{"id":2219,"date":"2021-08-26T10:08:23","date_gmt":"2021-08-26T03:08:23","guid":{"rendered":"http:\/\/vafs.gov.vn\/en\/?p=2219"},"modified":"2023-11-23T12:24:51","modified_gmt":"2023-11-23T05:24:51","slug":"vietnam-journal-of-forest-science-number-3-2021","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/en\/vietnam-journal-of-forest-science-number-3-2021\/","title":{"rendered":"Vietnam Journal of Forest Science Number 3-2021"},"content":{"rendered":"

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T\u1ea0P CH\u00cd KHOA H\u1eccC L\u00c2M NGHI\u1ec6P S\u1ed0 3<\/strong> – <\/strong>20<\/strong>21<\/strong><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
1.<\/td>\n\u1ee8ng d\u1ee5ng m\u1ed9t s\u1ed1 m\u00e3 v\u1ea1ch ADN trong nh\u1eadn di\u1ec7n Th\u00f4ng xu\u00e2n nha (Pinus cernua<\/em> L. K. Phan ex Aver., K. S. Nguyen & T. H. Nguyen)<\/td>\nApplication of DNA barcode in identification of Pinus cernua L. K. Phan ex Aver., K. S. Nguyen & T. H. Nguyen<\/td>\nPh\u00ed H\u1ed3ng H\u1ea3i
\nHo\u00e0ng V\u0103n S\u00e2m
\nH\u00e0 V\u0103n Hu\u00e2n
\nB\u00f9i Th\u1ecb Mai H\u01b0\u01a1ng<\/td>\n		4<\/td>\n<\/tr>\n
2.<\/td>\n\u0110\u00e1nh gi\u00e1 \u0111a d\u1ea1ng di truy\u1ec1n v\u00e0 nh\u1eadn d\u1ea1ng ngu\u1ed3n gen c\u00e2y \u01af\u01a1i (Scaphium macropodum <\/em>(Miq)) b\u1eb1ng ch\u1ec9 th\u1ecb ph\u00e2n t\u1eed<\/td>\nGenetic diversity assessment and genetic resources indentification of Scaphium macropodum<\/em> (Miq) using moleculer markers<\/td>\nTr\u1ea7n Th\u1ecb Thu H\u00e0
\nPh\u1ea1m \u0110\u00ecnh S\u00e2m
\nH\u00e0 Th\u1ecb Huy\u1ec1n Ng\u1ecdc
\nNguy\u1ec5n Th\u1ecb Huy\u1ec1n
\nL\u00ea Th\u1ecb Th\u1ee7y
\nNguy\u1ec5n Th\u1ecb Vi\u1ec7t H\u00e0
\nMai Th\u1ecb Ph\u01b0\u01a1ng Th\u00fay
\nNguy\u1ec5n H\u1eefu Th\u1ecbnh Ho\u00e0ng Th\u1ecb Nhung
\nH\u1ed3 Trung L\u01b0\u01a1ng
\nL\u00ea S\u01a1n<\/td>\n		13<\/td>\n<\/tr>\n
3.<\/td>\nNghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng c\u00e1c d\u00f2ng keo lai n\u0103ng su\u1ea5t cao BV376, BV586, BB055 b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p nu\u00f4i c\u1ea5y m\u00f4<\/td>\nIn vitro micropropagation for newly seleted acacia hybrid clones BV376, BV586 v\u00e0 BB055<\/td>\nV\u0103n Thu Huy\u1ec1n
\nMai Th\u1ecb Ph\u01b0\u01a1ng Th\u00fay
\n\u0110\u1ed3ng Th\u1ecb \u01afng
\nNguy\u1ec5n Anh D\u0169ng
\nL\u00ea Th\u1ecb Hoa
\nL\u01b0u Th\u1ecb Qu\u1ef3nh
\nHo\u00e0ng Th\u1ecb H\u1ed3ng H\u1ea1nh
\n\u0110\u1ed7 H\u1eefu S\u01a1n
\nNguy\u1ec5n \u0110\u1ee9c Ki\u00ean
\n\u0110\u1ed7 Ti\u1ebfn Ph\u00e1t
\nL\u00ea S\u01a1n<\/td>\n		22<\/td>\n<\/tr>\n
4.<\/td>\nNghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng c\u00e1c d\u00f2ng keo lai m\u1edbi BV350 v\u00e0 BV523 b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p nu\u00f4i c\u1ea5y m\u00f4 t\u1ebf b\u00e0o<\/td>\nStudy on propagation of new acacia hybrid clones (Acacia mangium<\/em> \u00b4 Acacia auriculiformis<\/em>) BV350 and BV523 by tissue culture method<\/td>\nT\u1ea1 Thu Trang
\nKhu\u1ea5t Th\u1ecb H\u1ea3i Ninh
\n\u0110\u1ed7 H\u1eefu S\u01a1n
\nC\u1ea5n Th\u1ecb Lan
\nKi\u1ec1u Th\u1ecb H\u00e0
\nNguy\u1ec5n Th\u1ecb Thu Dung<\/td>\n		33<\/td>\n<\/tr>\n
5.<\/td>\nNghi\u00ean c\u1ee9u \u0111\u1eb7c \u0111i\u1ec3m sinh l\u00fd h\u1ea1t gi\u1ed1ng v\u00e0 k\u1ef9 thu\u1eadt nh\u00e2n gi\u1ed1ng c\u00e2y S\u1ea5u t\u00eda (Sandoricum indicum<\/em> Cav.) t\u1eeb h\u1ea1t<\/td>\nResearch on physiological characteristics of seeds and propagation techniques of Sandoricum indicum<\/em> Cav. from seeds<\/td>\nNguy\u1ec5n Ki\u00ean C\u01b0\u1eddng
\n\u0110\u1ed7 Th\u1ecb Ng\u1ecdc H\u00e0
\nPh\u00f9ng V\u0103n T\u1ec9nh
\nV\u00f5 \u0110\u1ea1i H\u1ea3i
\nNguy\u1ec5n Minh Thanh<\/td>\n		45<\/td>\n<\/tr>\n
6.<\/td>\nNghi\u00ean c\u1ee9u k\u1ef9 thu\u1eadt nh\u00e2n gi\u1ed1ng c\u00e2y \u01af\u01a1i ((Scaphium macropodum<\/em> (Miq)) b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p gh\u00e9p<\/td>\nResearch on propagation of uoi (Scaphium macropodum<\/em> (Miq)) utilizing grafting techniques<\/td>\n\u0110o\u00e0n \u0110\u00ecnh Tam
\nNguy\u1ec5n Th\u00f9y M\u1ef9 Linh
\nH\u00e0 \u0110\u00ecnh Long
\nTr\u1ea7n Th\u1ecb H\u1ea3i<\/td>\n		58<\/td>\n<\/tr>\n
7.<\/td>\nNghi\u00ean c\u1ee9u \u1ea3nh h\u01b0\u1edfng c\u1ee7a th\u1eddi v\u1ee5 tr\u1ed3ng \u0111\u1ebfn sinh tr\u01b0\u1edfng c\u00e2y L\u1ea1c ti\u00ean (Passiflora foetida<\/em>\u00a0L.) t\u1ea1i t\u1ec9nh
\nTh\u00e1i Nguy\u00ean<\/td>\n		Research on the effect of planting time on the growth of Passiflora foetida<\/em> L. in Thai Nguyen province<\/td>\nTr\u1ecbnh \u0110\u00ecnh Kh\u00e1
\nH\u00e0 Duy Tr\u01b0\u1eddng
\nNguy\u1ec5n Th\u1ecb Thu Hi\u1ec1n<\/td>\n		65<\/td>\n<\/tr>\n
8.<\/td>\nSinh tr\u01b0\u1edfng v\u00e0 n\u0103ng su\u1ea5t r\u1eebng tr\u1ed3ng Hu\u1ef7nh (Tarrietia javanica<\/em> Blume) \u1edf m\u1ed9t s\u1ed1 t\u1ec9nh v\u00f9ng B\u1eafc Trung B\u1ed9<\/td>\nGrowth and productivity of Tarrietia javanica<\/em> plantation in some North Central provinces<\/td>\nV\u0169 \u0110\u1ee9c B\u00ecnh
\nPh\u1ea1m Ti\u1ebfn H\u00f9ng
\nPh\u1ea1m Xu\u00e2n \u0110\u1ec9nh
\nNguy\u1ec5n Th\u1ecb Th\u1ea3o Trang
\nNguy\u1ec5n H\u1ea3i Th\u00e0nh
\nL\u00ea C\u00f4ng \u0110\u1ecbnh
\nNguy\u1ec5n Th\u1ecb Thanh Nga
\nH\u00e0 V\u0103n Thi\u1ec7n<\/td>\n		73<\/td>\n<\/tr>\n
9.<\/td>\nHi\u1ec7n tr\u1ea1ng g\u00e2y tr\u1ed3ng c\u00e2y S\u01a1n tra (Docynia indica <\/em>(Wall.) Decne) t\u1ea1i huy\u1ec7n Than Uy\u00ean, t\u1ec9nh Lai Ch\u00e2u<\/td>\nCultivation of Docynia indica<\/em> (Wall.) Decne in Than Uyen district, Lai Chau province<\/td>\nD\u01b0\u01a1ng V\u0103n Th\u1ea3o
\nB\u00f9i Th\u1ee5y Anh<\/td>\n		83<\/td>\n<\/tr>\n
10.<\/td>\n\u0110\u1eb7c \u0111i\u1ec3m c\u1ea5u tr\u00fac kh\u00f4ng gian c\u1ee7a c\u00e1c lo\u00e0i c\u00e2y \u01b0u th\u1ebf trong r\u1eebng t\u1ef1 nhi\u00ean trung b\u00ecnh Khu b\u1ea3o t\u1ed3n thi\u00ean nhi\u00ean B\u00ecnh Ch\u00e2u – Ph\u01b0\u1edbc B\u1eedu<\/td>\nSpatial structure characteristics of dominant species in medium natural forest at Binh Chau – Phuoc Buu nature reserve<\/td>\nNguy\u1ec5n V\u0103n Qu\u00fd
\nNguy\u1ec5n Thanh Tu\u1ea5n
\nNguy\u1ec5n V\u0103n H\u1ee3p
\nNguy\u1ec5n V\u0103n Th\u00e0nh<\/td>\n		92<\/td>\n<\/tr>\n
11.<\/td>\nNghi\u00ean c\u1ee9u b\u1ed5 sung k\u1ef9 thu\u1eadt chuy\u1ec3n h\u00f3a r\u1eebng tr\u1ed3ng keo lai v\u00e0 Keo tai t\u01b0\u1ee3ng s\u1ea3n xu\u1ea5t g\u1ed7 nh\u1ecf th\u00e0nh r\u1eebng g\u1ed7 l\u1edbn<\/td>\nResearch on techniques to convert short-rotation to long-rotation acacia hybrid and Acacia mangium<\/em> plantations for saw-logs production<\/td>\nTr\u1ea7n L\u00e2m \u0110\u1ed3ng
\n\u0110\u1eb7ng V\u0103n Thuy\u1ebft
\nChu Ng\u1ecdc Qu\u00e2n
\nTr\u1ea7n H\u1ed3ng V\u00e2n
\nHo\u00e0ng Th\u1ecb Nhung
\nHo\u00e0ng V\u0103n Th\u00e0nh
\nTr\u1ea7n Anh H\u1ea3i
\nD\u01b0\u01a1ng Quang Trung
\nPh\u1ea1m V\u0103n Vinh<\/td>\n		106<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n\n\n\n\n\n\n\n\n
12.<\/td>\nT\u01b0\u01a1ng quan gi\u1eefa nh\u00e2n t\u1ed1 \u0111i\u1ec1u tra l\u00e2m ph\u1ea7n v\u1edbi ch\u1ec9 ti\u00eau l\u00fd, h\u00f3a t\u00ednh \u0111\u1ea5t v\u00e0 th\u1eddi gian b\u1ecf h\u00f3a c\u1ee7a r\u1eebng ph\u1ee5c h\u1ed3i sau canh t\u00e1c n\u01b0\u01a1ng r\u1eaby t\u1ea1i huy\u1ec7n M\u1ed9c Ch\u00e2u, t\u1ec9nh S\u01a1n La<\/td>\nRelationship between some inventory factors and soil physical and chemical properties and fallow time of forest rehabilitation after shifting cultivation in Moc Chau district, Son La province<\/td>\nNguy\u1ec5n Ho\u00e0ng H\u01b0\u01a1ng
\nTr\u1ea7n Vi\u1ec7t H\u00e0
\nCao Th\u1ecb Thu Hi\u1ec1n
\nL\u00ea Tu\u1ea5n Anh
\nV\u0169 Th\u1ecb Huy\u1ec1n<\/td>\n		122<\/td>\n<\/tr>\n
13.<\/td>\nTh\u00e0nh ph\u1ea7n v\u00e0 m\u1ee9c \u0111\u1ed9 x\u00e2m h\u1ea1i c\u1ee7a m\u1ed9t s\u1ed1 th\u1ef1c v\u1eadt ngo\u1ea1i lai t\u1ea1i T\u1ec9nh L\u00e2m \u0110\u1ed3ng<\/td>\nAlien invasive plants and their impact in Lam Dong province, Vietnam<\/td>\nNguy\u1ec5n Th\u00e0nh M\u1ebfn
\nL\u01b0\u01a1ng V\u0103n D\u0169ng
\nHo\u00e0ng Thanh Tr\u01b0\u1eddng
\nL\u01b0u Th\u1ebf Trung
\nPh\u1ea1m Tr\u1ecdng Nh\u00e2n
\n\u0110\u1ed3ng Th\u1ecb Hi\u1ec1n<\/td>\n		135<\/td>\n<\/tr>\n
14.<\/td>\nB\u01b0\u1edbc \u0111\u1ea7u x\u00e1c \u0111\u1ecbnh lo\u00e0i M\u1ecdt (Coccotrypes<\/em> sp.) \u0111\u1ee5c qu\u1ea3 \u0110\u01b0\u1edbc (Rhizophora apiculata<\/em> BL.) \u1edf r\u1eebng ng\u1eadp m\u1eb7n t\u1ea1i v\u00f9ng t\u00e2y nam b\u1ed9<\/td>\nPreliminary identification the beetle (Coccotrypes<\/em> sp.) boring the propagules of mangrove (Rhizophora apiculata<\/em> BL.) in the mangrove forest of the Southwest region<\/td>\nTr\u1ea7n Xu\u00e2n H\u01b0ng
\nL\u00ea V\u0103n B\u00ecnh<\/td>\n		146<\/td>\n<\/tr>\n
15.<\/td>\nM\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m sinh h\u1ecdc lo\u00e0i X\u00e9n t\u00f3c n\u00e2u Monochamus alternatus<\/em> Hope (Coleoptera: Cerambycidae) h\u1ea1i th\u00f4ng m\u00e3 v\u0129 t\u1ea1i m\u1ed9t s\u1ed1 t\u1ec9nh ph\u00eda b\u1eafc Vi\u1ec7t Nam<\/td>\nSome biological characteristics of longhorn beetle Monochamus alternatus<\/em> Hope (Coleoptera: Cerambycidae) hamrful Pinus massoniana in some province North Vietnam<\/td>\nNguy\u1ec5n V\u0103n Th\u00e0nh
\nL\u00ea V\u0103n B\u00ecnh<\/td>\n		154<\/td>\n<\/tr>\n
16.<\/td>\n\u1ea2nh h\u01b0\u1edfng c\u1ee7a kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang v\u00e0 m\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m c\u1ea5u t\u1ea1o \u0111\u1ebfn \u0111\u1ed9 co r\u00fat ngang g\u1ed7 Xoan ta (Melia azedarach<\/em> L.)<\/td>\nEffect of air-dry density and some anatomical features on transverse shrinkage of Melia azedarach<\/em> L. wood<\/td>\nD\u01b0\u01a1ng V\u0103n \u0110o\u00e0n
\nNguy\u1ec5n T\u1eed Kim<\/td>\n		162<\/td>\n<\/tr>\n
17.<\/td>\nDevelopment of automatic color recognition system for panel surface in laser sealing process<\/td>\nPh\u00e1t tri\u1ec3n h\u1ec7 th\u1ed1ng nh\u1eadn di\u1ec7n m\u00e0u s\u1eafc t\u1ef1 \u0111\u1ed9ng cho b\u1ec1 m\u1eb7t v\u00e1n g\u1ed7 c\u00f4ng nghi\u1ec7p trong m\u00e1y d\u00e1n c\u1ea1nh b\u1eb1ng c\u00f4ng ngh\u1ec7 laser<\/td>\nTrong Tuan Nguyen
\nJun Hua
\nCong Chi Tran
\nVan Tuu Nguyen
\nQuoc Huy To
\nTat Thang Nguyen
\nBei Long Zhang,<\/td>\n		169<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u1ee8NG D\u1ee4NG M\u1ed8T S\u1ed0 M\u00c3 V\u1ea0CH ADN
\nTRONG NH\u1eacN DI\u1ec6N TH\u00d4NG XU\u00c2N NHA
\n(Pinus cernua<\/em> L. K. Phan ex Aver., K. S. Nguyen & T. H. Nguyen)<\/p>\n

<\/a>Ph\u00ed H\u1ed3ng H\u1ea3i1<\/sup>, Ho\u00e0ng V\u0103n S\u00e2m2<\/sup>, H\u00e0 V\u0103n Hu\u00e2n2<\/sup>, B\u00f9i Th\u1ecb Mai H\u01b0\u01a1ng2<\/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

