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中国农学通报

中国农学通报 ›› 2008, Vol. 24 ›› Issue (12): 524-527.

所属专题： 土壤重金属污染

• 工程 机械 水利 装备 • 上一篇    下一篇

不同治理措施下的农田土壤风蚀控制机理研究

韩 磊,杨治国,贺康宁,郑国强   

  • 收稿日期:2008-10-06 修回日期:2008-10-17 出版日期:2008-12-05 发布日期:2008-12-05

Study on Mechanism of Controlling Wind Erosion in Farmland under Different Improving Measures

Han Lei, Yang Zhiguo, He Kangning, Zheng Guoqiang   

  • Received:2008-10-06 Revised:2008-10-17 Online:2008-12-05 Published:2008-12-05

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711

摘要： 通过对黄羊滩沙地风速、粗糙度、防风效能、输沙量的野外观测，分析了不同治理措施下的农田土壤风蚀控制机理，研究结果表明：小网窄带防风效能高，是风沙区农田防护林合理的配置方式；此外，不同覆盖方式和不同留茬方式的地表粗糙度与秋翻裸地均是数量级的差别。在覆盖物和留茬密度基本相同的情况下，地表粗糙度和防风蚀效果均随覆盖度和留茬高度的增加而增加；在覆盖度基本相同的情况下，地表粗糙度和防风蚀效果均随覆盖物和留茬高度的增加而增加。

关键词: 乙草胺, 乙草胺, 嗪草酮, 乙·嗪悬乳剂, 大豆田, 杂草防除

Abstract: Based on the field observation of wind speed, roughness, wind-break potency and sediment yield in Huang Yangtan sandy land, this paper analyzed the mechanism of controlling wind erosion under different measures. The results are mainly as follows: the small network of narrow-band which has a high performance in wind-break is a reasonable protection forest allocation in sandy areas farmland. In addition, the surface roughness of coverage and stubble in different ways are orders of magnitude difference to the autumn bare land. When there is the same density of coverage and stubble, the surface roughness and wind-break potency increase along with the rise of coverage and stubble height. On the other hand, the surface roughness and wind erosion resistance increase with the height of cover and stubble in the case of the same coverage.