lo\u00e0i c\u00f3 trong Danh l\u1ee5c \u0111\u1ecf Vi\u1ec7t Nam 2007, 13 lo\u00e0i thu\u1ed9c nh\u00f3m IIA – h\u1ea1n ch\u1ebf khai th\u00e1c, s\u1eed d\u1ee5ng theo Ngh\u1ecb \u0111\u1ecbnh s\u1ed1 06\/2019\/N\u0110-CP, 19 lo\u00e0i \u0111\u01b0\u1ee3c Li\u00ean minh B\u1ea3o t\u1ed3n Thi\u00ean nhi\u00ean Th\u1ebf gi\u1edbi \u0111\u00e1nh gi\u00e1 b\u1ecb \u0111e do\u1ea1. \u0110\u00e3 s\u01b0u t\u1eadp v\u00e0 l\u01b0u gi\u1eef \u0111\u01b0\u1ee3c 32 lo\u00e0i th\u1ef1c v\u1eadt \u0111\u1eb7c h\u1eefu c\u1ee7a Vi\u1ec7t Nam (3 lo\u00e0i c\u00e2y g\u1ed7, 29 lo\u00e0i tre), trong s\u1ed1 29 lo\u00e0i tre \u0111\u1eb7c h\u1eefu c\u00f3 15 lo\u00e0i m\u1edbi \u0111\u01b0\u1ee3c c\u00f4ng b\u1ed1 t\u1eeb n\u0103m 2010 \u0111\u1ebfn n\u0103m 2017 v\u00e0 13 lo\u00e0i ch\u01b0a c\u00f3 t\u00ean khoa h\u1ecdc, c\u00f3 th\u1ec3 l\u00e0 lo\u00e0i m\u1edbi.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> V\u01b0\u1eddn s\u01b0u t\u1eadp th\u1ef1c v\u1eadt, C\u1ea7u Hai, th\u1ef1c v\u1eadt \u0111\u1eb7c h\u1eefu, th\u1ef1c v\u1eadt qu\u00fd hi\u1ebfm, v\u01b0\u1eddn tre<\/td>\n<\/tr>\n

\n

<\/a>Result of 28 years of building and developing Cau Hai arboretum of Forest Science Centre for Central Northern Vietnam<\/strong><\/p>\n

Cau Hai arboretum, which was established in 1991, consists of 378 plant species of 210 genera belonging to 76 families in 4 collection of plant species group on an area of 38,6 hectares. The arboretum includes 251 tree species, 93 bamboo species, 18 medicinal plant species, and 17 species of Arecaceae. Bamoo garden of Cau Hai arboretum is first collection of bamboo species in Vietnam, and has 93 bamboo species belonging to 16 genera on a area of 3.5 hectares. There are 33 rare and endangered plant species of Cau Hai arboretum, including 26 the species in Vietnam red data book 2007, 31 the species in Vietnam red list 2007, 13 the species of IIA group in Decree 06\/2019\/ND-CP, 19 the species in IUCN Red List of Threatened Species. There are 32 endemic plant species of Vietnam, including 3 tree species and 29 bamboo species. 15 of 29 native bamboo species were published new species from 2010 to 2017, and 13 of the endemic bamboo species are unidentified latin name and can be new species.<\/p>\n

Keywords:<\/em><\/strong> Arboretum, Cau Hai, endemic plant, rare plant, bamboo garden<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>M\u1ed8T S\u1ed0 \u0110\u1eb6C \u0110I\u1ec2M SINH V\u1eacT H\u1eccC C\u1ee6A C\u00c2Y TRE NG\u1eccT (Dendrocalamus brandisii <\/em>(Munro) Kurz)<\/em> T\u1ea0I M\u1ed8T S\u1ed0 T\u1ec8NH MI\u1ec0N N\u00daI PH\u00cdA B\u1eaeC<\/p>\n

<\/a>Nguy\u1ec5n Vi\u1ec5n, Nguy\u1ec5n V\u0103n Th\u1ecd, Ma Thanh Thuy\u1ebft<\/p>\n

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

Tre ng\u1ecdt \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n v\u00e0 m\u00f4 t\u1ea3 l\u1ea7n \u0111\u1ea7u ti\u00ean \u1edf Vi\u1ec7t Nam b\u1edfi Camus (1913) nh\u01b0ng \u0111\u1ebfn nay ch\u01b0a c\u00f3 nghi\u00ean c\u1ee9u \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 \u0111\u1eb7c \u0111i\u1ec3m sinh v\u1eadt h\u1ecdc lo\u00e0i Tre ng\u1ecdt t\u1ea1i Vi\u1ec7t Nam \u0111\u01b0\u1ee3c c\u00f4ng b\u1ed1. K\u1ebft qu\u1ea3 \u0111i\u1ec1u tra ph\u00e2n b\u1ed1 th\u1ea5y 393 b\u1ee5i Tre ng\u1ecdt \u0111\u01b0\u1ee3c tr\u1ed3ng t\u1ea1i 4 t\u1ec9nh (\u0110i\u1ec7n Bi\u00ean, Lai Ch\u00e2u, L\u00e0o Cai v\u00e0 Ph\u00fa Th\u1ecd) nh\u01b0ng ch\u01b0a ph\u00e1t hi\u1ec7n th\u1ea5y Tre ng\u1ecdt m\u1ecdc t\u1ef1 nhi\u00ean. Bi\u00ean \u0111\u1ed9 sinh th\u00e1i c\u1ee7a Tre ng\u1ecdt kh\u00e1 r\u1ed9ng t\u1eeb \u0111\u1ed9 cao 50 m \u0111\u1ebfn 1.600 m. C\u00e2y Tre ng\u1ecdt c\u00f3 k\u00edch th\u01b0\u1edbc dao \u0111\u1ed9ng kh\u00e1 l\u1edbn \u1edf c\u00e1c \u0111i\u1ec1u ki\u1ec7n l\u1eadp \u0111\u1ecba t\u1eeb 6,8 – 12,3 cm \u0111\u01b0\u1eddng k\u00ednh, l\u1edbn nh\u1ea5t \u0111\u1ea1t 19,2 cm, chi\u1ec1u cao t\u1eeb 12,4 – 20,8 m, cao nh\u1ea5t \u0111\u1ea1t 26 m. M\u0103ng Tre ng\u1ecdt c\u00f3 qu\u00e1 tr\u00ecnh sinh tr\u01b0\u1edfng k\u00e9o d\u00e0i 245 ng\u00e0y, m\u00f9a m\u0103ng ch\u1ee7 y\u1ebfu t\u1eadp trung t\u1eeb th\u00e1ng 6 \u0111\u1ebfn th\u00e1ng 8 (chi\u1ebfm tr\u00ean 50% s\u1ed1 l\u01b0\u1ee3ng m\u0103ng c\u1ee7a c\u1ea3 n\u0103m). M\u1ed7i b\u1ee5i Tre ng\u1ecdt sinh ra t\u1eeb 14 – 19,8 m\u0103ng\/b\u1ee5i\/n\u0103m, c\u00e2y Tre ng\u1ecdt 1 tu\u1ed5i ra m\u0103ng nhi\u1ec1u nh\u1ea5t t\u1eeb 1,8 – 2,6 m\u0103ng\/c\u00e2y m\u1eb9. C\u00e0nh ch\u00ednh c\u1ee7a Tre ng\u1ecdt r\u1ea5t \u00edt (trung b\u00ecnh 1 c\u00e0nh\/c\u00e2y) v\u00e0 ph\u00e2n c\u00e0nh r\u1ea5t cao t\u1eeb \u0111\u1ed1t 18 – 21.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Tre ng\u1ecdt, ph\u00e2n b\u1ed1, sinh th\u00e1i, sinh tr\u01b0\u1edfng, quy lu\u1eadt sinh m\u0103ng<\/td>\n<\/tr>\n

\n

<\/a>Several biological characteristics of Dendrocalamus brandisii<\/em> (Munro) Kurz from some provinces of mountainous region of Northern Vietnam<\/strong><\/p>\n

Dendrocalamus brandisii <\/em>was found and decribed the first time in Vietnam by Camus (1993), but there is not a completely research of its biological characteristics in Vietnam. The species were planted in Dien Bien, Lai Chau, Lao Cai, and Phu Tho provinces, however its natural distribution has not been discovered. There are a total of 393 planted clumps of D.brandisii<\/em> in 4 Northern provinces (Dien Bien, Lai Chau, Lao Cai and Phu Tho province). Ecological amplitude of this species is quitely wide from 50 m to 1.600 m altitude. Culm size of the species majorly change between sites, from 6.8 to 12.3 cm in diameter, the biggest diameter reaches 19.2 cm, from 12.4 to 20.8 in height, the largest height is 26 m. Growth stages of bamboo shoot of the species are 245 days, main season of bamboo shoots is from June to August occuping more than 50% total of bamboo shoots per year. Each clump of the species can generate 14 – 19.8 bamboo shoots\/clump per year, one year old culm produces the most bamboo shoot from 1.8 to 2.6 bamboo shoots per culm. The dorminant branches of each culm are very few (only 1 branch per culm) and generated in high height from 18th <\/sup>to 21th <\/sup>node up.<\/p>\n

Keywords:<\/em><\/strong> Dendrocalamus brandisi, <\/em>distribution, ecology, growth, growth stages of bamboo shoot<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u0110\u00c1NH GI\u00c1 \u0110A D\u1ea0NG DI TRUY\u1ec0N QU\u1ea6N TH\u1ec2 V\u00d9 H\u01af\u01a0NG (Cinnamomum balansae <\/em>H.Lec) \u1ede M\u1ed8T S\u1ed0 T\u1ec8NH PH\u00cdA B\u1eaeC VI\u1ec6T NAM B\u1eb0NG CH\u1ec8 TH\u1eca PH\u00c2N T\u1eec VI V\u1ec6 TINH (MICROSATELLITE – SSR)<\/p>\n

<\/a>Nguy\u1ec5n Vi\u1ec5n1<\/sup>, Ph\u1ea1m Mai Ph\u01b0\u01a1ng2<\/sup>, B\u00f9i Th\u1ecb Tuy\u1ebft Xu\u00e2n3<\/sup>
\nHo\u00e0ng Th\u1ecb Thu Trang4<\/sup>, V\u0169 \u0110\u00ecnh Duy2*<\/sup><\/p>\n

1 <\/sup>Trung t\u00e2m Khoa h\u1ecdc L\u00e2m nghi\u1ec7p v\u00f9ng Trung t\u00e2m B\u1eafc B\u1ed9,
\n\u00a02<\/sup>Vi\u1ec7n Sinh th\u00e1i Nhi\u1ec7t \u0111\u1edbi, Trung t\u00e2m Nhi\u1ec7t \u0111\u1edbi Vi\u1ec7t – Nga
\n3 <\/sup>Vi\u1ec7n Sinh th\u00e1i v\u00e0 T\u00e0i nguy\u00ean Sinh v\u1eadt, Vi\u1ec7n H\u00e0n l\u00e2m Khoa h\u1ecdc v\u00e0 C\u00f4ng ngh\u1ec7 Vi\u1ec7t Nam,
\n4<\/sup>Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

