Vietnam Journal of Forest Science Number 1- 2006

January 14, 2007 by

1.Effects of some factors on regulations concerning community forest management in Vietnam

Nguyen Ngoc Quang, Hoang Lien Son

Forest Science Institute of Vietnam

Summary

For a long time forests have provided a means of support for ethnic communities. People often set up regulations on management of forest resources to include co-management and co-beneficiaries. Such regulations have been evaluated as being most effective and stable for natural resource management. However, changes in policies, the economy and society have had a negative impact on regulations for community forest management, which in some cases have been abolished. Over the past 10–20 years, the recommended model for community forest management has become a subject for discussion by many scholars around the world.

From the consideration of endogenous and surrounding influences on regulations on community forest management, the authors concluded that the existing regulations are not the best compared to other regulations, however, these regulations need to be considered by the Government as forest and the community are closely connected together.

Keywords: Regulations, community, community forest management regulations

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2.Preservative absorption by ordinary wood preservative soakage of some plantation wood

Nguyen Van Duc, Truong Quang Chinh, Vu Van Thu

Forest Science Institute of Vietnam

Summary

Simple soaking in preservative is an easy and effective method of wood preservation. From the results of research on preservative absorption in wood of six plantation species the authors developed correlation equations that can be applied in practice to determine the soakage regime for each batch of timber depending on the end use and required quality of the product.The soakage regime for wood of high moisture content is suitable for wood used outdoors such as posts and poles.If the wood moisture content has been reduced during transport and storage the soakage regime is the same as that used for sawn timber.

Keywords: Wood preservative, preservative absorption, plantation wood

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3.Results of research into the natural strength of some plantation wood in Vietnam

Nguyen Thi Bich Ngoc, Truong Quang Chinh, Phan Luong Ngoc

Forest Science Institute of Vietnam

Summary

Forests planted in Vietnam have been strongly developed with high growth rate indigenous trees and imported trees. Materials made from plantation wood are gradually replacing those from natural forests in wood conversion industries. To help increase utilization of plantation wood, a study to evaluate the natural strength of 17 types of plantation wood, mainly against insects and fungus under laboratory and natural conditions was carried out. Also, 17 types of plantation wood were classified into three groups; good, average and poor natural strength. The results provide an important basis for future research aimed at increasing the utilization of plantation wood.

Keywords: Natural strength, plantation wood

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4.Effect of top dressing mineral fertilizer on Acacia hybrid growth strains

Pham The Dzung, Ngo Van Ngoc, Nguyen Van Binh

Forest Science Institute of Vietnam

Summary

An experiment on top dressing with mineral fertilizer was carried out over three consecutive years after forest planting in Tan Lap, Binh Phuoc province with four families of acacia hybrid (TB03, TB05, TB06, and TB12). Under good conditions, there is little obvious effect of top dressing on tree growth. Therefore, these conditions should be considered before using mineral fertilizer. Reports from experiments show that TB05 and TB12 have higher growth ratios, bigger tree-trunks and stumps than the other two families.

Keywords: Top dressing, growth, Acacia hybrid

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5.An action plan for protection and development of Vietnam’s mangroves to 2015

Do Dinh Sam, Phan Nguyen Hong, Vu Tan Phuong, Ngo Dinh Que

Forest Science Institute of Vietnam

Summary

An action plan for protection and development of Vietnam’s mangroves to 2015 is one of the outputs of a project on ‘Reversing environmental degradation trends in the South China Sea and Gulf of Thailand’. The overall objective of the action plan is to reinforce protection, restoration and sustainable use of mangrove ecosystems by ensuring protective functions, biodiversity and socio-economic development. The action plan contains three specific objectives, nine actions and eight proposed projects to deal with degradation of mangroves and constraints as well as challenges in mangrove management in Vietnam.