Th\u00f4ng xu\u00e2n nha (Pinus cernua<\/em> L. K. Phan ex Aver., K. S. Nguyen & T. H. Nguyen) l\u00e0 lo\u00e0i c\u00e2y \u0111\u1eb7c h\u1eefu \u1edf Khu b\u1ea3o t\u1ed3n thi\u00ean nhi\u00ean Xu\u00e2n Nha v\u00e0 \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 l\u00e0 R\u1ea5t nguy c\u1ea5p (CR) theo c\u00e1c ti\u00eau ch\u00ed B1ab (iii), B2ab (iii), C1, C2a (ii) c\u1ee7a IUCN.<\/p>\n

Trong nghi\u00ean c\u1ee9u n\u00e0y, hai \u0111o\u1ea1n m\u00e3 v\u1ea1ch AND g\u1ed3m \u0111o\u1ea1n gen mat<\/em>K v\u00e0 trn<\/em>H-psb<\/em>A \u0111\u00e3 \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn \u0111\u1ec3 nghi\u00ean c\u1ee9u tr\u00ean \u0111\u1ed1i t\u01b0\u1ee3ng c\u00e2y Th\u00f4ng xu\u00e2n nha. K\u1ebft qu\u1ea3 l\u00e0 \u0111\u00e3 t\u00e1ch chi\u1ebft \u0111\u01b0\u1ee3c AND t\u1ed5ng s\u1ed1 t\u1eeb c\u00e1c m\u1eabu Th\u00f4ng xu\u00e2n nha \u0111\u1ea3m b\u1ea3o y\u00eau c\u1ea7u \u0111\u1ec3 l\u00e0m khu\u00f4n cho vi\u1ec7c nh\u00e2n b\u1ea3n c\u00e1c \u0111o\u1ea1n m\u00e3 v\u1ea1ch AND. K\u1ebft qu\u1ea3 PCR nh\u00e2n b\u1ea3n th\u00e0nh c\u00f4ng \u0111o\u1ea1n gen mat<\/em>K v\u00e0 trn<\/em>H-psb<\/em>A v\u1edbi c\u00e1c b\u0103ng \u0111i\u1ec7n di AND s\u1eafc n\u00e9t, \u0111\u1eb7c hi\u1ec7u. C\u00e1c \u0111o\u1ea1n m\u00e3 v\u1ea1ch AND \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh v\u00e0 ph\u00e2n t\u00edch tr\u00ecnh t\u1ef1 nucleotide b\u1eb1ng c\u00e1c ph\u1ea7n m\u1ec1m chuy\u00ean d\u1ee5ng, k\u1ebft qu\u1ea3 cho bi\u1ebft: \u0110o\u1ea1n gen mat<\/em>K c\u00f3 k\u00edch th\u01b0\u1edbc l\u00e0 802 bp, \u0111o\u1ea1n trn<\/em>H-pbs<\/em>A c\u00f3 k\u00edch th\u01b0\u1edbc 555 bp. C\u0103n c\u1ee9 v\u00e0o kho\u1ea3ng c\u00e1ch di truy\u1ec1n v\u00e0 c\u00e2y quan h\u1ec7 di truy\u1ec1n cho th\u1ea5y lo\u00e0i Th\u00f4ng xu\u00e2n nha c\u00f3 quan h\u1ec7 di truy\u1ec1n g\u1ea7n nh\u1ea5t v\u1edbi lo\u00e0i Th\u00f4ng p\u00e0 c\u00f2 (Pinus kwangtungensis<\/em>) v\u00e0 Th\u00f4ng tr\u1eafng h\u1ea3i nam (Pinus fenzeliana)<\/em> v\u1edbi kho\u1ea3ng c\u00e1ch di truy\u1ec1n l\u00e0 0,00, ti\u1ebfp \u0111\u1ebfn l\u00e0 lo\u00e0i Th\u00f4ng ba l\u00e1 (Pinus<\/em> kesiya)<\/em> c\u00f3 kho\u1ea3ng c\u00e1ch di truy\u1ec1n l\u00e0 1,13, Th\u00f4ng hai l\u00e1 d\u1eb9t (Pinus krempfii) <\/em>c\u00f3 kho\u1ea3ng c\u00e1ch di truy\u1ec1n l\u00e0 1,14 v\u00e0 ti\u1ebfp \u0111\u1ebfn l\u00e0 lo\u00e0i Th\u00f4ng \u0111\u00e0 l\u1ea1t (Pinus dalatensis)<\/em> c\u00f3 kho\u1ea3ng c\u00e1ch di truy\u1ec1n l\u00e0 1,17. \u0110o\u1ea1n gen mat<\/em>K c\u00f3 \u0111\u1ed9 t\u01b0\u01a1ng \u0111\u1ed3ng 100% v\u1edbi nhi\u1ec1u lo\u00e0i th\u00f4ng kh\u00e1c n\u00ean kh\u00f4ng th\u1ec3 s\u1eed d\u1ee5ng \u0111o\u1ea1n gen mat<\/em>K n\u00e0y \u0111\u1ec3 l\u00e0m m\u00e3 v\u1ea1ch AND cho vi\u1ec7c gi\u00e1m \u0111\u1ecbnh lo\u00e0i Th\u00f4ng xu\u00e2n nha, c\u00f2n \u0111o\u1ea1n trn<\/em>H-psb<\/em>A l\u1ea1i c\u00f3 kh\u1ea3 n\u0103ng ph\u00e2n bi\u1ec7t lo\u00e0i Th\u00f4ng xu\u00e2n nha v\u1edbi c\u00e1c lo\u00e0i th\u00f4ng kh\u00e1c kh\u00e1 t\u1ed1t, nh\u01b0ng v\u1eabn t\u01b0\u01a1ng \u0111\u1ed3ng 100% so v\u1edbi lo\u00e0i Th\u00f4ng Pinus kwangtungensis<\/em>. V\u00ec v\u1eady, \u0111\u1ec3 ph\u00e2n bi\u1ec7t \u0111\u01b0\u1ee3c Th\u00f4ng xu\u00e2n nha v\u00e0 lo\u00e0i th\u00f4ng Pinus kwangtungensis<\/em> c\u1ea7n x\u00e1c \u0111\u1ecbnh th\u00eam m\u1ed9t s\u1ed1 \u0111o\u1ea1n m\u00e3 v\u1ea1ch AND kh\u00e1c \u0111\u1ec3 t\u00ecm ra \u0111o\u1ea1n \u0111\u1eb7c tr\u01b0ng cho lo\u00e0i Th\u00f4ng xu\u00e2n nha.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Th\u00f4ng xu\u00e2n nha, Pinus cernua, <\/em>m\u00e3 v\u1ea1ch AND, quan h\u1ec7 di truy\u1ec1n<\/td>\n<\/tr>\n

<\/a>Application of DNA barcode in identification of Pinus cernua<\/em> L. K. Phan ex Aver., K. S. Nguyen & T. H. Nguyen<\/p>\n

Pinus cernua<\/em> L. K. Phan ex Aver., K. S. Nguyen & T. H. Nguyen is endemic to Xuan Nha Nature Reserve and is considered Critically endangered (CR) according to the B1ab (iii), B2ab(iii), C1, C2a(ii) criteria of the IUCN. In this study, two DNA barcodes including the gene segments of mat<\/em>K and trn<\/em>H-psb<\/em>A were selected for study on identification, discrimination and discovery of this new species. The DNA barcodes were amplified from total DNA of Pinus cernua<\/em> by PCR technique. The PCR products indicated that all the bands have the size similar to the theoretical size of mat<\/em>K and trn<\/em>H-psb<\/em>A. Results of nucleotide sequencing of PCR product samples showed that the size of the isolated mat<\/em>K gene fragment was 802 bp and trn<\/em>H-psb<\/em>A fragment was 555 bp. These sequences were compared with other pine in NCBI we found that genetic distance between Pinus cernua<\/em> and Pinus kwangtungensis<\/em> was 0.00, and then Pinus cernua<\/em> and Pinus kesiya, Pinus krempfii, Pinus dalatensis<\/em> were 1.13, 1.14, 1.17, respectively. The mat<\/em>K gene fragment was 100% similar to many other common species of pine, so it is not possible to use this mat<\/em>K gene fragment as a DNA barcode for the identification of Pinus cernua<\/em>, while the trn<\/em>H-psb<\/em>A segment is capable of distinguishing Pinus cernua<\/em> from other common species of pine, but still had 100% similar to Pinus kwangtungensis<\/em>. Therefore, in order to identify the Pinus cernua<\/em> and Pinus kwangtungensis<\/em>, it is necessary to study some more other DNA barcodes to find out the specific identification for the species.<\/p>\n

Keywords:<\/em><\/strong> Pinus cernua, <\/em>DNA barcode, genetic distance<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u0110\u00c1NH GI\u00c1 \u0110A D\u1ea0NG DI TRUY\u1ec0N V\u00c0 NH\u1eacN D\u1ea0NG NGU\u1ed2N GEN
\nC\u00c2Y \u01af\u01a0I (Scaphium macropodum<\/em> (Miq))<\/em> \u00a0B\u1eb0NG CH\u1ec8 TH\u1eca PH\u00c2N T\u1eec<\/p>\n

<\/a>Tr\u1ea7n Th\u1ecb Thu H\u00e01*<\/sup>, Ph\u1ea1m \u0110\u00ecnh S\u00e2m2<\/sup>, H\u00e0 Th\u1ecb Huy\u1ec1n Ng\u1ecdc1<\/sup>, Nguy\u1ec5n Th\u1ecb Huy\u1ec1n1
\n<\/sup>L\u00ea Th\u1ecb Th\u1ee7y1<\/sup>, Nguy\u1ec5n Th\u1ecb Vi\u1ec7t H\u00e01<\/sup>, Mai Th\u1ecb Ph\u01b0\u01a1ng Th\u00fay1<\/sup>, Nguy\u1ec5n H\u1eefu Th\u1ecbnh2<\/sup>
\nHo\u00e0ng Th\u1ecb Nhung2<\/sup>, H\u1ed3 Trung L\u01b0\u01a1ng2<\/sup>, L\u00ea S\u01a1n1<\/sup><\/p>\n

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

C\u00e2y \u01af\u01a1i (Scaphium macropodum<\/em> (Miq)) <\/em>l\u00e0 lo\u00e0i c\u00e2y \u0111a t\u00e1c d\u1ee5ng, sinh tr\u01b0\u1edfng nhanh v\u00e0 r\u1ea5t c\u00f3 gi\u00e1 tr\u1ecb \u1edf Vi\u1ec7t Nam. Tuy nhi\u00ean, vi\u1ec7c khai th\u00e1c c\u00e2y \u01af\u01a1i b\u1eb1ng h\u00ecnh th\u1ee9c ch\u1eb7t c\u00e0nh \u0111ang ph\u1ed5 bi\u1ebfn hi\u1ec7n nay khi\u1ebfn cho lo\u00e0i n\u00e0y \u0111\u1ee9ng tr\u01b0\u1edbc nguy c\u01a1 b\u1ecb \u0111e d\u1ecda. Trong nghi\u00ean c\u1ee9u n\u00e0y, ch\u00fang t\u00f4i s\u1eed d\u1ee5ng ch\u1ec9 th\u1ecb ITS \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 \u0111a d\u1ea1ng di truy\u1ec1n c\u1ee7a 25 c\u00e2y tr\u1ed9i \u01af\u01a1i \u0111\u01b0\u1ee3c thu th\u1eadp t\u1eeb c\u00e1c t\u1ec9nh Qu\u1ea3ng Nam, Qu\u1ea3ng Ng\u00e3i v\u00e0 Th\u1eeba Thi\u00ean Hu\u1ebf. K\u1ebft qu\u1ea3 cho th\u1ea5y tr\u00ecnh t\u1ef1 nucleotide gen ITS c\u1ee7a c\u00e1c m\u1eabu nghi\u00ean c\u1ee9u c\u00f3 s\u1ef1 t\u01b0\u01a1ng \u0111\u1ed3ng cao t\u1eeb 94,01% \u0111\u1ebfn 94,46% khi so v\u1edbi m\u1eabu tham chi\u1ebfu Scaphium lychnophorum <\/em>AY083663.1. <\/em>M\u1ee9c \u0111\u1ed9 t\u01b0\u01a1ng \u0111\u1ed3ng di truy\u1ec1n v\u1ec1 tr\u00ecnh t\u1ef1 nucleotide gen ITS c\u1ee7a c\u00e1c m\u1eabu \u01af\u01a1i nghi\u00ean c\u1ee9u r\u1ea5t cao t\u1eeb 97,96% \u0111\u1ebfn 99,85%. D\u1ef1a v\u00e0o c\u00e2y quan h\u1ec7 ph\u00e1t sinh, 25 c\u00e2y tr\u1ed9i \u01af\u01a1i trong nghi\u00ean c\u1ee9u v\u00e0 m\u1eabu tham chi\u1ebfu \u0111\u01b0\u1ee3c chia l\u00e0m hai nh\u00f3m ch\u00ednh. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u n\u00e0y cung c\u1ea5p th\u00eam c\u01a1 s\u1edf khoa h\u1ecdc cho vi\u1ec7c khai th\u00e1c h\u1ee3p l\u00fd \u0111\u1ed3ng th\u1eddi g\u1eafn v\u1edbi vi\u1ec7c b\u1ea3o t\u1ed3n ngu\u1ed3n gen lo\u00e0i c\u00e2y b\u1ea3n \u0111\u1ecba quan tr\u1ecdng n\u00e0y.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> C\u00e2y \u01af\u01a1i, ch\u1ec9 th\u1ecb ITS, \u0111a d\u1ea1ng di truy\u1ec1n, ngu\u1ed3n gen<\/td>\n<\/tr>\n

<\/a>Genetic diversity assessment and genetic resources indentification of (Scaphium macropodum<\/em> (Miq) using moleculer markers<\/p>\n

Scaphium macropodum<\/em> is a multi-purpose species that grows fast and is very valuable in Vietnam. However, the exploitation of this species by cutting branches is popular at present, triggering this species for being in danger of being threatened. Therefore, in this study, we have used the ITS marker to sequencing and have identified 25 sequence segments of 25 leaf samples of S. macropodum<\/em> collected from Quang Nam, Quang Ngai and Thua Thien Hue provinces that have similarities in the range from 94.01% to 94.46% with reference sample AY083663.1 Scaphium lychnophorum<\/em>. At the same time, research results have also determined that the genetic similarity of the nucleotide sequence of the samples is very high (ranging from 97.96 – 99.85%). Based on the phylogenetic tree, 25 S. macropodum <\/em>samples in the study and the reference sample were divided into two main groups. The results of this study are very important for the proper exploitation and the conservation of the genetic resources of this important indigenous plant species as well.<\/p>\n

Keywords:<\/em><\/strong> Genetic diversity, gene resources, ITS (Internal Transcribed Spacer) marker, Scaphium macropodum<\/em><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U NH\u00c2N GI\u1ed0NG C\u00c1C D\u00d2NG KEO LAI N\u0102NG SU\u1ea4T CAO BV376, BV586, BB055 B\u1eb0NG PH\u01af\u01a0NG PH\u00c1P NU\u00d4I C\u1ea4Y M\u00d4<\/p>\n

<\/a>V\u0103n Thu Huy\u1ec1n1<\/sup>, Mai Th\u1ecb Ph\u01b0\u01a1ng Th\u00fay1<\/sup>, \u0110\u1ed3ng Th\u1ecb \u01afng1<\/sup>, Nguy\u1ec5n Anh D\u0169ng1<\/sup>
\nL\u00ea Th\u1ecb Hoa1<\/sup>, L\u01b0u Th\u1ecb Qu\u1ef3nh1<\/sup>, Ho\u00e0ng Th\u1ecb H\u1ed3ng H\u1ea1nh1<\/sup>, \u0110\u1ed7 H\u1eefu S\u01a1n1
\n<\/sup>Nguy\u1ec5n \u0110\u1ee9c Ki\u00ean1<\/sup>, \u0110\u1ed7 Ti\u1ebfn Ph\u00e1t2<\/sup>, L\u00ea S\u01a1n1<\/sup><\/p>\n

