{"id":1231,"date":"2014-07-22T16:09:22","date_gmt":"2014-07-22T09:09:22","guid":{"rendered":"http:\/\/vafs.gov.vn\/en\/?p=1231"},"modified":"2014-07-22T16:58:07","modified_gmt":"2014-07-22T09:58:07","slug":"vietnam-journal-of-forest-science-number-2-2014","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/en\/2014\/07\/vietnam-journal-of-forest-science-number-2-2014\/","title":{"rendered":"Vietnam Journal of Forest Science Number 2-2014"},"content":{"rendered":"
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Vietnam Journal of Forest Science Number 2-2014<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
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1<\/p>\n<\/td>\n

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\u0110\u1ed5i m\u1edbi c\u00f4ng t\u00e1c nghi\u00ean c\u1ee9u v\u00e0 chuy\u1ec3n giao gi\u1ed1ng c\u00e2y
\nl\u00e2m nghi\u1ec7p ph\u1ee5c v\u1ee5 t\u00e1i c\u01a1 c\u1ea5u ng\u00e0nh<\/p>\n<\/td>\n

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PGS.TS. Vo\u0303 \u0110a\u0323i Ha\u0309i<\/p>\n<\/td>\n

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Innovation of forest tree improvement to serve the scheme of forest restructuring<\/p>\n<\/td>\n

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2<\/p>\n<\/td>\n

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Nghi\u00ean c\u1ee9u m\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m c\u1ea5u tr\u00fac v\u00e0 t\u00ednh \u0111a d\u1ea1ng sinh h\u1ecdc ki\u1ec3u r\u1eebng k\u00edn th\u01b0\u1eddng xanh h\u1ed7n giao c\u00e2y l\u00e1 r\u1ed9ng, c\u00e2y l\u00e1 kim t\u1ea1i V\u01b0\u1eddn Qu\u1ed1c gia Bidoup – N\u00fai B\u00e0<\/p>\n<\/td>\n

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Nguy\u1ec5n Tr\u1ecdng B\u00ecnh<\/p>\n<\/td>\n

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Research on forest structure characteristics and biodiversity of closed evergreen mixed broad and needle leaf forest type in Bidoup – Nui Ba National Park<\/p>\n<\/td>\n

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3<\/p>\n<\/td>\n

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Nghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng v\u00f4 t\u00ednh c\u00e2y C\u00f3c h\u00e0nh, Tr\u00f4m ph\u1ee5c v\u1ee5 tr\u1ed3ng r\u1eebng tr\u00ean \u0111\u1ea5t c\u00e1t v\u00f9ng kh\u00f4 h\u1ea1n<\/p>\n<\/td>\n

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Ph\u1ea1m Th\u1ebf D\u0169ng<\/p>\n<\/td>\n

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Vegetative propagation of Azadirachta ninh thuan<\/i> and Sterculia<\/i> to serve plantation on sandy soil in dry regions<\/p>\n<\/td>\n

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4<\/p>\n<\/td>\n

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Kh\u1ea3 n\u0103ng c\u1ea3i thi\u1ec7n v\u1ec1 kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang v\u00e0 h\u00e0m l\u01b0\u1ee3ng cellulose c\u1ee7a Keo l\u00e1 li\u1ec1m trong kh\u1ea3o nghi\u1ec7m h\u1eadu th\u1ebf th\u1ebf h\u1ec7 1 t\u1ea1i Cam L\u1ed9, Qu\u1ea3ng Tr\u1ecb<\/p>\n<\/td>\n

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Ph\u1ea1m Xu\u00e2n \u0110\u1ec9nh,
\nPh\u00ed H\u1ed3ng H\u1ea3i,
\nNguy\u1ec5n Ho\u00e0ng Ngh\u0129a,
\nLa \u00c1nh D\u01b0\u01a1ng,
\nNguy\u1ec5n Qu\u1ed1c To\u1ea3n v\u00e0 D\u01b0\u01a1ng H\u1ed3ng Qu\u00e2n<\/p>\n<\/td>\n

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Genetic control on wood density and cellulose content of Acacia crassicarpa<\/i> in the first – generation progeny test at Cam Lo – Quang Tri<\/p>\n<\/td>\n

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5<\/p>\n<\/td>\n

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K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u b\u01b0\u1edbc \u0111\u1ea7u v\u1ec1 \u1ea3nh h\u01b0\u1edfng c\u1ee7a th\u00e0nh ph\u1ea7n ru\u1ed9t b\u1ea7u v\u00e0 \u00e1nh s\u00e1ng \u0111\u1ebfn sinh tr\u01b0\u1edfng c\u00e2y con M\u1ecf chim giai \u0111o\u1ea1n v\u01b0\u1eddn \u01b0\u01a1m<\/p>\n<\/td>\n

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Nguy\u1ec5n Vi\u1ec7t C\u01b0\u1eddng, Nguy\u1ec5n Minh Ng\u1ecdc,
\nPh\u1ea1m \u0110\u1ee9c Tu\u1ea5n<\/p>\n<\/td>\n

