| A QUANTITATIVE STUDY ON“THREATEN LAND EFFECT”OF SHELTERBELT |
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| 作者姓名： | Bao Qing Institute of Forest Management in Heilongjiang Province Ren Qingshan Northeast Forestry University |
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| 摘 要： | The paper studied and analyzed the threaten land errect of shelterbelt using a quanti-tative method.A series of effect indices and their calculative methods were put forward.These indi-ces included threaten land height,threaten land angle,useful distance of threaten land or implanting(unsowing)distance,and rate of threaten land,etc.
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A QUANTITATIVE STUDY ON "THREATEN LAND EFFECT" OF SHELTERBELT |
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| Bao Qing,Institute of Forest Management in Heilongjiang Province,Ren Qingshan,Northeast Forestry University.A QUANTITATIVE STUDY ON "THREATEN LAND EFFECT" OF SHELTERBELT[J].Journal of Forestry Research,1992(1). |
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| Authors: | Bao Qing Institute of Forest Management in Heilongjiang Province Ren Qingshan Northeast Forestry University |
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| Institution: | Bao Qing
Institute of Forest Management in Heilongjiang Province
Ren Qingshan
Northeast Forestry University |
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| Abstract: | The paper studied and analyzed the threaten land effect of shelterbelt using a quanti-
tative method. A series of effect indices and their calculative methods were put forward. These indices included threaten land height,threaten land angle, useful distance of threaten land or implanting (unsowing) distance, and rate of threaten land , etc. |
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| Keywords: | threaten land indices Quantitative calculation |
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