| 高寒地区不同土地利用方式对土壤抗风蚀能力的影响 |
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| 引用本文： | 赵锦梅,张德罡,刘长仲,徐长林.高寒地区不同土地利用方式对土壤抗风蚀能力的影响[J].水土保持学报,2010,24(1). |
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| 作者姓名： | 赵锦梅 张德罡 刘长仲 徐长林 |
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| 作者单位： | 1. 甘肃农业大学草业学院,兰州730070;甘肃农业大学林学院,兰州730070
2. 甘肃农业大学草业学院,兰州,730070 |
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| 基金项目： | 全球环境基金(GEF)甘肃牧业发展应用研究项目(No.052456CHA-GS-J-3) |
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| 摘 要： | 采用风洞实验对祁连山东段天祝高寒地区天然放牧草地、退耕自然恢复草地、翻耕地、免耕留茬地和人工种植多年生草地5种土地利用方式下的原状土抗风蚀能力进行了研究。结果表明,多年生草地的临界侵蚀风速最大,免耕留茬地和天然草地次之,翻耕地和退耕自然恢复地最小;风蚀速率与风速变化成正相关,随着风速增大,风蚀速率相应增加;风蚀速率和风速变化服从幂函数变化关系。在近地表0-20cm范围内,降尘量总量依次为退耕自然恢复地翻耕地天然放牧草地多年生草地免耕留茬地;土壤抗风蚀能力表现为退耕自然恢复地天然放牧草地多年生草地免耕留茬地翻耕地。
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| 关 键 词： | 高寒地区 土壤风蚀 土地利用方式 风洞试验 |
Impacts of Different Land Use Patterns on Resistance of Soil to Wind Erosion in Alpine Area |
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| ZHAO Jin-mei,ZHANG De-gang,LIU Chang-zhong,XU Chang-lin.Impacts of Different Land Use Patterns on Resistance of Soil to Wind Erosion in Alpine Area[J].Journal of Soil and Water Conservation,2010,24(1). |
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| Authors: | ZHAO Jin-mei ZHANG De-gang LIU Chang-zhong XU Chang-lin |
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| Institution: | ZHAO Jin-mei1,2,ZHANG De-gang1,LIU Chang-zhong1,XU Chang-lin1 (1.College of Grassl, Science,Gansu Agricultural University,Lanzhou 730070,2.College of Forestry,Lanzhou 730070) |
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| Abstract: | The impacts of different land use patterns on the resistance of soil to wind erosion in Tianzhu,the alpine meadow area in the eastern part of Qilian mountains,were studied through wind tunnel experiment. Five land use patterns,including free-grazing grassland,returned farmland to naturally restored grassland,ploughed farmland,no-tillage farmland with oats stubble and sowed perennial grassland,were designed. The results indicated that the threshold wind erosion velocity for sowed perennial grassland was the ... |
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| Keywords: | alpine area soil wind erosion land use pattern wind tunnel experiment |
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