Le Dinh Kha et al I. Introduction The forest cover in Vietnam was estimated at 43 per cent in 1945. Through long years of wars, exploitative timber extraction and continued conversion of forest land to food and cash crop farming, it has shrunk to only 29 per cent in 1990, which has caused the Government to shape out a nation wide plantation programme to grow five million hectares of forest plantations, of which two million are mainly for timber production and one million for … [Read more...]
Research on the selection, breeding and propagation of main forest tree species used in plantations
June 30, 2005 by
research on formulation of scientific and technological basis for supplying improved planting materials of forest trees
June 30, 2005 by
Le Dinh Kha and collaborators (1) I. INTRODUCTION Planting materials are one of the most important factors in forestry production. In recent years forest tree improvement in our country has been given attention . Some results from research on species and provenance trials as well as breeding have been, , put into practice step by step. However, forest tree breeding work , in general, still has many limitations. The subject en titled " Research on formulation of scientific and … [Read more...]
Breeding of Camellia oleosa having high yield for Lang Son area (1987 – 1990)
June 30, 2005 by
Nguyen Hoang Nghia Doan Thi Bich INTRODUCTION Camellia oleosaRehd. belonging to the family Theaceae, is one of the 10 major, oil supplying species which are involved in planting and exploitation research in the world and in Vietnam. Main product of Camellia oleosa is oil extracted from seeds, which is used as animal fat by people and can be used as raw material for some industry branches such as soap, pharmaceutical production. To increase production and yield of Camellia oleosa … [Read more...]
Propagation of Eucalyptus hybrids (E. exserta x E. tereticornis) by tissue culture
June 29, 2005 by
Nguyen Ngoc Tan I. INTRODUCTION Eucalyptus is a group of tree species which meets the requirements for fuelwood, mine-poles, furniture, construction wood, pulp, export and other minor products such as tanin and essential oil. Having originated mainly from Australia, they have been introduced into many countries in Asia, Africa and America. They are also used as a major planting species in many areas from North to South Vietnam. Eucalyptus grow rapidly in suitable sites, can easily … [Read more...]
Propagation of rattan (Calamus platyacanthus Warb.) by tissue culture
June 29, 2005 by
Nguyen Ngoc Tan 1. INTRODUCTION Calamus platyacanthusWarb. is a valuable species with many good characteristics such as being light, durable, flexible, smooth and easy to combine with other materials to produce handicraft goods. The species is used in preference by people in the country and for export. According to a preliminary survey, Calamus platyacanthus is one of 26 rattan species in Vietnam, which occurs at an elevation ranging from 100 m to 1500 m but mostly at 400 - 900 m, … [Read more...]
Role of casuarina in Vietnam
April 27, 2005 by
Phi Quang Dien 1. INTRODUCTION Casuarina was introduced into Vietnam from unknown sources in 1896 (Nguyen Huu Hien, 1977). In Vietnam, it is called FILAO' or PHILAO' by people living in the north , XI LAU' by people living in the northern central and DUONG by people living in the south and the southern central regions. The casuarina planted in Vietnam is C. equisetifolia forest (Nguyen Huu Hien, 1977). C. equisetifoliawas first planted on sand at Nghe Tinh coast. It grew well … [Read more...]
results of the research subject on genetic conservation of forest plant species up to 1993
April 27, 2005 by
Nguyen Hoang Nghia INTRODUCTION Within the network of the National Programme for genetic Conservation in 1988, the Forest Genetic and Tree Breeding Division belonging to the Forest Science Institute of Vietnam completed the project titled “ Genetic Conservation of Forest Plant Species” and this project was approved by the Ministry of Forestry, Ministry of Science, Technology and Environment, and activities of the research subject have since been carried out since then. … [Read more...]
trials of planting liquidambar formosana on soil types having rhodomyrtus, melastoma sp., cratoxylum cochinchinensis, eupatorium odoratum and shrubs at huu lung
April 27, 2005 by
Nguyen Anh Tiep INTRODUCTION In Huulung area (Langson province), there are two soil types which occupy a considerable area, they are: * Bare hill land which was rehabilitated with Rhodomyrtus tomentosa, Melastoma dodecandrum, Cratoxylum cochinchinensis and Liquidambar formosana. Soil is poor with stone pieces. * Degraded forest land due to frequent burning for agriculture cultivation. Surface layer is thin; poor and dry; vegetation contains drought-tolerant, short shrubs and … [Read more...]
some initial basis in the normative making of timber exploitation
April 27, 2005 by
Nguyen Ngoc Lung Do Dinh Sam INTRODUCTION Natural mixed forest plays an important role in the conservation of the life environment and is the main source of supply of woodfire logs and other forest product. Some years ago the disappearence and deterioration of the forest greatly affected forest products, supply and degree of protection from stormy winds. There were some technical causes, among them being mistakes in the definition of the exploited objects. The quantity … [Read more...]
