Vietnam Journal of Forest Science Number 1-2008

1.                Betula alnoides Buch. Ham. EX D. Don, a potential tree for large scale planting in some areas of Vietnam 

Nguyen Hoang Nghia

Scientific Planning Division

Pham Quang Thu

Forest Plant Protection Research DivisionForest Science Institute of Viet Nam

SUMMARY

Betula alnoides is a large species , deciduous tree reaching 30m height and 85cm diameter at breast height in natural forests and is a heliophilous species, intolerant of shade. It is difficult for this species to regenerate under closed canopies, but it grows well on the sides of newly established roads or on fallow lands after shifting cultivation. Betula alnoides is a tree species that extends in its distribution to the most southern areas in the northern hemisphere. This species is indigenous to China, Lao, Thailand, Myanma, India, Nepal and Vietnam. In Vietnam distribution of the species is in northern moutainous areas such as Lang Son, Son La, Lai Chau, Ha Giang, Quang Ninh…and some other location in high land central up to 1000m elevation in natural forests. The flowers are unisexual and amentaceous. The fruit is up to 12cm long with two to five per raceme, turning gold-yellow or yellow-brown when they ripen. The seed should be stored at low temperature and can maintain their high germination rate for more than two year. Betula adenoides can be planted at density of 1650 or 1100 trees per ha. Betula adenoides plantation grows very fast, with annual increment of 2-2.5cm or even more in diameter breath height and 1.5-2m in height.

Key words: Betula adenoides Buch. Ham. Ex D. Don, distribution, fast growth, potential tree species 

2. Primary research on cutting propagation and germinated seedling grafting of Cammelia sp 

Hoang Van Thang

Silvicultura Techniques Research Division

Doan Thi Mai

ResearchCenter for Forest tree ImprovementForest Science Institute of VietnamSummaryThe initial research results on cutting propagation and germinated seedling grafting of Cammelia sp tree species showed that these are promising techniques. In all hormone used for cutting propagation, NAA with 0,1% resulted in highest rooting rate (72,3%) and cuttings have the highest quality. The most suitable season for cutting propagation of Cammelia sp tree species is in August. For grafting, using stumps of 30-day old seedlings, grafted buds taken from tissue culture and material for fixing graft made from thin copper wire resulted in highest survial rate, 80.0-84.4%.Keywors: cutting propagation, germianated seedling grafting, Cammelia sp species

3. Reducing damage of Hypsiplyla robusta (Moore) shoot borer by shading technique 

Dao Ngoc Quang

Forest Plant Protection Research Division

Forest Science Institute of Vietnam 

Hypsipyla robusta Moore (Lepidoptera: Pyralidae) is the most damaging pest of species of Meliaceae in terms of both level of attack per individual tree and percentage of trees attacked in each plantation causing serious losses in wood quality and yield of plantations of Chukrasia, Toona, Khaya and Swietenia. Hypsipyla species are the greatest obstacle to commercial planting of these timber species. The results presented in this study indicate that host selection occurs during the oviposition process in H. robusta, with larger numbers of eggs being deposited on Chukrasia spp. seedlings grown in relatively high light environments. Furthermore, the mortality of neonate larvae on plants grown under full light conditions was lower than those on plants grown under shade environment. It contributes to manage this insect pest, and enhance productivity and yield plantations.

Keywords: Hypsipyla robusta, Meliaceae, Chukrasia

4. The primary research of fungal disease on some imported imported Eucalypts at the nursery stage

Summary

In the co-operation research program with the Mudorch University, Australia, the seeds of nineteen eucalypt species of 24 provenances were imported into Vietnam. They were sown and planted at the Forest Science Institute of Vietnam nursery to investigate the disease issue. The result showed that 12 species of 14 provenances were infected by diseases at different levels, in which Eucalyptus cleoziana (provenance of Cardwell, Queensland) and E. globulus (provenance of Yamabulla SF New South Wales) were infected by diseases at moderate level and E. obliqua (provenance of Maydena, Tasmania) was seriously infected by diseases at very high level. Besides, nine species of 10 provenances were not infected by disease. Three fungal species of Colletotrichum gloeosporioides, Pestalotiopsis neglecta and Cytospora eucalypticola were identified at this experiment, in which Cytospora eucalypticola was recorded at the first time in Vietnam with the most serious.       