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

Trong th\u1eddi gian g\u1ea7n \u0111\u00e2y, m\u1ed9t s\u1ed1 gi\u1ed1ng keo lai c\u00f3 n\u0103ng su\u1ea5t, ch\u1ea5t l\u01b0\u1ee3ng cao \u0111\u00e3 \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u ch\u1ecdn t\u1ea1o nh\u1eb1m b\u1ed5 sung ngu\u1ed3n gi\u1ed1ng c\u00f3 ph\u1ea9m ch\u1ea5t di truy\u1ec1n \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n cho c\u01a1 c\u1ea5u c\u00e2y tr\u1ed3ng r\u1eebng. \u0110\u1ec3 ph\u00e1t tri\u1ec3n c\u00e1c gi\u1ed1ng n\u00e0y v\u00e0o s\u1ea3n xu\u1ea5t, vi\u1ec7c nghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng b\u1eb1ng nu\u00f4i c\u1ea5y m\u00f4 l\u00e0 vi\u1ec7c l\u00e0m c\u00f3 \u00fd ngh\u0129a. Nghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng b\u1eb1ng nu\u00f4i c\u1ea5y m\u00f4 cho c\u00e1c d\u00f2ng BV376, BV586 v\u00e0 BB055 \u0111\u00e3 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n t\u1ea1i Vi\u1ec7n Nghi\u00ean c\u1ee9u Gi\u1ed1ng v\u00e0 C\u00f4ng ngh\u1ec7 Sinh h\u1ecdc, k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y: Ph\u01b0\u01a1ng ph\u00e1p kh\u1eed tr\u00f9ng th\u00edch h\u1ee3p l\u00e0 HgCl2<\/sub> n\u1ed3ng \u0111\u1ed9 0,1% trong v\u00f2ng 5 ph\u00fat cho t\u1ef7 l\u1ec7 b\u1eadt ch\u1ed3i cao nh\u1ea5t \u0111\u1ea1t 37,5%. M\u00f4i tr\u01b0\u1eddng nu\u00f4i c\u1ea5y c\u01a1 b\u1ea3n MS c\u00f3 c\u1ea3i ti\u1ebfn v\u1ec1 th\u00e0nh ph\u1ea7n v\u00e0 n\u1ed3ng \u0111\u1ed9 c\u00e1c ch\u1ea5t \u0111a l\u01b0\u1ee3ng, vi l\u01b0\u1ee3ng (MS2) c\u00f3 b\u1ed5 sung BAP n\u1ed3ng \u0111\u1ed9 1,5 mg\/l v\u00e0 NAA 0,5 mg\/l cho t\u1ef7 l\u1ec7 nh\u00e2n ch\u1ed3i cao (h\u1ec7 s\u1ed1 nh\u00e2n ch\u1ed3i \u0111\u1ea1t t\u1eeb 4,9 – 5,8), ch\u1ea5t l\u01b0\u1ee3ng ch\u1ed3i t\u1ed1t. M\u00f4i tr\u01b0\u1eddng 1\/2MS2 c\u00f3 b\u1ed5 sung IBA n\u1ed3ng \u0111\u1ed9 1,5 – 2,0 mg\/l cho t\u1ef7 l\u1ec7 ra r\u1ec5 tr\u00ean 80%. K\u1ebft qu\u1ea3 n\u00e0y l\u00e0 c\u01a1 s\u1edf quan tr\u1ecdng cho vi\u1ec7c x\u00e2y d\u1ef1ng quy tr\u00ecnh nh\u00e2n gi\u1ed1ng b\u1eb1ng nu\u00f4i c\u1ea5y m\u00f4 cho c\u00e1c d\u00f2ng keo lai m\u1edbi ch\u1ecdn t\u1ea1o t\u1eeb \u0111\u00f3 ti\u1ebfn h\u00e0nh c\u00f4ng t\u00e1c chuy\u1ec3n giao gi\u1ed1ng v\u00e0 quy tr\u00ecnh nh\u00e2n gi\u1ed1ng cho c\u00e1c \u0111\u01a1n v\u1ecb nghi\u00ean c\u1ee9u v\u00e0 s\u1ea3n xu\u1ea5t gi\u1ed1ng c\u00e2y l\u00e2m nghi\u1ec7p \u0111\u1ec3 ph\u00e1t tri\u1ec3n c\u00e1c gi\u1ed1ng m\u1edbi n\u00e0y v\u00e0o tr\u1ed3ng r\u1eebng s\u1ea3n xu\u1ea5t.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> keo lai, nh\u00e2n ch\u1ed3i, nh\u00e2n gi\u1ed1ng in vitro<\/em>, nu\u00f4i c\u1ea5y m\u00f4, ra r\u1ec5<\/td>\n<\/tr>\n

<\/a>In vitro<\/em> micropropagation for newly seleted acacia hybrid clones BV376, BV586 v\u00e0 BB055<\/p>\n

Recently, a number of high-yield acacia hybrid clones have been researched and selected to improve genetic quality for forest plantation. To develop these varieties into production, research on propagation by tissue culture is necessary. Research on propagation by tissue culture for acacia hybrid clones BV376, BV586 and BB055 was carried out at the Institute of Forest Tree Improvement and Biotechnology. The research results showed that the optimal method for bud sterilization was soaked in HgCl2<\/sub> 0.1% for 5 minutes that gave the highest budding rate of 37.5%. The basal culture medium Murashige and Skoog (MS) with improved composition and concentration of macro-nutrients and micro-nutrients (MS2) with 1.5 mg\/l BAP and 0.5 mg\/l NAA for high shoot multiplication (4.9 – 5.8 shoots per clump). The 1\/2MS2 medium + IBA concentration of 1.5 – 2.0 mg\/l produced over 80% of rooted shoots. This result provides an important basis for a propagation process by tissue culture for newly selected acacia hybrid lines.<\/p>\n

Keywords:<\/em><\/strong> acacia hybrid, in vitro<\/em> propagation, multi-shoot, rooting, tissue culture<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U NH\u00c2N GI\u1ed0NG C\u00c1C D\u00d2NG KEO LAI M\u1edaI
\n(Acacia mangium Acacia auriculiformis<\/em>) BV350 V\u00c0 BV523
\nB\u1eb0NG PH\u01af\u01a0NG PH\u00c1P NU\u00d4I C\u1ea4Y M\u00d4 T\u1ebe B\u00c0O<\/p>\n

<\/a>T\u1ea1 Thu Trang1<\/sup>, Khu\u1ea5t Th\u1ecb H\u1ea3i Ninh2<\/sup>, \u0110\u1ed7 H\u1eefu S\u01a1n1<\/sup>, C\u1ea5n Th\u1ecb Lan1
\n<\/sup>Ki\u1ec1u Th\u1ecb H\u00e01<\/sup>, Nguy\u1ec5n Th\u1ecb Thu Dung1<\/sup><\/p>\n

1<\/sup>Trung t\u00e2m Th\u1ef1c nghi\u1ec7m v\u00e0 Chuy\u1ec3n giao Gi\u1ed1ng c\u00e2y r\u1eebng,
\nVi\u1ec7n Nghi\u00ean c\u1ee9u Gi\u1ed1ng v\u00e0 C\u00f4ng ngh\u1ec7 Sinh h\u1ecdc L\u00e2m nghi\u1ec7p
\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 nh\u00e2n gi\u1ed1ng c\u00e1c d\u00f2ng keo lai m\u1edbi (Acacia mangium<\/em> \u00b4 Acacia auriculiformis<\/em>) BV350 v\u00e0 BV523 b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p nu\u00f4i c\u1ea5y m\u00f4 t\u1ebf b\u00e0o s\u1ebd g\u00f3p ph\u1ea7n ho\u00e0n hi\u1ec7n quy tr\u00ecnh ch\u1ecdn t\u1ea1o gi\u1ed1ng keo lai m\u1edbi. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p nu\u00f4i c\u1ea5y m\u00f4 hai d\u00f2ng keo lai m\u1edbi cho th\u1ea5y vi\u1ec7c s\u1eed d\u1ee5ng ch\u1ed3i v\u01b0\u1ee3t hay ch\u1ed3i n\u00e1ch l\u00e0m v\u1eadt li\u1ec7u v\u00e0o m\u1eabu, kh\u1eed tr\u00f9ng b\u1eb1ng HgCl2<\/sub> 0,1% trong th\u1eddi gian 7 ph\u00fat cho hi\u1ec7u qu\u1ea3 cao nh\u1ea5t: t\u1ef7 l\u1ec7 m\u1eabu s\u1ea1ch n\u1ea3y ch\u1ed3i (HSNC) h\u1eefu hi\u1ec7u \u1edf hai d\u00f2ng keo lai BV350 v\u00e0 BV523 l\u1ea7n l\u01b0\u1ee3t l\u00e0 40,4% v\u00e0 42,6%. Tuy nhi\u00ean, vi\u1ec7c s\u1eed d\u1ee5ng javen 3 – 5% trong th\u1eddi gian 7 ph\u00fat c\u0169ng cho hi\u1ec7u qu\u1ea3 kh\u00e1 t\u1ed1t v\u1edbi t\u1ef7 l\u1ec7 m\u1eabu s\u1ea1ch n\u1ea3y ch\u1ed3i h\u1eefu hi\u1ec7u \u1edf hai d\u00f2ng keo lai m\u1edbi l\u1ea7n l\u01b0\u1ee3t l\u00e0 31,9% v\u00e0 33,7%. \u0110\u1ec3 gi\u1ea3m b\u1edbt \u0111\u1ed9c h\u1ea1i cho ng\u01b0\u1eddi d\u00f9ng v\u00e0 cho m\u00f4i tr\u01b0\u1eddng th\u00ec vi\u1ec7c d\u00f9ng javel trong kh\u1eed tr\u00f9ng \u0111\u01b0\u1ee3c khuy\u1ebfn k\u00edch h\u01a1n l\u00e0 d\u00f9ng HgCl2<\/sub> m\u1eb7c d\u00f9 hi\u1ec7u qu\u1ea3 k\u00e9m h\u01a1n. C\u00e1c ch\u1ed3i h\u1eefu hi\u1ec7u \u0111\u01b0\u1ee3c t\u00e1i sinh trong m\u00f4i tr\u01b0\u1eddng Murashige v\u00e0 Skoog c\u1ea3i ti\u1ebfn (MS*) c\u00f3 b\u1ed5 sung 1 mg\/l BAP. H\u1ec7 s\u1ed1 nh\u00e2n ch\u1ed3i cao nh\u1ea5t \u0111\u1ea1t \u0111\u01b0\u1ee3c trong m\u00f4i tr\u01b0\u1eddng MS* +1,0 mg\/l BAP + 0,5 mg\/l kinetin (BV350 c\u00f3 HSNC: 2,66 l\u1ea7n; BV523 c\u00f3 HSNC: 2,78 l\u1ea7n). T\u1ef7 l\u1ec7 ch\u1ed3i h\u1eefu hi\u1ec7u cao nh\u1ea5t \u0111\u1ea1t \u0111\u01b0\u1ee3c trong m\u00f4i tr\u01b0\u1eddng MS* + 1,0 mg\/l BAP + 0,5 mg\/l Kn + 1,0g\/l AC (d\u00f2ng keo lai BV350 c\u00f3 t\u1ef7 l\u1ec7 ch\u1ed3i h\u1eefu hi\u1ec7u v\u00e0 chi\u1ec1u cao c\u1ee7a ch\u1ed3i l\u1ea7n l\u01b0\u1ee3t l\u00e0 87% v\u00e0 3,75 cm; BV523 c\u00f3 t\u1ef7 l\u1ec7 ch\u1ed3i h\u1eefu hi\u1ec7u v\u00e0 chi\u1ec1u cao c\u1ee7a ch\u1ed3i l\u1ea7n l\u01b0\u1ee3t l\u00e0 88% v\u00e0 3,7 cm). Ch\u1ed3i h\u1eefu hi\u1ec7u \u0111\u1ea1t ti\u00eau chu\u1ea9n \u0111\u01b0\u1ee3c ra r\u1ec5 trong m\u00f4i tr\u01b0\u1eddng 1\/2MS* + 2 mg\/l IBA, t\u1ef7 l\u1ec7 ra r\u1ec5 \u0111\u1ea1t 86,7% v\u00e0 92,2% v\u1edbi hai d\u00f2ng keo lai t\u01b0\u01a1ng \u1ee9ng. Th\u1eddi gian hu\u1ea5n luy\u1ec7n 7 ng\u00e0y cho t\u1ef7 l\u1ec7 c\u00e2y con s\u1ed1ng \u1edf ngo\u00e0i v\u01b0\u1eddn \u01b0\u01a1m cao v\u1edbi hai d\u00f2ng keo lai l\u1ea7n l\u01b0\u1ee3t l\u00e0 84,4% v\u00e0 82,2%.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> keo lai, nu\u00f4i c\u1ea5y m\u00f4<\/td>\n<\/tr>\n

<\/a>Study on propagation of new acacia hybrid clones (Acacia mangium <\/em>\u00b4 Acacia auriculiformis<\/em>) BV350 and BV523 by tissue culture method<\/p>\n

Study on propagating of new acacia hybrid clones (Acacia mangium \u00b4 <\/strong>Acacia auriculiformis) BV350 and BV523 by tissue culture method was investigated. The results has a the potential to contribute to completing the process of selecting and creating new acacia hybrids. The results of propagation by tissue culture method of two new acacia hybrid lines showed that the use of overshoot or axillary buds as the sample material, sterilization with 0.1% HgCl2<\/sub> for 7 minutes provided the highest efficiency. The effective budding (HSNC) of two acacia hybrid lines BV350 and BV523 were 40.4% and 42.6%, respectively. However, the use of 3 – 5% javen for 7 minutes also gave good results with the effective percentage of clean samples budding of two new acacia hybrid lines were 31.9% and 33.7%, respectively. To reduce toxicity to users and the environment, the use of javel in disinfection is recommended over HgCl2<\/sub> although less effective. Effective shoots were regenerated in modified Murashige and Skoog medium (MS*) supplemented with 1 mg\/l BAP. The highest shoot multiplication coefficient was obtained in MS* + 1.0 mg\/l BAP + 0.5 mg\/l kinetin medium (BV350 has HSNC: 2,66 times; BV523 has HSNC: 2,78 times). The highest effective shoot ratio was obtained in MS* + 1.0 mg\/l BAP + 0.5 mg\/l Kn + 1.0 g\/l AC medium (The effective shoot ratio and height of shoots of acacia hybrid BV350 were 87% and 3.75 cm, respectively; BV523 had effective shoot ratio and shoot height of 88% and 3.7 cm, respectively). Qualified effective shoots were rooted in 1\/2MS* + 2 mg\/l IBA medium, the rooting rate was 86.7% and 92.2% with two acacia hybrid lines respectively. The training time at 7 days gave a high percentage of seedlings survival. The survival rate of BV350 and BV523 lines was 84.4% and 82.2%, respectively.<\/p>\n

Keywords:<\/em><\/strong> acacia hybrid, tissue culture<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U \u0110\u1eb6C \u0110I\u1ec2M SINH L\u00dd H\u1ea0T GI\u1ed0NG V\u00c0 K\u1ef8 THU\u1eacT
\nNH\u00c2N GI\u1ed0NG C\u00c2Y S\u1ea4U T\u00cdA (Sandoricum indicum<\/em> Cav.) T\u1eea H\u1ea0T<\/p>\n

<\/a>Nguy\u1ec5n Ki\u00ean C\u01b0\u1eddng1<\/sup>, \u0110\u1ed7 Th\u1ecb Ng\u1ecdc H\u00e01<\/sup>, Ph\u00f9ng V\u0103n T\u1ec9nh1<\/sup>,
\nV\u00f5 \u0110\u1ea1i H\u1ea3i2<\/sup>, Nguy\u1ec5n Minh Thanh3<\/sup><\/p>\n

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

B\u00e0i b\u00e1o gi\u1edbi thi\u1ec7u k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u \u0111\u1eb7c \u0111i\u1ec3m sinh l\u00fd h\u1ea1t gi\u1ed1ng, k\u1ef9 thu\u1eadt nh\u00e2n gi\u1ed1ng c\u00e2y S\u1ea5u t\u00eda (<\/strong>Sandoricum indicum<\/em> Cav.) t\u1eeb h\u1ea1t. V\u1ec1 \u0111\u1eb7c \u0111i\u1ec3m sinh l\u00fd h\u1ea1t gi\u1ed1ng: qu\u1ea3 S\u1ea5u t\u00eda r\u1ed9ng 40,2 mm v\u00e0 d\u00e0i 48,6 mm, kh\u1ed1i l\u01b0\u1ee3ng 1.000 qu\u1ea3 l\u00e0 47,67 kg, 1 qu\u1ea3 c\u00f3 3 \u0111\u1ebfn 5 h\u1ea1t; h\u1ea1t S\u1ea5u t\u00eda d\u00e0i 24,8 mm, r\u1ed9ng 13,6 mm, d\u00e0y 10,7 mm; kh\u1ed1i l\u01b0\u1ee3ng 1.000 h\u1ea1t l\u00e0 1.829 g; \u0111\u1ed9 \u1ea9m c\u1ee7a h\u1ea1t S\u1ea5u t\u00eda 43,2%, thu\u1ed9c nh\u00f3m h\u1ea1t c\u00f3 \u0111\u1ed9 \u1ea9m cao, h\u1ea1t m\u1ea5t s\u1ee9c n\u1ea3y m\u1ea7m nhanh. X\u1eed l\u00fd h\u1ea1t n\u1ea3y n\u1ea7m t\u1ed1t nh\u1ea5t l\u00e0 ng\u00e2m n\u01b0\u1edbc th\u01b0\u1eddng (22o<\/sup>C) trong 24 gi\u1edd cho t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m c\u1ee7a h\u1ea1t m\u1edbi thu h\u00e1i 97,8% v\u00e0 th\u1ebf n\u1ea3y m\u1ea7m l\u00e0 35,5%, th\u1eddi gian n\u1ea3y m\u1ea7m c\u1ee7a h\u1ea1t t\u1eadp trung 8 – 10 ng\u00e0y; h\u1ea1t b\u1ea3o qu\u1ea3n th\u01b0\u1eddng \u1edf trong ph\u00f2ng (22 – 270<\/sup> C) l\u00e0 bi\u1ec7n ph\u00e1p b\u1ea3o qu\u1ea3n h\u1ea1t t\u1ed1t nh\u1ea5t, th\u1eddi gian t\u1ed1i \u0111a \u0111\u01b0\u1ee3c 3 – 4 th\u00e1ng. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u gieo \u01b0\u01a1m c\u00e2y con S\u1ea5u t\u00eda trong b\u1ea7u PE c\u00f3 \u0111\u00e1y k\u00edch th\u01b0\u1edbc 17 \u00b4 <\/strong>22 cm sau 11 th\u00e1ng v\u1edbi h\u1ed7n h\u1ee3p ru\u1ed9t b\u1ea7u 48% \u0111\u1ea5t t\u1ea7ng A + 2% ph\u00e2n vi sinh s\u00f4ng Gianh + 50% m\u00f9n c\u01b0a v\u00e0 kh\u00f4ng che s\u00e1ng cho k\u1ebft qu\u1ea3 t\u1ed1t nh\u1ea5t, \u0111\u1ea1t \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c 12,3 mm, chi\u1ec1u cao c\u00e2y 119,7 cm, t\u1ef7 l\u1ec7 s\u1ed1ng 91,6%.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Sinh l\u00fd h\u1ea1t gi\u1ed1ng, nh\u00e2n gi\u1ed1ng t\u1eeb h\u1ea1t, c\u00e2y S\u1ea5u t\u00eda<\/td>\n<\/tr>\n