V\u00f9 h\u01b0\u01a1ng\u00a0(Cinnamomum balansae<\/em>\u00a0H.Lec) l\u00e0 lo\u00e0i c\u00e2y g\u1ed7 l\u1edbn th\u01b0\u1eddng xanh, thu\u1ed9c h\u1ecd Long n\u00e3o (Lauraceae), l\u00e0 lo\u00e0i c\u00e2y \u0111\u1eb7c h\u1eefu qu\u00fd hi\u1ebfm c\u00f3 gi\u00e1 tr\u1ecb kinh t\u1ebf cao. Trong nghi\u00ean c\u1ee9u n\u00e0y, m\u1eabu l\u00e1 ho\u1eb7c v\u1ecf c\u00e2y thu th\u1eadp t\u1eeb 50 c\u00e2y tr\u1ed9i V\u00f9 h\u01b0\u01a1ng thu\u1ed9c 7 qu\u1ea7n th\u1ec3 (Ph\u00fa Th\u1ecd, Tuy\u00ean Quang, Y\u00ean B\u00e1i, S\u01a1n La, H\u00f2a B\u00ecnh, Thanh H\u00f3a v\u00e0 Ngh\u1ec7 An) \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 \u0111a d\u1ea1ng di truy\u1ec1n b\u1eb1ng ch\u1ec9 th\u1ecb ph\u00e2n t\u1eed vi v\u1ec7 tinh (microsatellite – SSR). Trong s\u1ed1 10 c\u1eb7p m\u1ed3i SSR d\u00f9ng \u0111\u1ec3 ph\u00e2n t\u00edch th\u00ec 10\/10 c\u1eb7p m\u1ed3i c\u00f3 t\u00ednh \u0111a h\u00ecnh cao v\u00e0 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c 28 alen. M\u1ee9c \u0111\u1ed9 \u0111a d\u1ea1ng di truy\u1ec1n \u1edf m\u1ee9c \u0111\u1ed9 qu\u1ea7n th\u1ec3 c\u1ee7a lo\u00e0i V\u00f9 h\u01b0\u01a1ng l\u00e0 kh\u00e1 cao (Na<\/em> = 2,354; Ne<\/em> = 2,107; I <\/em>= 0,489,
\nHe<\/em> = 0,244 v\u00e0 Ho<\/em> = 0,314). K\u1ebft qu\u1ea3 ph\u00e2n t\u00edch ph\u01b0\u01a1ng sai ph\u00e2n t\u1eed (AMOVA) gi\u1eefa c\u00e1c qu\u1ea7n th\u1ec3 r\u1ea5t th\u1ea5p (chi\u1ebfm 12,86%) v\u00e0 cao gi\u1eefa c\u00e1c c\u00e1 th\u1ec3 trong qu\u1ea7n th\u1ec3 (87,14%). T\u1ea5t c\u1ea3 7 qu\u1ea7n th\u1ec3 V\u00f9 h\u01b0\u01a1ng \u0111\u1ec1u c\u00f3 h\u1ec7 s\u1ed1 giao ph\u1ed1i c\u1eadn huy\u1ebft \u00e2m (Fis <\/em>< 0) cho th\u1ea5y hi\u1ec7n t\u01b0\u1ee3ng giao ph\u1ed1i c\u1eadn huy\u1ebft hay t\u1ef1 th\u1ee5 ph\u1ea5n kh\u00f4ng x\u1ea3y ra ho\u1eb7c x\u1ea3y ra r\u1ea5t th\u1ea5p. C\u00e2y quan h\u1ec7 di truy\u1ec1n gi\u1eefa c\u00e1c c\u00e1 th\u1ec3 chia l\u00e0m 2 nh\u00e1nh ch\u00ednh v\u00e0 c\u00f3 h\u1ec7 s\u1ed1 t\u01b0\u01a1ng \u0111\u1ed3ng di truy\u1ec1n dao \u0111\u1ed9ng trong kho\u1ea3ng t\u1eeb 60 \u0111\u1ebfn 99,8%. Nh\u00e1nh 1 g\u1ed3m c\u00e1c c\u00e1 th\u1ec3 c\u00f3 ngu\u1ed3n g\u1ed1c \u1edf 4 t\u1ec9nh Ngh\u1ec7 An, Thanh H\u00f3a, S\u01a1n La v\u00e0 H\u00f2a B\u00ecnh; nh\u00e1nh 2 g\u1ed3m c\u00e1c c\u00e1 th\u1ec3 c\u00f3 ngu\u1ed3n g\u1ed1c t\u1ea1i 3 t\u1ec9nh Ph\u00fa Th\u1ecd, Tuy\u00ean Quang v\u00e0 Y\u00ean B\u00e1i. M\u1ed9t s\u1ed1 gi\u1ea3i ph\u00e1p \u00e1p d\u1ee5ng cho c\u00f4ng t\u00e1c b\u1ea3o t\u1ed3n v\u00e0 ph\u00e1t tri\u1ec3n b\u1ec1n v\u1eefng c\u0169ng \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111\u1ec1 c\u1eadp.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> B\u1ea3o t\u1ed3n, \u0111\u1eb7c h\u1eefu, \u0111a d\u1ea1ng di truy\u1ec1n, SSR, V\u00f9 h\u01b0\u01a1ng<\/td>\n<\/tr>\n

\n

<\/a>Assessing genetic diversity of the Cinnamomum balansae <\/em>H. Lec population in provinces Northern Vietnam using Microsatellite (SSR) markers<\/strong><\/p>\n

Cinnamomum balansae <\/em>H. Lec (Lauraceae) is an evergreen, ecologically and economically important tree species globally. This species has been considered as an endemic to Vietnam and is assessed as endangered. The total leaves and\/or inner barks collected from 50 individuals of seven populations in seven province of Northern Vietnam (Phu Tho, Tuyen Quang, Yen Bai, Son La, Hoa Binh, Thanh Hoa and Nghe An), were used to assess genetic diversity using SSR markers. All of the ten loci showed polymorphic. A total of 28 alelles were observed in ten loci. Genetic diversity in population level was higher (Na<\/em> = 2.354; Ne<\/em> = 2.107; I <\/em>= 0.489, He<\/em> = 0.244 and Ho<\/em> = 0.314). Analysis of molecular variation showed that the level of low molecular changes between populations was (12.86%), and high among individuals in the population was observed by (87.14%). All seven populations were negative inbreeding coefficient (Fis < 0). The obtained results revealed that the deficiency of homozygotes and excess of heterozygote in all populations. Cluster analysis using unweighted pair group method with arithmetic average (UPGMA) with genetic similarity coefficients was ranged from 61 to 99.8%. Group I includes individuals origin in 4 provinces (Nghe An, Thanh Hoa, Son La and Hoa Binh) and group II includes individuals originating in 3 provinces (Phu Tho, Tuyen Quang and Yen Bai). A number of measures applied to the conservation and sustainable development were also discussed.<\/p>\n

Keywords:<\/em><\/strong> : <\/strong>Conservation, Cinnamomum balansae, <\/em>endemic, <\/em>genetic diversity, SSR.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>M\u1ed0I QUAN H\u1ec6 DI TRUY\u1ec0N C\u1ee6A C\u00c1C LO\u00c0I THU\u1ed8C CHI LU\u1ed2NG (Dendrocalamus <\/em>Nees)<\/em> TR\u00caN C\u01a0 S\u1ede PH\u00c2N T\u00cdCH TR\u00ccNH T\u1ef0 NUCLEOTIDE C\u00c1C V\u00d9NG MatK, rbcL, psbA-trnH (cpDNA) V\u00c0 ITS – rDNA<\/p>\n

<\/a>Nguy\u1ec5n V\u0103n Th\u1ecd1<\/sup>, Nguy\u1ec5n Ho\u00e0ng Ngh\u0129a2<\/sup>, L\u00ea Th\u1ecb Mai Linh3<\/sup><\/p>\n

1<\/sup>Trung t\u00e2m Khoa h\u1ecdc L\u00e2m nghi\u1ec7p v\u00f9ng Trung t\u00e2m B\u1eafc B\u1ed9, Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n2<\/sup>Vi\u1ec7n Qu\u1ea3n l\u00fd r\u1eebng b\u1ec1n v\u1eefng v\u00e0 Ch\u1ee9ng ch\u1ec9 r\u1eebng, H\u1ed9i Khoa h\u1ecdc K\u1ef9 thu\u1eadt L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n3<\/sup>Vi\u1ec7n Sinh th\u00e1i v\u00e0 T\u00e0i nguy\u00ean Sinh v\u1eadt, Vi\u1ec7n H\u00e0n l\u00e2m Khoa h\u1ecdc v\u00e0 C\u00f4ng ngh\u1ec7 Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

B\u1ed1n v\u00f9ng gen (m\u1ed9t v\u00f9ng gen nh\u00e2n ITS v\u00e0 3 v\u00f9ng gen l\u1ee5c l\u1ea1p MatK, rbcL, psbA-trnH) \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 h\u1ec7 th\u1ed1ng ph\u00e1t sinh c\u1ee7a 12 lo\u00e0i thu\u1ed9c chi lu\u1ed3ng. K\u1ebft qu\u1ea3 ph\u00e2n t\u00edch tr\u00ecnh t\u1ef1 nucleotide c\u1ee7a c\u00e1c v\u00f9ng gen c\u00f3 s\u1ef1 t\u01b0\u01a1ng \u0111\u1ed3ng t\u1eeb 98 – 100% \u1edf c\u00e1c v\u00f9ng gen MatK, rbcl, psbA-trnH, t\u1eeb 70 – 99% \u0111\u1ed1i v\u1edbi v\u00f9ng gen ITS. M\u1ed1i quan h\u1ec7 di truy\u1ec1n gi\u1eefa c\u00e1c lo\u00e0i nghi\u00ean c\u1ee9u kh\u00f3 ph\u00e2n t\u00e1ch khi ph\u00e2n t\u00edch tr\u00ecnh t\u1ef1 nucleotide c\u00e1c v\u00f9ng gen MatK, rbcL v\u00e0 psbA-trnH nh\u01b0ng 2 lo\u00e0i \u0111\u1eb7c tr\u01b0ng c\u1ee7a 2 ph\u00e2n chi (D. strictus <\/em>v\u00e0 D. latiflorus) <\/em>lu\u00f4n c\u00f3 s\u1ef1 ph\u00e2n t\u00e1ch r\u00f5 r\u00e0ng. Tr\u00ecnh t\u1ef1 nucleotide v\u00f9ng gen ITS c\u00f3 kh\u1ea3 n\u0103ng ph\u00e2n t\u00e1ch r\u00f5 r\u00e0ng c\u1ea3 v\u1ec1 lo\u00e0i v\u00e0 hai lo\u00e0i \u0111\u1eb7c tr\u01b0ng ph\u00e2n chi. K\u1ebft h\u1ee3p tr\u00ecnh t\u1ef1 nucleotide c\u1ee7a c\u1ea3 b\u1ed1n v\u00f9ng gen nghi\u00ean c\u1ee9u \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 m\u1ed1i quan h\u1ec7 di truy\u1ec1n, ph\u00e1t sinh ch\u1ee7ng lo\u1ea1i c\u1ee7a chi lu\u1ed3ng th\u1ea5y r\u1eb1ng: 12 lo\u00e0i thu\u1ed9c chi \u0111\u01b0\u1ee3c ph\u00e2n th\u00e0nh 2 nh\u00f3m l\u1edbn \u0111\u1ea1i di\u1ec7n cho 2 ph\u00e2n chi, c\u00e1c lo\u00e0i thu\u1ed9c nh\u00e1nh ph\u00e2n chi Dendrocalamus <\/em>l\u1ea1i ph\u00e2n th\u00e0nh 3 nh\u00f3m nh\u1ecf, \u0111\u1ea1i di\u1ec7n cho c\u00e1c nh\u00e1nh. Do \u0111\u00f3 c\u00e1c v\u00f9ng gen ITS, MatK, rbcL v\u00e0 psbA-trnH c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong ph\u00e2n t\u00edch ph\u00e1t sinh ch\u1ee7ng lo\u1ea1i c\u1ee7a c\u00e1c lo\u00e0i thu\u1ed9c chi lu\u1ed3ng.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> MatK, rbcL, psbA-trnH, ITS, chi lu\u1ed3ng, phylogenetics<\/td>\n<\/tr>\n