Key words: Eucalypt, fungi, infection level, provenance, species.   

5. A species of Myristica Gronov. (Myristicaceae) a new record for flora of Vietnam 

Hoang Van Sam

Vietnam Forestry University

SUMMARY

Myristica yunnanensis Y.H. Li, up to now only known from South China and North Thailand, is recorded for Vietnam for the first time. The species was collected in Ben En National Park, Nhu Xuan district, Thanh Hoa province in 2006 and deposited in the herbarium of the Vietnam Forestry University and the National Herbarium of the Netherlands- Leiden University Branch (L).  Its morphological features are described and compared with authenticated specimens of Myristica yunnanensis Y.H. in L and description of Myristicaceae from all over the world, this species is confirmed as a new record for flora of Vietnam. The proposed Vietnamese name is Dau khau Ben En to indicate the locality where this species was first collected in Vietnam.This new record for flora of Vietnam brings the total number of taxa of Myristicaceae in Vietnam up to 23 species in 3 genera.

Keywords: Myristica, Ben En National Park, new record, Myristica yunnanensis Y.H. Li

6. Biomass and allometric equations for biomass predicting of Pinus massoniana Lamb planted at different sites in North-East Vietnam

Dang Thinh Trieu

Silvicultural Research Division

Forest Institute of Vietnam

Summary

The study was carried out with the objective of estimating biomass and developing allometric equation for biomass partitioning prediction of Pinus massoniana Lamb planted in North-East Vietnam at different sites and ages. All of the trees in fifty four plots were measured for height and diameter at breast height and two trees each plot were harvested for biomass partitioning analysis. Results shown that dried biomass partitioning of stem, branch, foliage and root occupied 63.5%, 17.7%, 16.6% and 8.2% respectively. Besides some allometric equations were develop for biomass prediction.

Keywords: Allometric equation, biomass, Pinus massoniana.

7. Forest and Forest Land Status and Solutions for Management and Development in Soc Son District, Ha Noi Capital

Nguyen Van Thinh, Bui Thanh Hang

Silvicultural Research DivisionForest Institute of Vietnam 

Summary

In the recent years, forest land trade in Soc Son district has been taken place in many different ways. In order to control this problem, Ha Noi people’s committee entrusted Department of Forest Protection, People’s Committee of Soc Son district and local Forest Management Board with evaluation of current forest and forest land management in different periods. During this process, People’s Committee of Soc Son district has analyzed situation and made clearly character of each period. There were many solutions about the organization of system.

Keywords: Soc Son district, forest and forest land management, solutions for Management 

8. research and determine the suitable planting area Acacia mangium with the purpose of supplying big-sized timber in the North central region of Vietnam

Dang Van Thuyet, Luong The Dung

Scientific Planning Division

Nguyen Thanh Son

Silvicultural Research Division

Forest Institute of Vietnam 

Summary

The objective of this research is to identify the suitable planting area Acacia mangium with the purpose of supplying big-sized timber in the North central region of Vietnam. Groups of factors have been considered in order to determine planting conditions for A. mangium including the climate, soil, topography that is suitable with ecological character of species. Although the research result shows that A. mangium can be planted  for large timber supply in 6 provinces of the North central region of Vietnam, the largest suitable planting area is located in adjoining region of three provinces (Tuyen Quang, Ha Giang and Yen Bai provinces). In entire the North central region of Vietnam, the most suitable planting area account for 550.804ha (17.2%) and the less suitable planting area is 1.224.696ha (38.2%) and the worse suitable planting area is 1.430.811 (44.6%). 

Keywords: Determining planting requirements, Acacia mangium.