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Effect of fertilizer and rate of light cover on growth of Cleidion spiciflorum<\/i> seedlings in nursery<\/p>\n<\/td>\n

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6<\/p>\n<\/td>\n

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Nghi\u00ean c\u1ee9u \u1ea3nh h\u01b0\u1edfng c\u1ee7a ph\u00e2n b\u00f3n \u0111\u1ebfn sinh tr\u01b0\u1edfng c\u1ee7a r\u1eebng tr\u1ed3ng keo lai (Acacia mangium<\/i> \u00b4 Acacia auriculiformis)<\/i> t\u1ea1i C\u00f4ng ty L\u00e2m nghi\u1ec7p Tam Thanh –
\nPh\u00fa Th\u1ecd<\/p>\n<\/td>\n

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Ph\u1ea1m Duy Long,
\nLuy\u1ec7n Th\u1ecb Minh Hi\u1ebfu<\/p>\n<\/td>\n

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Study on influences of fertilizer to growth of Acacia hybrid<\/i> plantation in Tam Thanh Forestry Company – Phu Tho province<\/p>\n<\/td>\n

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7<\/p>\n<\/td>\n

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Micromorphological study
\non the leaf epidermis of Schizostachyum nees<\/i>
\nfrom Vietnam<\/p>\n<\/td>\n

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Tran Van Tien,
\nNguyen Hoang Nghia
\nand Nianhe Xia<\/p>\n<\/td>\n

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\u0110\u1eb7c \u0111i\u1ec3m h\u00ecnh th\u00e1i t\u1ebf b\u00e0o bi\u1ec3u b\u00ec chi N\u1ee9a \u1edf Vi\u1ec7t Nam<\/p>\n<\/td>\n

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8<\/p>\n<\/td>\n

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M\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m l\u00e2m h\u1ecdc c\u1ee7a c\u00e2y Mun (Diospyros mun<\/i> <\/i>A.Chev. Ex Lecomte)
\n\u1edf V\u01b0\u1eddn Qu\u1ed1c gia C\u00fac Ph\u01b0\u01a1ng<\/p>\n<\/td>\n

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Ng\u00f4 V\u0103n Nh\u01b0\u01a1ng<\/p>\n<\/td>\n

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Some silvicultural characteristics of Diospyros mun<\/i>\u00a0A.Chev. ex Lecomte in Cuc Phuong National Park<\/p>\n<\/td>\n

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9<\/p>\n<\/td>\n

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Nghi\u00ean c\u1ee9u kh\u1ea3 n\u0103ng l\u01b0u tr\u1eef c\u00e1c bon c\u1ee7a r\u1eebng Kh\u1ed9p t\u1ea1i T\u00e2y Nguy\u00ean<\/p>\n<\/td>\n

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V\u0169 \u0110\u1ee9c Qu\u1ef3nh,
\nVo\u0303 \u0110a\u0323i H\u1ea3i<\/p>\n<\/td>\n

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Study on carbon storage ability of dry Dipterocarp forest in Central Highlands in Vietnam<\/p>\n<\/td>\n

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10<\/p>\n<\/td>\n

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Sinh kh\u1ed1i v\u00e0 gi\u00e1 tr\u1ecb n\u0103ng l\u01b0\u1ee3ng r\u1eebng Tr\u00e0m \u1edf Long An<\/p>\n<\/td>\n

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Ph\u1ea1m Th\u1ebf D\u0169ng,
\nV\u0169 \u0110\u00ecnh H\u01b0\u1edfng<\/p>\n<\/td>\n

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Biomass and calorific of Melaleuca <\/i>plantation in Long An<\/p>\n<\/td>\n

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11<\/p>\n<\/td>\n

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Kh\u1ea3 n\u0103ng gi\u1eef n\u01b0\u1edbc, b\u1ed1c v\u00e0 tho\u00e1t h\u01a1i n\u01b0\u1edbc c\u1ee7a r\u1eebng tr\u1ed3ng Cao su (Hevea brasiliensis<\/i>)
\n\u1edf v\u00f9ng B\u1eafc Trung b\u1ed9<\/p>\n

\n<\/td>\n

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Tr\u01b0\u01a1ng T\u1ea5t \u0110\u01a1,
\nV\u01b0\u01a1ng V\u0103n Qu\u1ef3nh, Ph\u00f9ng V\u0103n Khoa<\/p>\n

\n<\/td>\n

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Water holding capacity, vaporization and transpiration of rubber plantation (Hevea brasiliensis<\/i>) in North Central region<\/p>\n<\/td>\n

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12<\/p>\n<\/td>\n

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Th\u00e0nh ph\u1ea7n lo\u00e0i v\u00e0 hi\u1ec7n tr\u1ea1ng b\u1ea3o t\u1ed3n chi \u0110\u1ed7 quy\u00ean (Rhododendron<\/i> L.) \u1edf L\u00e2m \u0110\u1ed3ng<\/p>\n<\/td>\n

