京郊延庆康庄地区不同土地利用类型对土壤风蚀的影响
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S157.1 F301.24

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国家科技攻关计划


Effect of Different Land Use Patterns on Surface Soil Erosion in Beijing Outskirts
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    摘要:

    在2005~2006年冬春大风季节,对北京市郊区延庆康庄地区不同土地利用类型(疏林地.乔灌草.林草.翻耕地,免耕地,菜地,果菜间作)进行了风速、粗糙度、风蚀量的实地观测。得出的初步结论为:不同防护林模式中乔灌草模式与疏林地和林草两种模式相比,地表粗糙度最大,削弱近地面风速和降低土壤风蚀量的效果也最为明显;农田中果菜间作地表粗糙度最大,免耕地次之,翻耕地最小;在削弱近地面风速方面,果菜间作效果最为明显.菜地次之,翻耕地最差;在降低土壤风蚀量方面,免耕地降低幅度最大,果菜间作次之,翻耕地最差;在不同防护林模式中.乔灌草防风蚀效果最好.在农田中,免耕与果菜间作防风蚀效果较好。

    Abstract:

    A series of field observations of sand blowing on different utilizing land patterns in Beijing outskirts was finished during the winter of 2005 and the spring of 2006.The result showed:(1) In three patterns of shelterbelt,the roughness length of arbor-shrub-grass compound land was the most than the roughness length of the others(sparse woodland and woodland-grass compound land),the effect of weaken wind speed and reduced soil erosion was the significant.(2) In farmland,the roughness length of fruit-cabbage intercrop land was the most than that of the other farmland patterns,and the effect of weaken wind speed was the best.(3) The effect of no-tillage land reduced soil erosion was the significant.(4) In three patterns of shelterbelt,the effect of arbor-shrub-grass compound land was the best,and no-tillage and fruit-cabbage intercrop land were better in farmland on the surface soil erosion.

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李晓娜,武菊英,徐彪,王淑琴.京郊延庆康庄地区不同土地利用类型对土壤风蚀的影响[J].水土保持学报,2006,(6):22~24,156

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  • 收稿日期:2006-02-01
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