Dr. Pham Van Mach (1) Prof. Pham Van Ty (2) Bsc. Nguyen Thi Thu (2)       I. INTRODUCTION     Pinus merkusiiis rather widely planted in some provinces in the North and Centre of our country and is one of the main forest plantation species. However one of the difficulties encountered in the course of planting Pinus merkusii is its frequent susceptibility to damping - off disease in the nursery stage. The proportion of infected … [Read more...]

Dr. Ngo Que INTRODUCTION For nearly 30 years we have carried out the planting of P. merkusii on a large scale, on tens of thousands of hectares, but the ratio of established plantations remains small. Plantation quality is uneven and unstable. The choice and use of land for P. merkusii forest planting and management have remained a great problem with a regard to concrete policy and the approach of the forestry branch in the past years. Problems arise namely: what is the cause of many … [Read more...]

Nguyen Ngoc Binh   INTRODUCTION   Scientific analysis and evaluation of existing experience in agroforestry production in the country, and identification of a number of important agroforestry models that are widely applicable in each production area.   Identification of the remaining technical problems, orientation of the research work aimed at perfecting the trials in production and working out new agroforestry models suitable for each region.   1. … [Read more...]

Le Quang Lien   I. INTRODUCTION Dendrocalamus membranaceusis a species of the Bambusaceae family, which grows in clumps with a high growth rate. During one night, bamboo shoots can reach up to 0.6 - 0.7m and after 45 days, bamboo trees can attain a height of 18-20m with a breast height diameter of 10-12 cm and a fresh weight of 35-40kgs. After two years, they can be harvested for the paper industry, to supply electric poles, gutters, house pillars and other products. This native … [Read more...]

Nguyen Hoang Nghia INTRODUCTION Vietnam is a tropical country located in South - East Asia with a total area of about 330,000 km2 ranging from latitude 9o N to latitude 23o N, of which 20 million ha are forest and forest land (about 60% of the country's area). The country has very abundant and diverse flora containing about 12,000 plant species of which over 7.000 species belonging to 1,850 genera and 267 families have been identified. This flora contains many types of forest … [Read more...]

Hoang Xuan Ty 1. The role of casuarina on coastal sandy soil Vietnam has a 3,200 km long coastline, with a total of about 600,000 ha coastal sandy soil. One part of that sandy soil has been used for agriculture. The remainder of about 462,000 ha is not favourable for industrial plants (Phan Lieu, 1987). On these kinds of sandy soil, Casuarina equisetifolia is the most superior wooden species and is widely planted with the following objectives: · Sand stabilization forest, forest … [Read more...]

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...]

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...]

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...]

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...]