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N\u00f4ng V\u0103n Duy,
\nTr\u1ea7n Th\u00e1i Vinh,
\nV\u0169 Kim C\u00f4ng,
\nQu\u00e1ch V\u0103n H\u1ee3i,
\n\u0110\u1eb7ng Th\u1ecb Th\u1eafm,
\nNguy\u1ec5n Th\u1ecb Huy\u1ec1n,
\nTr\u1ea7n V\u0103n Ti\u1ebfn
\nv\u00e0 Ng\u00f4 S\u1ef9 Long<\/p>\n<\/td>\n

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A synopsis and consevation status of the genus Rhododendron<\/i> L. in Lam Dong province<\/p>\n<\/td>\n

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13<\/p>\n<\/td>\n

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\u1ee8ng d\u1ee5ng k\u1ef9 thu\u1eadt ph\u00e2n lo\u1ea1i \u1ea3nh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng nh\u1eb1m ph\u00e2n lo\u1ea1i tr\u1ea1ng th\u00e1i r\u1eebng theo Th\u00f4ng t\u01b0 s\u1ed1 34<\/p>\n<\/td>\n

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Nguy\u1ec5n V\u0103n Th\u1ecb,
\nTr\u1ea7n Quang B\u1ea3o<\/p>\n<\/td>\n

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Applying object – base imagery classification technique to classify forest status based on circular No.34<\/p>\n<\/td>\n

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\u00a0\"TC<\/a>
\n\u00a0<\/i><\/p>\n\n\n\n\n
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\u00a0<\/i><\/p>\n<\/td>\n

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\u00a0<\/i><\/p>\n

Keyword: Forest tree improvement, achievement, stategy of research and development, forest restructuring <\/i><\/p>\n

\u00a0<\/i><\/p>\n<\/td>\n

Innovation of forest tree improvement to serve the scheme of forest restructuring<\/p>\n

PGS.TS. Vo\u0303 \u0110a\u0323i Ha\u0309i
\nGia\u0301m \u0111\u00f4\u0301c Vi\u00ea\u0323n Khoa ho\u0323c L\u00e2m nghi\u00ea\u0323p Vi\u00ea\u0323t Nam<\/i><\/i><\/p>\n

Forest tree improvement pays an important role in intensive plantations. For many years ago, significant achievements of forest tree improvement in Vietnam were as follow: (1) Some tree species with promising provenances were selected for some main ecological regions; (2) Breeding strategy of each promissing species was set up to improve the MAI of plantations and quality of end products. (3) Breeding populations, seed orchards, seed production areas, Hedge orchards and gene banks were established for some main planting species to supply the high quality seeds for plantation programs and genetic materials for further breeding programs; Application of biotechnology in identify of clone, outcrossing rate, genetic diversity of breeding population and use of DNA maker were implemented; Vegetative propagation by cutting and tisue culture were successfully studied and then the techniques and original germplasms were transferred to production units. Usefull germplasms were Acacia and Eucalyptus clones and hybrid clones for low land and highland areas, dry – zone acacias for dry sandy soil, Melaleuca species for waterlogged sulphate acid soils and clones of Pinus merkusii <\/i>with high resin yield.<\/p>\n

However forest tree improvement still did not meet the large requirement from production units, such as few approved germplasms tranferred to production units and lack of propagation populations and management of germplasms in provincial level. To serve the Scheme of Forest Restructuring, the forest tree improvement must implement as a linkage model including quantitative genetics, molarcular genetics, wood science, silviculture and tree pathology. Priorities of breakthrough researchs should be focused on selection, directional pollination, creation of polyploid and trippoid germplasms of main planting species, selection of suitable germplasms for each major areas and end – use products, and harsh environment and disease resistance. Results from researchs will be transferred as soon as possible by cooperating with forest extention services. Application of new technologies, such as DNA marker, gene transfer, creation of artificial embryos, stimulation of early flowering and mini – cutting, will encourage for increase of breeding effect and to shorten breeding cycles. Estabilishment of high quality seed production areas, seed orchards, hedge orchards, seed store and gene bank in major areas of plantations will be implemented in next few years for increase of supply of good seeds and germplasms to production units, research, gene conservation as well as international exchange of genetic materials.<\/p>\n

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\n\n\n\n
Key words: Bidoup –
\nNui Ba National Park, biodiversity<\/td>\n		Research on forest structure characteristics and biodiversity of closed evergreen mixed broad and needle leaf forest type in Bidoup – Nui Ba National Park<\/p>\n

Nguy\u1ec5n Tr\u1ecdng B\u00ecnh
\n<\/i>Khoa L\u00e2m h\u1ecdc – Tr<\/i>\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/i><\/i><\/p>\n

