Trinh Khac Muoi
Dao Cong Khanh
INTRODUCTION
Pinus merkusii is a native species of Vietnam which mainly occurs in some of the northern provinces.
In recent years, Pinus merkusii forest planting has increased rapidly to reach different economic objectives: resin, pit-prop, ecological and environmental improvement etc..
It is necessary to research the increment law of some inventory factors such as paving thinning operations, especially the first thinning of Pinus merkusii, to increase the growing stock and yield of the forest. While Pinus forests reach the age thinning in quite large area, the production problem will be solved by the thinning table. This is a crucial matter needing an early resolution.
What needs to be done is the establishment of standard tables: site table, volume table and thinning table for Pinus merkusii on the basis of the increment law of research.
Latest news
- Project: Study on integrated management of insect pests and diseases on Docynia indica in northern Vietnam
- Project: Study on integrated pest management of major leaf insect pests and stem borer beetles in Acacia hybrid, A. mangium and A. auriculiformis in Vietnam
- Project: Research and develop an integrated management program for control of cinnamon pests in some main cinnamon growing areas (Northern mountainous region and Quang Nam province)
- Project: Pilot plantation and completion of planting techniques of technologically advanced germplasm of Acacia auriculiformis (AA42, AA53, AA56, AA92, AA95) for sawlog in the southeast and south central.
- Project "Research on selection of varieties and intensive afforestation techniques of Prunus arborea (Blume) Kalkman for providing lager timber in the Northeast and Northwest regions, Vietnam"
Oldest news
- study on soil mixtures used as the medium for raising p.merkusii seedlings for large-scale production (1972 - 1975)
- preliminary research on use of some pure symbiotic fungi to make mycorrhiza with p.merkusii seedlings (1976 - 1977)
- npk mineral nutrient requirement of pinus merkusii at nursery age (1973-1976)
- effect of some micro-element on growth and tolerance of p.merkusii in nursery (1973 - 1976)
- study on prevention and control of cercospora needle blight for pines in nursery (1965-1970, 1973, 1977)
