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为定量评价植被盖度、残茬高度对保护性耕作农田的防风蚀效果,以空气动力学粗糙度和抗风蚀效率为评价指标,利用移动式风蚀风洞对内蒙古武川县保护性耕作农田和对照秋翻地进行了原位测试。结果表明,随植被盖度和残茬高度的增加,空气动力学粗糙度和抗风蚀效率均增加,抑制风蚀效果加强;在30cm残茬高度、50%植被盖度下保护性耕作农田的平均抗风蚀效率可达80.55%,具备了很好的防风蚀效果。因此,要有效防治农田土壤风蚀,保护性耕作农田应具有50%以上的植被盖度和30cm以上的留茬高度。
In order to quantitatively evaluate the effect of vegetation coverage and stubble height on the conservation of tillage farmland, aerodynamic roughness and wind erosion resistance were used as evaluation indexes to evaluate the effects of conservation wind farm on the conservation tillage farmland in Wuchuan County, Inner Mongolia Autumn in situ conducted a test. The results showed that with the increase of vegetation cover and stubble height, the aerodynamic roughness and wind erosion resistance increased, and the wind erosion suppression effect was strengthened. The average anti-wind erosion of conservation tillage farmland at 30 cm stubble height and 50% vegetation coverage Wind erosion efficiency up to 80.55%, with a good wind erosion effect. Therefore, in order to effectively control wind erosion of farmland, the conservation tillage farmland should have a vegetation cover of more than 50% and a stubble height of more than 30cm.