Information on Forest Science and Technology Number 1 2006


Summaries of papers in the bulletin; for more information contact info@fsiv.org.vn

1. Analysis of genetic diversity of Hopea cordata Vidal, a species of Dipterocarpaceae, by DNA markers


Nguyen Hoang Nghia

Forest Science Institute of Vietnam

Nguyen Thuy Hanh, Nguyen Duc Thanh

Institute of Biotechnology, VAST


Hopea cordata Vidal is a native tree species which occurs naturally only in three small areas in Cam Ranh district, Khanh Hoa province where no more than 250 mature individuals can be found. These populations are endangered by cutting for fuelwood, therefore evaluation of genetic diversity in order to suggest conservation measures is very necessary. Results from analysis by using cpDNA and RAPD markers showed that from an evolutionary viewpoint, samples collected from the three areas come from one origin because no polymorphism could be found in the cpDNA studied, although there was a small difference in the nuclear genome. Due to the strong reduction in genetic resources and the low genetic diversity, conservation of the species is very difficult. The last three populations should be carefully protected to retain as many genes as possible for survival of the species in future. Furthermore, seeds should be collected whenever possible from the three areas for sowing and planting in areas where species can be best protected.





2. Research on carbon stocks of grass and bushland: A basis for development of baseline carbon data for afforestation/reforestation projects under the Clean Development Mechanism in Vietnam


Vu Tan Phuong

Research Centre for Forest Ecology and Environment

Forest Science Institute of Viet Nam


The research was undertaken by the Research Centre for Forest Ecology and Environment (RCFEE) and the Japanese Overseas Forestry Consultants Association (JOFCA) in Cao Phong and Lac Son districts of Hoa Binh province and Ha Trung, Thanh Thanh and Ngoc Lac districts of Thanh Hoa province. It focused on determining carbon stock in the biomass of grass and shrubs on non-forested land areas with potential for AR CDM as the basis for development of baseline carbon data for AR CDM. Five grass types, Imperata cylindrica, Erianthus arundinaceus, Asarum spp, Oplismenus compositus and Lophopogon intermedius and two kinds of shrubs (shrub height below 2m and shrub height 2-3m in average) that are typical for vegetation cover on non-forested land areas in Vietnam were examined. Results show that Erianthus arundinaceus had the highest carbon stock, about 20 tons/ha, followed by shrub height of 2-3m with about 14 tons/ha. The carbon content in the biomass of shrubs with a height below 2m and Asarum spp were more or less the same, about 10 tons/ha; grass Oplismenus compositus was 6,5 tons/ha, Imperata cylindrica was 4,9 tons/ha and the lowest carbon content was found for Lophopogon intermedius, at roughly 4 tons/ha.


Application of advanced techniques to plant high-yielding tree species for firewood in the Delta area


Ng« Duy B×nh, ¢u V¨n B¶y, TrÞnh Xu©n Tó

Forest science institute of Viet Nam


Summary

The project “Application of technical progress to growing high–yield firewood timber trees in the delta area” was carried out from 2000 to 2004. The results of investigating scattered trees in 10 communes belonging to 5 provinces in the plains of the North Vietnam shows that the non-industrial plantations mainly use 11 species, of which trees for firewood that are planted in significant areas are eucalyptus, acacia and casuarina. These grow slowly and give low yield. Scattered trees in the delta area meets only about 10% to 18% of the demand for fire wood. Beneficiary mechanisms to provide benefits and policies still have a lot of deficiencies that haven’t encouraged the people actively to plant trees, the land area for scattered trees is still mostly abandoned fallow.

Some models with high yielding, fast growing tree species such as Eucalyptus U6, hybrid acacia BV10 and Casuarina 701 (China) has been established on intervillage roads, intercommune roads, channel banks, on hills, open land and in office and school grounds in Bo De and Thanh Huong communes (Ha Nam province), My Hung and Yen Tan communes (Nam Dinh province), Yen Nhan commune (Ninh Binh province). The results of building the above models show that: These plants grow quickly and give high harvest yield on a large area and the people preferthe high effectiveness of the models. Therefore, if there are sound mechanisms and policies would plus and support in providing seeding, technique–the people would actively take part in planting scattering trees in their locality.


Keywords: Fuelwood, model establishment, yield




The influence of the application rate of combined Song Gianh organic phosphorus biofertilizer with DAP inorganic fertilizer on hybrid acacia growth on Tan Lap forest land in Binh Phuoc province


Pham The Dung, Nguyen Thi Thuan, Ngo Van Ngoc

Forest science institute of Viet Nam


Summary

A study to determine the optimum application rate of organic biofertilizer combined with DAP has been undertaken in pot trials in Dong Phu district, Binh Phuoc province. The study results show that although all dressing formulas result in better growth of hybrid acacia compared with the unfertilized control, a real difference in growth hasn’t been clearly manifested yet between different rates. This should be further studied.



Keywords: Fetilizer, growth, Acacia Hybrid










Study on outdoor preservation of some bamboos and timbers used for making bearing piles, construction, raw material for furniture and artificial boards


Le Van Lam, Bui Van Ai

Forest science institute of Viet Nam


Summary

In the recent years, the demand for using timber for supporting pepper plants and for construction has been increasing. However, the general characteristic of timber of the fast growing tree species is normally low strength. Therefore, when used outdoors in hot and wet climatic conditions, if it is not preserved well, the timber will be destroyed quickly by insects and fungus.

