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对乌兰布和沙漠绿洲几种典型结构和配置的农田防护林带进行风速观测表明,其防风效益与林带高度、结构、疏透度等因子有关,稀疏型林带防风效果最佳,疏透型次之,通风型防风效果最差;在林带结构相同的情况下,林带降低风速的作用随着林带高度的增加而增加;防护林可降低地表输沙量,且林后输沙量下降比例大于林前。
The wind speed observation of several shelterbelts in the typical structures and configurations of the Ulanbuh Desert Desert shows that the windbreaking benefits are related to factors such as the height of the forest belt, the structure and the degree of porosity. The sparse type shelterbelts have the best windbreak effect, The windbreak effect of ventilation type is the worst. Under the same structure of forest belt, the effect of reducing wind speed in forest belt increases with the height of forest belt; the protection forest can reduce the amount of surface sediment transport, and the proportion of forest sediment loss decreases more than that of forest .