Bidoup – Nui Ba National Park is one of the four national biodiversity centers of Vietnam and the place contenting significantly scientific value. Tree species composition ranged from 36 – 50 species and there were more than 4 species that participated in composition formula to creat many different dominances following height belt. With having the average density of 203 trees per plot, the distribution of tree number and diameter (N\/D1.3<\/sub>) conformed to decreased distribution rule; meanwhile, the distribution of N\/Hvn<\/sub> did not conform any researched rules. Biodiversity in the region was considered high with 61 species were recorded in the total of 1,833 individual trees belonging to 27 families and many different life forms. Regeneration trees had some primarily species engaged in compostion formula such as: Castanopsis echidnocarpa, Symplocos racemosa, Rhododendron klossii, Eriobotrya angustissima<\/i> and Craibiodemdron heryi<\/i>. Average density of tree regeneration was 20.516 trees perha and divided into 4 height classes with the largest proportion (accounting for nearly 40%) at the height class of 1 – 2m. Natural regeneration was influenced sigfinicantly by the group factors of shrubs, vegetation, and terrian while the cover rate had negligible impact.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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\u00a0<\/i><\/p>\n

Keywords: Cutting, vegetative propagation, dry region<\/p>\n

\u00a0<\/i><\/p>\n<\/td>\n

Vegetative propagation of Azadirachta<\/i> ninh thuan<\/i> and Sterculia<\/i> to serve plantation on sandy soil in dry regions<\/p>\n

Ph\u1ea1m Th\u1ebf D\u0169ng<\/i>
\nVi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Nam b\u1ed9<\/i><\/p>\n

The vegetative propagation of Azadirachta ninh thuan<\/i> and Sterculia<\/i> will supply materials for re – planting on sandy soil in dry regions, reduce the cost of afforestation and surmount difficulty from seed store of these species because of high oil and resin content in the seeds. This paper introduced some of research results about cutting techniques of both species including: selection of nursery bed, cutting\u2019s quality and treating with stimulant. The results show that sandy bed using is better than sandy : ash (rate 1 : 1) bed for cutting, because it\u2019s rooted rate is 29% to compare 22% and meristem rate is 33.3% to compare 25%, even the long of roots is better. The top of branches for cutting and IBA (500ppm) stimulant are suitable for Azadirachta ninh thuan<\/i> propagation, because rooted rate is 28% (T2<\/sub>G1<\/sub>) to compare 16.7% (T1<\/sub>G1<\/sub>) while NZM is good stimulant for cutting of Sterculia<\/i> and easy to buy in market.<\/p>\n

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Keywords: Acacia crassicarpa, progeny test, heristablity, wood density, cellulose content<\/i><\/i><\/p>\n<\/td>\n

Genetic control on wood density and cellulose content of Acacia crassicarpa<\/i> in the first – generation progeny test at Cam Lo – Quang Tri<\/p>\n

Ph\u1ea1m Xu\u00e2n \u0110\u1ec9nh1<\/sup>, Ph\u00ed H\u1ed3ng H\u1ea3i2<\/sup>, Nguy\u1ec5n Ho\u00e0ng Ngh\u0129a2<\/sup>,
\nLa \u00c1nh D<\/i>\u01b0\u01a1ng2<\/sup>, <\/i>Nguy\u1ec5n Qu\u1ed1c To\u1ea3n3<\/sup> v\u00e0 D<\/i>\u01b0\u01a1ng H\u1ed3ng Qu\u00e2n3<\/sup><\/i>
\n<\/sup><\/i>1<\/sup><\/i>Trung t\u00e2m Khoa h\u1ecdc L\u00e2m nghi\u1ec7p B\u1eafc Trung B\u1ed9 – Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n2<\/sup> Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n3<\/sup> Vi\u1ec7n Nghi\u00ean c\u1ee9u Gi\u1ed1ng v\u00e0 CNSH L\u00e2m nghi\u1ec7p<\/i><\/i><\/p>\n

\u00a0<\/i><\/p>\n

This research on genetic control on growth, stem straightness, wood density and cellulose content of Acacia crassicarpa <\/i>was implemented <\/i>in the first – generation progeny test at Cam Lo, Quang Tri. The results showed that at age of 10 year old, growth traits and stem straightness, wood density and cellulose content were significant difference between families (Fpr. < 0.001), but not significantly between provenances in the Cam Lo test. Narrow – sense heristablities of growth traits and stem straightness were low – medium values (ranged from 0.19 to 0.24). Meanwhile, the heristablities of wood density and cellulose content were higher and ranged from 0.39 to 0.74. Selection of 10% of the families resulted in gain varying from 2.0 to 5.0% for growth traits and 3.5 – 13.5% for wood density and cellulose content. Because of negative, low and non – significant correlations between growth traits and wood properties (ra<\/sub> and rp<\/sub>= – 0.04\u00f7 – 0.14), selection of families with high growth traits as well as high wood density and cellulose content could be practically. Our results also improved that two families (numberred 7 and 79) performed high growth rate, high wood density and cellulose content. Therefore, they should be deployed in the future commercial plantations.<\/p>\n

The genotypic and phenotypic correlations between wood density and cellulose content were high (0.73\u00f70.89), so using wood density as selection traits would be an indirect trait in improvement of cellulose content of A. crassicarpa<\/i>. Similarly, strong and significant correlations between wood density in heartwood and sapwood (0.72\u00f70.90) indicated that juvenile wood density is a good genetic indicator of this trait in older trees.<\/p>\n