\n

<\/a>Phylogenetic relationship of bamboo species of Dendrocalamus<\/em> Nees based on analysing rbcL, Matk, psbA-trnH, and its nucleotied regions<\/strong><\/p>\n

Four nucleotide regions (a nuclear ribosomal DNA internal transcribed sequence (ITS) and three chloroplast DNA fragments (rbcL intron, MatK-barcode and psbA-trnH spacer) were used to assess phylogenetic relationships of 12 bamboo species of Dendrocalamus. <\/em>The result showed that genetic similarity coefficients of the species in three chloroplast DNA ranged from 98% to 100%, and from 70% to 99% in nuclear ribosomal DNA region (ITS) . Phylogenetics of the species only based on one of three chloroplast DNA regions were not clearly separated, but two type species of two subgenera (Dendrocalamus strictus <\/em>and Dendrocalamus latiflorus) <\/em>were always distinguished. The relationships of the species based on ITS spacer were obviously separated both species and two type species of two subgenera. Phylogenetics of the species based on combined analysis of four plastid DNA regions showed that twelve species were divided into two groups representing 2 subgenera (subgenus Dendrocalamus <\/em>and subgenus Sinocalamus), <\/em>and species of subgenus Dendrocalamus <\/em>were continously splited on three smaller group representing 3 sections. Therefore, it can be used to analyse phylogenetics of Dendrocalamus <\/em>species.<\/p>\n

Keywords:<\/em><\/strong> MatK, rbcL, psbA-trnH, ITS, Dendrocalamus<\/em>, phylogenetic<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>K\u1ebeT QU\u1ea2 KH\u1ea2O NGHI\u1ec6M GI\u1ed0NG THANH TH\u1ea4T (Ailanthus triphysa<\/em> Alston) V\u00c0 \u0110\u1ecaNH H\u01af\u1edaNG S\u1eec D\u1ee4NG G\u1ed6 T\u1ea0I PH\u00da TH\u1ecc<\/p>\n

<\/a>Ph\u1ea1m Th\u1ebf D\u0169ng1<\/sup>, Ph\u1ea1m V\u0103n B\u1ed1n2<\/sup>, Nguy\u1ec5n Th\u1ecb \u00c1nh Nguy\u1ec7t3<\/sup><\/p>\n

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

S\u1eed d\u1ee5ng c\u00e2y b\u1ea3n \u0111\u1ecba \u0111\u1ec3 ph\u00e1t tri\u1ec3n r\u1eebng tr\u1ed3ng cung c\u1ea5p g\u1ed7 l\u1edbn \u0111ang l\u00e0 h\u01b0\u1edbng ph\u00e1t tri\u1ec3n b\u1ec1n v\u1eefng trong vi\u1ec7c n\u00e2ng cao gi\u00e1 tr\u1ecb gia t\u0103ng c\u1ee7a s\u1ea3n xu\u1ea5t l\u00e2m nghi\u1ec7p. Vi\u1ec7c nghi\u00ean c\u1ee9u ch\u1ecdn gi\u1ed1ng v\u00e0 \u0111\u1ecbnh h\u01b0\u1edbng s\u1eed d\u1ee5ng g\u1ed7 c\u00e2y Thanh th\u1ea5t l\u00e0 m\u1ed9t trong nh\u1eefng n\u1ed9i dung nghi\u00ean c\u1ee9u c\u1ee7a \u0111\u1ec1 t\u00e0i c\u1ea5p B\u1ed9 \u0111\u01b0\u1ee3c Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam th\u1ef1c hi\u1ec7n t\u1eeb n\u0103m 2014 – 2018 t\u1ea1i mi\u1ec1n B\u1eafc, mi\u1ec1n Trung v\u00e0 \u0110\u00f4ng Nam B\u1ed9. M\u1ee5c ti\u00eau kh\u1ea3o nghi\u1ec7m gi\u1ed1ng t\u1ea1i Ph\u00fa Th\u1ecd l\u00e0: Ch\u1ecdn \u0111\u01b0\u1ee3c xu\u1ea5t x\u1ee9 v\u00e0 gia \u0111\u00ecnh Thanh th\u1ea5t c\u00f3 tri\u1ec3n v\u1ecdng \u0111\u1ec3 ph\u00e1t tri\u1ec3n r\u1eebng tr\u1ed3ng. Ph\u01b0\u01a1ng ph\u00e1p ch\u1ecdn c\u00e2y tr\u1ed9i v\u00e0 kh\u1ea3o nghi\u1ec7m gi\u1ed1ng \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n theo Quy ph\u1ea1m k\u1ef9 thu\u1eadt x\u00e2y d\u1ef1ng r\u1eebng gi\u1ed1ng v\u00e0 v\u01b0\u1eddn gi\u1ed1ng (QPN\/15 – 93) v\u00e0 Ti\u00eau chu\u1ea9n ng\u00e0nh 04 TCN-147-2006 c\u1ee7a B\u1ed9 N\u00f4ng nghi\u1ec7p v\u00e0 Ph\u00e1t tri\u1ec3n n\u00f4ng th\u00f4n. K\u1ebft qu\u1ea3 kh\u1ea3o nghi\u1ec7m cho th\u1ea5y: C\u00f3 t\u1edbi 12 gia \u0111\u00ecnh trong s\u1ed1 40 gia \u0111\u00ecnh c\u1ee7a 8 xu\u1ea5t x\u1ee9 c\u00f3 m\u1ee9c v\u01b0\u1ee3t th\u1ec3 t\u00edch th\u00e2n c\u00e2y h\u01a1n 10% so v\u1edbi trung b\u00ecnh c\u1ee7a 40 gia \u0111\u00ecnh tham gia trong kh\u1ea3o nghi\u1ec7m. Ngo\u00e0i ra, t\u0103ng tr\u01b0\u1edfng trung b\u00ecnh v\u1ec1 D1.3<\/sub> > 2 cm\/n\u0103m v\u00e0 chi\u1ec1u cao > 1 m\/n\u0103m l\u00e0 nh\u1eefng ch\u1ec9 s\u1ed1 kh\u00e1 t\u1ed1t \u0111\u1ed1i v\u1edbi lo\u00e0i c\u00e2y b\u1ea3n \u0111\u1ecba. C\u0103n c\u1ee9 c\u00e1c ch\u1ec9 ti\u00eau ch\u1ecdn gi\u1ed1ng th\u00ec tr\u1ed3ng r\u1eebng Thanh th\u1ea5t t\u1ea1i Ph\u00fa Th\u1ecd, c\u00f3 th\u1ec3 ch\u1ecdn 2 xu\u1ea5t x\u1ee9 g\u1ed3m Tuy\u00ean Quang (TQ) v\u00e0 B\u00ecnh Ph\u01b0\u1edbc (BP) v\u1edbi c\u00e1c gia \u0111\u00ecnh TQ1, TQ3, TQ6, BP22 v\u00e0 5 gia \u0111\u00ecnh c\u1ee7a c\u00e1c xu\u1ea5t x\u1ee9 kh\u00e1c g\u1ed3m VP1,VP2, QN24,QN29 v\u00e0 PY4. Nghi\u00ean c\u1ee9u c\u0169ng ch\u1ec9 ra r\u1eb1ng, s\u1eed d\u1ee5ng g\u1ed7 Thanh th\u1ea5t l\u00e0m l\u1edbp ph\u1ee7 b\u1ec1 m\u1eb7t s\u1ea3n ph\u1ea9m g\u1ed7 c\u0169ng nh\u01b0 \u0111\u1ed3 gia d\u1ee5ng cho s\u1ea3n ph\u1ea9m r\u1ea5t \u0111\u1eb9p v\u00e0 \u0111\u1ea3m b\u1ea3o c\u00e1c ch\u1ec9 s\u1ed1 k\u1ef9 thu\u1eadt.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> C\u00e2y tr\u1ed9i, gia \u0111\u00ecnh, kh\u1ea3o nghi\u1ec7m, xu\u1ea5t x\u1ee9<\/td>\n<\/tr>\n

\n

<\/a>The result of Ailanthus triphysa<\/em> Alston breeding trial and orientation of wood using in Phu Tho<\/strong><\/p>\n

The native species using for afforestation of big wood supply is solution toward sustained development of forest production. The study on breeding selection and wood using for added value increasing of Ailanthus<\/em> is one of subjects of Ministry\u2019s topic which was implemented by Vietnamese Academy of Forest Science from 2014 – 2018 in North, Center and Southeast regions. Objective of breeding trial in Phu Tho is to select a potential provinance and family of Ailanthus <\/em>for afforestation. The method of plus tree selection and breeding trial was carried out base on (QPN\/15 – 93) process and (TCN-147-2006) standard of MARD. The research results shows that: There are 12 among 40 families of 8 provinances in trial which have the tree\u2019s volume over 10% to compare with average index of all families in attendance. In addition, average growth increasing of D1.3<\/sub> > 2 cm\/year and high of tree > 1 m\/year is a good indicators for native tree species. Base on other request of breeding selection, the afforestation in Phu Tho should be to use 2 provinances Tuyen Quang (TQ) and Binh Phuoc (BQ) with families TQ1, TQ3, TQ6, BP22 and 5 families of other provinances including VP1,VP2, QN24, QN29 and PY4. The research also shows the use Ailanthus triphysa <\/em>wood as cover layer of wood product as well as furniture is a beauty and meeting techniques parameters.<\/p>\n

Keywords:<\/em><\/strong> Plus trees, family, trial, provinance<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>K\u1ebeT QU\u1ea2 KH\u1ea2O NGHI\u1ec6M C\u00c1C XU\u1ea4T X\u1ee8 V\u00c0 GIA \u0110\u00ccNH LIM XANH (Erythrophloeum fordi<\/em> OLIV) TRONG R\u1eeaNG B\u1ea2O T\u1ed2N NGU\u1ed2N GEN T\u1ea0I C\u1ea6U HAI, PH\u00da TH\u1ecc<\/p>\n

<\/a>Nguy\u1ec5n V\u0103n Th\u1ecd1<\/sup>, Nguy\u1ec5n Th\u1ecb \u00c1nh Nguy\u1ec7t, Nguy\u1ec5n Ho\u00e0ng Ngh\u0129a2<\/sup><\/p>\n

Trung t\u00e2m Khoa h\u1ecdc L\u00e2m nghi\u1ec7p v\u00f9ng Trung t\u00e2m B\u1eafc B\u1ed9
\n2<\/sup> H\u1ed9i Khoa h\u1ecdc K\u1ef9 thu\u1eadt L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Th\u00ed nghi\u1ec7m kh\u1ea3o nghi\u1ec7m 9 xu\u1ea5t x\u1ee9 v\u00e0 74 gia \u0111\u00ecnh Lim xanh thu\u1ed9c \u0111\u1ec1 t\u00e0i B\u1ea3o t\u1ed3n ngu\u1ed3n gen c\u00e2y r\u1eebng giai \u0111o\u1ea1n 1996 – 2000 \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh tr\u00ean di\u1ec7n t\u00edch 1,5 ha t\u1ea1i C\u1ea7u Hai, Ph\u00fa Th\u1ecd. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y: Kh\u00f4ng c\u00f3 sai kh\u00e1c c\u00f3 \u00fd ngh\u0129a v\u1ec1 sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh, chi\u1ec1u cao v\u00e0 n\u0103ng su\u1ea5t gi\u1eefa c\u00e1c xu\u1ea5t x\u1ee9 Lim xanh (Sig. > 0,05) nh\u01b0ng gi\u1eefa c\u00e1c gia \u0111\u00ecnh c\u00f3 s\u1ef1 sai kh\u00e1 r\u00f5 r\u00e0ng v\u1ec1 c\u00e1c ch\u1ec9 ti\u00eau n\u00e0y (Sig. < 0,05). C\u00f3 7 gia \u0111\u00ecnh \u0111\u1ea1t n\u0103ng su\u1ea5t tr\u00ean 110 m3<\/sup>\/ha, trong \u0111\u00f3 c\u00f3 6 gia \u0111\u00ecnh (BT5, BT6, QN5, HB3, QN3, TH2) c\u00f3 chi\u1ec1u cao d\u01b0\u1edbi c\u00e0nh \u0111\u1ea1t 5 m tr\u1edf l\u00ean. V\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng c\u00f3 11 gia \u0111\u00ecnh \u0111\u1ee9ng \u0111\u1ea7u v\u1ec1 \u0111\u1ed9 th\u1eb3ng th\u00e2n \u0111\u1ea1t tr\u00ean 4 \u0111i\u1ec3m, c\u00e2y kh\u00f4ng b\u1ecb s\u00e2u b\u1ec7nh v\u00e0 kh\u00f4ng c\u00f3 c\u00e2y c\u00f3 ch\u1ea5t l\u01b0\u1ee3ng x\u1ea5u. C\u00f3 4 gia \u0111\u00ecnh v\u1eeba c\u00f3 n\u0103ng su\u1ea5t cao v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng t\u1ed1t, \u0111\u00f3 l\u00e0 BT5, BT6, QN3, TH2, t\u1ed1t nh\u1ea5t l\u00e0 gia \u0111\u00ecnh BT5.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Lim xanh, sinh tr\u01b0\u1edfng, b\u1ea3o t\u1ed3n gen c\u00e2y r\u1eebng, C\u1ea7u Hai<\/td>\n<\/tr>\n

