Viet Nam Journal of Forest Science Number 3-2008

 1. Assessment oF THE Suitability of Hopea odorata plantations in Southeast Vietnam

Ngo Dinh Que

Research Center for Forest Ecology and Environment

Forest Science Institute of  Vietnam

SUMMARY

Based on the results of forest inventories, surveys and research into natural conditions and soil characteristings under both Hopea odorata natural forests and plantations in Southeast Vietnam, the research has been able to develop some initial assessments on a number of soil factors that effect the growth and development of Hopea odorata. Based on this, a number of criteia have been proposed which can be applied to rating land eligibility to ensure efficient planting and recovery of Hopea odorata forests in Southeast Vietnam. The research results indicate that the areas of each land eligibility class of Hopea odorata in Southeast Vietnam are as follows:

·        High suitability: 29,57%

·        Moderate suitability: 66,33%

·        Low suuitability: 3,97%

·        Not suitable: 0,13%In conclusion, it is recognized that Southeast Vietnam is the most suitable region to plant Hopea odorata in Vietnam.

Keywords: Plant Suitability, Hopea odorata  

2. The use of molecular techniques to identify fungi

Tran Thanh Trang

Forest Plant Protection Research DivisionForest Science Institute of Vietnam 

SUMMARY

Where as many fungal species have inadequate morphological characteristics for identification, or only posses distinguishing charachteristics in a particular stage of their life cycle, DNA analysis provides some some additional identification abilities. There are a variety of DNA techniques available, and the variations of PCR based techniques are popular because of their sensitivity, speed and use of only very small throughput. Some popular methods are described that have been widely applied in many fields including food, forest ecology, and human, animal and plant pathology. The specific method used for a particular application will depend on a number of factors, including the number of samples and candidate species. All of the DNA based techniques depend on herbarium resources with detailed morphological descriptions to enable veritification of the DNA technique.

Keywords: DNA technique, DNA sequencing, PCR

3. GROWTH OF TEAK PLANTATIONS IN KAMGPONG CHAM PROVINCECAMBODIA 

SUMMARY

This paper presents the results of a growth study on 18 year old Teak plantations growing on red-yellow basalt soil in Kampong Cham province of Cambodia. Growth processes in Teak plantations were examined on 8 trees. The results show that Teak forest grows rapidly for the first eight years after planting and the terrain favorable to Teak forest growth is the middle third.  

4. GLYPTOPETALUM SCLEROCARPUM (KURZ) M.A LAWSON (CELASTRACEAE)  – A NEW RECORD FOR FLORA OF VIETNAM   

Hoang Van Sam

Vietnam Forestry University 

SUMMARY

Glyptopetalum sclerocarpum (Kurz) M.A.Lawson, up until recently only known in Myanmar, Cambodia and Thailand, has been recorded in Vietnam for the first time. The species was collected in Ben En National Park, Nhu Xuan district, Thanh Hoa province in 2006, and the specimens deposited in the herbarium of the Vietnam Forestry University and the National Herbarium of the Netherlands- Leiden University Branch (L).  It’s morphological features are described and compared with authenticated specimens of Glyptopetalum sclerocarpum (Kurz) M.A Lawson in L and descriptions of Celastraceae from around the world, and this species is confirmed as a new record for flora of Vietnam. This species has some special characteristics to distinguish it from other species of Glyptopetalum (Celastraceae). It’s inflorescences are large, up to 10cm long, with many branches and its fruits have scurfy fissures and warts. The proposed Vietnamese name is X©m c¸nh BÕn En to indicate the locality where this species was first collected in Vietnam. This new record of flora in Vietnam brings the total number of taxa of Celastraceae in Vietnam up to 80 species in 13 genera. 