<\/a>Research on physiological characteristics of seeds and propagation techniques of Sandoricum indicum<\/em> Cav. from seeds<\/p>\n

This paper presents the results of research on physiological characteristics of seeds and propagation techniques of Sandoricum indicum<\/em> Cav. from seeds. In terms of seed physiology: fruit size is 40.2 mm wide and 48.6 mm long, the weight of 1,000 fruits is 47.67 kg, 1 fruit has 3 to 5 seeds; medium size of seed attains 24.8 mm, 13.6 mm, 10.7 mm in length, width and thickness respectively; the heaviness of 1,000 seeds weighs 1,829 g; with the moisture content of seed of 43.2%, belongs to high humidity group, seeds lose their germination quickly; The best treatment for germination is soaking in normal water (22o<\/sup>C) in 24 hours for the germination rate of newly harvested seeds of 97.8% and germination energy of 35.5%, the germination period spans 8 – 10 days; Seed storage in room with nomal temperature (22 – 270 C) to be the best method to preserve seeds with maximum period of 5 months. Research outcome of sowing seedlings in PE bags size of 17 cm \u00b4 <\/strong>22 cm after 11 months with a mixture of substrate 48% soil A layer + 2% Gianh river microbial fertilizer + 50% sawdust without covering the light provides the best result, reaching 12.3 mm of stump diameter, 119.7 cm of tree height and a survival rate of 91.6%.<\/p>\n

Keywords:<\/em><\/strong> Physiological characteristics of seeds, propagation techniques from seeds, Sandoricum indicum<\/em> Cav.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U K\u1ef8 THU\u1eacT NH\u00c2N GI\u1ed0NG
\nC\u00c2Y \u01af\u01a0I (Scaphium macropodum <\/em>(Miq)) B\u1eb0NG PH\u01af\u01a0NG PH\u00c1P GH\u00c9P<\/p>\n

<\/a>\u0110o\u00e0n \u0110\u00ecnh Tam, Nguy\u1ec5n Th\u00f9y M\u1ef9 Linh, H\u00e0 \u0110\u00ecnh Long, Tr\u1ea7n Th\u1ecb H\u1ea3i<\/p>\n

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

\u01af\u01a1i (Scaphium macropodum)<\/em> l\u00e0 c\u00e2y b\u1ea3n \u0111\u1ecba \u0111a t\u00e1c d\u1ee5ng v\u00e0 c\u00f3 gi\u00e1 tr\u1ecb kinh t\u1ebf nh\u01b0ng chu k\u1ef3 ra qu\u1ea3 d\u00e0i (4 – 5 n\u0103m), h\u1ea1t m\u1ea5t s\u1ee9c n\u1ea3y m\u1ea7m nhanh n\u00ean vi\u1ec7c ch\u1ee7 \u0111\u1ed9ng ngu\u1ed3n gi\u1ed1ng ph\u1ee5c v\u1ee5 tr\u1ed3ng r\u1eebng g\u1eb7p nhi\u1ec1u kh\u00f3 kh\u0103n. Vi\u1ec7c nghi\u00ean c\u1ee9u k\u1ef9 thu\u1eadt nh\u00e2n gi\u1ed1ng \u01af\u01a1i b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p gh\u00e9p t\u1eeb nh\u1eefng g\u1ed1c gh\u00e9p v\u00e0 hom gh\u00e9p \u0111\u01b0\u1ee3c l\u1ea5y t\u1eeb c\u00e1c c\u00e2y tr\u1ed9i \u0111\u00e3 \u0111\u01b0\u1ee3c tuy\u1ec3n ch\u1ecdn s\u1ebd gi\u00fap ch\u1ee7 \u0111\u1ed9ng ngu\u1ed3n gi\u1ed1ng v\u00e0 t\u1ea1o ra \u0111\u01b0\u1ee3c ngu\u1ed3n gi\u1ed1ng t\u1ed1t, c\u00f3 xu\u1ea5t x\u1ee9 r\u00f5 r\u00e0ng. <\/em><\/strong>K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y, s\u1eed d\u1ee5ng hom gh\u00e9p c\u00f3 \u0111\u1ed9 d\u00e0i t\u1eeb 6 – 8 cm gh\u00e9p tr\u00ean g\u1ed1c gh\u00e9p c\u00f3 \u0111\u1ed9 tu\u1ed5i t\u1eeb 11 – 13 th\u00e1ng v\u00e0o v\u1ee5 Xu\u00e2n – H\u00e8 (th\u00e1ng 3 – 5) b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p gh\u00e9p n\u00eam cho hi\u1ec7u qu\u1ea3 nh\u00e2n gi\u1ed1ng cao nh\u1ea5t \u0111\u1ed1i v\u1edbi c\u00e2y \u01af\u01a1i. T\u1ea1i c\u00e1c th\u00ed nghi\u1ec7m n\u00e0y, t\u1ef7 l\u1ec7 ra ch\u1ed3i c\u1ee7a c\u00e2y gh\u00e9p \u0111\u1ea1t t\u1eeb 68,9% \u0111\u1ebfn 87%, c\u00e2y ra ch\u1ed3i s\u1edbm. Sau khi gh\u00e9p 120 ng\u00e0y, c\u00e2y sinh tr\u01b0\u1edfng t\u1ed1t khi \u0111\u01b0\u1eddng k\u00ednh ch\u1ed3i gh\u00e9p \u0111\u1ea1t t\u1eeb 1,2 – 1,3 cm, chi\u1ec1u cao ch\u1ed3i gh\u00e9p \u0111\u1ea1t t\u1eeb 23 – \u00a026,5 cm.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> C\u00e2y \u01af\u01a1i, nh\u00e2n gi\u1ed1ng, k\u1ef9 thu\u1eadt gh\u00e9p<\/td>\n<\/tr>\n

<\/a>Research on propagation of Scaphium macropodum<\/em> (Miq) utilizing grafting techniques<\/p>\n

Scaphium macropodum<\/em> is a multi-purpose and high valuable indigenous species. Nevertheless, the initiative of source seed is facing difficulties due to a long fruiting cycle (4 – 5 years) and rapid loss of seed germination. Conducting research on application of grafting techniques using grafting stocks and cuttings taken from selected plus trees will help proactively source seeds and create good seed sources with identified provenance. The research results indicated that using cuttings with a length of 6 cm – 8 cm, grafted on rootstock at the age of 11 – 13 months, in spring – summer period (March – May), and applied cleft draft technique is the most effective propagation method of Uoi. In this experiments, the survival rate and rate of sprouting shoots of grafted plants reach from 68.9% to 87% and appearance of early shoots. After 120 days of grafting, the plant grows well with the diameter of grafted shoots reaches from 1.2 cm to 1.3 cm and the height obtains 23 cm – 26.5 cm.<\/p>\n

Keywords:<\/em><\/strong> Scaphium macropodum<\/em>, propagation, grafting technique<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U \u1ea2NH H\u01af\u1edeNG C\u1ee6A TH\u1edcI V\u1ee4 TR\u1ed2NG
\n\u0110\u1ebeN SINH TR\u01af\u1edeNG C\u00c2Y L\u1ea0C TI\u00caN (Passiflora foetida<\/em>\u00a0<\/em>L.)
\nT\u1ea0I T\u1ec8NH TH\u00c1I NGUY\u00caN<\/p>\n

<\/a>Tr\u1ecbnh \u0110\u00ecnh Kh\u00e11<\/sup>, H\u00e0 Duy Tr\u01b0\u1eddng2<\/sup>, Nguy\u1ec5n Th\u1ecb Thu Hi\u1ec1n1,2*<\/sup><\/p>\n

1<\/sup>Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc Th\u1ee7y l\u1ee3i, H\u00e0 N\u1ed9i
\n2<\/sup>Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc N\u00f4ng L\u00e2m Th\u00e1i Nguy\u00ean<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

C\u00f4ng tr\u00ecnh n\u00e0y ti\u1ebfn h\u00e0nh \u0111\u00e1nh gi\u00e1 \u1ea3nh h\u01b0\u1edfng c\u1ee7a th\u1eddi v\u1ee5 tr\u1ed3ng \u0111\u1ebfn kh\u1ea3 n\u0103ng sinh tr\u01b0\u1edfng c\u1ee7a c\u00e2y L\u1ea1c ti\u00ean nh\u00e2n gi\u1ed1ng b\u1eb1ng h\u1ea1t tr\u1ed3ng t\u1ea1i Th\u00e1i Nguy\u00ean. Th\u00ed nghi\u1ec7m \u0111\u01b0\u1ee3c b\u1ed1 tr\u00ed theo kh\u1ed1i ng\u1eabu nhi\u00ean \u0111\u1ea7y \u0111\u1ee7 (RCBD) v\u1edbi 4 c\u00f4ng th\u1ee9c (CT) v\u00e0 \u0111\u01b0\u1ee3c nh\u1eafc l\u1ea1i 3 l\u1ea7n\/m\u1ed7i c\u00f4ng th\u1ee9c. Chi ti\u1ebft c\u00e1c c\u00f4ng th\u1ee9c trong th\u00ed nghi\u1ec7m nh\u01b0 sau: CT1 (tr\u1ed3ng ng\u00e0y 10\/3\/2019), CT2 (tr\u1ed3ng ng\u00e0y 25\/3\/2019), CT3 (tr\u1ed3ng ng\u00e0y 10\/4\/2019), CT4 (tr\u1ed3ng ng\u00e0y 25\/4\/2019). K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u \u0111\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c c\u00f4ng th\u1ee9c CT1 c\u00f3 chi\u1ec1u d\u00e0i th\u00e2n ch\u00ednh trung b\u00ecnh (vn<\/sub>) cao nh\u1ea5t so v\u1edbi 3 c\u00f4ng th\u1ee9c c\u00f2n l\u1ea1i; c\u00f4ng th\u1ee9c CT2 c\u00f3 \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c trung b\u00ecnh (00<\/sub>) l\u1edbn nh\u1ea5t \u1edf giai \u0111o\u1ea1n sau 7 \u0111\u1ebfn 28 ng\u00e0y tr\u1ed3ng ngo\u00e0i m\u00f4 h\u00ecnh \u0111\u1ed3ng ru\u1ed9ng v\u00e0 c\u00f4ng th\u1ee9c CT1 c\u00f3 \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c trung b\u00ecnh (00<\/sub>) l\u1edbn nh\u1ea5t \u1edf giai \u0111o\u1ea1n sau 35 ng\u00e0y tr\u1ed3ng ngo\u00e0i m\u00f4 h\u00ecnh \u0111\u1ed3ng ru\u1ed9ng; c\u00f4ng th\u1ee9c CT2 v\u00e0 CT1 l\u1ea7n l\u01b0\u1ee3t \u0111\u1ea1t gi\u00e1 tr\u1ecb t\u0103ng tr\u01b0\u1edfng chi\u1ec1u cao v\u00e0 \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c cao nh\u1ea5t; c\u00f4ng th\u1ee9c CT1 \u0111\u1ea1t sinh kh\u1ed1i t\u01b0\u01a1i\/c\u00e2y trung b\u00ecnh cao nh\u1ea5t l\u00e0 18.115,62 kg\/ha v\u00e0 sinh kh\u1ed1i c\u00e2y kh\u00f4 l\u00e0 3.211,25 kg\/ha.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> \u1ea2nh h\u01b0\u1edfng th\u1eddi v\u1ee5, L\u1ea1c ti\u00ean, Passiflora foetida<\/em> L., Th\u00e1i Nguy\u00ean<\/td>\n<\/tr>\n

<\/a>Research on the effect of planting time on the growth of Passiflora foetida<\/em> L. in Thai Nguyen province<\/p>\n

The experiment was conducted to determine the effects of planting time on the growth of Passiflora foetida<\/em> L. in Thai Nguyen province. The experiment design was a randomized complete block design (RCBD) with 4 formulas (CT) and repeated 3 times per one. The formulas in the experiment include: CT1 (planted on March 10, 2019), CT2 (planted on March 25, 2019), CT3 (planted on April 10, 2019), CT4 (planted on April 25, 2019). The results of the study have determined that, CT1 had the highest average value of main stem length (vn<\/sub>) compared to 3 left formulas; CT2 had the highest average value of diameter (00<\/sub>) at the period after 7 days to 28 days of planting in the field, while CT1 had the highest average value of diameter at the stage after 35 days of planting in the field; CT2 and CT1 achieved the highest growth values of main stem length and diameter; CT1 achieved the highest average value of fresh biomass with 18,115.62 kg\/ha and dried biomass with 3,211.25 kg\/ha.<\/p>\n

Keywords:<\/em><\/strong> Effect of planting time, Passiflora foetida<\/em>\u00a0L., Thai Nguyen province<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>SINH TR\u01af\u1edeNG V\u00c0 N\u0102NG SU\u1ea4T
\nR\u1eeaNG TR\u1ed2NG HU\u1ef6NH (Tarrietia javanica<\/em> Blume)
\n\u1ede M\u1ed8T S\u1ed0 T\u1ec8NH V\u00d9NG B\u1eaeC TRUNG B\u1ed8<\/p>\n

<\/a>V\u0169 \u0110\u1ee9c B\u00ecnh, Ph\u1ea1m Ti\u1ebfn H\u00f9ng, Ph\u1ea1m Xu\u00e2n \u0110\u1ec9nh, Nguy\u1ec5n Th\u1ecb Th\u1ea3o Trang,
\nNguy\u1ec5n H\u1ea3i Th\u00e0nh, L\u00ea C\u00f4ng \u0110\u1ecbnh, Nguy\u1ec5n Th\u1ecb Thanh Nga, H\u00e0 V\u0103n Thi\u1ec7n<\/p>\n

Trung t\u00e2m Khoa h\u1ecdc L\u00e2m nghi\u1ec7p B\u1eafc Trung B\u1ed9<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

K\u1ebft qu\u1ea3 \u0111i\u1ec1u tra, \u0111\u00e1nh gi\u00e1 16 m\u00f4 h\u00ecnh r\u1eebng tr\u1ed3ng Hu\u1ef7nh \u1edf c\u00e1c t\u1ec9nh v\u00f9ng B\u1eafc Trung B\u1ed9 cho th\u1ea5y, Hu\u1ef7nh \u0111ang \u0111\u01b0\u1ee3c tr\u1ed3ng v\u1edbi m\u1ee5c \u0111\u00edch cung c\u1ea5p g\u1ed7 l\u1edbn theo 3 ph\u01b0\u01a1ng th\u1ee9c g\u1ed3m: Tr\u1ed3ng thu\u1ea7n lo\u00e0i, tr\u1ed3ng h\u1ed7n giao v\u00e0 tr\u1ed3ng l\u00e0m gi\u00e0u r\u1eebng. Nh\u00ecn chung, t\u1ef7 l\u1ec7 s\u1ed1ng c\u00e1c m\u00f4 h\u00ecnh r\u1eebng tr\u1ed3ng Hu\u1ef7nh kh\u00f4ng cao, dao \u0111\u1ed9ng t\u1eeb 34,55% \u0111\u1ebfn 92,42%. T\u1ef7 l\u1ec7 s\u1ed1ng c\u1ee7a Hu\u1ef7nh trong c\u00e1c m\u00f4 h\u00ecnh r\u1eebng tr\u1ed3ng c\u00f3 xu h\u01b0\u1edbng gi\u1ea3m d\u1ea7n theo tu\u1ed5i. T\u1ea1i tu\u1ed5i 4, t\u1ef7 l\u1ec7 s\u1ed1ng trung b\u00ecnh c\u1ee7a Hu\u1ef7nh trong c\u00e1c m\u00f4 h\u00ecnh \u0111\u1ea1t t\u1eeb 82,13% \u0111\u1ebfn 96,0%, \u0111\u1ebfn giai \u0111o\u1ea1n 13 – 15 tu\u1ed5i t\u1ef7 l\u1ec7 s\u1ed1ng gi\u1ea3m xu\u1ed1ng c\u00f2n t\u1eeb 58,18% \u0111\u1ebfn 80,0% v\u00e0 \u0111\u1ebfn tu\u1ed5i 31 t\u1ef7 l\u1ec7 s\u1ed1ng ch\u1ec9 c\u00f2n 49,16%. Hu\u1ef7nh l\u00e0 c\u00e2y b\u1ea3n \u0111\u1ecba c\u00f3 sinh tr\u01b0\u1edfng t\u01b0\u01a1ng \u0111\u1ed1i nhanh. \u1ede c\u00e1c m\u00f4 h\u00ecnh tr\u1ed3ng thu\u1ea7n lo\u00e0i m\u1eadt \u0111\u1ed9 hi\u1ec7n t\u1ea1i t\u1eeb 380 – 1.027 c\u00e2y\/ha; (rD1,3<\/sub>) t\u1eeb 0,88 – 1,64 cm\/n\u0103m; (rHvn<\/sub>) \u0111\u1ea1t t\u1eeb 0,67 – 1,59 m\/n\u0103m v\u00e0 (\u2206M) \u0111\u1ea1t t\u1eeb 2,75 – 14,35 m3<\/sup>\/ha\/n\u0103m. Trong c\u00e1c m\u00f4 h\u00ecnh tr\u1ed3ng r\u1eebng h\u1ed7n lo\u00e0i, Hu\u1ef7nh c\u00f3 sinh tr\u01b0\u1edfng t\u1ed1t h\u01a1n so v\u1edbi c\u00e1c lo\u00e0i c\u00e2y b\u1ea3n \u0111\u1ecba nh\u01b0 Sao \u0111en, D\u1ea7u r\u00e1i, S\u1ebfn trung v\u00e0 sinh tr\u01b0\u1edfng ch\u1eadm h\u01a1n so v\u1edbi L\u00e1t hoa v\u00e0 Keo tai t\u01b0\u1ee3ng. M\u00f4 h\u00ecnh tr\u1ed3ng l\u00e0m gi\u00e0u r\u1eebng giai \u0111o\u1ea1n 6 tu\u1ed5i v\u00e0 8 tu\u1ed5i c\u00f3 (rD1,3<\/sub>) 0,82 – 0,85 cm\/n\u0103m; (rHvn<\/sub>) 0,68 – 0,80 m\/n\u0103m. M\u00f4 h\u00ecnh r\u1eebng tr\u1ed3ng thu\u1ea7n lo\u00e0i 23 tu\u1ed5i t\u1ea1i Qu\u1ea3ng B\u00ecnh c\u00f3 sinh tr\u01b0\u1edfng t\u1ed1t nh\u1ea5t v\u1edbi D1,3<\/sub>= 29,0 cm; Hvn<\/sub> = 22,9 m; Dt<\/sub> = 5,1 m; m\u1eadt \u0111\u1ed9 hi\u1ec7n t\u1ea1i l\u00e0 434 c\u00e2y\/ha, tr\u1eef l\u01b0\u1ee3ng \u0111\u1ea1t 330,0 m3<\/sup>\/ha, (rM) \u0111\u1ea1t 14,35 m3<\/sup>\/ha\/n\u0103m. T\u1ea1i tu\u1ed5i 4, c\u00e2y Hu\u1ef7nh \u0111\u1ea1t th\u1ec3 t\u00edch trung b\u00ecnh l\u00e0 0,0107 m3<\/sup>\/c\u00e2y, \u0111\u1ebfn tu\u1ed5i 23 \u0111\u1ea1t 0,5160 m3<\/sup>\/c\u00e2y, tu\u1ed5i 26 \u0111\u1ea1t 0,7069 m3<\/sup>\/c\u00e2y v\u00e0 \u0111\u1ebfn tu\u1ed5i 31 \u0111\u1ea1t 0,7159 m3<\/sup>\/c\u00e2y.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> N\u0103ng su\u1ea5t, Hu\u1ef7nh, sinh tr\u01b0\u1edfng<\/td>\n<\/tr>\n