\n

<\/a>Breeding trail result of Erythrophloeum fordi <\/em>Oliv. Provenances and families in genetic gene conservation stand established in Cau Hai, Phu Tho<\/strong><\/p>\n

Breeding trail of 9 provenances and 74 families of Erythrophloeum fordi <\/em>Oliv. belonging to national subject of forest genetic gene conservation from 1996 to 2000 was implemented on 1,5 hectares in Cau Hai, Phu Tho. The research result shows that: Difference in growth of diameter, height, and volume between provenances was not significant (Sig. > 0.05), but the difference in the growth between families was significant (Sig. < 0.05). Volume of seven families reached over 110 m3<\/sup>\/ha, height of lowest branches of the six families, including BT5, BT6, QN5, HB3, QN3, TH2, were above 5 meters. In terms of quality, there are 11 families with 4 straight points, no pests and no bad trees. There are 4 families that have both high productivity and good quality, namely BT5, BT6, QN3, TH2, the best is BT5 family.<\/p>\n

Keywords:<\/em><\/strong> Erythrophloeum fordi<\/em>, growth, forest genetic gene conservation, Cau Hai<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u0110\u00c1NH GI\u00c1 C\u00c1C M\u00d4 H\u00ccNH V\u00c0 BI\u1ec6N PH\u00c1P K\u1ef8 THU\u1eacT TR\u1ed2NG R\u1eeaNG D\u1eba \u0110\u1ece (Lithocarpus ducampii<\/em> A. Camus) T\u1ea0I C\u00c1C T\u1ec8NH PH\u00da TH\u1ecc, H\u00d2A B\u00ccNH V\u00c0 Y\u00caN B\u00c1I<\/p>\n

<\/a>\u0110\u00e0o H\u00f9ng M\u1ea1nh1<\/sup>, V\u00f5 \u0110\u1ea1i H\u1ea3i2<\/sup>, Nguy\u1ec5n Anh D\u0169ng1<\/sup>, Nguy\u1ec5n Anh Duy1<\/sup>, Ph\u00f9ng H\u00e0 Anh1<\/sup><\/p>\n

Trung t\u00e2m Khoa h\u1ecdc L\u00e2m nghi\u1ec7p v\u00f9ng Trung t\u00e2m B\u1eafc B\u1ed9,
\n2<\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Nghi\u00ean c\u1ee9u \u0111\u00e1nh gi\u00e1 c\u00e1c m\u00f4 h\u00ecnh v\u00e0 bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt tr\u1ed3ng r\u1eebng D\u1ebb \u0111\u1ecf \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n t\u1ea1i 3 t\u1ec9nh Ph\u00fa Th\u1ecd, H\u00f2a B\u00ecnh,Y\u00ean B\u00e1i. K\u1ebft qu\u1ea3 \u0111\u00e1nh gi\u00e1 sinh tr\u01b0\u1edfng D\u1ebb \u0111\u1ecf t\u1ea1i Ph\u00fa Th\u1ecd l\u00e0 lo\u00e0i chi\u1ebfm \u01b0u th\u1ebf v\u1edbi \u0111\u01b0\u1eddng k\u00ednh th\u00e2n c\u00e2y \u0111\u1ea1t t\u1eeb 14,7 – 23,1 cm, chi\u1ec1u cao v\u00fat ng\u1ecdn t\u1eeb 5,6 – 19,2 m, chi\u1ec1u cao d\u01b0\u1edbi c\u00e0nh t\u1eeb 2,1 – 9 m, \u0111\u01b0\u1eddng k\u00ednh t\u00e1n r\u1ed9ng t\u1eeb 3,1 – 6,6 m. Ch\u1ea5t l\u01b0\u1ee3ng c\u00e2y t\u1ed1t chi\u1ebfm t\u1ef7 l\u1ec7 t\u1eeb 57,7 – 84,0%. Nghi\u00ean c\u1ee9u \u1edf t\u1ec9nh Y\u00ean B\u00e1i, D\u1ebb \u0111\u1ecf sinh tr\u01b0\u1edfng v\u1edbi \u0111\u01b0\u1eddng k\u00ednh th\u00e2n c\u00e2y \u0111\u1ea1t t\u1eeb 12,4 – 14,9 cm, chi\u1ec1u cao v\u00fat ng\u1ecdn t\u1eeb 12,5 – 13,0 m, chi\u1ec1u cao d\u01b0\u1edbi c\u00e0nh t\u1eeb 5,3 – 6,7 m, \u0111\u01b0\u1eddng k\u00ednh t\u00e1n r\u1ed9ng t\u1eeb 3,2 – 3,6 m. Ch\u1ea5t l\u01b0\u1ee3ng c\u00e2y t\u1ed1t chi\u1ebfm t\u1ef7 l\u1ec7 t\u1eeb 45,6 – 57,4%. \u1ede t\u1ec9nh H\u00f2a B\u00ecnh, D\u1ebb \u0111\u1ecf l\u00e0 lo\u00e0i chi\u1ebfm \u01b0u th\u1ebf v\u1edbi \u0111\u01b0\u1eddng k\u00ednh th\u00e2n c\u00e2y \u0111\u1ea1t t\u1eeb 16,4 – 17,4 cm, chi\u1ec1u cao v\u00fat ng\u1ecdn t\u1eeb 14,3 – 15,6 m, chi\u1ec1u cao d\u01b0\u1edbi c\u00e0nh t\u1eeb 6 – 7,5 m, \u0111\u01b0\u1eddng k\u00ednh t\u00e1n r\u1ed9ng t\u1eeb 5 – 5,5 m. Ch\u1ea5t l\u01b0\u1ee3ng c\u00e2y t\u1ed1t chi\u1ebfm t\u1ef7 l\u1ec7 trung b\u00ecnh t\u1eeb 57,4 – 63,8%. T\u0103ng tr\u01b0\u1edfng b\u00ecnh qu\u00e2n n\u0103m c\u1ee7a D\u1ebb \u0111\u1ecf \u1edf 3 t\u1ec9nh Ph\u00fa Th\u1ecd, H\u00f2a B\u00ecnh, Y\u00ean B\u00e1i \u0111\u1ec1u thu\u1ed9c nh\u00f3m c\u00e2y b\u1ea3n \u0111\u1ecba sinh tr\u01b0\u1edfng nhanh, c\u00f3 t\u1ed1c \u0111\u1ed9 t\u0103ng tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh tr\u00ean 0,8 cm\/n\u0103m, trong \u0111\u00f3 t\u0103ng tr\u01b0\u1edfng b\u00ecnh qu\u00e2n D\u1ebb \u0111\u1ecf t\u1ea1i H\u00f2a B\u00ecnh l\u1edbn nh\u1ea5t \u0111\u1ea1t \u2206D1.3<\/sub> = 1,1 cm, nh\u1ecf nh\u1ea5t t\u1ea1i Ph\u00fa Th\u1ecd \u0111\u1ea1t \u2206D1.3<\/sub> = 0,95 cm\/n\u0103m.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> D\u1ebb \u0111\u1ecf, sinh tr\u01b0\u1edfng, Ph\u00fa Th\u1ecd, H\u00f2a B\u00ecnh, Y\u00ean B\u00e1i, c\u00e2y b\u1ea3n \u0111\u1ecba<\/td>\n<\/tr>\n

\n

<\/a>Evaluating plantation models and planting techniques of Lithocarpus<\/em> ducampii<\/em> A. Camus at Phu Tho, Hoa Binh and Yen Bai provinces<\/strong><\/p>\n

Study on evaluating plantation models and planting techniques of Lithocarpus ducampii <\/em>A. Camus was conducted at Phu Tho, Hoa Binh and Yen Bai provinces. The result of evaluating the growth of Lithocarpus ducampii <\/em>in Phu Tho is the dominant species with 14.7 – 23.1 cm in diameter, 5.6 – 19.2 m in height, 2.1 – 9 m in under crown height, 3.1 – 6.6 m in crown diameter. The good quality trees have high percentage from 68.8% to 84%. Research result in Yen Bai province shows that Lithocarpus ducampii <\/em>have grown with 12.4 – 14.9 cm in diameter, 12.5 – 13 m in height, 5.3 – 6.7 m in under crown height, 3.2 – 3.6 m in crown diameter. The good quality trees have high percentage from 45.6% to 54.7%. In Hoa Binh province, Lithocarpus ducampii <\/em>is the dominant species with 16.4 – 17.4 cm in diameter, 14.3 – 15.6 m in height, 6 – 7.5 m in under crown height, 5 – 5.5 m in crown diameter. The good quality trees have high percentage from 54.7 to 63.8%. The annual average growths of Lithocarpus ducampii <\/em>in 3 provinces of Phu Tho, Yen Bai, Hoa Binh are among the fast growing native species group with a diameter growth rate of over 0.8 cm\/year of which the fasted average annual growth is in Hoa Binh is \u2206D1.3<\/sub> = 1.1 cm, the lowest is in Phu Tho is \u2206D1.3<\/sub> = 0.95 cm\/year.<\/p>\n

Keywords:<\/em><\/strong> Lithrocarpus ducampii<\/em>, growth, Phu Tho, Hoa Binh, Yen Bai, native species<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u0110\u00c1NH GI\u00c1 SINH TR\u01af\u1edeNG M\u00d4 H\u00ccNH R\u1eeaNG TR\u1ed2NG H\u1ed6N GIAO C\u00c2Y L\u00c1 R\u1ed8NG B\u1ea2N \u0110\u1ecaA CUNG C\u1ea4P G\u1ed6 L\u1edaN T\u1ea0I Y\u00caN B\u00c1I V\u00c0 PH\u00da TH\u1ecc<\/p>\n

<\/a>Nguy\u1ec5n Anh Duy, Nguy\u1ec5n V\u0103n Th\u1ecd,
\nNguy\u1ec5n Th\u1ecb Nhung, Ph\u1ea1m Quang Thu\u1ef3, Tr\u1ea7n Quang Tu\u1ea5n<\/p>\n

