| 不同治理措施下的农田土壤风蚀控制机理研究 |
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| 作者姓名： | 韩 磊 杨治国 贺康宁 郑国强 |
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| 作者单位： | 北京林业大学水土保持学院，赤峰市林业科学研究所 |
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| 基金项目： | 国家林业局重点推广项目"洋河沿岸沙地综合治理技术研究"
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| 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。
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| 关 键 词： | 黄羊滩 防风效能 粗糙度 土壤风蚀 |
Study on Mechanism of Controlling Wind Erosion in Farmland under Different Improving Measures |
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| Authors: | Han Lei Yang Zhiguo He Kangning Zheng Guoqiang |
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| 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. |
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| Keywords: | Huang Yangtan sandy land wind-break potency roughness length soil wind erosion |
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