<\/a>Growth and productivity of Tarrietia javanica<\/em> plantation in some North Central provinces<\/p>\n

Results of the evaluation of 16 models of Tarrietia javanica<\/em> plantation in the North Central provinces show that T. javanica<\/em> is being planted to provide large timber in three modes: pure planting, mixed planting and enrichment planting. In general, models of T. javanica <\/em>have low survival rates, ranging from 34.55% to 92.42%. The survival rate of T. javanica<\/em> these models trend decrease with age. At the age of 4, the average survival rate of T. javanica<\/em> species in planted model from 82.13% to 96.0%, by the period 13 – 15 years old, the survival rate decreased from 58.18% to 80.0% and by the age of 31, the survival rate is only 49.16%. T. javanica<\/em> is an indigenous tree with relatively fast growth. In pure plantation models, the current density was from 380 – 1,027 trees\/ha; (rD1,3<\/sub>) was from 0.88 – 1.64 cm\/year; (rHvn<\/sub>) reached from 0.67 to 1.59 m\/year and (rM) reached from 2.75 to 14.35 m3<\/sup>\/ha\/year. In the mixed planting models, T. javanica <\/em>had better growth than some indigenous species such as Hopea odorata<\/em>, Dipterocarpus alatus, Homalium ceylanicum <\/em>and it was slower than Chukrasia tabularis <\/em>and Acacia mangium<\/em>. The model of enrichment planting at age of 6 and 8 years old has reached (rD1,3<\/sub>) 0.82 – 0.85 cm\/year; (rHvn<\/sub>) 0.68 – 0.80 m\/year. The 23 – year-old pure planting model in Quang Binh has the best growth with (D1,3<\/sub>) = 29.0 cm; Hvn<\/sub> = 22.9 m; Dt<\/sub> = 5,1 m; with a current density of 434 trees\/ha, yield reached 330.0 m3<\/sup>\/ha, (rM) reached 14.35 m3<\/sup>\/ha\/year. At age of 4, the average volume of T. javanica<\/em> was 0.0107 m3<\/sup>\/tree, at age 23, it reached 0.5160 m3<\/sup>\/tree and at age 26, it reached 0.7069 m3<\/sup>\/tree, and by the age 31, the average volume was 0.7159 m3<\/sup>\/tree.<\/p>\n

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

<\/a>HI\u1ec6N TR\u1ea0NG G\u00c2Y TR\u1ed2NG C\u00c2Y S\u01a0N TRA (Docynia indica<\/em> (Wall.) Decne)
\nT\u1ea0I HUY\u1ec6N THAN UY\u00caN, T\u1ec8NH LAI CH\u00c2U<\/p>\n

<\/a>D\u01b0\u01a1ng V\u0103n Th\u1ea3o1<\/sup>, B\u00f9i Th\u1ee5y Anh2<\/sup><\/p>\n

1<\/sup>Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc N\u00f4ng L\u00e2m, \u0110\u1ea1i h\u1ecdc Th\u00e1i Nguy\u00ean
\n2H\u1ea1t Ki\u1ec3m l\u00e2m huy\u1ec7n Than Uy\u00ean, Lai Ch\u00e2u<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

C\u00e2y S\u01a1n tra \u0111\u00e3 \u0111\u01b0\u1ee3c g\u00e2y tr\u1ed3ng t\u1ea1i huy\u1ec7n Than Uy\u00ean, t\u1ec9nh Lai Ch\u00e2u t\u1eeb n\u0103m 2015 v\u1edbi \u0111\u1ecbnh h\u01b0\u1edbng ph\u00e1t tri\u1ec3n v\u00f9ng nguy\u00ean li\u1ec7u nh\u01b0ng ch\u01b0a c\u00f3 b\u00e1o c\u00e1o \u0111\u00e1nh gi\u00e1 hi\u1ec7n tr\u1ea1ng. B\u00e0i b\u00e1o n\u00e0y \u0111\u00e1nh gi\u00e1 hi\u1ec7n tr\u1ea1ng g\u00e2y tr\u1ed3ng S\u01a1n tra t\u1ea1i Than Uy\u00ean. K\u1ebft qu\u1ea3 cho th\u1ea5y t\u1ed5ng di\u1ec7n t\u00edch S\u01a1n tra t\u1ea1i Than Uy\u00ean \u0111\u1ea1t 397,5 ha. Ngu\u1ed3n gi\u1ed1ng S\u01a1n tra \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 tr\u1ed3ng r\u1eebng trong nh\u1eefng n\u0103m qua \u0111\u1ec1u l\u00e0 c\u00e2y h\u1ea1t, nh\u1eadp t\u1eeb t\u1ec9nh Y\u00ean B\u00e1i. Khi tr\u1ed3ng xen v\u1edbi Th\u00f4ng m\u00e3 v\u0129 k\u1ebft h\u1ee3p v\u1edbi c\u00e1c k\u1ef9 thu\u1eadt th\u00e2m canh, c\u00e2y S\u01a1n tra sinh tr\u01b0\u1edfng t\u1ed1t, \u0111\u1eb7c bi\u1ec7t \u1edf m\u1eadt \u0111\u1ed9 400 – 600 c\u00e2y\/ha. C\u00e2y S\u01a1n tra tr\u1ed3ng tr\u00ean \u0111\u1ea5t t\u1ed1t, t\u1ea7ng d\u00e0y, \u1ea9m, gi\u00e0u m\u00f9n sinh tr\u01b0\u1edfng t\u1ed1t. Ng\u01b0\u1ee3c l\u1ea1i \u1edf nh\u1eefng n\u01a1i \u0111\u1ea5t t\u1ea7ng m\u1ecfng, kh\u00f4, x\u1ea5u c\u00e2y sinh tr\u01b0\u1edfng k\u00e9m, b\u1ecb s\u00e2u, b\u1ec7nh h\u1ea1i ph\u1ed5 bi\u1ebfn. X\u00e9n t\u00f3c \u0111\u1ee5c th\u00e2n, b\u1ec7nh kh\u00f4 c\u00e0nh ng\u1ecdn v\u00e0 b\u1ec7nh \u0111\u1ed1m qu\u1ea3, th\u1ed1i qu\u1ea3 \u0111\u00e3 \u0111\u01b0\u1ee3c ghi nh\u1eadn l\u00e0 sinh v\u1eadt g\u00e2y h\u1ea1i ch\u00ednh tr\u00ean c\u00e2y S\u01a1n tra \u1edf Than Uy\u00ean. Do \u0111\u00f3 c\u1ea7n ph\u00e1t tri\u1ec3n c\u00e2y S\u01a1n tra theo h\u01b0\u1edbng th\u00e2m canh v\u00e0 nghi\u00ean c\u1ee9u c\u00e1c bi\u1ec7n ph\u00e1p qu\u1ea3n l\u00fd s\u00e2u, b\u1ec7nh h\u1ea1i \u0111\u1ec3 ph\u00e1t tri\u1ec3n b\u1ec1n v\u1eefng r\u1eebng tr\u1ed3ng S\u01a1n tra t\u1ea1i Than Uy\u00ean, Lai Ch\u00e2u.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Hi\u1ec7n tr\u1ea1ng, Lai Ch\u00e2u, S\u01a1n tra, g\u00e2y tr\u1ed3ng<\/td>\n<\/tr>\n

<\/a>Cultivation of Docynia indica<\/em> (Wall.) Decne) in Than Uyen district, Lai Chau province<\/p>\n

Docynia indica<\/em> has been planting in Than Uyen district, Lai Chau province since 2015 with the development orientation as material areas. However, so far, there have not been assessment reports on the growth and development of these cultivation models. This study aims to assess the cultivation of D. indica<\/em> in Than Uyen. The survey results showed that the total area of Son tra in Than Uyen reached 397.5 ha. However, only the seedling originating from Yen Bai province was used for afforestation over the years. When intercropping with Pinus massoniana<\/em> and applying intensive silviculture techniques, the D. indica<\/em> trees grow well, especially at a density of 400 – 600 trees\/ha. With the good soil, thick, moist, rich in humus, the plants grow very well. In contrast, in the bad soil, thin, dry, the plants grow poorly, and are attacking by pests and diseases. Longhorn beetle, drying branches disease, fruit spot disease and fruit rot disease have been recorded as major pests and diseases in D. indica<\/em> in Than Uyen. Therefore, it is necessary to develop this species in the direction of intensive silviculture and to continuing research on pest and disease management measures to sustainably cultivate D. indica<\/em> in Than Uyen district, Lai Chau province.<\/p>\n

Keywords:<\/em><\/strong> Cultivation, Docynia indica<\/em>, Lai Chau, Silviculture<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u0110\u1eb6C \u0110I\u1ec2M C\u1ea4U TR\u00daC KH\u00d4NG GIAN
\nC\u1ee6A C\u00c1C LO\u00c0I C\u00c2Y \u01afU TH\u1ebe TRONG R\u1eeaNG T\u1ef0 NHI\u00caN TRUNG B\u00ccNH KHU B\u1ea2O T\u1ed2N THI\u00caN NHI\u00caN B\u00ccNH CH\u00c2U – PH\u01af\u1edaC B\u1eecU<\/p>\n

<\/a>Nguy\u1ec5n V\u0103n Qu\u00fd1<\/sup>, Nguy\u1ec5n Thanh Tu\u1ea5n1<\/sup>, Nguy\u1ec5n V\u0103n H\u1ee3p1<\/sup>, Nguy\u1ec5n V\u0103n Th\u00e0nh2<\/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>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

L\u1ea5y ArcGIS l\u00e0m n\u1ec1n t\u1ea3ng, nghi\u00ean c\u1ee9u s\u1eed d\u1ee5ng c\u00f4ng c\u1ee5 t\u1ea1o \u0111a gi\u00e1c Thiessen, TIN \u0111\u1ec3 x\u00e2y d\u1ef1ng l\u01b0\u1ee3c \u0111\u1ed3 Voronoi v\u00e0 l\u01b0\u1edbi tam gi\u00e1c Delaunay c\u1ee7a c\u00e1c lo\u00e0i c\u00e2y trong \u00f4 ti\u00eau chu\u1ea9n t\u1ea1m th\u1eddi (OTC) 1ha thu\u1ed9c tr\u1ea1ng th\u00e1i r\u1eebng t\u1ef1 nhi\u00ean trung b\u00ecnh t\u1ea1i Khu b\u1ea3o t\u1ed3n thi\u00ean nhi\u00ean B\u00ecnh Ch\u00e2u – Ph\u01b0\u1edbc B\u1eedu v\u1edbi m\u1ee5c ti\u00eau nghi\u00ean c\u1ee9u \u0111\u1eb7c \u0111i\u1ec3m ph\u00e2n b\u1ed1 kh\u00f4ng gian c\u1ee7a c\u00e1c lo\u00e0i c\u00e2y \u01b0u th\u1ebf. S\u1ed1 li\u1ec7u thu th\u1eadp trong OTC bao g\u1ed3m: DBH, \u0111\u01b0\u1eddng k\u00ednh t\u00e1n, chi\u1ec1u cao v\u00fat ng\u1ecdn, t\u00ean lo\u00e0i v\u00e0 t\u1ecda \u0111\u1ed9 c\u1ee7a t\u1ea5t c\u1ea3 c\u00e1c c\u00e2y g\u1ed7 (DBH > 5 cm). D\u1ef1a v\u00e0o l\u01b0\u1ee3c \u0111\u1ed3 Voronoi v\u00e0 l\u01b0\u1edbi tam gi\u00e1c Delaunay \u0111\u00e3 t\u00ednh to\u00e1n \u0111\u01b0\u1ee3c 5 ch\u1ec9 s\u1ed1 c\u1ea5u tr\u00fac kh\u00f4ng gian theo t\u1eebng lo\u00e0i \u01b0u th\u1ebf. Nghi\u00ean c\u1ee9u \u0111\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c 5 lo\u00e0i c\u00e2y \u01b0u th\u1ebf trong t\u1ed5ng s\u1ed1 67 lo\u00e0i c\u00e2y trong OTC, th\u1ee9 t\u1ef1 v\u1edbi ch\u1ec9 s\u1ed1 IV% l\u1ea7n l\u01b0\u1ee3t l\u00e0 T\u00e1u tr\u1eafng (17,47%), M\u00e1u ch\u00f3 th\u1ea5u k\u00ednh (14,73%), Tr\u01b0\u1eddng chua (8,69%), C\u00e0 n\u00e1 (6,9%) v\u00e0 Tr\u00e2m v\u1ed1i (5,39%). \u0110\u1eb7c \u0111i\u1ec3m c\u1ea5u tr\u00fac kh\u00f4ng gian ch\u1ec9 ra r\u1eb1ng l\u00e2m ph\u1ea7n c\u00f3 s\u1ef1 \u0111a d\u1ea1ng v\u1ec1 lo\u00e0i c\u00e2y g\u1ed7 v\u1edbi m\u1ee9c \u0111\u1ed9 h\u1ed7n lo\u00e0i r\u1ea5t cao (M \u00bb 0,83), m\u1eadt \u0111\u1ed9 ph\u00e2n b\u1ed1 d\u00e0y, 4\/5 lo\u00e0i \u01b0u th\u1ebf (ngo\u1ea1i tr\u1eeb C\u00e0 n\u00e1) ph\u00e2n b\u1ed1 \u0111\u1ec1u \u1edf c\u00e1c t\u1ea7ng t\u00e1n r\u1eebng (U \u00bb 0,2), ch\u1ec9 s\u1ed1 \u0111\u1ed3ng g\u00f3c v\u00e0 \u0111\u1ed9 t\u1ee5 h\u1ee3p \u0111\u1ec1u cho th\u1ea5y 3\/5 lo\u00e0i \u01b0u th\u1ebf (T\u00e1u tr\u1eafng, M\u00e1u ch\u00f3 th\u1ea5u k\u00ednh v\u00e0 C\u00e0 n\u00e1) c\u00f3 d\u1ea1ng ph\u00e2n b\u1ed1 c\u1ee5m, 2\/5 lo\u00e0i \u01b0u th\u1ebf (Tr\u00e2m v\u1ed1i v\u00e0 Tr\u01b0\u1eddng chua) c\u00f3 d\u1ea1ng ph\u00e2n b\u1ed1 ng\u1eabu nhi\u00ean. K\u1ebft qu\u1ea3 c\u1ee7a nghi\u00ean c\u1ee9u gi\u00fap n\u1eafm \u0111\u01b0\u1ee3c \u0111\u1eb7c \u0111i\u1ec3m sinh tr\u01b0\u1edfng c\u1ee7a qu\u1ea7n x\u00e3 th\u1ef1c v\u1eadt r\u1eebng, l\u00e0m c\u01a1 s\u1edf khoa h\u1ecdc cho vi\u1ec7c b\u1ea3o t\u1ed3n \u0111a d\u1ea1ng sinh h\u1ecdc, \u0111\u1ec1 xu\u1ea5t c\u00e1c ph\u01b0\u01a1ng \u00e1n qu\u1ea3n l\u00fd r\u1eebng b\u1ec1n v\u1eefng t\u1ea1i khu v\u1ef1c nghi\u00ean c\u1ee9u. \u0110\u1ed3ng th\u1eddi nghi\u00ean c\u1ee9u c\u0169ng \u0111\u1ec1 xu\u1ea5t s\u1eed d\u1ee5ng ArcGIS trong nghi\u00ean c\u1ee9u \u0111\u1eb7c \u0111i\u1ec3m c\u1ea5u tr\u00fac kh\u00f4ng gian l\u00e2m ph\u1ea7n b\u1edfi \u0111\u00e2y l\u00e0 c\u00e1ch ti\u1ebfp c\u1eadn c\u00f3 nhi\u1ec1u \u01b0u \u0111i\u1ec3m h\u01a1n so v\u1edbi c\u00e1c ph\u1ea7n m\u1ec1m kh\u00e1c.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> C\u1ea5u tr\u00fac kh\u00f4ng gian, lo\u00e0i \u01b0u th\u1ebf, ph\u1ea7n m\u1ec1m ArcGIS, l\u01b0\u1ee3c \u0111\u1ed3 Voronoi, l\u01b0\u1edbi tam gi\u00e1c Delaunay<\/td>\n<\/tr>\n