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

K\u1ebft qu\u1ea3 \u0111\u00e1nh gi\u00e1 m\u00f4 h\u00ecnh r\u1eebng tr\u1ed3ng h\u1ed7n giao c\u00e2y l\u00e1 r\u1ed9ng b\u1ea3n \u0111\u1ecba cung c\u1ea5p g\u1ed7 l\u1edbn 13 tu\u1ed5i t\u1ea1i v\u00f9ng Trung t\u00e2m B\u1eafc B\u1ed9 cho th\u1ea5y, t\u1ef7 l\u1ec7 s\u1ed1ng c\u1ee7a c\u00e1c m\u00f4 h\u00ecnh h\u1ed7n giao c\u00e2y l\u00e1 r\u1ed9ng kh\u00e1 th\u1ea5p, \u0111\u1ea1t t\u1eeb 48,1 – 66,4%, tr\u1eef l\u01b0\u1ee3ng t\u1eeb 58,95 – 108,70 m3<\/sup>\/ha (t\u0103ng tr\u01b0\u1edfng 4,53 – 8,36 m3<\/sup>\/ha\/n\u0103m) \u1edf Y\u00ean B\u00e1i v\u00e0 t\u1eeb 95,22 – 139,43 m3<\/sup>\/ha (t\u0103ng tr\u01b0\u1edfng 7,32 – 10,42 m3<\/sup>\/ha\/n\u0103m) \u1edf Ph\u00fa Th\u1ecd. C\u00e1c m\u00f4 h\u00ecnh h\u1ed7n giao \u1edf Ph\u00fa Th\u1ecd \u0111\u1ed3ng \u0111\u1ec1u v\u00e0 t\u1ed1t h\u01a1n \u1edf Y\u00ean B\u00e1i, m\u00f4 h\u00ecnh h\u1ed7n giao 5 lo\u00e0i (D\u1ebb \u0111\u1ecf, S\u1ed3i ph\u1ea3ng, Re g\u1eebng, Xoan \u0111\u00e0o, Kh\u00e1o v\u00e0ng) theo h\u00e0ng (MH3) c\u00f3 tr\u1eef l\u01b0\u1ee3ng cao nh\u1ea5t (108,70 m3<\/sup>\/ha) \u1edf Y\u00ean B\u00e1i v\u00e0 m\u00f4 h\u00ecnh h\u1ed7n giao 4 lo\u00e0i (D\u1ebb \u0111\u1ecf, S\u1ed3i ph\u1ea3ng, Re g\u1eebng, Xoan \u0111\u00e0o) theo d\u1ea3i (MH5) \u0111\u1ea1t tr\u1eef l\u01b0\u1ee3ng cao nh\u1ea5t \u1edf Ph\u00fa Th\u1ecd (tr\u1eef l\u01b0\u1ee3ng 139,43 m3<\/sup>\/ha, t\u0103ng tr\u01b0\u1edfng 10,72 m3<\/sup>\/ha\/n\u0103m). Lo\u00e0i S\u1ed3i ph\u1ea3ng v\u00e0 D\u1ebb \u0111\u1ecf sinh tr\u01b0\u1edfng t\u1ed1t nh\u1ea5t \u1edf m\u00f4 h\u00ecnh h\u1ed7n giao 5 lo\u00e0i theo h\u00e0ng v\u00e0 c\u00e1c lo\u00e0i Xoan \u0111\u00e0o, Re g\u1eebng v\u00e0 Kh\u00e1o v\u00e0ng sinh tr\u01b0\u1edfng t\u1ed1t nh\u1ea5t \u1edf m\u00f4 h\u00ecnh h\u1ed7n giao 3 lo\u00e0i theo h\u00e0ng. Trong m\u00f4 h\u00ecnh 3 lo\u00e0i v\u00e0 5 lo\u00e0i theo h\u00e0ng, Re g\u1eebng l\u00e0 lo\u00e0i c\u00f3 ch\u1ea5t l\u01b0\u1ee3ng th\u00e2n c\u00e2y k\u00e9m nh\u1ea5t (t\u1ed5ng \u0111i\u1ec3m < 10 \u0111i\u1ec3m). C\u00f3 5 m\u00f4 h\u00ecnh c\u00f3 ch\u1ea5t l\u01b0\u1ee3ng c\u00e2y tr\u1ed3ng t\u1ed1t v\u1edbi t\u1ed5ng \u0111i\u1ec3m tr\u00ean 10 \u0111i\u1ec3m (MH1, MH2, MH4, MH5 \u1edf Y\u00ean B\u00e1i v\u00e0 MH5 \u1edf Ph\u00fa Th\u1ecd). B\u1ed1n lo\u00e0i Xoan \u0111\u00e0o, Kh\u00e1o v\u00e0ng, D\u1ebb \u0111\u1ecf v\u00e0 S\u1ed3i ph\u1ea3ng c\u00f3 ch\u1ea5t l\u01b0\u1ee3ng c\u00e2y tr\u1ed3ng t\u1ed1t (t\u1ed5ng \u0111i\u1ec3m > 10,5 \u0111i\u1ec3m \u1edf h\u1ea7u h\u1ebft c\u00e1c m\u00f4 h\u00ecnh) v\u00e0 k\u00e9m nh\u1ea5t lo\u00e0i Re g\u1eebng. C\u00e1c c\u00f4ng th\u1ee9c h\u1ed7n giao c\u00e2y l\u00e1 r\u1ed9ng b\u1ea3n \u0111\u1ecba hi\u1ec7n ch\u01b0a ph\u00e1t hi\u1ec7n b\u1ec7nh, c\u00f3 t\u1ef7 l\u1ec7 c\u00e2y tr\u1ed3ng b\u1ecb s\u00e2u \u0103n l\u00e1 g\u00e2y h\u1ea1i t\u1eeb 1,6 – 11,3%.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> C\u00e2y l\u00e1 r\u1ed9ng b\u1ea3n \u0111\u1ecba, g\u1ed7 l\u1edbn, Ph\u00fa Th\u1ecd, r\u1eebng tr\u1ed3ng h\u1ed7n giao, Y\u00ean B\u00e1i<\/td>\n<\/tr>\n

\n

<\/a>Growth of mixed plantation models of native broad-leaved tree species for large size timber in Yen Bai and Phu Tho province<\/strong><\/p>\n

The results of evaluating of mixed plantation models of native broad-leaved tree species for timber at 13 year in Central Northern region of Vietnam show that, survival rate of the plantation forests is fairly low from 48,1 to 66.4%. Volume of the forest is from 58.95 to 108.70 m3<\/sup>\/ha (increment of the forest from 4.53 – 8.36 m3<\/sup>\/ha\/year) in Yen Bai and from 95.22 to 139.43 m3<\/sup>\/ha (increment of the forest from 7.32 to 10.42 m3<\/sup>\/ha\/year) in Phu Tho. Models of planting mixed species in Phu Tho province are equaller and better than the experiments in Yen Bai province. Model of mixed five species (Lithocarpus ducampii, Cinamomum burmanica, Castanopis cerebrina, <\/em>Prunus arborea<\/em>, <\/em>Machilus bonii<\/em>) by rows (Model MH3) has highest volume of the forest in the Models (108.70 m3<\/sup>\/ha) in Yen Bai, and experiment of mixed four species (Lithocarpus ducampii, Cinamomum burmanica, Castanopis cerebrina, <\/em>Prunus arborea) <\/em>by bands (Model MH5) reaches largest the volume (139.43 m3<\/sup>\/ha, increment of the forest is 10.72 m3<\/sup>\/ha\/year) in Phu Tho. Growth of Lithocarpus ducampii <\/em>and Castanopis cerebrina <\/em>are best in model of mixed five species by rows, and growth of Cinamomum burmanica, <\/em>Prunus arborea<\/em> and Machilus bonii <\/em>are fastest in model of mixed three species by rows. Five models, including MH1, MH2, MH4, MH5 models in Yen Bai province, and MH5 model in Phu Tho province, had good quality of stem with above 10 total scores. Stem qualify of Lithocarpus ducampii, <\/em>Prunus arborea<\/em> and Machilus bonii <\/em>are good because their total scores of the qualify are greater than 10.5 points. Stem qualify of Cinamomum burmanica <\/em>is worst because its total scores in the models are lower than 10 points. The models do not show disease, but the species of the models were eaten by leafworms from 1.6 to 11.3 percents.<\/p>\n

Keywords:<\/em><\/strong> Large size timber, mixed plantation, native broad-leaved tree species, Phu Tho, Yen Bai province<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u0110\u00c1NH GI\u00c1 SINH TR\u01af\u1edeNG C\u00c1C M\u00d4 H\u00ccNH R\u1eeaNG TR\u1ed2NG RE G\u1eeaNG (Cinnamomum burmannii <\/em>(Nees & T. Nees) Blume)
\nT\u1ea0I C\u1ea6U HAI, PH\u00da TH\u1ecc<\/p>\n

<\/a>Nguy\u1ec5n V\u0103n Th\u1ecd, Nguy\u1ec5n Th\u1ecb \u00c1nh Nguy\u1ec7t<\/p>\n

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

Re g\u1eebng l\u00e0 c\u00e2y g\u1ed7 l\u1edbn l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh c\u00f3 bi\u00ean \u0111\u1ed9 sinh th\u00e1i r\u1ed9ng, g\u1ed7 m\u00e0u tr\u1eafng x\u00e1m, th\u1edb m\u1ecbn \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 trong x\u00e2y d\u1ef1ng v\u00e0 \u0111\u00f3ng \u0111\u1ed3. Lo\u00e0i c\u00e2y n\u00e0y \u0111\u00e3 \u0111\u01b0\u1ee3c g\u00e2y tr\u1ed3ng \u1edf m\u1ed9t s\u1ed1 t\u1ec9nh mi\u1ec1n n\u00fai ph\u00eda B\u1eafc b\u01b0\u1edbc \u0111\u1ea7u c\u00f3 tri\u1ec3n v\u1ecdng. K\u1ebft qu\u1ea3 \u0111\u00e1nh gi\u00e1 12 m\u00f4 h\u00ecnh tr\u1ed3ng Re g\u1eebng t\u1eeb 12 \u0111\u1ebfn 25 tu\u1ed5i \u1edf C\u1ea7u Hai cho th\u1ea5y, Re g\u1eebng l\u00e0 lo\u00e0i c\u00e2y sinh tr\u01b0\u1edfng kh\u00e1 ch\u1eadm, \u0111\u1ea1t t\u0103ng tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh t\u1eeb 0,55 – 1,18 cm\/n\u0103m. Sinh tr\u01b0\u1edfng chi\u1ec1u cao c\u1ee7a Re g\u1eebng c\u1ee7a c\u00e1c m\u00f4 h\u00ecnh kh\u00f4ng c\u00f3 s\u1ef1 kh\u00e1c nhau l\u1edbn, t\u0103ng tr\u01b0\u1edfng chi\u1ec1u cao v\u00fat ng\u1ecdn dao \u0111\u1ed9ng t\u1eeb 0,62 – 0,89 m\/n\u0103m. T\u00e1n l\u00e1 Re g\u1eebng c\u1ee7a c\u00e1c m\u00f4 h\u00ecnh dao \u0111\u1ed9ng t\u1eeb 1,92 – 7,69 m; sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh t\u00e1n c\u00f3 \u1ea3nh h\u01b0\u1edfng r\u00f5 r\u1ec7t \u0111\u1ebfn sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh. Tr\u1eef l\u01b0\u1ee3ng c\u00e1c m\u00f4 h\u00ecnh r\u1eebng tr\u1ed3ng Re g\u1eebng kh\u00e1 th\u1ea5p, tr\u1eef l\u01b0\u1ee3ng dao \u0111\u1ed9ng t\u1eeb 45,28 – 172,51 m3<\/sup>\/ha v\u00e0 t\u0103ng tr\u01b0\u1edfng tr\u1eef l\u01b0\u1ee3ng t\u1eeb 2,38 – 7,19 m3<\/sup>\/ha\/n\u0103m \u0111\u1ed1i v\u1edbi r\u1eebng t\u1eeb 17 – 25 tu\u1ed5i. Ch\u1ea5t l\u01b0\u1ee3ng c\u00e2y Re g\u1eebng \u1edf c\u00e1c m\u00f4 h\u00ecnh kh\u00e1 t\u1ed1t v\u1edbi \u0111\u1ed9 th\u1eb3ng th\u00e2n t\u1eeb 3,6 \u0111i\u1ec3m tr\u1edf l\u00ean, \u00edt khi b\u1ecb s\u00e2u b\u1ec7nh. C\u00e2y c\u00f3 ch\u1ea5t l\u01b0\u1ee3ng t\u1ed1t v\u00e0 trung b\u00ecnh chi\u1ebfm \u0111a s\u1ed1, c\u00e2y ch\u1ea5t l\u01b0\u1ee3ng x\u1ea5u chi\u1ebfm d\u01b0\u1edbi 27%.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> C\u1ea7u Hai, Re g\u1eebng, r\u1eebng tr\u1ed3ng h\u1ed7n giao, sinh tr\u01b0\u1edfng<\/td>\n<\/tr>\n