The project initially assessed the natural strength of 17 types of plantation timber that serve as the basis for orientating preservative techniques. In order to meet the requirement for timber to make pepper plant bearing piles and for construction, the project has determined capability for absorbing wood preservative of three types of timber, Acacia auriculiformis, Hybrid acacia and Urophylla eucalyptus. Based on the results of testing the effects of some outdoor-use wood preservatives and two pepper plantation models using bearing piles that are preserved by XM5 wood preservative in Quang Binh and Binh Duong province, two technical methods for preserving outdoor-use plantation timber, and one temporary technical method for preserving raw material for furniture and wood-based panelling, were proposed.


Keywords: Priservation, bamboo, plantation wood




Assessment of the influence of coffee plantations on the environment in the central highlands


Ngo Dinh Que, Nguyen Thu Huong, Nguyen Thanh Tung, Ta Thu Hoa

Research Centre for Forest Ecology and Environment

Forest science institute of Viet Nam


Summary

This report is part of the project “Investigation and assessment of the impact of forestry in the central highlands on some environmental factors in order to propose the basis for establishing forestry environmental factors and forestry environmental standards” carried out from 10/2003 to 04/2004 by the Forest Ecology and Environment Research Centre–Forest Science Institute of Vietnam. By using the integrated synthesis research method, the project has conducted surveys on coffe in the Central Highlands, concentrated in Dac Lak province in order to determine impacts of coffee planting on the environment. From the results obtained we have proposed a standard system of environmental assessment for coffee, that is divided into 4 levels: environmental sustainability, environmental safety, improvement of plantations to ensure environmental safety, and environmentally unsafe plantations.


Keywords: Environment, soil









Survey, assessment and determination of effective production forest plantation trees in the major site forms in economic forestry areas throughout Vietnam


Pham Dinh Tam, L¹i Thanh Hai, Dang Quang Hung, Tran Duc Manh

Forest science institute of Viet Nam


Summary

Currently, the problem of selecting the most appropriate tree species or varieties to serve afforestation remains one of the urgent demands of forestry production establishments, especially tree species which have high economic value and are suited to the ecological conditions of each zone. The study results indicated that:

– The site conditions in each economic forestry area are rather complex, changing from 14 to 144 sub zones, therefore, when making plans and proposing suitable species, it is necessary to focus thorough study on the main sites in order to take advantage of the potential of land, and at the same time increasing tree yield.

– The present forestry production management system is still too complex, with many focal points, therefore, there is an overlap between business production management and State administration, and between the national level and local level, resulting in the lack of unanimity in planning, in selection of tree species and other silvicultural measures.

– Land forest area distribution: The total area of plantation in the whole country at present is about 1,5 million hectare, of which: production forest (872,275ha) accounts for 59,28%, protection forest and special-use forest (539,199ha) accounts for 40,72%.

– Distribution of plantation area by major tree species: the group of Pine, Acacia, Eucalyptus, Styrax belonging to the group of priority N01, accounting for a high proportion of forest tree plantation throughout the whole county (58,31%), and the remainder are other tree species, accounting for 41,69%.

– Generally, plantation productivity in target economic forestry areas is still low, just attaining the productivity of extensive cultivation at optimal harvest age. Only acacia species, especially hybrid acacia planted in some provinces attain intensive cultivation standards.

– Determining the effective tree species used for production forest by economic forestry area, includes 37 species, of which 12 species belong to the priority N01 group, 15 species belong to the priority N02 group, 7 species belong to the priority N03 group, 3 species belong to the priority N04 group. These results will help localities to select suitable tree species, proper planting methods that bring high economic efficiency.


Keywords: Survey, evaluation, tree species collection

Study to propose wood processing technology for plantations inr the Northern mountainous provinces


Tran Tuan Nghia, Bui Chi Kien

Forest science institute of Viet Nam


Summary

Based on synthesis and analysis of data collected from the survey of actual situation of planting and processing plantation wood in the Northern mountainous provinces and through considering the results of studies on processing plantation wood from inside and outside the country, the authors have proposed plantation wood proccessing technologies for the Northern mountainous province. Researchers and managers that attended the seminar on strategy for developing plantation wood products for the Northern mountainous province (5/2004) and the Council of Science & Technology–Ministry of Agricultural and Rural Development (11/2005) assessed that these proposals are appropriate for the topography and actual situation of the current material & technical base of this ecological zone.


Keywords: Technology, plantation, wood proccessing




Evaluation of integrated efficiency of farm forestry in Yen Bai and Phu Tho provinces


Tran Thi Thu Thuy

Forest science institute of Viet Nam


Summary

Farm forestry is a new production management model in agriculture and forestry production in Vietnam. The report systematised some basic theory on farm forestry economics, overviewed current state of farm forestry development in Yen Bai and Phu Tho provinces and analyzed and evaluated the integrated efficiency of same farm forestry models in the study areas. On the basis of the research results, some orientations and solutions to improve the effectiveness of and to encourage establishment of farm forestry in Yen Bai and Phu Tho provinces were recommended.


Keywords: Evalution, forest farm

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