<\/a>Spatial structure characteristics of dominant species in medium natural forest at Binh Chau – Phuoc Buu nature reserve<\/p>\n

This article used Create Thiessen Polygons and TIN tools in ArcGIS to build the Voronoi diagram and Delaunay triangular networks of all tree species in 1ha – plot of the medium natural forest state at Binh Chau – Phuoc Buu Nature Reserve with the objective study the spatial structural characteristics of dominant tree species. Data collected in the plot include DBH, crown diameter, overall height, tree species names, and coordinates of all trees (DBH > 5 cm). The article identified 5 dominant species of 67 tree species in the study plot with the descending order of IV% index were Vatica odorata<\/em> (17.47%), Knema lenta<\/em> (14.73%), Nephelium chryseum<\/em> (8.69%), Garcinia merguensis<\/em> (6.9%) and Syzygium cumini<\/em> (5.39%). The spatial distribution characteristics of the stand was a species diversity, the mingling of dominant species was complete mixture (M \u00bb 0.83), the density distribution was dense, 4 of 5 dominant species (except G. merguensis<\/em>) were regular distributed in the canopy layers (U \u00bb 0.2), the uniform angle index and the coefficient of variation both showed that 3 of 5 dominant species (V. odorata<\/em>, K. lenta<\/em> and G. merguensis<\/em>) were clumped distribution, 2 of 5 dominant species (S. cumini<\/em> and N. chryseum<\/em>) were random distribution. Research results help to grasp the growth characteristics of forest plant communities, serve as a scientific basis for biodiversity protection and propose sensible forest management measures in the study area. At the same time, the article also proposes to use ArcGIS in studying the spatial structure characteristics of the stand because this approach has many advantages over other software.<\/p>\n

Keywords:<\/em><\/strong> Spatial structural, dominant species, Voronoi diagram, Delaunay triangular networks, ArcGIS<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U B\u1ed4 SUNG K\u1ef8 THU\u1eacT CHUY\u1ec2N H\u00d3A
\nR\u1eeaNG TR\u1ed2NG KEO LAI V\u00c0 KEO TAI T\u01af\u1ee2NG S\u1ea2N XU\u1ea4T G\u1ed6 NH\u1ece TH\u00c0NH R\u1eeaNG G\u1ed6 L\u1edaN<\/p>\n

<\/a>Tr\u1ea7n L\u00e2m \u0110\u1ed3ng1<\/sup>, \u0110\u1eb7ng V\u0103n Thuy\u1ebft1<\/sup>, Chu Ng\u1ecdc Qu\u00e2n2<\/sup>, Tr\u1ea7n H\u1ed3ng V\u00e2n1<\/sup>,
\nHo\u00e0ng Th\u1ecb Nhung1<\/sup>, Ho\u00e0ng V\u0103n Th\u00e0nh1<\/sup>, Tr\u1ea7n Anh H\u1ea3i1<\/sup>,
\nD\u01b0\u01a1ng Quang Trung1<\/sup>, Ph\u1ea1m V\u0103n Vinh1<\/sup><\/p>\n

1<\/sup>Vi\u1ec7n Nghi\u00ean c\u1ee9u L\u00e2m sinh, 2<\/sup>V\u01b0\u1eddn Qu\u1ed1c gia Ba V\u00ec<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

keo lai v\u00e0 Keo tai t\u01b0\u1ee3ng l\u00e0 lo\u00e0i c\u00e2y tr\u1ed3ng ch\u1ee7 l\u1ef1c s\u1ea3n xu\u1ea5t g\u1ed7 trong n\u01b0\u1edbc, nh\u01b0ng ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c tr\u1ed3ng v\u1edbi chu k\u1ef3 ng\u1eafn \u0111\u1ec3 s\u1ea3n xu\u1ea5t d\u0103m g\u1ed7. M\u1eb7c d\u00f9 \u0111\u00e3 c\u00f3 nhi\u1ec1u nghi\u00ean c\u1ee9u v\u00e0 ch\u1ee7 tr\u01b0\u01a1ng, ch\u00ednh s\u00e1ch th\u00fac \u0111\u1ea9y chuy\u1ec3n h\u00f3a r\u1eebng keo s\u1ea3n su\u1ea5t g\u1ed7 nh\u1ecf sang g\u1ed7 l\u1edbn, trong th\u1ef1c ti\u1ec5n nh\u1eefng lo ng\u1ea1i v\u1ec1 \u1ea3nh h\u01b0\u1edfng c\u1ee7a gi\u00f3 b\u00e3o t\u1edbi r\u1eebng tr\u1ed3ng v\u00e0 \u00e1p d\u1ee5ng c\u00e1c bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt g\u00ec \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o hi\u1ec7u qu\u1ea3 c\u1ee7a chuy\u1ec3n h\u00f3a r\u1eebng v\u1eabn l\u00e0m cho ch\u1ee7 r\u1eebng lo ng\u1ea1i. Nghi\u00ean c\u1ee9u n\u00e0y \u0111\u00e1nh gi\u00e1 \u1ea3nh h\u01b0\u1edfng c\u1ee7a gi\u00f3 b\u00e3o t\u1edbi r\u1eebng tr\u1ed3ng keo v\u00e0 th\u00ed nghi\u1ec7m \u1ea3nh h\u01b0\u1edfng c\u1ee7a c\u00e1c bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt t\u1ec9a th\u01b0a v\u00e0 b\u00f3n ph\u00e2n sau t\u1ec9a th\u01b0a l\u00e0m c\u01a1 s\u1edf \u0111\u1ec1 xu\u1ea5t c\u00e1c bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt chuy\u1ec3n h\u00f3a r\u1eebng th\u00edch h\u1ee3p. K\u1ebft qu\u1ea3 cho th\u1ea5y, r\u1eebng tr\u1ed3ng keo lai v\u00e0 Keo tai t\u01b0\u1ee3ng c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng ch\u1ecbu gi\u00f3 b\u00e3o k\u00e9m, v\u00e0 b\u1ecb \u0111\u1ed5 g\u00e3y \u1edf quy m\u00f4 l\u1edbn d\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng c\u1ee7a c\u00e1c c\u01a1n b\u00e3o c\u1ea5p 10 tr\u1edf l\u00ean. Trong khi \u0111\u00f3, c\u00e1c lo\u00e0i c\u00e2y n\u00e0y ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c tr\u1ed3ng \u1edf nh\u1eefng v\u00f9ng c\u00f3 chu k\u1ef3 xu\u1ea5t hi\u1ec7n c\u00e1c c\u01a1n b\u00e3o t\u1eeb c\u1ea5p 10 tr\u1edf l\u00ean t\u1eeb 1,6 – 6,4 n\u0103m\/c\u01a1n, gi\u1ea3m d\u1ea7n t\u1eeb Qu\u1ea3ng Ninh t\u1edbi Ninh Thu\u1eadn. D\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng c\u1ee7a c\u00e1c c\u01a1n b\u00e3o l\u1edbn, c\u00f3 s\u1ef1 \u1ea3nh h\u01b0\u1edfng r\u00f5 r\u1ec7t gi\u1eefa h\u01b0\u1edbng ph\u01a1i v\u00e0 \u0111\u1ecba h\u00ecnh t\u1edbi t\u1ef7 l\u1ec7 s\u1ed1 c\u00e2y b\u1ecb thi\u1ec7t h\u1ea1i trong l\u00e2m ph\u1ea7n; c\u00e1c y\u1ebfu t\u1ed1 kh\u00e1c nh\u01b0 gi\u1ed1ng, m\u1eadt \u0111\u1ed9 hi\u1ec7n t\u1ea1i v\u00e0 tu\u1ed5i r\u1eebng kh\u00f4ng c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t. T\u1ec9a th\u01b0a c\u00f3 \u1ea3nh h\u01b0\u1edfng r\u00f5 r\u1ec7t t\u1edbi sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh v\u00e0 t\u1ef7 l\u1ec7 g\u1ed7 l\u1edbn c\u1ee7a l\u00e2m ph\u1ea7n. \u0110\u1ed9 tu\u1ed5i t\u1ec9a th\u01b0a th\u00edch h\u1ee3p t\u1eeb 3 – 5 tu\u1ed5i t\u00f9y theo m\u1eadt \u0111\u1ed9 hi\u1ec7n t\u1ea1i c\u1ee7a r\u1eebng. T\u1ef7 l\u1ec7 c\u00e2y b\u1ecb khuy\u1ebft t\u1eadt v\u00e0 ch\u1ebft h\u00e0ng n\u0103m do gi\u00f3 b\u00e3o v\u00e0 s\u00e2u b\u1ec7nh cao, n\u00ean l\u00e2m ph\u1ea7n \u0111\u01b0a v\u00e0o chuy\u1ec3n h\u00f3a c\u1ea7n c\u00f3 s\u1ed1 l\u01b0\u1ee3ng c\u00e2y m\u1ee5c \u0111\u00edch \u0111\u1ee7 l\u1edbn, t\u1ed1i thi\u1ec3u 1.200 c\u00e2y\/ha. M\u1eadt \u0111\u1ed9 \u0111\u1ec3 l\u1ea1i \u1edf l\u1ea7n t\u1ec9a th\u01b0a \u0111\u1ea7u ti\u00ean c\u1ea7n \u0111\u1ea3m b\u1ea3o trong kho\u1ea3ng 800 – 1.000 c\u00e2y\/ha \u0111\u1ed1i v\u1edbi keo lai v\u00e0 750 – 950 c\u00e2y\/ha \u0111\u1ed1i v\u1edbi Keo tai t\u01b0\u1ee3ng, t\u00f9y theo m\u1eadt \u0111\u1ed9 hi\u1ec7n t\u1ea1i v\u00e0 tu\u1ed5i r\u1eebng. Ch\u01b0a th\u1ea5y c\u00f3 s\u1ef1 \u1ea3nh h\u01b0\u1edfng r\u00f5 r\u1ec7t c\u1ee7a b\u00f3n ph\u00e2n sau t\u1ec9a th\u01b0a t\u1edbi sinh tr\u01b0\u1edfng v\u00e0 n\u0103ng su\u1ea5t r\u1eebng keo lai v\u00e0 Keo tai t\u01b0\u1ee3ng.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> R\u1eebng tr\u1ed3ng, chuy\u1ec3n h\u00f3a r\u1eebng, t\u1ec9a th\u01b0a, m\u1eadt \u0111\u1ed9 \u0111\u1ec3 l\u1ea1i, b\u00f3n ph\u00e2n, gi\u00f3 b\u00e3o<\/td>\n<\/tr>\n

<\/a>Research on techniques to convert short-rotation to long-rotation acacia hybrid and Acacia mangium<\/em> plantations for saw-logs production<\/p>\n

acacia hybrid and A. mangium<\/em> are the major species in wood production in the Vietnam. However, they are mainly grown with a short rotation to produce wood chips. Although there have been many studies and policies to promote the conversion of short-rotation to long-rotation acacia plantation for saw-log production, in practice concerns of forest owners about the impact of typhoons on long-rotation plantations and how thinning techniques are used to ensure the effectiveness of conversion are the major constraints. This study evaluates the influence of typhoons on acacia plantations and experiments on the effects of thinning techniques and post-thinning fertilizer application as a basis for proposing appropriate techniques. The results show that the acacia hybrid<\/em> and A. mangium<\/em> plantations have poor wind and storm resistance, and are damaged on a large scale under the impact of storms level 10 or higher. However, these trees are mainly grown in areas with a high frequency of typhoons of such levels, from 1.6 to 6.4 years\/storm, decreasing gradually from Quang Ninh to Ninh Thuan province. Under the impact of these storms, there is a significant influence of plantation exposure direction and topography on the percentage of damaged trees in the acacia stand; Other factors such as species, current tree density and age were not significantly different. Thinning had a significant effect on growth of diameter and saw-log volume of the stand. The appropriate age of thinning is from 3 to 5 years old depending on the current tree density of the plantation. The rate of defect trees and annual death due to wind storms, pests and diseases are high, so the selected plantation for conversion should have a minimum number of purpose trees of 1200 trees\/ha. The number of tree remained after the first thinning should be in the range of 800 – 1.000 trees\/ha for acacia hybrid and 750 – 950 trees\/ha for A. mangium<\/em>, depending on the current tree density and age of selected plantation. There was no signification difference of post-thinning fertilizer application on growth and productivity of both acacia hybrid and A. mangium<\/em> plantations.<\/p>\n

Keywords:<\/em><\/strong> Acacia plantation, short-rotation to long-rotation, thinning, tree density, fertilizer application, typhoon effect<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>T\u01af\u01a0NG QUAN GI\u1eeeA NH\u00c2N T\u1ed0 \u0110I\u1ec0U TRA L\u00c2M PH\u1ea6N V\u1edaI CH\u1ec8 TI\u00caU
\nL\u00dd, H\u00d3A T\u00cdNH \u0110\u1ea4T V\u00c0 TH\u1edcI GIAN B\u1ece H\u00d3A C\u1ee6A R\u1eeaNG PH\u1ee4C H\u1ed2I
\nSAU CANH T\u00c1C N\u01af\u01a0NG R\u1eaaY T\u1ea0I HUY\u1ec6N M\u1ed8C CH\u00c2U, T\u1ec8NH S\u01a0N LA<\/p>\n

<\/a>Nguy\u1ec5n Ho\u00e0ng H\u01b0\u01a1ng1<\/sup>, Tr\u1ea7n Vi\u1ec7t H\u00e01<\/sup>, Cao Th\u1ecb Thu Hi\u1ec1n1<\/sup>,
\nL\u00ea Tu\u1ea5n Anh1<\/sup>, V\u0169 Th\u1ecb Huy\u1ec1n2<\/sup><\/p>\n

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

B\u00e0i b\u00e1o n\u00e0y tr\u00ecnh b\u00e0y k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u v\u1ec1 m\u1ed1i quan h\u1ec7 gi\u1eefa m\u1ed9t s\u1ed1 nh\u00e2n t\u1ed1 \u0111i\u1ec1u tra l\u00e2m ph\u1ea7n c\u01a1 b\u1ea3n c\u1ee7a r\u1eebng ph\u1ee5c h\u1ed3i sau canh t\u00e1c n\u01b0\u01a1ng r\u1eaby v\u1edbi m\u1ed9t s\u1ed1 ch\u1ec9 ti\u00eau l\u00fd, h\u00f3a t\u00ednh c\u1ee7a \u0111\u1ea5t v\u00e0 th\u1eddi gian b\u1ecf h\u00f3a t\u1ea1i huy\u1ec7n M\u1ed9c Ch\u00e2u, t\u1ec9nh S\u01a1n La. Nh\u00f3m nghi\u00ean c\u1ee9u \u0111\u00e3 thi\u1ebft l\u1eadp 50 \u00f4 ti\u00eau chu\u1ea9n (OTC) [m\u1ed7i \u00f4 c\u00f3 di\u1ec7n t\u00edch 1.000 m2<\/sup> (40 \u00b4 <\/strong>50 m)] \u0111\u1ec3 thu th\u1eadp s\u1ed1 li\u1ec7u v\u1ec1 t\u1ea7ng c\u00e2y t\u00e1i sinh (l\u00e0 nh\u1eefng c\u00e2y c\u00f3 \u0111\u01b0\u1eddng k\u00ednh ngang ng\u1ef1c < 6 cm). M\u1eabu \u0111\u1ea5t \u0111\u01b0\u1ee3c thu th\u1eadp tr\u00ean c\u00e1c OTC theo ph\u01b0\u01a1ng ph\u00e1p l\u1ea5y m\u1eabu t\u1ed5ng h\u1ee3p (TCVN 9487 – \u00a02012). K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y, m\u1eadt \u0111\u1ed9 c\u00e2y t\u00e1i sinh v\u00e0 chi\u1ec1u cao b\u00ecnh qu\u00e2n c\u00e2y t\u00e1i sinh ch\u1ecbu \u1ea3nh h\u01b0\u1edfng ch\u1ee7 y\u1ebfu b\u1edfi s\u1ed1 n\u0103m b\u1ecf h\u00f3a, h\u00e0m l\u01b0\u1ee3ng m\u00f9n (M%) v\u00e0 \u0111\u1ed9 x\u1ed1p (P%) c\u1ee7a \u0111\u1ea5t theo c\u00e1c d\u1ea1ng ph\u01b0\u01a1ng tr\u00ecnh: M\u1eadt \u0111\u1ed9 = 107,636 + 17,121*n\u0103m + 0,914*\u0111\u1ed9 x\u1ed1p + 17,871*m\u00f9n; Chi\u1ec1u cao b\u00ecnh qu\u00e2n = 0,016 + 0,201*n\u0103m + 0,0035*\u0111\u1ed9 x\u1ed1p + 0,029*m\u00f9n. Hai nguy\u00ean t\u1eafc x\u00e1c \u0111\u1ecbnh ti\u00eau ch\u00ed th\u00e0nh r\u1eebng l\u00e0 (1) \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u00e1nh gi\u00e1 l\u00e0 nh\u1eefng c\u00e2y t\u00e1i sinh c\u00f3 Hvn<\/sub> \u2265 0,5 m v\u00e0 (2) m\u1eadt \u0111\u1ed9 c\u00e2y t\u00e1i sinh N\u00ad(H \u2265 0,5 m) <\/sub>\u2265 500 c\u00e2y\/ha v\u00e0 c\u00e1c bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt l\u00e2m sinh g\u1ed3m: khoanh nu\u00f4i x\u00fac ti\u1ebfn t\u00e1i sinh t\u1ef1 nhi\u00ean v\u00e0 khoanh nu\u00f4i x\u00fac ti\u1ebfn t\u00e1i sinh t\u1ef1 nhi\u00ean c\u00f3 tr\u1ed3ng b\u1ed5 sung l\u00e0 c\u00e1c l\u1ef1a ch\u1ecdn ph\u00f9 h\u1ee3p cho c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng r\u1eebng ph\u1ee5c h\u1ed3i sau n\u01b0\u01a1ng r\u1eaby t\u1ea1i khu v\u1ef1c nghi\u00ean c\u1ee9u.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> \u0110\u1ed9 x\u1ed1p \u0111\u1ea5t, m\u1eadt \u0111\u1ed9 t\u00e1i sinh, ph\u1ee5c h\u1ed3i r\u1eebng, t\u00ednh ch\u1ea5t l\u00fd h\u00f3a c\u1ee7a \u0111\u1ea5t, t\u01b0\u01a1ng quan tuy\u1ebfn t\u00ednh<\/td>\n<\/tr>\n