\n

<\/a>Evaluating growth of plantation models of Cinnamomum burmannii<\/em> (Nees & t. Nees) Blume in Cau Hai, Phu Tho province<\/strong><\/p>\n

Cinnamomum burmannii <\/em>is a big size evergreen broad-leaved tree with wide ecological amplitude. There are gray white wood and fine wood grain, and its wood is used for construction and furniture. The species have been widely planted in several provinces from Northern Vietnam, and is a promising tree. Assessment results of 12 planting models of Cinnamomum burmannii <\/em>from 12 to 25 years showed that the species is slow growing, and increment of diameter is from 0.55 to 1.18 cm\/year. Height growth is not much different between the models, and increment of height is from 0.62 to 0.89 m\/year. Canopy of C.burmannii <\/em>is quite wide, and is from 1.92 to 7.69 m, and canopy growth significantly affects diameter growth. Volume of the models are quite low, and volume increment of the models from 17 to 25 years is from 2.38 to 7.19 m3<\/sup>\/ha\/year. Quality of the species in the models is quite good, stem straight is 3.6 points or more, and the trees are less affected by pests and diseases. Good and medium trees for quality are mostly, and the bad trees occupy less than 27%.<\/p>\n

Keywords:<\/em><\/strong> Cau Hai, Cinnamomum burmannii, <\/em>mixed plantation, growth<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u0110\u00c1NH GI\u00c1 SINH TR\u01af\u1edeNG 25 LO\u00c0I C\u00c2Y L\u00c1 R\u1ed8NG B\u1ea2N \u0110\u1ecaA C\u1ee6A M\u00d4 H\u00ccNH TR\u1ed2NG H\u1ed6N GIAO T\u1ea0I TR\u1ea0M TH\u1ef0C NGHI\u1ec6M L\u00c2M SINH L\u01af\u01a0NG TH\u1ecaNH, T\u1ec8NH Y\u00caN B\u00c1I<\/p>\n

<\/a>Nguy\u1ec5n V\u0103n Th\u1ecd1<\/sup>, Nguy\u1ec5n Anh Duy1<\/sup>, Nguy\u1ec5n Ho\u00e0ng Ngh\u0129a2<\/sup><\/p>\n

Trung t\u00e2m Khoa h\u1ecdc L\u00e2m nghi\u1ec7p v\u00f9ng Trung t\u00e2m B\u1eafc B\u1ed9;
\n2<\/sup>H\u1ed9i Khoa h\u1ecdc K\u1ef9 thu\u1eadt L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

K\u1ebft qu\u1ea3 \u0111\u00e1nh gi\u00e1 sinh tr\u01b0\u1edfng c\u00e1c lo\u00e0i c\u00e2y l\u00e1 r\u1ed9ng b\u1ea3n \u0111\u1ecba 14 tu\u1ed5i trong m\u00f4 h\u00ecnh tr\u1ed3ng h\u1ed7n giao t\u1ea1i Tr\u1ea1m Th\u1ef1c nghi\u1ec7m L\u00e2m sinh L\u01b0\u01a1ng Th\u1ecbnh, Y\u00ean B\u00e1i cho th\u1ea5y: \u0110a s\u1ed1 c\u00e1c lo\u00e0i sinh tr\u01b0\u1edfng nhanh (17\/25 lo\u00e0i), t\u1ef7 l\u1ec7 s\u1ed1ng c\u00f3 s\u1ef1 bi\u1ebfn \u0111\u1ed9ng r\u1ea5t l\u1edbn v\u00e0 3 lo\u00e0i (B\u00e1ch xanh, L\u00e1t hoa, Nghi\u1ebfn) ch\u1ebft to\u00e0n b\u1ed9; trong c\u00e1c lo\u00e0i sinh tr\u01b0\u1edfng nhanh g\u1ed3m c\u1ea3 c\u00e1c lo\u00e0i cho g\u1ed7 t\u1ed1t, gi\u00e1 tr\u1ecb kinh t\u1ebf cao nh\u01b0 V\u00f9 h\u01b0\u01a1ng, Xoan \u0111\u00e0o, D\u1ebb \u0111\u1ecf, Lim xanh. V\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng c\u00e2y tr\u1ed3ng th\u00ec c\u00f3 18 lo\u00e0i c\u00f3 h\u00ecnh th\u00e2n th\u1eb3ng, trong \u0111\u00f3: 4 lo\u00e0i c\u00f3 c\u1ea3 th\u00e2n th\u1eb3ng, \u0111\u1ed9 nh\u1ecf c\u00e0nh v\u00e0 ph\u00e1t tri\u1ec3n ng\u1ecdn t\u1ed1t v\u00e0 11 lo\u00e0i c\u00f3 c\u1ea3 3 ch\u1ec9 ti\u00eau ch\u1ea5t l\u01b0\u1ee3ng \u1edf m\u1ee9c kh\u00e1. H\u1ea7u h\u1ebft c\u00e1c lo\u00e0i kh\u00f4ng b\u1ecb s\u00e2u b\u1ec7nh \u0111\u1ebfn th\u1eddi \u0111i\u1ec3m hi\u1ec7n t\u1ea1i, tr\u1eeb S\u1ed3i ph\u1ea3ng, Xoan \u0111\u00e0o, V\u1ea1ng tr\u1ee9ng b\u1ecb s\u00e2u \u0103n l\u00e1 v\u00e0 Re g\u1eebng b\u1ecb s\u00e2u \u0111\u1ee5c th\u00e2n. Tr\u00ean c\u01a1 s\u1edf \u0111\u00e1nh gi\u00e1 sinh tr\u01b0\u1edfng v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng c\u00e2y tr\u1ed3ng \u0111\u1ec1 xu\u1ea5t 5 lo\u00e0i c\u00e2y l\u00e1 r\u1ed9ng b\u1ea3n \u0111\u1ecba m\u1ecdc nhanh th\u00edch h\u1ee3p \u0111\u1ec3 tr\u1ed3ng h\u1ed7n lo\u00e0i t\u1ea1i Y\u00ean B\u00e1i v\u00e0 nh\u1eefng n\u01a1i c\u00f3 \u0111i\u1ec1u ki\u1ec7n sinh th\u00e1i t\u01b0\u01a1ng t\u1ef1, \u0111\u00f3 l\u00e0 S\u1ed3i ph\u1ea3ng, D\u1ebb cau, D\u1ebb \u0111\u1ecf, Xoan \u0111\u00e0o v\u00e0 Lim xanh v\u00e0 4 lo\u00e0i c\u00e2y c\u00f3 tri\u1ec3n v\u1ecdng l\u00e0 V\u00f9 h\u01b0\u01a1ng, Ch\u00f2 n\u00e2u, Ch\u00f2 ch\u1ec9 v\u00e0 Re g\u1eebng cho v\u00f9ng n\u00e0y.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> \u0110\u00e1nh gi\u00e1, sinh tr\u01b0\u1edfng, L\u01b0\u01a1ng Th\u1ecbnh, h\u1ed7n giao, c\u00e2y b\u1ea3n \u0111\u1ecba<\/td>\n<\/tr>\n

\n

<\/a>Growth of 25 native broad-leaved tree species in mixed plantation in Luong Thinh silviculture experimental station, Yen Bai province<\/strong><\/p>\n

<\/a>Growth of 14 year-old native broad-leaved tree species of mixed plantation in Luong Thinh Silvicultrue Experimetal Station shows that the most species (17 of 25 species) grow fast, servival rate of them differs clearly, three of which are entirely dead. There are four species, including Cinamomum banlansae, <\/em>Prunus arborea<\/em>, Lithocarpus ducampii <\/em>and Erythrophleum fordii, <\/em>which both grow fast and have good wood and high economic value. For quality of plants, 18 the specieces have straight stems, 4 species of which both have straight stems, small branches, and grow tops well, and 11 the species have three criteria of the quality rather good. Currently most species do not suffer from pests and diseases except Castanopsis cerebrina, Prunus arborea, <\/em>and Endospermum chinense <\/em>are damaged by leaf insect and Cinnamomum burmanni <\/em>is harmed by stem borer. Based on growing and quality of plants of the species, we suggest that 5 native broad-leaved tree species, including Castanopsis cerebrina, Quercus platycalyx,<\/em> Lithocarpus ducampii,<\/em> Prunus arborea, <\/em>and Erythrophleum fordii, <\/em>are suitable to plant mixed plantation in Yen Bai province and similar ecological area. There are 4 prospective species of planting mixed afforestation for this area such as Cinnamomum balansae<\/em> Dipterocarpus retusus, Parashorea chinensis, <\/em>and Cinnamomum burmanni.<\/em><\/p>\n

Keywords:<\/em> Mixed plantation, Yen Bai, native broad-leaved tree species<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u0110\u00c1NH GI\u00c1 SINH TR\u01af\u1edeNG C\u00c1C M\u00d4 H\u00ccNH R\u1eeaNG TR\u1ed2NG CH\u00d2 N\u00c2U (Dipterocarpus retusus<\/em> Blume) T\u1ea0I C\u1ea6U HAI, T\u1ec8NH PH\u00da TH\u1ecc<\/p>\n

<\/a>Nguy\u1ec5n V\u0103n Th\u1ecd1<\/em>, \u0110\u00e0o H\u00f9ng M\u1ea1nh1<\/sup>, Ph\u1ea1m Quang Ti\u1ebfn1<\/sup>
\nD\u01b0\u01a1ng Th\u1ecb Minh Hu\u1ebf1<\/sup>, Nguy\u1ec5n Ho\u00e0ng Ngh\u0129a2<\/sup><\/p>\n

