Information on Forest Science and Technology Number 1 2000

Summaries of papers in the bulletin; for more information contact

Scientific and technological achievements in a project to establish a new 5 million hectares of forests in Vietnam

(Do Dinh Sam)

The author describes achievements that have been made in recent years in implementing a project to establish 5 million ha of forests in Vietnam. Results have been obtained in basic research on land use planning and evaluation of forest land potential; selecting a collection and determining the structure of planted tree species in a group of large timber species, eucalypts, acacias, pines, bamboo, trees and plants that produce special products, trees that grow on coastal sandy soils and in mangrove areas. The author also describes results from research on forest tree improvement, reforestation models, determination on investment rates and policy research.

Vegetative propagation of Pinus massoniana by cuttings

(Le Dinh Kha)

Treating terminal branch cuttings of P. massoniana trees of different ages with IAA and IBA at concentrations of 100, 150 and 200 ppm showed that, in comparison to control treatment, rooting ability of P. massoniana cuttings is significantly increased by using growth regulators. Cuttings in the control treatment (no growth regulator) 70-80 days after treatment were either not yet rooted or a rooting percentage of only 10-15% was observed, whereas the rooting percentage of cuttings treated with 150 ppm of IAA in 8 hours was 83% and that of cuttings treated with IBA in 6-8 hours was up to 100% for 10-year-old trees and 20% for 20-year-old trees. No rooted cuttings were observed from 50-year-old trees.

Some silvicultural problems in the in-situ gene conservation of forest tree species

(Nguyen Hoang Nghia)

In the process of in-situ gene conservation of forest tree species in the tropics there are some silvicultural problems that directly affect the objectives and results of the conservation. Adequate solutions to these problems are needed. Specifically, the problems are the limited number of individuals of the species being conserved, poor regeneration and drastic competition between the tree species in the population. Without man’s interference these factors can result in the elimination of the species that need conserving. As well as the species targeted for conservation, some species with a supporting role, supplying food for other members of the ecological system, also need proper protection.

Preliminary selection of the micro-organisms for disintegration of insoluble phosphate in production of microbial fertilizer for forestry

(Pham Quang Thu and Le Khanh Van)

The authors have studied and selected two bacterial strains and one mould strain capable of disintegrating insoluble phosphate. These strains grow and develop well in soil of low pH. The three strains all adapt and develop well at 30-32ºC in 2-4 days. The strains D1-4 and L4-1 develop well in fluid and solid media (peat) at 108 -1010 cells/ml or g and are highly promising in production of microbial fertilizer for forest tree species.

Rehabilitation of Dipterocarpaceae forest

(Tran Quang Viet)

Dipterocarpaceae forest has an important position in the natural environment of the tropics. Species of Dipterocarpaceae have a number of characteristics favourable for the planting and restoring of ecological systems that have been destroyed (fast growth, low level of attack by insects and diseases, mixed establishment and stable forests with a limited number of species). Numerous planting systems have been tried. The planting of these species mixed with supporting species is effective in improving the survival and growth of trees and this system of forest enrichment in patches is recommended for over-exploited natural forests. Planting in narrow bands is recommended for protection forest and wide bands for production forest.

Drawing a dynamics chart for tractors

(Nguyen Can)

Looking at a machine’s dynamics provides a technical standard for machinery such as tractors. The author uses a simple programme to draw dynamics charts of a tractor. This programme may be used for some types of tractor used in Vietnam.

Research on factors affecting the capacity of a woodchip producing machine (MB 930.B)

(Nguyen Manh Hoat)

A small-scale woodchip-producing machine, MB 930 B was designed by the Forest Industry Centre (FIC) of the Forest Science Institute of Vietnam. The machine is manufactured by a collaboration between FIC and the Polytechnics Company – Hanoi Polytechnics University. Two machines are in use, supplying material for Bai Bang Paper Mill. But the capacity differs greatly between the two: one reaches 3.5 tonnes/hour and the other 6 tonnes/hour. The main reason for the difference is the organization of production and different diameters. Further research is needed on type of wood, wood moisture and knife sharpness.

Results of the transfer of equipment and technology for small-scale wood and forest product processing

(Tran Tuan Nghia)

In recent years, research by the Centre of Forest Industry has improved wood and forest product processing equipment and technology. The Centre has successfully implemented many technology transfer contracts with production units: transfer of equipment and technology for kiln-drying of timber and small-scale plywood production. Timber kiln drying equipment has been improved and manufactured at the Centre’s experimental workshop with 3, 5 and 10 m3 of timber per batch. The equipment was transferred in package contracts to production units. Contracts were signed with production units for small-width board production equipment and technology transfer, with both sides cooperating in the investment.

The forest product market in Vietnam and approaches for widening the market for forest product consumption

(Vo Nguyen Huan and Nguyen Ngoc Quang)

To evaluate the forest product market in Vietnam, the market can be divided into three categories:

· Regional

· Regularity level

– regular market

– irregular market

· Supply and demand

In general, the markets for forest products in Vietnam are poor in terms of both quality and quantity and only achieving a small part of their potential. A professional approach is needed in terms of policies, management, protection techniques, economics and the environment to widen the market for forest products in Vietnam in terms of both quality and volume.

Some general features of the forest and forest land allocation policy and its implementation in Vietnam

(Hoang Lien Son)

This paper describes in general terms the process of forest land allocation to organizations, individuals and households for use and management. It examines the changing of this policy in the context of the changing of the economy from a centralized, subsidized one to a market economy. The paper evaluates the preliminary results obtained and recommends approaches to improve forest land allocation policy to make land use after allocation more sustainable.

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