Bui Nganh
Vu Van Me
INTRODUCTION
Due to the characteristics of the species and structure of Styrax tonkinensis plantation forest, there are some problems as follows,
1. Can erosion of soils under Styrax tonkinensis forest reduce the soil fertility, so that long-term management of Styrax forest can not be applied?
2. If in fact there is erosion at a severe level, can we take measures to control it in order to ensure adequate production of Styrax tonkinensis forest to meet the requirement for supplying raw material for the paper industry?
In order to answer suitably these questions, investigations must be done over some rotations. Our investigation was done in the first 3 years (1974 – 1976) of first -rotation Styrax tonkinensis plantation at Cauhai (Vinhphu) and Tuquan (Hatuyen) in the central area of raw material supplying for the paper industry.
METHODS
Using direct measurement, build a pool of 200m2 at the end of a primary water flow and with indirect measurement, use Molostkov’s liner to measure erosion.
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Oldest news
- study on methods of regeneration and stable, continuos management of styrax tonkinensis forest on harvested areas(1971 - 1974 )
- study on planting techniques of styrax tonkinensis to supply raw material for paper industry intuquan district, tuyenquang province (1973 - 1976)
- study on growth rules of styrax tonkinensis stand for management of styrax forest to supply raw material for paper industry(1970 - 1973)
- study on planting soil of styrax tonkinensis to supply raw material for paper (1973-1977)
- study on techniques for collecting and storing styrax tonkinensis seeds and establishment of seed stands ( 1973 - 1977)