Trung t\u00e2m Khoa h\u1ecdc L\u00e2m nghi\u1ec7p v\u00f9ng Trung t\u00e2m B\u1eafc B\u1ed9
\n2<\/sup>H\u1ed9i Khoa h\u1ecdc K\u1ef9 thu\u1eadt L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Vi\u1ec7c s\u1eed d\u1ee5ng c\u00e2y l\u00e1 r\u1ed9ng b\u1ea3n \u0111\u1ecba \u0111\u1ec3 tr\u1ed3ng r\u1eebng tr\u1ed3ng g\u1ed7 l\u1edbn s\u1ebd l\u00e0m \u0111a d\u1ea1ng c\u01a1 c\u1ea5u c\u00e2y tr\u1ed3ng, t\u0103ng t\u00ednh \u1ed5n \u0111\u1ecbnh c\u1ee7a h\u1ec7 sinh th\u00e1i r\u1eebng qu\u1ed1c gia v\u00e0 l\u00e0m t\u0103ng gi\u00e1 tr\u1ecb r\u1eebng tr\u1ed3ng. Ch\u00f2 n\u00e2u l\u00e0 lo\u00e0i c\u00e2y g\u1ed7 l\u1edbn b\u1ea3n \u0111\u1ecba \u0111\u00e3 \u0111\u01b0\u1ee3c tr\u1ed3ng b\u1eb1ng gieo h\u1ea1t th\u1eb3ng n\u0103m 1971 v\u00e0 tr\u1ed3ng b\u1ea3o t\u1ed3n ngu\u1ed3n gen c\u00e2y r\u1eebng n\u0103m 2000, nh\u1eefng m\u00f4 h\u00ecnh c\u00f3 th\u1eddi gian \u0111\u1ee7 d\u00e0i \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 kh\u1ea3 n\u0103ng cung c\u1ea5p g\u1ed7 l\u1edbn. K\u1ebft qu\u1ea3 \u0111\u00e1nh gi\u00e1 c\u00e1c m\u00f4 h\u00ecnh tr\u1ed3ng Ch\u00f2 n\u00e2u \u1edf C\u1ea7u Hai cho th\u1ea5y: M\u00f4 h\u00ecnh b\u1ea3o t\u1ed3n ngu\u1ed3n gen Ch\u00f2 n\u00e2u c\u00f3 t\u1ef7 l\u1ec7 s\u1ed1ng cao \u0111\u1ea1t 75,9%, sinh tr\u01b0\u1edfng nhanh c\u1ea3 \u0111\u01b0\u1eddng k\u00ednh v\u00e0 chi\u1ec1u cao (D1.3<\/sub> = 19,3 cm, Hvn<\/sub> = 19 m, Hdc<\/sub> = 11,5 \u1edf r\u1eebng 19 tu\u1ed5i, D1.3<\/sub> = 43,2 cm, Hvn<\/sub> = 25,2 m, Hdc<\/sub> = 16,7 \u1edf r\u1eebng 48 tu\u1ed5i). T\u0103ng tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh v\u00e0 chi\u1ec1u cao c\u1ee7a Ch\u00f2 n\u00e2u l\u00e0 1,01 cm\/n\u0103m \u0111\u01b0\u1eddng k\u00ednh v\u00e0 1,0 m\/n\u0103m v\u1ec1 chi\u1ec1u cao \u1edf tu\u1ed5i 19 v\u00e0 0,88 cm\/n\u0103m \u0111\u01b0\u1eddng k\u00ednh v\u00e0 0,53 m\/n\u0103m v\u1ec1 chi\u1ec1u cao \u1edf tu\u1ed5i 48. Tr\u1eef l\u01b0\u1ee3ng r\u1eebng Ch\u00f2 n\u00e2u 19 tu\u1ed5i \u0111\u1ea1t 269,36 m3<\/sup>\/ha, t\u0103ng tr\u01b0\u1edfng tr\u1eef l\u01b0\u1ee3ng \u0111\u1ea1t 14,2 m3<\/sup>\/n\u0103m. Xu\u1ea5t x\u1ee9 Xu\u00e2n S\u01a1n sinh tr\u01b0\u1edfng nhanh nh\u1ea5t c\u1ea3 v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh v\u00e0 chi\u1ec1u cao, sinh tr\u01b0\u1edfng k\u00e9m nh\u1ea5t l\u00e0 xu\u1ea5t x\u1ee9 Tuy\u00ean Quang. N\u1ebfu \u0111\u01b0\u1ee3c ch\u1ecdn gi\u1ed1ng, t\u1ec9a th\u01b0a nu\u00f4i d\u01b0\u1ee1ng r\u1eebng tr\u1ed3ng Ch\u00f2 n\u00e2u c\u00f3 th\u1ec3 \u0111\u1ea1t n\u0103ng su\u1ea5t r\u1ea5t cao t\u1eeb 426,2 – 567 m3<\/sup>\/ha. Ch\u1ea5t l\u01b0\u1ee3ng th\u00e2n c\u00e2y Ch\u00f2 n\u00e2u r\u1ea5t t\u1ed1t \u0111\u1ec3 tr\u1ed3ng r\u1eebng cung c\u1ea5p g\u1ed7 l\u1edbn v\u1edbi th\u00e2n c\u00e2y th\u1eb3ng, ph\u00e2n c\u00e0nh cao, c\u00e0nh nh\u1ecf v\u00e0 ph\u00e1t tri\u1ec3n ng\u1ecdn r\u1ea5t t\u1ed1t, ch\u01b0a b\u1ecb s\u00e2u b\u1ec7nh g\u00e2y h\u1ea1i. V\u00ec v\u1eady, Ch\u00f2 n\u00e2u l\u00e0 lo\u00e0i c\u00e2y l\u00e1 r\u1ed9ng b\u1ea3n \u0111\u1ecba c\u00f3 ti\u1ec1m n\u0103ng tr\u1ed3ng r\u1eebng g\u1ed7 l\u1edbn \u1edf v\u00f9ng Trung t\u00e2m B\u1eafc B\u1ed9.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> C\u1ea7u Hai, Ch\u00f2 n\u00e2u, Ph\u00fa Th\u1ecd, r\u1eebng tr\u1ed3ng, sinh tr\u01b0\u1edfng<\/td>\n<\/tr>\n

\n

<\/a>Evaluating growth of plantation models of Dipterocarpus retusus<\/em> Blume in Cau Hai, Phu Tho province<\/strong><\/p>\n

Native broad-leaved tree species using for afforestation of big size timber will diversify crop stucture of forest trees, increases stability of national forest ecology and enhances the value of planted forests. Dipterocarpus retusus <\/em>Blume, a native big tree, was planted with seeds in 1971 and planted with seedlings for its genetic gene conservation of genetic resources in 2000. These afforestation models are enough time to evaluate their potentiality for supporting large size timber. Result of assessing models of D. retusus <\/em>in Cau Hai showed that the overall survival rate in the model of conservation of genetic resources is high and reaches 75.9 %. Growth of the species is fast both diameter and high, such as 19.3 cm in diameter at breast height (DBH), 19 m in high, and 11.5 m in height of lowest branches for the 19 year-old forest, and the 43.2 cm in diameter at breast height, 25.2 m in high, and 16.7 m in height of lowest branches for the 48 year-old forest. At 19 year-old, DBH and height increment of D.retusus <\/em>were 1.01 cm\/year and 1.0 m\/year, respectively. At 48 year-old, the DBH and height increment were 0.88 cm\/year and 0.53 m\/year, respectively. Stand volume at 19 year-old was 269.36 m3<\/sup>\/ha, and the volume increment was 14.2 m3<\/sup>\/ha\/year. The tree growth of Xuan Son provinance was fastest, and the tree growth of Tuyen Quang provinance was lowest. If the breeding selection and thinning the plantation forest were carried out, productivity of afforestation of D.retusus <\/em>could reach very high from 426.2 to 567.0 m3<\/sup>\/ha. Quantify of stem of the species is very good to plant afforestation for large size timber, such as straight stem, height of lowest branch is high, branhes are small, growing tops are good, the trees are not harmed by pests and diseases. Therefore, D.retusus <\/em>is a potential native broad-leaved species to plant afforestation for supporting large size timber in central northern region of Vietnam.<\/p>\n

Keywords:<\/em><\/strong> Cau Hai, Dipterocarpus retusus <\/em>Blume, <\/em>Phu Tho province, afforestation, growth<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>B\u01af\u1edaC \u0110\u1ea6U GHI NH\u1eacN S\u00c2U \u0102N L\u00c1 V\u00c0 NG\u1eccN NON G\u00c2Y H\u1ea0I R\u1eeaNG TR\u1ed2NG THANH TH\u1ea4T (Ailanthus triphysa<\/em>) T\u1ea0I T\u1ec8NH PH\u00da TH\u1ecc<\/p>\n

<\/a>\u0110\u00e0o Ng\u1ecdc Quang1<\/sup>, Ph\u1ea1m Quang Thu1<\/sup>, Nguy\u1ec5n Th\u1ecb \u00c1nh Nguy\u1ec7t2<\/sup>, Nguy\u1ec5n Minh Ch\u00ed1<\/sup><\/p>\n

1 Trung t\u00e2m Nghi\u00ean c\u1ee9u B\u1ea3o v\u1ec7 r\u1eebng
\n2 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

Thanh th\u1ea5t (<\/em>Ailanthus triphysa<\/em>)<\/em> ph\u00e2n b\u1ed1 r\u1ed9ng kh\u1eafp \u1edf Vi\u1ec7t Nam, l\u00e0 lo\u00e0i c\u00e2y g\u1ed7 l\u1edbn, m\u1ecdc nhanh, g\u1ed7 m\u1ec1m, th\u1edb th\u1eb3ng, m\u1ecbn, d\u1ec5 b\u00f3c, r\u1ea5t \u0111\u01b0\u1ee3c \u01b0a chu\u1ed9ng l\u00e0m g\u1ed7 d\u00e1n, bao b\u00ec, s\u1ea3n xu\u1ea5t di\u00eam… Thanh th\u1ea5t \u0111\u00e3 \u0111\u01b0\u1ee3c g\u00e2y tr\u1ed3ng t\u1ea1i m\u1ed9t s\u1ed1 \u0111\u1ecba ph\u01b0\u01a1ng nh\u01b0 \u1edf B\u00ecnh Ph\u01b0\u1edbc, Kh\u00e1nh H\u00f2a, Ph\u00fa Y\u00ean v\u1edbi k\u1ebft qu\u1ea3 ban \u0111\u1ea7u c\u00f3 tri\u1ec3n v\u1ecdng. Tuy nhi\u00ean m\u00f4 h\u00ecnh r\u1eebng tr\u1ed3ng kh\u1ea3o nghi\u1ec7m Thanh th\u1ea5t t\u1ea1i \u0110oan H\u00f9ng, Ph\u00fa Th\u1ecd \u0111\u00e3 ghi nh\u1eadn xu\u1ea5t hi\u1ec7n lo\u00e0i S\u00e2u \u0103n ng\u1ecdn non (Atteva fabriciella)<\/em> v\u00e0 S\u00e2u \u0103n l\u00e1 (Eligma narcissus)<\/em> g\u00e2y h\u1ea1i m\u1ea1nh. S\u00e2u \u0103n ng\u1ecdn non g\u00e2y h\u1ea1i n\u1eb7ng r\u1eebng tr\u1ed3ng Thanh th\u1ea5t \u1edf giai \u0111o\u1ea1n tu\u1ed5i 2 v\u00e0 tu\u1ed5i 3 v\u1edbi 100% s\u1ed1 c\u00e2y b\u1ecb h\u1ea1i, m\u1ee9c \u0111\u1ed9 g\u00e2y h\u1ea1i n\u1eb7ng v\u1edbi c\u1ea5p h\u1ea1i trung b\u00ecnh (R) t\u01b0\u01a1ng \u1ee9ng l\u00e0 2,82 v\u00e0 2,65. Ch\u00fang \u0103n tr\u1ee5i v\u1ecf c\u1ee7a c\u00e1c \u0111\u1ec9nh sinh tr\u01b0\u1edfng, g\u00e2y hi\u1ec7n t\u01b0\u1ee3ng ch\u1ebft ng\u1ecdn, sau \u0111\u00f3 c\u00e2y ph\u1ee5c h\u1ed3i nh\u01b0ng s\u1ebd h\u00ecnh th\u00e0nh nhi\u1ec1u ch\u1ed3i g\u00e2y \u1ea3nh h\u01b0\u1edfng l\u1edbn \u0111\u1ebfn sinh tr\u01b0\u1edfng v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng c\u00e2y. S\u00e2u \u0103n l\u00e1 g\u00e2y h\u1ea1i n\u1eb7ng \u0111\u1ed1i v\u1edbi r\u1eebng tr\u1ed3ng \u1edf giai \u0111o\u1ea1n 1 n\u0103m tu\u1ed5i v\u1edbi 100% s\u1ed1 c\u00e2y b\u1ecb h\u1ea1i, m\u1ee9c \u0111\u1ed9 b\u1ecb h\u1ea1i n\u1eb7ng (R = 2,57). Hai lo\u00e0i s\u00e2u n\u00e0y l\u00e0 sinh v\u1eadt g\u00e2y h\u1ea1i nguy hi\u1ec3m \u0111\u1ed1i v\u1edbi r\u1eebng tr\u1ed3ng Thanh th\u1ea5t. Do \u0111\u00f3, c\u1ea7n ti\u1ebfp t\u1ee5c nghi\u00ean c\u1ee9u \u0111\u1eb7c \u0111i\u1ec3m sinh h\u1ecdc, sinh th\u00e1i v\u00e0 c\u00e1c bi\u1ec7n ph\u00e1p ph\u00f2ng tr\u1eeb \u0111\u1ec3 c\u00f3 gi\u1ea3i ph\u00e1p qu\u1ea3n l\u00fd hi\u1ec7u qu\u1ea3.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> S\u00e2u \u0103n l\u00e1, s\u00e2u \u0103n ng\u1ecdn non, s\u00e2u h\u1ea1i, Thanh th\u1ea5t<\/td>\n<\/tr>\n