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\u00a0<\/i><\/p>\n<\/td>\n

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Keywords: Cleidion spiciflorum species, tube – inner component, rate of light cover.<\/i><\/i><\/p>\n

\u00a0<\/i><\/p>\n

\u00a0<\/i><\/p>\n<\/td>\n

Effect of fertilizer and rate of light cover on growth of Cleidion spiciflorum<\/i> seedlings in nursery<\/p>\n

Nguy\u1ec5n Vi\u1ec7t C\u01b0\u1eddng1<\/sup>, Nguy\u1ec5n Minh Ng\u1ecdc1<\/sup>, Ph\u1ea1m \u0110\u1ee9c Tu\u1ea5n2
\n1<\/sup>Vi\u1ec7n Nghi\u00ean c\u1ee9u Gi\u1ed1ng v\u00e0 C\u00f4ng ngh\u1ec7 Sinh h\u1ecdc L\u00e2m nghi\u1ec7p
\n2<\/sup>Vi\u1ec7n Nghi\u00ean c\u1ee9u v\u00e0 Ph\u00e1t tri\u1ec3n C\u00f4ng ngh\u1ec7 N\u00f4ng L\u00e2m nghi\u1ec7p Th\u00e0nh T\u00e2y<\/i><\/i><\/p>\n

The article presents initial results on producing seedling of Cleidion spiciflorum <\/i>species, including: tube – inner component and rate of light cover for producing seedling in three months stage. The research results show that: (1) Cleidion spiciflorum <\/i>seedlings are rather discerning to decomposed muck. 10% decomposed muck need to be in tube – inner component, so it is good result for seedling growth. (2) Cleidion spiciflorum <\/i>species are light demander. However, in four months stage the rate of light cover should be 25% for seedlings.<\/p>\n

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\u00a0<\/i><\/p>\n

Key words: Acacia hybrid, fertilizer, growth, Tam Thanh Forestry Company.<\/i><\/i><\/p>\n<\/td>\n

Study on influences of fertilizer to growth of Acacia hybrid<\/i> plantation in Tam Thanh Forestry Company – Phu Tho province<\/p>\n

Ph\u1ea1m Duy Long1<\/sup>,Luy\u1ec7n Th\u1ecb Minh Hi\u1ebfu2<\/sup>
\n1<\/sup>Trung t\u00e2m Nghi\u00ean c\u1ee9u B\u1ea3o v\u1ec7 r\u1eebng
\n2<\/sup>Cao \u0111\u1eb3ng N\u00f4ng nghi\u1ec7p v\u00e0 PTNT B\u1eafc b\u1ed9<\/i><\/i><\/p>\n

Study on influences of fertilizer to growth capacity and productivity of Acacia hybrid<\/i> plantation in Tam Thanh forestry company, Phu Tho province shown that controled experiment (non fertilizer) has the highest living rate in the first year and the fourth year with living rate is respectively 92,6% and 90,6%. While, living rate in experiments having NPK fertilizer only get from 82,6% to 90,6%. This result has caused by fertilizing so such NPK fertilizer leading to death a number of Acacia hybrid<\/i>. Growing capacity of Acacia hybrid<\/i> in the first experiment fertilizing 100g NPK + 400g Song Gianh organic microbial fertilizer and the second experiment fertilizing 500g Song Gianh organic microbial fertilizer have been the best effect to diameter growth at the fourth year with average diameter (10,82 centimeter); the first experiment which fertilize 300g NPK and the second experiment fertilizing 100g NPK + 400 Song Gianh organic microbial fertilizer have been the best effect to height growth at four year with average heigh (10,52 meter). Base on real productivity, at the fourth year, the second experiment fertilizing 100g NPK + 400g and the third experiment fertilizing 500g Song Gianh organic microbial fertilizer have been the most significant productivity, reach to over 18,9m3<\/sup> perha per year, it is about 22% to 29% higher than controled experiment.<\/p>\n

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Keywords: Hairs – microhairs, scanning electron microscopy, stomata, Schizostachyum.<\/i><\/i><\/p>\n<\/td>\n

\n

MICROMORPHOLOGICAL STUDY ON THE LEAF EPIDERMIS OF Schizostachyum<\/i> nees<\/i> FROM VIETNAM<\/p>\n

Tran Van Tien1<\/sup>, Nguyen Hoang Nghia2<\/sup> and Nianhe Xia3
\n1<\/sup>Da Lat University
\n2<\/sup>Vietnamese Academy of Forest Sciences
\n3<\/sup>South China Botanical Garden<\/i><\/i><\/p>\n

The foliage leaf epidermis of 13 Schizostachyum <\/i>species from Vietnam was investigated by using scanning electron microscopy. The results indicated that hairs – microhairs commonly seen and consist of three types such as long hairs, geniculate hairs, and spines hairs; the stomata of all species on the lower epidermis are larger, elliptical in shape and arranged in 2 – 5 rows on each side of a vein, each stoma covers finger – like protuberances (papillae) which come forth from the epidermal cells next to the epidermal cells, incline towards the center of stoma. However, the stomata on the lower epidermis covers finger – like protuberances and hairs – microhairs between leaf blades of different species. These characters were of taxonomic significance at the specific species level.<\/p>\n

