Le Dinh Kha Pham Van Tuan Ha Minh Tam INTRODUCTION Manglietia glauca is a fast growing broad leaved species and one of the main planting species for the central area of Northern Vietnam and North East Vietnam. However, due to unselected seeds the quality of plantations is not good, so study in selection of mother trees and establishment of seed stands and seed orchards aiming at improving and increasing quality of plantations for the next generation is an urgent requirement. … [Read more...]

Hoang Vinh Tuong INTRODUCTION There is a requirement for a large quantity of planting stock in order to plant Dendrocalamus in large-scale in Thanh Hoa province according to the Government’s policy.Common planting stock such as rhizomes and stem base are not enough, so that other parts of the aerial stem such as stem cuttings and branch cuttings must be used. As in other bamboo species, these types of planting stock give new shoots, branches and leaves before developing … [Read more...]

Nguyen Van Diep INTRODUCTION Thinning of Manglietia glauca plantations is urgent at present because many production organizations have large areas of Manglietia glauca plantation, but no thinning technique, so that plantations have the original density as at planting. Trees are in lacking space, natural pruning is strong, crowns are small and plantations show a tendency towards a decreasing increment which can result in low productivity, bad quality and prolonged rotation. Our … [Read more...]

Vu Dinh Phuong Vien Ngoc Hung INTRODUCTION To serve management work of Manglietia glauca monoculture plantation forest, investigation was done as follows, 1. Find method to determine volume table, at the same time apply that method to determine volume table (under bark and with bark) for Manglietia glauca, in order to determine production (yield) of the forest. 2. Find method to determine table for soil classes, at the same time use that method to determine temporary table … [Read more...]

Pham Quang Minh INTRODUCTION E.exsertais a tree species introduced for planting on bare hill land. In the last few years, E.exserta plantations were developed quite rapidly with success in some areas and with failure in other areas where economic effect was low as was plantation productivity. The problem is that study on some technical measures for intensive cultivation of Eucalyptus plantation must be carried out to increase the productivity of the plantation. Measures to … [Read more...]

Hoang Xuan Ty Nguyen Duc Minh Le Xuan Thao INTRODUCTION Eucalyptus is a tree genus which originated mainly from Australia and contains some hundred species. Due to its fast growth, wide adaptability and the wood having a high value for industry, many countries in the world have introduced and planted it successfully over several million hectares. During the period 1960-1972 in northern Vietnam, many thousands of hectares of Eucalyptus plantation were established on bare … [Read more...]

Tran Ngoc Dang Nguyen Van Cat INTRODUCTION Eucalyptus is one of the main planting species in Vietnam. Many research areas such as soil, planting techniques, sowing etc. have been started and research on pests of eucalypts is also an imperative research field. For eucalypts, the main pests are termites which cause damage or destroy trees at two stages: newly planted stage and 1-2 year old trees (the main stage ). Termites can cause severe damage in eucalypts in Australia, … [Read more...]

Nguyen Sy Giao Nguyen Thi Nham INTRODUCTION The so-called “weak-yellow disease” is a very serious disease for P.merkusii seedlings in the nursery. This disease could cause the death of from some ten-thousands to one million seedlings in a production organization wich was main reason why many areas could not fulfill their yearly planting plan for P.merkusii. During the period 1971 to 1976, the Forest Research Institute carried out research work on this disease. … [Read more...]

Phi Quang Dien INTRODUCTION Pines have been one of the main planting species in Vietnam for many years. Pines can protect soil from erosion, improve the environment, supply wood for construction and furniture and pulp for paper. Selecting species and provenances with fast growth and adaptation to planting sites in regions to produce highly productive plantations is one of the important tasks of forest seed work. Before 1975 in southern Vietnam, some exotic pines such as Pinus … [Read more...]

Vien Ngoc Hung INTRODUCTION Pinus kesiya, an endemic tree species in the Western Highland, exists naturally in pure or mixed stands with Pinus merkusii or broad-leaved tree species. Most are distributed in Lamdong and occupy an area of 105,472 ha. The “ Taynguyen II” program touched upon a comprehensive study on Pinus kesiya in order to get a scientific basis for their cultivation. Study on increment law of Pinus kesiya and its application in production is part of the … [Read more...]