\n

<\/a>First report on two catepillars damaging Ailanthus triphysa <\/em>plantation in Phu Tho province<\/strong><\/p>\n

Ailanthus triphysa<\/em> is a large and fast-growing native tree and widely distributed in Vietnam. The wood is soft, straight, smooth, easy-to-peel, favored as plywood, packaging, and matches. A. triphysa<\/em> has been cultivated in some provinces such as Binh Phuoc, Khanh Hoa and Phu Yen with initial promising results. However, according to the surveys of the Forest Protection Research Centre undertaken in 2016, 2017 and 2018 on the A. triphysa<\/em> plantation in Doan Hung district, Phu Tho province, all trees (100%) in the trial were heavily impacted by two insect pest species, Atteva fabriciella and Eligma narcissus. A. fabriciella<\/em> severely damaging A. triphysa<\/em> plantation in the age of 2 and 3 years with average damage index (R) is 2.82 and 2.65 respectively. They eat all bark of the young shoot, causing shoot death, after that the plants recover but will form many shoots that greatly affect the growth and quality of the tree. Average damage index (R) of E. narcissus in A. triphysa<\/em> plantation at 1 year of age is 2.57. These two species are dangerous insects harmful to A. triphysa<\/em> plantation, so further research is needed to determine their biology, ecology for efective management.<\/p>\n

Keywords:<\/em><\/strong> Ailanthus triphysa, Atteva fabriciella, Eligma narcissus,<\/em> insect<\/p>\n

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

<\/a>C\u00d4NG NGH\u1ec6 \u00c9P NHI\u1ec6T T\u1ea0O V\u00c1N GH\u00c9P THANH T\u1eea B\u01af\u01a0NG L\u00d4NG \u0110I\u1ec6N BI\u00caN (Dendrocalamus dienbienensis <\/em>H.N Nguyen & V.T. Nguyen)<\/p>\n

<\/a>L\u00ea Th\u1ecb H\u01b0ng1<\/sup>, B\u00f9i Duy Ng\u1ecdc1<\/sup>, Nguy\u1ec5n Anh D\u0169ng2<\/sup><\/p>\n

Vi\u1ec7n Nghi\u00ean c\u1ee9u C\u00f4ng nghi\u1ec7p r\u1eebng
\n2Trung 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

B\u01b0\u01a1ng l\u00f4ng \u0111i\u1ec7n bi\u00ean (Dendrocalamus dienbienensis <\/em>H.N Nguyen & V.T. Nguyen) \u1edf c\u1ea5p \u0111\u1ed9 3 – 4 tu\u1ed5i \u0111\u00e3 \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u x\u00e1c \u0111\u1ecbnh th\u00f4ng s\u1ed1 c\u00f4ng ngh\u1ec7 \u00e9p nhi\u1ec7t \u0111\u1ec3 t\u1ea1o v\u00e1n gh\u00e9p thanh. C\u00e1c thanh tre \u0111\u01b0\u1ee3c gia c\u00f4ng c\u00f3 k\u00edch th\u01b0\u1edbc 400 \u00b4 20 \u00b4 4 (mm) v\u00e0 s\u1ea5y \u0111\u1ea1t \u0111\u1ed9 \u1ea9m 10 – 12%, sau \u0111\u00f3 \u0111\u01b0\u1ee3c gh\u00e9p t\u1ea1o v\u00e1n gh\u00e9p thanh tre 3 l\u1edbp b\u1eb1ng ch\u1ea5t k\u1ebft d\u00ednh Melamine Urea Formaldehyde (MUF). Th\u00f4ng s\u1ed1 ch\u1ebf \u0111\u1ed9 \u00e9p: nhi\u1ec7t \u0111\u1ed9 (T0<\/sup>), \u00e1p su\u1ea5t (P), thay \u0111\u1ed5i nh\u01b0 sau: (T0<\/sup> = 110, 115, 120o<\/sup>C; P = 1,0; 1,2; 1,4 MPa v\u00e0 t = 1,5 ph\u00fat\/mm chi\u1ec1u d\u00e0y). K\u1ebft qu\u1ea3 cho th\u1ea5y th\u00f4ng s\u1ed1 c\u00f4ng ngh\u1ec7 \u00e9p \u0111\u00e3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ch\u1ea5t l\u01b0\u1ee3ng v\u00e1n gh\u00e9p tre th\u1ec3 hi\u1ec7n \u1edf c\u00e1c t\u00ednh ch\u1ea5t c\u01a1, v\u1eadt l\u00fd ch\u1ee7 y\u1ebfu. Kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 t\u00edch (g) \u0111\u1ea1t 0,8 – 0,92 g\/cm3<\/sup>; WA \u0111\u1ea1t 18,7 – 23,1%; TS \u0111\u1ea1t 6,0 – 7,6%; MOR \u0111\u1ea1t 110,13 – 156,74 MPa; MOE \u0111\u1ea1t 10106,80 – 16731,00 MPa; c\u01b0\u1eddng \u0111\u1ed9 d\u00e1n d\u00ednh \u0111\u1ea1t 0,65 – 1,25 MPa. Trong kho\u1ea3ng bi\u1ebfn thi\u00ean c\u1ee7a nhi\u1ec7t \u0111\u1ed9, \u00e1p l\u1ef1c \u00e9p v\u1edbi 9 ch\u1ebf \u0111\u1ed9 \u00e9p nhi\u1ec7t (C\u0110) th\u00ec ch\u1ebf \u0111\u1ed9 C\u0110 5
\n(T0<\/sup> = 115o<\/sup>C, P = 1.2 MPa, t = 20 ph\u00fat) c\u00f3 k\u1ebft qu\u1ea3 x\u00e1c \u0111\u1ecbnh c\u00e1c ch\u1ec9 ti\u00eau ch\u1ea5t l\u01b0\u1ee3ng l\u00e0 t\u1ed1t nh\u1ea5t (g = 0,87 g\/cm3<\/sup>, WA = 18,5%, TS = 6,0%, MOR = 156,74 MPa,
\nMOE = 16731 MPa, c\u01b0\u1eddng \u0111\u1ed9 d\u00e1n d\u00ednh = 1,25 MPa, s\u1ea3n ph\u1ea9m \u0111\u1ea1t Class 1: s\u1eed d\u1ee5ng cho s\u1ea3n ph\u1ea9m \u1edf \u0111i\u1ec1u ki\u1ec7n trong nh\u00e0). V\u00e1n gh\u00e9p thanh tre t\u1ea1o ra v\u1edbi th\u00f4ng s\u1ed1 ch\u1ebf \u0111\u1ed9 \u00e9p l\u1ef1a ch\u1ecdn \u0111\u00e1p \u1ee9ng t\u1ed1t y\u00eau c\u1ea7u l\u00e0m v\u1eadt li\u1ec7u x\u00e2y d\u1ef1ng v\u00e0 s\u1ea3n xu\u1ea5t \u0111\u1ed3 n\u1ed9i th\u1ea5t.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> C\u00f4ng ngh\u1ec7 \u00e9p nhi\u1ec7t, b\u01b0\u01a1ng l\u00f4ng \u0111i\u1ec7n bi\u00ean , v\u00e1n gh\u00e9p, v\u00e1n s\u00e0n<\/td>\n<\/tr>\n

\n

<\/a>Technology heat pressing plybamboo made from (Dendrocalamus dienbienensis <\/em>H.N Nguyen & V.T. Nguyen)<\/strong><\/p>\n

This study has determined the heat pressing technology for plybamboo from Dendrocalamus dienbienensis <\/em>H.N Nguyen & V.T. Nguyen at 3 – 4 years old. Bamboo were cut into strips of 400 \u00b4 20 \u00b4 4 mm and they were dried to 10 – 12% moisture content, then Bamboo strips were heat-pressed to make plybamboo 3 – layers with Melamine Urea Formaldehyde (MUF) with variable heat modification parameters (T0<\/sup> = 110o<\/sup>C, 115o<\/sup>C, 120o<\/sup>C; P = 1.0 MPa, 1.2 MPa, 1.4 MPa; t = 1.5s\/mm). The results showed that heat pressing technology effects the quality of bamboo board through identification and evaluation of physical and mechanical properties such as: density, water absorption (WA), Thickness swelling (TS), Modulus of rupture (MOR), Modulus of elasticity (MOE). The results determination of the quality parameters of bamboo boards using MUF glue were as follows: density ranged from 0.8 g\/cm3<\/sup> to 0.92 g\/cm3<\/sup>; Water Absorption (WA) ranged from 18.7% to 23.1%; Thickness Swelling (TS) ranged from 6.0% to 7.6%; Modulus of Rupture (MOR) ranged from 110.13 MPa to 156.74 MPa; Modunlus of Elasticity (MOE) ranged from 10106.80 MPa to 16731.00 MPa; Adhesive strength ranged from 0,65 MPa to 1.25 MPa. In the range of temperature, press pressure with 9 modes of heat press, the 5th mode (T0<\/sup> = 115o<\/sup>C, P = 1.2 MPa, t = 20\u2019) results in determining the best quality criteria. WA = 18.5%, TS = 6.0%, MOR = 156.74 MPa, MOE = 16731 MPa, shear strength = 1.25 MPa, Class 1: used in indoor conditions).<\/p>\n

Keywords:<\/em><\/strong> Heat pressing technology, Dendrocalamus dienbienensis<\/em> H.N Nguyen & V.T.Nguyen, modification plybamboo, flooing bamboo<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

T\u1ea0P CH\u00cd KHOA H\u1eccC L\u00c2M NGHI\u1ec6P S\u1ed0 CHUY\u00caN \u0110\u1ec0 – 2019 1. Trung t\u00e2m Khoa h\u1ecdc L\u00e2m nghi\u1ec7p V\u00f9ng Trung t\u00e2m B\u1eafc B\u1ed9 60 n\u0103m x\u00e2y d\u1ef1ng v\u00e0 ph\u00e1t tri\u1ec3n (1959 – 2019) Nguy\u1ec5n Anh D\u0169ng 3 2. K\u1ebft qu\u1ea3 28 n\u0103m x\u00e2y d\u1ef1ng v\u00e0 ph\u00e1t tri\u1ec3n V\u01b0\u1eddn S\u01b0u t\u1eadp Th\u1ef1c v\u1eadt C\u1ea7u Hai c\u1ee7a […]<\/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\/1744"}],"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=1744"}],"version-history":[{"count":3,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/1744\/revisions"}],"predecessor-version":[{"id":2401,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/1744\/revisions\/2401"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/media?parent=1744"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/categories?post=1744"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/tags?post=1744"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}