\u00a0<\/i><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

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<\/i>Keywords: Diospyros mun\u00a0A.Chev. ex Lecomte, silvicultural characteristics, Cuc Phuong National Park.<\/p>\n

\u00a0<\/i><\/p>\n<\/td>\n

\n

Some silvicultural characteristics of Diospyros mun<\/i>\u00a0A.Chev. ex Lecomte in Cuc Phuong National Park<\/p>\n

Ng\u00f4 V\u0103n Nh\u01b0\u01a1ng
\nS\u1edf Khoa h\u1ecdc v\u00e0 C\u00f4ng ngh\u1ec7 Ninh B\u00ecnh<\/i><\/i><\/p>\n

Diospyros mun<\/i>\u00a0A.Chev. ex Lecomte a large timber species, which has high economic and biological value. In Vietnam’s Red Book, it is endangered at upcoming and in the World Red Book, it is placed on the critically endangered, should be preserved. Research results silvicutural characteristics of Diospyros mun<\/i>\u00a0at Cuc Phuong National Park showed that, this species\u00a0is distributed on Renzin yellow, brown yellow or yellow feralitic soils, with soil depth from 1.0 to 1.6 meters, relatively high humus content, soil pH = 5 – 6.5, It grows scattered or form clumps in high scrub jungle or on the limestone mountains with elevations below 700 meters. In the natural forest, Diospyros mun<\/i>\u00a0usually grows with other tree species such as Nephelium chryseum, Dimocarpus fumatus, Callophyllum ceriferum, Sinosideroxylon racemosum <\/i>and random relationship with these species. Diospyros mun<\/i> is the dominant species in which values \u200b\u200bcan be IV = 11.02% to be greater than 4 other dominant species and less than Nephelium chryseum<\/i> species (IV% is 12.96%). Mun has the ability to regenerate whole seeds (86%) and shoots (14%) relatively good.<\/p>\n

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\n\n\n\n
Keyword: Carbon,
\nCarbon storage,
\nCentral Highlands,
\nDry dipterocarps forest.<\/p>\n

\u00a0<\/i><\/p>\n<\/td>\n

Study on carbon storage ability of dry dipterocarp forest in Central Highlands in Vietnam<\/p>\n

V\u0169 \u0110\u1ee9c Qu\u1ef3nh1<\/sup>, Vo\u0303 \u0110a\u0323i H\u1ea3i2<\/sup><\/i>
\n1 <\/sup>H\u1ea1t Ki\u1ec3m l\u00e2m V\u1ecb Xuy\u00ean – H\u00e0 Giang
\n2 <\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/i><\/p>\n

The results of this study show that carbon stocks in six major woody species in dipterocarp forest concentrate mainly in stems which account for from 49.38% to 94.95%, following by carbon stocks in branches which range from 13.25% to 21.50%; carbon stocks in roots range from 11.51% to 15.88% and carbon stocks in bark account for from 7.2% to 17.84%. Carbon stocks in leaves, on the other hand, account for from 1.54% to 3.72%. Carbon storages in major woody species vary widely between stem diameter groups as well as species. In average, the highest amount of carbon storages in individual trees is 243.41kg tree-1<\/sup>, which belongs to Dipterocarpus obtusifolius<\/i>, following by carbon storage in individual trees of Dipterocarpus tuberculatus<\/i> (212.59kg tree-1<\/sup>). By comparison, the figures for the other major species rage from 149.26kg tree-1<\/sup> to 166.58kg tree-1<\/sup>. The rate of carbon below ground and carbon aboveground of individual trees is 0.19. The results of study on carbon structure reveal that 67.08% and 28.39% of total carbon in dipterocarp forest are carbon in soil and woody species, respectively, while the others carbon pools account for only 4.53%. In average the carbon storage in dipterocarp forest in Central Highlands in Vietnam is 84.52 tons C ha-1<\/sup>. The study also establishes some allometric equations to estimate carbon sequestration of dipterocarp forest in Central Highlands in Vietnam.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n


<\/i><\/p>\n

\n

\u00a0<\/i><\/p>\n\n\n\n\n

<\/i>Keyword: Allowmetric equation, biomass,Melaleuca, calorific<\/p>\n

\u00a0<\/i><\/p>\n<\/td>\n

BIOMASS AND CALORIFIC OF MELALEUCA<\/i> PLANTATION IN LONG AN<\/p>\n

Ph\u1ea1m Th\u1ebf D\u0169ng, V\u0169 \u0110\u00ecnh H\u01b0\u1edfng
\nVi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Nam B\u1ed9<\/i><\/i><\/p>\n

