Research on possible use of a number of Streptomyces strains for the control of Damping – off disease of Pinus merkusii caused by Fusarium oxysporum

  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...]

Characteristics of soil for Pinus merkusii forest plantation and effect of the latter on forest soil fertility (1980 – 1984)

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...]

Review of existing experience and research on new models of agroforestry for each region (1981 – 1985)

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...]

Propagation of dendrocalamus by air -layering

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...]

Strategy for genetic conservation of forest plant species in Vietnam

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...]

Conservation of genetic diversity and forest tree improvement

Le Dinh Kha SIGNIFICANCE OF GENETIC DIVERSITY CONSERVATION IN FORESTRY Vietnam has tropical forest with abundant and diverse tree species. In particular Pteridophyta, Gymnospermae and Angiospermae have approximately 11,000 species belonging to 2,500 genera, of which about 1,900 species are in use (Tran Dinh Ly et al, 1993). However, due to the destruction of natural forests for fuel wood and other special products, the replacing of forest trees by agricultural crops, overburning of forest … [Read more...]

Relationship between the properties of coastal sandy soil and planting potential of Casuarina equisetifolia in Vietnam

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...]

Cutting propagation of a cacia auriculiformis and A. mangium

Le Dinh Kha Acacia auriculiformisand A. mangium are two of the main planting species in Vietnam. For the next 10 years the planting area of these two species will probably be about 130.000 ha. To date there have been thousands of ha of Acacia plantations established throughout the country, with seeds imported from Australia or collected from A. auriculiformis and A. mangium plantations of unknown provenance, which were established in southern Vietnam in the 1960s. Recent results of trials … [Read more...]

Sấu – Dracontomelum duperreanum Pierre, D. sinense Stapf

Tên loài: Sấu (Dracontomelum duperreanum Pierre, D. sinense Stapf) Họ: Anacardiaceae Ảnh 1: Sấu cổ thụ trong vườn Quốc Gia Xuân Sơn Ảnh 2: Cây Sấu để trồng rừng Ảnh 3: Cây Sấu để trồng đường phố … [Read more...]

Setting up a Monitoring & Evaluation System for the Project for Rehabilitation of Natural Forestin DegradedWatershed Areas in the North of Vietnam

During the first phase of the mission, the consultants were to familiarize with the project’s strategy, organization structure, activities and, more specifically, survey current field activities such as demonstration, silvilcultural experiment, on -farm trials and nursery. In addition, the consultants visited following selected forestry-related projects to assess their M&E system and learn experiences: · Five Million Reforestation Project (Standing Office for Central Steering … [Read more...]