<\/a>Relationship between some inventory factors and soil physical and chemical properties and fallow time of forest rehabilitation after shifting cultivation in Moc Chau district, Son La province<\/p>\n

This paper presents the results of research on the relationship between some basic inventory factors of forest rehabilitation after shifting cultivation and soil physical and chemical properties and fallow time in Moc Chau district, Son La province. A total of 50 temporary sample plots was established [(each plot has an area of 1,000 m2<\/sup> (40 \u00b4 <\/strong>50 m))] and data was collected for regenerations (trees with diameter at breast height < 6 cm). Soil samples were collected on sample plots according to TCVN 9487 – \u00a02012. The results showed that the density of regenerations and the average height of regenerations were mainly influenced by the number of fallow years, soil organic matter (M%) and soil porosity (P%). Research results showed the equations representing the relationship between density and average height of regenerations are: Density = 107,636 + 17.121*fallow years + 0.914*soil porosity + 17.871*soil organic matter; Average height = 0.016 + 0.201*fallow year + 0.0035*soil porosity + 0.029*soil organic matter. Two principles for determining the criteria for forest formation are recommended, including: (1) the assessed objects are regenerations with total tree height HVN<\/sub> \u2265 0.5 m and (2) the density of regenerations NH \u2265 0.5 m<\/sub> \u2265 500 trees\/ha and silvicultural measures including: zoning to promote natural regeneration and zoning to promote natural regeneration with additional planting are suitable options for the forests recovered after shifting cultivation in the study area.<\/p>\n

Keywords:<\/em><\/strong> Soil porosity, regeneration density, forest rehabilitation, soil physical and chemical properties, linear regression<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>TH\u00c0NH PH\u1ea6N V\u00c0 M\u1ee8C \u0110\u1ed8 X\u00c2M H\u1ea0I C\u1ee6A M\u1ed8T S\u1ed0 TH\u1ef0C V\u1eacT NGO\u1ea0I LAI T\u1ea0I T\u1ec8NH L\u00c2M \u0110\u1ed2NG<\/p>\n

<\/a>Nguy\u1ec5n Th\u00e0nh M\u1ebfn1<\/sup>, L\u01b0\u01a1ng V\u0103n D\u0169ng2<\/sup>, Ho\u00e0ng Thanh Tr\u01b0\u1eddng1<\/sup>, L\u01b0u Th\u1ebf Trung1<\/sup>,
\nPh\u1ea1m Tr\u1ecdng Nh\u00e2n1<\/sup>, \u0110\u1ed3ng Th\u1ecb Hi\u1ec1n1<\/sup><\/p>\n

1<\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Nam Trung B\u1ed9 v\u00e0 T\u00e2y Nguy\u00ean
\n2<\/sup>Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc \u0110\u00e0 L\u1ea1t<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

\u0110i\u1ec1u tra th\u1ef1c \u0111\u1ecba \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n tr\u00ean 2 th\u00e0nh ph\u1ed1 v\u00e0 10 huy\u1ec7n c\u1ee7a t\u1ec9nh L\u00e2m \u0110\u1ed3ng; v\u1edbi 10 lo\u00e0i th\u1ef1c v\u1eadt ngo\u1ea1i lai ph\u1ed5 bi\u1ebfn. Trong \u0111\u00f3, c\u00e1c lo\u00e0i ngo\u1ea1i lai x\u00e2m h\u1ea1i g\u1ed3m: B\u00e8o t\u00e2y (Eichhornia crassipes<\/em>), C\u00e2y ng\u0169 s\u1eafc (Lantana camara<\/em>), C\u1ecf l\u00e0o (Chromoleana odorata<\/em>), Trinh n\u1eef m\u00f3c (Mimosa diplotricha<\/em>), Trinh n\u1eef th\u00e2n g\u1ed7 (Mimosa pigra<\/em>); C\u00e1c lo\u00e0i ngo\u1ea1i lai c\u00f3 nguy c\u01a1 x\u00e2m h\u1ea1i: C\u00e2y c\u1ee9t l\u1ee3n (Ageratum conyzoides<\/em>), C\u00e2y l\u01b0\u1ee3c v\u00e0ng (Callisia fragrans<\/em>), Keo gi\u1eadu (Leucaena leucocephala<\/em>), G\u1eebng d\u1ea1i (Hedychium gardnerianum<\/em>), S\u00f2 \u0111o cam (Spathodea campanulata<\/em>). K\u1ebft qu\u1ea3 \u0111\u00e1nh gi\u00e1 m\u1ee9c \u0111\u1ed9 x\u00e2m h\u1ea1i cho th\u1ea5y c\u00f3 2 lo\u00e0i x\u00e2m h\u1ea1i nghi\u00eam tr\u1ecdng (Mai d\u01b0\u01a1ng, Trinh n\u1eef m\u00f3c), 3 lo\u00e0i x\u00e2m h\u1ea1i cao (B\u00e8o t\u00e2y, C\u00e2y ng\u0169 s\u1eafc, C\u1ecf l\u00e0o), 1 lo\u00e0i x\u00e2m h\u1ea1i v\u1eeba (C\u00e2y c\u1ee9t l\u1ee3n), 2 lo\u00e0i \u00edt x\u00e2m h\u1ea1i (G\u1eebng d\u1ea1i, Keo gi\u1eadu) v\u00e0 2 lo\u00e0i r\u1ea5t \u00edt x\u00e2m h\u1ea1i (C\u00e2y l\u01b0\u1ee3c v\u00e0ng, S\u00f2 \u0111o cam). Trong qu\u00e1 tr\u00ecnh \u0111i\u1ec1u tra c\u0169ng \u0111\u00e3 x\u00e1c \u0111\u1ecbnh v\u00e0 ghi nh\u1eadn th\u00f4ng tin ban \u0111\u1ea7u c\u1ee7a 25 lo\u00e0i th\u1ef1c v\u1eadt ngo\u1ea1i lai kh\u00e1c. Trong \u0111\u00f3 lo\u00e0i \u0110i\u1ec1n ma m\u1ef9 (Aeschynomene<\/em> americana<\/em>) \u0111\u00e3 xu\u1ea5t hi\u1ec7n r\u1ed9ng v\u00e0 x\u00e2m h\u1ea1i kh\u00e1 m\u1ea1nh \u1edf nhi\u1ec1u \u0111\u1ecba ph\u01b0\u01a1ng trong t\u1ec9nh L\u00e2m \u0110\u1ed3ng.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> M\u1ee9c \u0111\u1ed9 x\u00e2m h\u1ea1i, th\u1ef1c v\u1eadt ngo\u1ea1i lai, th\u00e0nh ph\u1ea7n th\u1ef1c v\u1eadt, t\u1ec9nh L\u00e2m \u0110\u1ed3ng<\/td>\n<\/tr>\n

<\/a>Alien invasive plants and their impact in Lam Dong province, Vietnam<\/p>\n

Field surveys were accomplished in two cities and ten districts of Lam Dong province. Ten alien invasive plant species were surveyed. Invasion Alien species: Eichhornia crassipes<\/em>, Lantana camara<\/em>, Chromoleana odorata<\/em>, Mimosa diplotricha<\/em>, Mimosa pigra<\/em>; Alien species with risk of Invasion: Ageratum conyzoides Callisia fragrans<\/em>, Leucaena leucocephala<\/em>, Hedychium gardnerianum<\/em>, Spathodea campanulata<\/em>. The assessment on level of their impact were specified in Lam Dong province. The results showed that 2 plant species Mimosa pigra<\/em> and Mimosa diplotricha<\/em> are Massive level (MA), 3 plant species Eichhornia crassipes, <\/em>Lantana camara <\/em>and Chromoleana odorata<\/em> are Major level (MR), Ageratum conyzoides<\/em> is Moderate (MO), Minor (MI) are Hedychium gardnerianum <\/em>and Leucaena leucocephala;<\/em> and 2 plant species are Minimal (ML). Addition, there are 25 alien plant species recorded in Lam Dong province. Among them Aeschynomene<\/em> americana <\/em>is alien plant species widening and invasing strongly in lot of areas in Lam Dong.<\/p>\n

Keywords:<\/em><\/strong> Level of impact, alien plant species, plant composition, Lam Dong province<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>B\u01af\u1edaC \u0110\u1ea6U X\u00c1C \u0110\u1ecaNH LO\u00c0I M\u1eccT (Coccotrypes<\/em> sp.)
\n\u0110\u1ee4C QU\u1ea2 \u0110\u01af\u1edaC (Rhizophora apiculata<\/em> BL.) \u1ede R\u1eeaNG NG\u1eacP M\u1eb6N
\nT\u1ea0I V\u00d9NG T\u00c2Y NAM B\u1ed8<\/p>\n

<\/a>Tr\u1ea7n Xu\u00e2n H\u01b0ng, L\u00ea V\u0103n B\u00ecnh<\/p>\n

Trung t\u00e2m Nghi\u00ean c\u1ee9u B\u1ea3o v\u1ec7 r\u1eebng<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

R\u1eebng ng\u1eadp m\u1eb7n l\u00e0 h\u1ec7 sinh th\u00e1i \u0111\u1eb7c bi\u1ec7t c\u00f3 kh\u1ea3 n\u0103ng th\u00edch nghi t\u1ed1t tr\u00ean c\u00e1c v\u00f9ng ven bi\u1ec3n v\u00e0 \u0111\u1eb7c bi\u1ec7t gi\u00fap gi\u1ea3m thi\u1ec3u \u1ea3nh h\u01b0\u1edfng c\u1ee7a bi\u1ebfn \u0111\u1ed5i kh\u00ed h\u1eadu cho khu v\u1ef1c duy\u00ean h\u1ea3i. Tuy nhi\u00ean, c\u00e1c lo\u00e0i s\u00e2u h\u1ea1i nh\u01b0 s\u00e2u \u0111\u1ee5c th\u00e2n, x\u00e9n t\u00f3c \u0111\u00e3 v\u00e0 \u0111ang l\u00e0m \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ch\u1ea5t l\u01b0\u1ee3ng r\u1eebng, qu\u00e1 tr\u00ecnh ph\u1ee5c h\u1ed3i v\u00e0 kh\u1ea3 n\u0103ng t\u00e1i sinh c\u1ee7a r\u1eebng. Nghi\u00ean c\u1ee9u n\u00e0y b\u01b0\u1edbc \u0111\u1ea7u x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c lo\u00e0i m\u1ecdt Coccotrypes <\/em>sp.<\/em> \u0111\u1ee5c qu\u1ea3 \u0110\u01b0\u1edbc \u1edf r\u1eebng ng\u1eadp m\u1eb7n v\u00f9ng T\u00e2y Nam B\u1ed9. M\u1ecdt tr\u01b0\u1edfng th\u00e0nh c\u00e1i m\u00e0u n\u00e2u \u0111\u1eadm ho\u1eb7c \u0111en c\u00f3 chi\u1ec1u d\u00e0i c\u01a1 th\u1ec3 2,65 – 2,77 mm, chi\u1ec1u r\u1ed9ng 0,98 – 1,06 mm, c\u00e1nh c\u1ee9ng v\u00e1t nh\u1ecdn. Lo\u00e0i m\u1ecdt n\u00e0y \u0111\u1ee5c qu\u1ea3 \u0110\u01b0\u1edbc ngay khi qu\u1ea3 v\u1eabn c\u00f2n tr\u00ean c\u00e2y v\u00e0 khi qu\u1ea3 r\u1ee5ng xu\u1ed1ng m\u1eb7t n\u01b0\u1edbc, l\u00e0m \u1ea3nh h\u01b0\u1edfng l\u1edbn \u0111\u1ebfn t\u1ef7 l\u1ec7 t\u00e1i sinh v\u00e0 m\u1eadt \u0111\u1ed9 r\u1eebng. \u0110\u00e2y l\u00e0 lo\u00e0i sinh v\u1eadt g\u00e2y h\u1ea1i m\u1edbi v\u00e0 l\u00e0 m\u1ed1i nguy h\u1ea1i \u0111\u1ed1i v\u1edbi qu\u00e1 tr\u00ecnh ph\u1ee5c h\u1ed3i r\u1eebng ng\u1eadp m\u1eb7n \u1edf v\u00f9ng T\u00e2y Nam B\u1ed9.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Coccotrypes <\/em>sp.,<\/em> m\u1ecdt \u0111\u1ee5c qu\u1ea3, c\u00e2y \u0110\u01b0\u1edbc, r\u1eebng ng\u1eadp m\u1eb7n, T\u00e2y Nam B\u1ed9<\/td>\n<\/tr>\n

<\/a>Preliminary identification the beetle (Coccotrypes <\/em>sp.<\/em>) boring the propagules of mangrove (Rhizophora apiculata<\/em> BL.) in the mangrove forest of the Southwest region<\/p>\n

Mangrove forest is a special ecosystem, which greatly adapts to the coastal area, and especially help to minimise the effects of climate change. However, the insect species such as stem borers, longhorn beetles have caused the significant impact on the quality and regeneration of the mangrove forest. This study initially identified the beetle (Coccotrypes <\/em>sp.<\/em>) boring the propagules of mangrove trees in the Southwest region. The female adults are dark brown or black, 2.65 – 2.77 mm in length, 0.98 – 1.06 mm in width, have sharp-pointed elytra. The beetle attacks both the propagules hanging on the trees and the fallen propagules on the water surface, seriously affecting the regeneration rate and mangrove forest density. This is a new pest species, which is considered as the risk to the restoration of the mangrove forest in the Southwest region.<\/p>\n

Keywords:<\/em><\/strong> Coccotrypes <\/em>sp., <\/em>fruit borer beetle, Rhizophora<\/em> apiculata<\/em>, mangrove forest, Southwest region<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>M\u1ed8T S\u1ed0 \u0110\u1eb6C \u0110I\u1ec2M SINH H\u1eccC LO\u00c0I X\u00c9N T\u00d3C N\u00c2U
\nMonochamus alternatus <\/em>Hope (Coleoptera: Cerambycidae)
\nH\u1ea0I TH\u00d4NG M\u00c3 V\u0128 T\u1ea0I M\u1ed8T S\u1ed0 T\u1ec8NH PH\u00cdA B\u1eaeC VI\u1ec6T NAM<\/p>\n