9. Quambalaria found in Vietnam and Eucalyptus resistance of soecies/provernanves 

Nguyen Quang Dung, Pham Quang Thu

Forest Science Institute of Vietnam 

Summary

Quambalaria cause leaf and shoot diback diseases seroiusly on Eucalyptus trees in many countries all over the world such as South Africa, Australia, Brasil, Uruguay, China and Thailand. In Vietnam, so far research on this problem has not been carried out yet. Recent desease serveys in some northern provinces of Vietnam have revealed the presence of new Eucalyptus leaf and shoot dieback disease. Some symptoms of the disease resemble those of the disease caused by Quambalaria. Finding out if Quambalaria has occured in Vietnam or not and measures for the problem are vitally pressing. One of the measures for controlling this problem is the selection of species able to be resistant to this disease. 23 Eucalyptus provernances belonging to 18 species coming from Mudorch University in a joint research project between Forest Protection Division, Forest Science Institute of Vietnam and Mudorch University, Australia  are being tested. Results have shown that (1) For the first time, Quambalaria sp is found in Vietnam causing leaf and shoot diback diseases on eucalypt species; (2) 12 provernaces of 10 eucalypt species are initially chosen as ones well resistant to the disease and 11 provernaces of 10 eucalypt species are susceptibe to infection by Quambalaria sp. 

10. Testing result of Mapboxer 30EC effectiveness against Termidormite for construction works 

Nguyen Van Duc, Truong Quang Chinh 

Nguyen Thi Hang

Forest products Preservation Reasearch Division

Forest Science Institute of Vietnam

SUMMARY

Termite is one of the insect species that cause considerable damage to construction works, thus we must prevent their attack. Termite control preparations are necessitated material, Mapboxer 30EC and Termidor are new termite control preparations to be imported into our country. For effective use of these preparations and evaluation of their effectiveness in natural, climatic conditions in Vietnam, testing is needed. Results of Mapboxer 30EC and Termidor testing at concentrations 1.6%, 1.8% and 2%, 2.5% respectively prove that these preparations are effective in termite control in construction works and provide useful scientific base for managers and users of insecticides before imported in Vietnam.

Key words: Plant protection, Termidormite control preparation, Mapboxer 30EC, Termidor.

11. Control techniques of termite on tea tree 

Nguyen Duong Khue

Forest Products Preservation Reasearch Division

Forest Science Institute of Vietnam

Summary The termite on tree species and tea tree effect on yield of them and benifit of production units. The results of test to termite harm on tea tree by infect method which had high effect. This paper introduction control technique of termite on tea treeKeywords: Tea tree, termite

12. Situation and development solutions for forestry expansion ecouragement of Daklak province

Trieu Long Quang, Bui Thi Hai Nhung

Forest Institute Science of Vietnam

Summary

Result of survey on forestry expansion encourgement of Daklak province revealed that agro-forestry expansion system has developer both in scale, contents and forms of activities, contributing on agricultural development of the province. However, forstry expansion encouragment of Daklak received insufficient attention. There has been not separated policies for forest trees, forestry expansion as well as forestry coordinators-in-charge; There has been also short of agro-forestry expansion staff of district level in number and qualification; capital for forestry expansion are limited inscale and budget; some forestry expansion policies are inappropriate. Solutions suggested according to investigation in order to develop forestry expansion encourgement of Daklak particularly, and in Central High generally.Keywords: Forestry expansion, agro-forestry, household, sustainable development 

13. Development of Biodiversity database for Huong Son special-use forest, Ha Tay province 

Hoang Viet Anh

Research Centrer for Forest Ecology and Environment

Le Quoc Huy, Le Thanh Cong

Forest Biology Technogy Center

Forest Scicence Institute of Vietnam

Summary

Huong Son special-use forest is a potential resource for biodiversity conservation and eco-tourism. In this research, biodiversity richness of the area was audited using quantitative approach. Biodiversity index used was: IVI, H, Cd, A/F. Fauna biodiversity was accessed by observation method. Totally, 28 site was surveyed for flora biodiversity with 380 plant species and 178 species recorded.The H index of woody species found to be rather high and stable, ranging from 3.83 to 5,50 while the H of bushes (2,88-5,20) and herbs (1,55-4,22) were greatly varied due to affect of invasive species. To facilitate the management and dissemination of the research result, BioHS (Huong Son Biodiversity database) was developed. The database was developed on MS. Access 2007, and used the free Developer Extension and Runtime to package and create the package installation. GIS data was updated through an Access table and can be viewed using the free MapInfo Proview. BioHS was tested to run stable on low configuration PC and can manage up to 2 G of data

Key words: Huong Son, biodiversity, database, index, H, IVI, Cd.

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