The study was carried out with the object of estimating biomass and developing algometric equation for biomass partioning of Melaleuca<\/i> species planted in Long An province at different sites and provenances, and analyzing chemical contents of Melaleuca<\/i> wood to evaluate the calorific of its. All of the trees in 45 plots were measured for height and diameter at breast height and 30 sample trees were harvested for biomass components analysis, and 36 wood Melaleuca<\/i> samples were collected and analized. Results shown that there was significant relationship between biomass components and diameter at breast height and dried biomass components of stem such as 68% for Melaleuca cajuputi<\/i> and 65% for Melaleuca leucadendra, <\/i>and the order to follwed by branches, bark and foliages occuppied 6% for Melaleuca cajuputi<\/i> and 5% for Melaleuca leucadendra, <\/i>respectively. Chemical contents were almost higher than poplar tree and calorific of Melaleuca cajuputi<\/i> wood was 7,320 Cal\/g and Melaleuca leucadendra <\/i>wood was 7,650 Cal\/g.<\/p>\n

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Key words: Rubber plantation, forest environment, water holding capacity, water vaporization, water inspiration.<\/p>\n

\u00a0<\/i><\/p>\n<\/td>\n

Water holding capacity, vaporization and transpiration of rubber plantation (Hevea brasiliensis<\/i>) in North Central region<\/p>\n

Tr\u01b0\u01a1ng T\u1ea5t \u0110\u01a11<\/sup>, V\u01b0\u01a1ng V\u0103n Qu\u1ef3nh2<\/sup>, Ph\u00f9ng V\u0103n Khoa2
\n[1]<\/b><\/sup> NCS Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p;
\n2 Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p;<\/i><\/i><\/p>\n

This paper presents research result on water holding capacity, water vaporization and transpiration of rubber plantation (Hevea brasiliensis<\/i>) in North Central region. The study indicated that water holding capacity of rubber plantation range from 3,830 to 4,021 m3<\/sup>\/ha, which is higher than Acacia manguim<\/i> plantation and lower than natural forests. Vaporization of rubber plantation is 8,061kg\/ha\/day for a day without rain. Intensity of transpiration is 2.31 g\/min for a kg of rubber leaves and it is 20.6 ton\/ha\/day on average for a day without rain. Transpiration of rubber plantation is range from\u00a0 711.7 to 5,935.8 m3<\/sup>\/ha\/year and not clear different in term of statistic compare to that of acacia plantation. Water holding capacity, water vaporization and transpiration of rubber plantation much vary depending on the ages of plantations, which largely depends on characteristic structure of plantation such as canopy cover of tree layer; shrub layers coverage, green litter and quantity and distribution of dried litter on forest ground. The differece between structural characteristics of rubber plantation and situation of control forests is leading to the different in water holding capacity, water vaporization and transpiration of rubber plantation.<\/p>\n

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<\/i><\/p>\n\n\n\n\n\n

Key words: Rhododendron, a synopsis, distribution, conservation status,
\nLam Dong province.<\/p>\n

\u00a0<\/i><\/p>\n<\/td>\n

A synopsis and consevation status of the genus Rhododendron<\/i> L. in Lam Dong province<\/p>\n

N\u00f4ng V\u0103n Duy1<\/sup>, Tr\u1ea7n Th\u00e1i Vinh1<\/sup>, V\u0169 Kim C\u00f4ng1<\/sup>, Qu\u00e1ch V\u0103n H\u1ee3i1<\/sup>,
\n\u0110\u1eb7ng Th\u1ecb Th\u1eafm1<\/sup>, Nguy\u1ec5n Th\u1ecb Huy\u1ec1n1<\/sup>, Tr\u1ea7n V\u0103n Ti\u1ebfn2<\/sup> v\u00e0 Ng\u00f4 S\u1ef9 Long2
\n1<\/sup>Vi\u1ec7n Nghi\u00ean c\u1ee9u Khoa h\u1ecdc T\u00e2y Nguy\u00ean,
\nVi\u1ec7n H\u00e0n l\u00e2m Khoa h\u1ecdc v\u00e0 C\u00f4ng ngh\u1ec7 Vi\u1ec7t Nam
\n2<\/sup>Khoa sinh h\u1ecdc, Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc \u0110\u00e0 L\u1ea1t<\/i><\/i><\/p>\n

A synopsis of the genus Rhododendron<\/i> in Lam Dong province was made by mean of a literature search, consultation of the herbaria specimens, and a survey of several localities through Lam Dong province and Western Plateau of Vietnam. Five species encounted were scatter – distributed in high mountain, at the altitude between 1,500 – 2,400m a.s.l. They were assessed at the national level as Endangered (EN) and Vulnerable (VU) due to over – exploitation and fragmented habitat. Therefore, it needs urgent in situ<\/i> and ex situ<\/i> protection.<\/p>\n

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Keywords: Remote sensing imagery, forest inventory, forest classification, forest status.<\/p>\n

\u00a0<\/i><\/p>\n<\/td>\n

Applying object – base imagery classification technique to classify forest status based on circular No.34<\/p>\n

Nguy\u1ec5n V\u0103n Th\u1ecb, Tr\u1ea7n Quang B\u1ea3o
\nTr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p<\/i><\/i><\/p>\n