<\/a>Nguy\u1ec5n V\u0103n Th\u00e0nh, L\u00ea V\u0103n B\u00ecnh<\/p>\n

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

B\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p nu\u00f4i trong ph\u00f2ng th\u00ed nghi\u1ec7m k\u1ebft h\u1ee3p v\u1edbi \u0111i\u1ec1u tra ngo\u00e0i hi\u1ec7n tr\u01b0\u1eddng x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c m\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m sinh h\u1ecdc c\u1ee7a lo\u00e0i X\u00e9n t\u00f3c n\u00e2u (M.alternatus<\/em>): Khi \u0111\u01b0\u1ee3c nu\u00f4i trong m\u00f4i tr\u01b0\u1eddng th\u1ee9c \u0103n nh\u00e2n t\u1ea1o (to<\/sup>= 25o<\/sup>C, w%=70%), th\u1eddi gian ho\u00e0n th\u00e0nh v\u00f2ng \u0111\u1eddi trung b\u00ecnh 222,66 ng\u00e0y. Khi nu\u00f4i trong m\u00f4i tr\u01b0\u1eddng th\u1ee9c \u0103n t\u1ef1 nhi\u00ean (to<\/sup>tb<\/sub>=28,6o<\/sup>C; w%tb<\/sub>=78,9%) th\u00ec th\u1eddi gian ho\u00e0n th\u00e0nh v\u00f2ng \u0111\u1eddi trung b\u00ecnh 239,8 ng\u00e0y. X\u00e9n t\u00f3c tr\u01b0\u1edfng th\u00e0nh m\u1edbi v\u0169 h\u00f3a, c\u01a1 th\u1ec3 m\u1ec1m v\u00e0 c\u00f3 m\u00e0u n\u00e2u nh\u1ea1t, sau t\u1eeb 6 \u0111\u1ebfn 12 ng\u00e0y \u0103n b\u1ed5 sung th\u00ec c\u01a1 th\u1ec3 b\u1eaft \u0111\u1ea7u th\u00e0nh th\u1ee5c. X\u00e9n t\u00f3c tr\u01b0\u1edfng th\u00e0nh \u0111\u1ebb tr\u1ee9ng t\u1eadp trung nhi\u1ec1u nh\u1ea5t \u1edf 2 kho\u1ea3ng gi\u1edd l\u00e0 t\u1eeb 8 \u0111\u1ebfn 10h gi\u1edd t\u1ed1i v\u00e0 10 \u0111\u1ebfn 12h \u0111\u00eam v\u00e0 m\u1ed9t c\u00e1 th\u1ec3 tr\u01b0\u1edfng th\u00e0nh c\u00f3 th\u1ec3 \u0111\u1ebb t\u1eeb 1 \u0111\u1ebfn 3 qu\u1ea3 tr\u1ee9ng m\u1ed7i l\u1ea7n, ch\u00fang m\u1ea5t t\u1eeb 6 \u0111\u1ebfn 11 ph\u00fat \u0111\u1ec3 \u0111\u1ebb xong 1 qu\u1ea3 tr\u1ee9ng. Tr\u1ee9ng m\u1edbi \u0111\u1ebb c\u00f3 m\u00e0u tr\u1eafng nh\u1ea1t sau chuy\u1ec3n sang h\u01a1i v\u00e0ng. S\u00e2u non tu\u1ed5i 1, 2 ch\u1ec9 \u0103n \u1edf ph\u1ea7n v\u1ecf c\u1ee7a c\u00e2y, sang \u0111\u1ebfn tu\u1ed5i 3, ch\u00fang b\u1eaft \u0111\u1ea7u t\u1ea5n c\u00f4ng v\u00e0o ph\u1ea7n l\u00f5i v\u00e0 l\u00e0m c\u00e1c \u0111\u01b0\u1eddng hang trong th\u00e2n c\u00e2y. Nh\u1ed9ng tr\u1ea7n, khi m\u1edbi v\u00e0o c\u00f3 m\u00e0u tr\u1eafng s\u1eefa sau chuy\u1ec3n d\u1ea7n sang m\u00e0u tr\u1eafng v\u00e0ng. Lo\u00e0i X\u00e9n t\u00f3c n\u00e2u xu\u1ea5t hi\u1ec7n v\u1edbi s\u1ef1 g\u1ed1i l\u1ee9a nhau, m\u1ed9t n\u0103m c\u00f3 t\u1eeb 1 \u0111\u1ebfn 2 th\u1ebf h\u1ec7, t\u1eeb n\u1eeda cu\u1ed1i th\u00e1ng 4 \u0111\u1ebfn \u0111\u1ea7u th\u00e1ng 10 \u0111\u1ec1u ghi nh\u00e2n s\u1ef1 xu\u1ea5t hi\u1ec7n c\u1ee7a c\u1ea3 4 pha ph\u00e1t tri\u1ec3n. Giai \u0111o\u1ea1n tr\u01b0\u1edfng th\u00e0nh v\u00e0 tr\u1ee9ng c\u00f3 th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng 8 th\u00e1ng trong n\u0103m v\u00e0 s\u00e2u non \u0111\u01b0\u1ee3c ghi nh\u1eadn xu\u1ea5t hi\u1ec7n \u1edf h\u1ea7u h\u1ebft c\u00e1c th\u00e1ng trong n\u0103m.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> \u0110\u1eb7c \u0111i\u1ec3m sinh h\u1ecdc, Th\u00f4ng m\u00e3 v\u0129, X\u00e9n t\u00f3c n\u00e2u<\/td>\n<\/tr>\n

<\/a>Some biological characteristics of longhorn beetle Monochamus alternatus<\/em> Hope (Coleoptera: Cerambycidae) hamrful Pinus massoniana <\/em>in some province North Vietnam<\/p>\n

By the method of rearing in the laboratory combined with field investigation, some biological characteristics of the species longhorn beetle (M. alternatus<\/em>) have been determined: when rearing in an artificial food environment (to<\/sup>= 25o<\/sup>C, w%=70%), the average life cycle completion time is 222,66 days. When rearing in the environment as natural food (to<\/sup>=28.6o<\/sup>C; w%=78.9%), the average time was 239,8 days. Adult of longhorn beetle lay eggs and when there are larva will see red-brown wood mulch extruding. At first, the body is soft and light brown in color, after about 6 to 12 days of supplementing, the body begins to mature. Adult longhorn beetle lay eggs most concentrated in 2 hours is from 8 to 10 pm and 10 to12 pm and an adult individual can lay 1 – 3 eggs each time, they take from 6 to 11 minutes to lay 1 egg. Eggs: when newly laid are pale white, then turn yellowish. The larvae of ages of 1th, 2th only feed on the bark of the tree, at the age of 3th, they begin to attack the core and make holes in the trunk. Pupa: It is a naked pupa, when it first enters it is milky white and then gradually turns yellowish white. Longhorn beetle species appeared with a litter, 1 to 2 generations a year, from the second half of April to the beginning of October all four stages of development were recorded. The adult and egg stages are active for 8 months of the year and the larvae are reported to appear in most months of the year.<\/p>\n

Keywords:<\/em><\/strong> Biological characteristics, Pinus massoniana, Monochamus alternatus<\/em><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u1ea2NH H\u01af\u1edeNG C\u1ee6A KH\u1ed0I L\u01af\u1ee2NG RI\u00caNG
\nV\u00c0 M\u1ed8T S\u1ed0 \u0110\u1eb6C \u0110I\u1ec2M C\u1ea4U T\u1ea0O \u0110\u1ebeN \u0110\u1ed8 CO R\u00daT NGANG
\nG\u1ed6 XOAN TA (Melia azedarach<\/em> L.)<\/p>\n

<\/a>D\u01b0\u01a1ng V\u0103n \u0110o\u00e0n1*<\/sup>, Nguy\u1ec5n T\u1eed Kim2<\/sup><\/p>\n

1<\/sup>Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc N\u00f4ng L\u00e2m, \u0110\u1ea1i h\u1ecdc Th\u00e1i Nguy\u00ean
\n2<\/sup>Vi\u1ec7n Nghi\u00ean c\u1ee9u C\u00f4ng nghi\u1ec7p 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

S\u1ef1 bi\u1ebfn \u0111\u1ed5i \u0111\u1ed9 co r\u00fat ngang (co r\u00fat xuy\u00ean t\u00e2m v\u00e0 co r\u00fat ti\u1ebfp tuy\u1ebfn) theo h\u01b0\u1edbng t\u1eeb t\u00e2m ra v\u1ecf v\u00e0 m\u1ed1i t\u01b0\u01a1ng quan c\u1ee7a \u0111\u1ed9 co r\u00fat ngang v\u1edbi kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang v\u00e0 m\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m c\u1ea5u t\u1ea1o \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u cho g\u1ed7 Xoan ta 10 tu\u1ed5i tr\u1ed3ng t\u1ea1i t\u1ec9nh Th\u00e1i B\u00ecnh, Vi\u1ec7t Nam. C\u00e1c m\u1eabu g\u1ed7 c\u00f3 k\u00edch th\u01b0\u1edbc 30 (xuy\u00ean t\u00e2m) \u00d7 30 (ti\u1ebfp tuy\u1ebfn) \u00d7 5 (d\u1ecdc th\u1edb) mm \u0111\u01b0\u1ee3c c\u1eaft theo ti\u00eau chu\u1ea9n Nh\u1eadt B\u1ea3n (JIS Z2101 – 1994) t\u1ea1i c\u00e1c v\u1ecb tr\u00ed ch\u00ednh gi\u1eefa v\u00f2ng n\u0103m s\u1ed1 2, 4, 6, v\u00e0 8 t\u1eeb c\u00e1c th\u1edbt g\u1ed7 c\u1eaft t\u1ea1i chi\u1ec1u cao 1,3 m t\u00ednh t\u1eeb m\u1eb7t \u0111\u1ea5t \u0111\u1ec3 \u0111o \u0111\u1ed9 co r\u00fat xuy\u00ean t\u00e2m v\u00e0 ti\u1ebfp tuy\u1ebfn. Gi\u00e1 tr\u1ecb trung b\u00ecnh co r\u00fat xuy\u00ean t\u00e2m v\u00e0 co r\u00fat ti\u1ebfp tuy\u1ebfn l\u1ea7n l\u01b0\u1ee3t l\u00e0 4,40 v\u00e0 7,04%. T\u1ef7 s\u1ed1 gi\u1eefa \u0111\u1ed9 co r\u00fat ti\u1ebfp tuy\u1ebfn\/co r\u00fat xuy\u00ean t\u00e2m l\u00e0 1,62. Theo h\u01b0\u1edbng b\u00e1n k\u00ednh, c\u1ea3 co r\u00fat xuy\u00ean t\u00e2m v\u00e0 co r\u00fat ti\u1ebfp tuy\u1ebfn c\u1ee7a g\u1ed7 Xoan ta \u0111\u1ec1u c\u00f3 xu h\u01b0\u1edbng t\u0103ng d\u1ea7n t\u1eeb t\u00e2m ra v\u1ecf. Chi\u1ec1u d\u00e0y v\u00e1ch t\u1ebf b\u00e0o v\u00e0 \u0111\u01b0\u1eddng k\u00ednh m\u1ea1ch g\u1ed7 \u0111\u1ec1u c\u00f3 m\u1ed1i t\u01b0\u01a1ng quan d\u01b0\u01a1ng v\u1edbi \u0111\u1ed9 co r\u00fat ngang g\u1ed7 Xoan ta. \u0110\u1ed9 co r\u00fat xuy\u00ean t\u00e2m v\u00e0 ti\u1ebfp tuy\u1ebfn t\u0103ng l\u00ean khi kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang g\u1ed7 t\u0103ng. H\u1ec7 s\u1ed1 t\u01b0\u01a1ng quan c\u1ee7a kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang v\u1edbi co r\u00fat xuy\u00ean t\u00e2m l\u00e0 0,78 (P<\/em> < 0,01) v\u00e0 v\u1edbi co r\u00fat ti\u1ebfp tuy\u1ebfn l\u00e0 0,56 (P<\/em> < 0,01).<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> \u0110\u1ed9 co r\u00fat ti\u1ebfp tuy\u1ebfn, \u0111\u1ed9 co r\u00fat xuy\u00ean t\u00e2m, kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang, Xoan ta<\/td>\n<\/tr>\n

<\/a>Effect of air-dry density and some anatomical features on transverse shrinkage of Melia azedarach<\/em> L. wood<\/p>\n

Variation in transverse shrinkage (radial and tangential shrinkages) from pith to bark and the relationships between transverse shrinkage with air-dry density and some anatomical features of 10 – year-old Melia azedarach<\/em> planted in Thai Binh province, Vietnam were examined. Wood samples with dimensions of 30 (radial) \u00d7 30 (tangential) \u00d7 5 (longitudinal) mm were cut at the ring number 2, 4, 6 and 8 from logs cut at 1.3m above the ground according to Japanease industrial standard (JIS Z2101 – 1994). The mean values of radial and tangential shrinkages were 4.40 and 7.04%. The tangential\/radial shrinkage ratio was 1.62. In radial direction, both radial and tangential shrinkages have a trend of gradually increasing from pith to bark. Fiber cell wall thickness and vessel lumen diameter have positive relationships with transverse shrinkage. Radial and tangential shrinkages were increasing when the air-dry density increasing. The coefficients of correlation between air-dry density and radial shrinkage was 0.78 (P<\/em> < 0.01), while this correlation between air-dry density and tangential shrinkage was 0.56 (P<\/em> < 0.01).<\/p>\n

Keywords:<\/em><\/strong> Tangential shrinkage, radial shrinkage, wood density, Melia azedarach<\/em><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>DEVELOPMENT OF AUTOMATIC COLOR RECOGNITION SYSTEM
\nFOR PANEL SURFACE IN LASER SEALING PROCESS<\/p>\n

<\/a>Trong Tuan Nguyen1, 2 <\/sup>*, Jun Hua1<\/sup>, Cong Chi Tran3<\/sup>, Van Tuu Nguyen3<\/sup>,
\nQuoc Huy To2<\/sup>, Tat Thang Nguyen3<\/sup>,\u00a0 Bei Long Zhang1<\/sup>,<\/p>\n

1 <\/sup>College of Mechanical Engineering Northeast Forestry University, Harbin 150040, China
\n2 <\/sup>Vietnam Academy of Forest Sciences, Hanoi 11956, Vietnam
\n3 <\/sup>Vietnam National University of Forestry, Hanoi 156200, Vietnam<\/p>\n\n\n\n\n
SUMMARY<\/p>\n

Automatic color recognition is an important factor to achieve high levels of automation for laser edge banding system in furniture manufacturing. In this article, a color recognition system was designed and evaluated based on the Arduino UNO mainboard and TCS3200 sensor. The TCS3200 sensor was used to detect the color of the product, and the Arduino mainboard was used to read the output frequency and analyze the color result. Eight-panel surfaces with different colors were used to validate the accuracy of the designed system. The results showed that the design system had the ability to accurately identify colors with high stability. Therefore, this result might be applied for developing automatic color recognition systems in the next generations of laser-based edge sealing machine.<\/p>\n

Keywords:<\/em><\/strong> Arduino UNO, color recognition, TCS3200 sensor, laser edge technology<\/td>\n<\/tr>\n

<\/a>Ph\u00e1t tri\u1ec3n h\u1ec7 th\u1ed1ng nh\u1eadn di\u1ec7n m\u00e0u s\u1eafc t\u1ef1 \u0111\u1ed9ng cho b\u1ec1 m\u1eb7t v\u00e1n g\u1ed7 c\u00f4ng nghi\u1ec7p trong m\u00e1y d\u00e1n c\u1ea1nh b\u1eb1ng c\u00f4ng ngh\u1ec7 laser<\/p>\n

Nh\u1eadn d\u1ea1ng b\u1ec1 m\u1eb7t c\u1ee7a v\u00e1n g\u1ed7 c\u00f4ng nghi\u1ec7p t\u1ef1 \u0111\u1ed9ng th\u00f4ng qua m\u00e0u s\u1eafc l\u00e0 m\u1ed9t y\u1ebfu t\u1ed1 quan tr\u1ecdng \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c m\u1ee9c \u0111\u1ed9 t\u1ef1 \u0111\u1ed9ng h\u00f3a cao cho h\u1ec7 th\u1ed1ng m\u00e1y d\u00e1n c\u1ea1nh b\u1eb1ng c\u00f4ng ngh\u1ec7 laser trong s\u1ea3n xu\u1ea5t v\u00e1n \u0111\u1ed3 n\u1ed9i th\u1ea5t. Trong b\u00e0i vi\u1ebft n\u00e0y, h\u1ec7 th\u1ed1ng nh\u1eadn d\u1ea1ng m\u00e0u s\u1eafc \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf, \u0111\u00e1nh gi\u00e1 d\u1ef1a tr\u00ean b\u1ea3n m\u1ea1ch Arduino UNO v\u00e0 c\u1ea3m bi\u1ebfn nh\u1eadn di\u1ec7n m\u00e0u s\u1eafc TCS3200. C\u1ea3m bi\u1ebfn TCS3200 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ph\u00e1t hi\u1ec7n, nh\u1eadn di\u1ec7n m\u00e0u s\u1eafc c\u1ee7a c\u00e1c b\u1ec1 m\u1eb7t s\u1ea3n ph\u1ea9m v\u00e0 b\u1ea3n m\u1ea1ch ch\u1ee7 Arduino \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111\u1ecdc t\u1ea7n s\u1ed1 \u0111\u1ea7u ra v\u00e0 nh\u1eadn k\u1ebft qu\u1ea3 m\u00e0u s\u1eafc. T\u00e1m b\u1ec1 m\u1eb7t t\u1ea5m v\u00e1n v\u1edbi c\u00e1c m\u00e0u s\u1eafc kh\u00e1c nhau \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 x\u00e1c nh\u1eadn \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a h\u1ec7 th\u1ed1ng \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf. K\u1ebft qu\u1ea3 cho th\u1ea5y h\u1ec7 th\u1ed1ng thi\u1ebft k\u1ebf t\u1ef1 \u0111\u1ed9ng nh\u1eadn di\u1ec7n b\u1ec1 m\u1eb7t t\u1ea5m v\u00e1n th\u00f4ng qua m\u00e0u s\u1eafc l\u00e0 ch\u00ednh x\u00e1c v\u1edbi \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh cao. Do \u0111\u00f3, k\u1ebft qu\u1ea3 n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng \u0111\u1ec3 ph\u00e1t tri\u1ec3n h\u1ec7 th\u1ed1ng nh\u1eadn d\u1ea1ng m\u00e0u s\u1eafc b\u1ec1 m\u1eb7t v\u00e1n g\u1ed7 c\u00f4ng nghi\u1ec7p t\u1ef1 \u0111\u1ed9ng trong c\u00e1c th\u1ebf h\u1ec7 ti\u1ebfp theo c\u1ee7a m\u00e1y d\u00e1n c\u1ea1nh d\u00f9ng c\u00f4ng ngh\u1ec7 laser.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Arduino UNO, nh\u1eadn d\u1ea1ng m\u00e0u s\u1eafc, c\u1ea3m bi\u1ebfn TCS3200; m\u00e1y d\u00e1n c\u1ea1nh Laser<\/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 – 2021 1. \u1ee8ng d\u1ee5ng m\u1ed9t s\u1ed1 m\u00e3 v\u1ea1ch ADN trong nh\u1eadn di\u1ec7n Th\u00f4ng xu\u00e2n nha (Pinus cernua L. K. Phan ex Aver., K. S. Nguyen & T. H. Nguyen) Application of DNA barcode in identification of Pinus cernua L. K. Phan ex Aver., K. S. Nguyen […]<\/p>\n","protected":false},"author":12,"featured_media":2223,"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\/2219"}],"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=2219"}],"version-history":[{"count":3,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/2219\/revisions"}],"predecessor-version":[{"id":2224,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/2219\/revisions\/2224"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/media\/2223"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/media?parent=2219"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/categories?post=2219"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/tags?post=2219"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}