Keywords: Mangrove forest, action plan, environment protection

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6.Some ecological characteristics of Parashorea chinensis H.Wang in Thuong Tien nature reserve, Kim Boi district, Hoa Binh province

Doan Dinh Tam

Forest Science Institute of Vietnam

Summary

Parashorea chinensis H. Wang is a large timber species, which has high economic and biological value. Parashorea chinensis is recorded in the Vietnam Red Book (a description of Vietnam’s biodiversity and list of endangered species). It is in high danger of extinction. Parashorea chinensis has a narrow ecological amplitude and grows mainly on yellow or red-yellow feralitic soils. It can be found in almost pure stands where it appears to be able to suppress associated vegetation. It has been heavily exploited and is now only rarely found in natural forests. It usually grows with other tree species such as Daracotomelum duperreanum pierre, Cinamomum parthenoxylum, Machilus bonii, Syzygium malayanum (Gagnep) Merr. It only grows on a limited range of soils and is affected by calcium carbonate. It does not grow on denuded hills, wasteland or in degraded soil.

Keywords: Parashorea chinensis H. Wang, ecological character

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7.The results of research on the application of Rhizobium technology for Acacia hybrid and A.mangium in nurseries and plantations

Le Quoc Huy, Nguyen Minh Chau

Forest Science Institute of Vietnam

Acacia hybrid (A. mangium x A. auriculiformis) and A. mangium are important for many afforestation projects in Vietnam, both economically and environmentally. The research on Rhizobium technology development reported in this paper was set up as part of the ‘Five Million Hectare Reforestation Program’. A useful Rhizobium technology has been successfully researched and developed for the two species, including in-vitro isolation and screening, glass-house and nursery screening, multiplication and inoculum production, storage and maintenance, and inoculation and inoculum application at nursery and plantation stages. Six strains of Rhizobia for hybrid Acacia and A. mangium have been selected and the inoculant developed for application in nursery and plantation trials. The growth response of hybrid Acacia in the nursery to the Rhizobium application was as high as about 100% more than the untreated control (height, diameter, dried weight), 30% more after one year and 20% (height, diameter) after two years of planting in plantation trials.

Key words: Hybrid Acacia, A. mangium, rhizobium, strain, inoculant application

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Research on the development of criteria and indicators for afforestation in A/R–CDM projects in Vietnam

Ngo Dinh Que, Nguyen Duc Minh and collaborators

Forest Science Institute of Vietnam

Summary

Using available methods for measuring growth rate, productivity and biomass assessment of plantations at different sites and locations, the project has developed a method to calculate carbon content of both above- and below-ground parts of plants, leaf litter and soil. The project has also developed a regression equation correlation between stock volume and contents of CO2 sequestration for timber species such as P. merkusii, E. urophylla, A. mangium, A. auriculiformis and Acacia hybrids. The baseline concept has already been developed and applied for a Clean Development Mechanism (CDM) project in Hong Trung, A Luoi district, Thua Thien Hue province. As a result of project implementation, 7 principles, 17 criteria and 51 indicators have been developed and proposed for the application of A/R-CDM projects in Vietnam.

Keywords: Clean Development Mechanism, criteria, plantation plans

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Selection of Eucalyptus clones for disease resistant and high productivity

Nguyen Hoang Nghia, Pham Quang Thu, Nguyen Van Chien

Forest Science Institute of Vietnam

Summary

As a result of studying, 73 eucalyptus families of E. camaldulensis have been selected with disease levels from 1 to 4 and high growth rate from 150 families of Eucalyptus families FORTIP; from productive planted forest, 78 plus trees of E. camaldulensis with high disease resistance and rapid growth rate were selected. In the experiment, 136 Eucalyptus strains were planted in areas where serious diseases are present to select resistant clones. Promising strains were EF18, EF43, EF29, EF55, E7 and EF23, which all had a rapid growth rate (average 20m3/ha/year) and showed good resistance to leaf disease in Song May (Dong Nai province) at 4 years of age. Some clones which show potential for rapid growth and disease resistance selected from productive forest are EC57 (15m3/ha/year), EC15, EC26, EC38, and EC63 in Song May; clones of EC25 (10m3/ha/year), EC15, ET1, EC69 and EC66 in Binh Dien (Thua Thien Hue province); clones of EC84, ET1, EC67, EC76, and ET2 in Dai Lai (Vinh Phuc province) and clones of EC81 (29.3m3/ha/year), EC10 (21.9m3/ha/year), and EC82 (20.3m3/ha/year) which were experimented on after they reached 2 years of age in Minh Duc (Binh Phuoc province).

Keywords: Disease resistance breeding, clone, eucalyptus

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