This article presents a result of applying object – base imagery classification technique to determine forest status based on Circular No. 34 for 4 communes: Son Kim 1, Son Kim 2, Son Tay and Tay Son in Huong Son district,ha Tinh province. SPOT5 HRS imagery and eCognition Developer and ArcGIS software were used for classification. Applying multi – resolution segmentation algorithm of eCognition Developer to segment the imagery of study area into 29,974 deference objects with ranging areas from 0.05 to 27.8 hectare. To match the definition of forest, the objects under 0,05 hectare were merge into the contiguous larger object that closest texture characteristic. After merging, the number of objects are 17,465 with 0,5 to 27,8 hectare of area. Based on the results of classification indices from ground survey, segmented imagery of SPOT5 were classified into 7 statuses of forest: (1) rich ever – green, (2) medium ever – green, (3) poor ever – green, (4) rehabilitation ever – green, (5) mixed wood and bamboo, (6) plantation and (7) bare land.<\/p>\n

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Key words: Agroforestry, Northwest Vietnam, Walnut market (Carya tongkinensis)<\/p>\n

\u00a0<\/i><\/p>\n

\u00a0<\/i><\/p>\n<\/td>\n

Market study and development potential of Walnut in Northwest Vietnam<\/p>\n

Ho\u00e0ng Th\u1ecb L\u1ee5a1<\/sup>, Delia Catacutan1<\/sup>, Ann Degrande2<\/sup>, Vi\u00ean Kim C\u01b0\u01a1ng3<\/sup>, Chris Harwood4<\/sup><\/i>
\n<\/sup>1<\/sup><\/i>World agroforestry Center Vietnam office, s\u1ed1 8, l\u00f4 13A, \u0110\u01b0\u1eddng Trung H\u00f2a, C\u1ea7u Gi\u1ea5y, H\u00e0 N\u1ed9i<\/i>
\n<\/i>2 <\/sup><\/i>CRAF – West and Central Africa Regional Programme, World Agroforestry Centre, <\/i>
\n<\/i>PO Box 16317, Yaounde, Cameroon<\/i>
\n<\/sup><\/i>3<\/sup><\/i> Chuy\u00ean gia th\u1ecb tr\u01b0\u1eddng<\/i>
\n<\/i>4<\/sup><\/i> CSIRO Sustainable Ecosystem, Private Bag 12, Hobart 7001, Australia<\/i><\/p>\n

Walnut has been identified as a tree species that can grow well at elevations of 1,000masl, similar to areas in Northern upland of Vietnam. The trees produce nutritious nuts that can be stored and transported easily. Walnut appears to be a suitable component in an agroforestry system that can be introduced to address the challenges of shifting cultivation and mono – cropping with short – term food crops in hilly landscape of the region. However, prior to the promotion of agroforestry systems with Walnut, market aspects for Walnut should be studied. This study reports about the current market situation of Walnut in Vietnam, assesses its development potential, and gives recommendation for Walnut production in Northern Vietnam. The market for Walnuts in Vietnam has already been established, with Walnuts distributed through a network of Chinese medicinal shops across the country, mostly in Hanoi and Ho Chi Minh city. The estimated domestic market size of Walnut in Vietnam is around 22,000 tons (in 2011) and entirely imported. Given the high value and large volume of Walnuts being traded in international market, domestic production of Walnut is still absent. Since there is an existing demand for Walnut as a healthy food, the production of Walnut in Vietnam should focus on serving Vietnamese consumers. An additional 5,000ha of Walnut production areas could be established in the next five years, given that 2,000ha will be established in Dong Van\/ha Giang province by 2015. More Walnut production area, on top of the 5,000ha, could be planted if consumers prefer to purchase Vietnamese Walnut products than the imported ones or if the government imposes measure to protect local growers in the form of import tariffs or barriers. In spite of recommendations for domestic production to meet market demand in Vietnam, a detailed production model with associated cost and volume output is to be developed to confirm potential realization of economic value at farm level. Especially when Walnut is planted on steep slope, the cost for tending activities and harvesting should be carefully taken into consideration.<\/p>\n

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<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Vietnam Journal of Forest Science Number 2-2014 1 \u0110\u1ed5i m\u1edbi c\u00f4ng t\u00e1c nghi\u00ean c\u1ee9u v\u00e0 chuy\u1ec3n giao gi\u1ed1ng c\u00e2y l\u00e2m nghi\u1ec7p ph\u1ee5c v\u1ee5 t\u00e1i c\u01a1 c\u1ea5u ng\u00e0nh PGS.TS. Vo\u0303 \u0110a\u0323i Ha\u0309i Innovation of forest tree improvement to serve the scheme of forest restructuring 2 Nghi\u00ean c\u1ee9u m\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m c\u1ea5u tr\u00fac v\u00e0 t\u00ednh \u0111a […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","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\/1231"}],"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\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/comments?post=1231"}],"version-history":[{"count":3,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/1231\/revisions"}],"predecessor-version":[{"id":1238,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/1231\/revisions\/1238"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/media?parent=1231"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/categories?post=1231"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/tags?post=1231"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}