Keywords: Glyptopetalum, Ben En National Park, new species, and Glyptopetalum sclerocarpum (Kurz) M.A Lawson 

5. EFFECTS OF NURSERY TECHNICAL MEASURES ON GROWTH OF Michelia macclurei Dandy SEEDLINGS

Tran Van Do, Tran Lam Dong

Nguyen Toan Thang, Nguyen Ba Van

Silviculture Techniques Research Division

Forest Science Institute of Vietnam 

SUMMARY

Michelia macclurei Dandy is naturally distributed across the Southeast region of China and the Northeast region of Vietnam. It is a large forest tree, and a fast growing species. The species is suitable for mixed-planting with Pinus masssoniana and Cunninghamia lanceolata and the wood can be used for furniture making. As the tree has an attractive crown and fragrant flowers Michelia macclurei Dandy is suitable for ammenity planting in urban areas. Research into producing good quality seedlings for plantations is necessary. Research materials and seeds were imported from China and several experiments were laid out to test three techniques used in seedling production, these being shading intensity, sowing mediam composition and seedling spacing. The trials were observed for nine months, and the recorded factors were Diameter at stump (Dg), Height of seedling (Hvn) and survival rate. The results showed that the most suitable shading intensity is from 50-75%, A-layer forest soul mixed with 1% P2O5 fertilizer is suitable for use as a sowing medium, and seedling spacing does not significantly influence the growth of seedlings. 

Key words: Michelia macclurei Dandy, shading intensity, sowing medium, seedling spacing. 

6. THE EFFECTS CAUSED BY Environmental  FACTORS TO NATURAL REGENERATION AND GROWTH CAPACITY of Michelia mediocris Dandy

Phan Van Thang

Non timber Forest Products Research Centre Forest Science Institute of Vietnam

 

Forest Science Institute of Vietnam 

 

SUMMARY

Environmental conditions are an important factors in the regeneration and growth capacity of forest trees in general, and more specifically Michelia mediocris in Konhanung (Gialai) and Chilang (Langson). The results showed that Michelia mediocris can only regenerate well if it is growing under a forest canopy with 0,3 canopy cover rate. From on early stage, it can grow well under a forest canopy with 0,3-0,5 canopy cover rate, and with deep, damp, rich soil. The initial study results can only be used as direction for future research.Key words: Michelia mediocris, regeneration, growth rate 

7. Assessment oF non – timber forest plant resources in the buffer zone of the Pu Huong Nature Reserve, Nghe An province

Phan Van Tien

The Centre of Natural Resource Conservation and Forest Environment Protection in Nghe An

Nguyen Nghia Thin, Nguyen Thi Kim Thanh

Vietnam National University, Hanoi 

Summary

Non-timber forest plant resources in the buffer zone of the Pu Huong Nature Reserve, Nghe An province were collected and assessed. They include 609 species, 423 genera, and 143 families of 4 divisions: Lycopodiophyta, Polypodiophyta, Gymnospermae and Angiospermae. In them there are 10 species-rich families with 208 species representing 43.21% of total species and 36 families with more than 5 species with 400 species representing 65.79% and 6 species – rich genera from 5-8 species per one with the total of 39 species representing 6.40% of total species. Six hundred and nine species of non – timber forest products in the buffer zones of the Pu Huong Nature Reserve were classified into 9 groups of different uses, of which the group of plants used for medicine is the most diverse (with 455 species); followed by the group of edible plants (143 species including 76 for spice and vegetable, 55 for edible fruit and 12 species for edible starch); the group of ornamental plants (69 species); the group of handicrafts articles (27 species); the group of plants for oil (18 species); the group of  aromatic plants for essential oil (14 species); and the group of plants for tannin and dye (9 species). The most commonly used plant parts are the leaves (276 species); then roots, rhizomes and tubers (206 species); stems (193 species); tree parts – leaves, roots, rhizomes, tuber and stem (92 species); fruit (92 species); bark (45 species); seed (36 species) and flowers (15 species).  

Keywords: Non – timber forest, Pu Huong Nature Reserve 

8. Cutting propagation results from two yellow camellia species: Ba Vi (Camellia tonkinensis) and Son dong (Camellia euphlebia) 

Ngo Quang De, Le Thanh Son

Dinh Thi Le

Vietnam Forestry University, Xuan Mai, Chuong My, Ha Noi 

Summary

Rooting chemicals used to propagate cuttings of Ba Vi yellow flowering Camellia tonkinensis and Son Dong yellow flowering Camellia (Camellia euphlebia) are IAA, IBA, ABT1 with concentrations of 50, 100, and 200ppm. The timing of rooting regulator hormone treatments was 60 minutes. The results showed that all chemicals stimulate root induction. Rooting rates of Ba Vi yellow flowering Camellia range from 30 – 77.8%, and the survival rate including rooting and callusing is 72-97%. Whereas the rooting rate of Son Dong yellow flowering Camellia ranges from 61-80% and survival rates of both rooted trees and callus trees are from 94-100%. The different parts of the branch used for the experiment were the top, middle and base. Results indicate that the survival and rooting rate of the three types of cuttings are similar and can all be used for multiplication. Investigations into seasonal effects showed that spring gives better results than autumn.  Key words: cutting propagation, yellow flowering Camellia

9. RESULTS OF THINING TECHNIQUES DEMONSTRATION MODELS FOR PURE PINUS MASSOSIANA AND MIXED BETWEEN PINUS MASSOSIANA AND ACACIA auriculiformis IN AREA OF KFW1 – PROJECT

Tran Van Con, Nguyen Toan Thang

Silvicultural Techniques Research DivisionForest Science Institute of Vietnam

SUMMARY

The paper presents the results of a thinning techniques demonstration model for pure Pinus massosiana and mixed Pinus massosiana and Acacia auriculiformis plantations funded by KfW1-project in Bac Giang and Lang Son provinces. Data recorded one year after thinning shows that the growth of the forest has been clearly improved. The increment of thinning stands varies between 4-13,46 m3/ha/year, while the average increment of unthinned stands in the same area was approximately  3-7 m3/ha/year.

Keywords: Thining techniques, Pinus massosiana pure stand, mixed stand of Pinus massosiana and Acacia auriculiformis

10. SOCIAL IMPACT ASESSMENT IN VAN CHAN STATE FOREST ENTERPRISEYEN BAI PROVINCE

Vo Dai Hai, Truong Tat Do

Forest Science Institute of Vietnam

SUMMARY 

Sustainable forest management (SFM) and forest certification is a priority of Van Chan State Forest Enterprise, with the aim of effective and sustainable production. However, the Enterprise is facing difficulties in implementing SFM. This assessment aims to support Van Chan State Forest Enterprise to progressively meet the requirements of the SFM criteria of Vietnam FSC. The study has evaluated the interaction between forest management activities of the enterprise and the local socio-economic development factors. Based on the assessment of the satisfactory indicators, the proposed priorities will improve the social criteria.

Keywords: Social impact, Van Chan State Forest Enterprise, Sustainable forest management (SFM), forest certification. 

11. propagation of some recently selected high yielding clones of Tectona grandis (teak)         

Doan Thi Mai, Luong Thi Hoan, Nguyen Thi Thuy Duong

Le Son, Nguyen Thi My Huong, Nguyen Van Long

Research Center for Forest Tree ImprovementForest Science Institute of Vietnam  

SUMMARY 

During 2006 and 2007 high yielding clones of Tectona grandis (teak) were selected by the Research Centre for Forest Tree Improvement-Forest Science Institute of Vietnam, and tissue culture research on the propagation of these clones conducted . This work is essential for the development of research into forestry production. The results of the research indicate that soaking in mercuric chloride (HgCl2) 0,05% solution for 10 minutes was the best method for obtaining Teak shoot sterilization. Suitable seasons for sterilization of teak are spring and summer. Additionally, the MS modified medium with 0,7 mg/l BAP and 0,5 mg/l NAA was suitable for shoot induction. The 1/2 MS modified medium with 1,5mg/l IBA supplementary was used for in-vitro rooting. By using TTG1 Powder in greenhouse condition, rooting percentage for teak reached at least 84,33%. 

Keywords:  Tectona grandis (teak), tissue culture, rooting percentage 

12. Researchinto process particle board from Melaleuca cajuputi and acacia hybrid material 

Bui Duy Ngoc

Forest Products Processing Research DivisionForest Science Institute of Vietnam   

SUMMARY

The consumption of particle board products in the Vietnamese market has been steadily increasing. Melaleuca cajuputi timber is a potential raw product available in the Mekong Delta which could be used to meet the requirements of the particle board production industry. Although some mechanical propertise of particle board products made only of M. cajuputi wood chips meet the requirement of commercial particle board products using the dry conditions, the mixture of M. cajuputi  and A. hybrid woodchips with the rate of 6/4 could be used to make particle products that satisfy the requirements of Vietnamese standard TCVN (P3) for particle products in a humid environment without loading. products are used in the humidity environment without loading.

Keywords: Particle board, Melaleuca cajuputi timber, Acacia hybrid timber

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