| 山杨林的水土保持作用 |
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| 引用本文： | 赵鸿雁 吴钦孝. 山杨林的水土保持作用[J]. 西北林学院学报, 1993, 8(3): 39-44 |
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| 作者姓名： | 赵鸿雁 吴钦孝 |
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| 作者单位： | 中国科学院西北水土保持研究所，水利部西北水土保持研究所 陕西杨陵 712100，陕西杨陵 712100 |
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| 基金项目： | “七五”国家重点攻关项目“黄土高原水土保持林体系综合效益研究” |
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| 摘 要： | 分析了山杨林的水土保持作用。结果表明:林冠截留量与降水量为幂函数关系,截留率为15.58％;林内雨滴径级不连续,降雨动能大于空旷地;枯枝落叶阻延径流流出时间随其厚度增加而延长,随波度和径流深度增加而减小;枯枝落叶能够提高土壤的抗冲性;与荒地相比,山杨林减小径流、泥沙量各为69.8％和98.9％,采伐上层林地各减小为73.9％和99.2％。
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| 关 键 词： | 山杨林 水土保持 |
Soil and water Conservation Function of Populus davidiana Forest |
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| Zhao Hongyan Wu Qinxiao Liu Xiangdong. Soil and water Conservation Function of Populus davidiana Forest[J]. Journal of Northwest Forestry University, 1993, 8(3): 39-44 |
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| Authors: | Zhao Hongyan Wu Qinxiao Liu Xiangdong |
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| Abstract: | Describes the function of soil and water conservation of Populus davidiana forest. The amount of canopy interception correlated with precipitation as power Junction and the canopy interception rate is 15. 5%. In the forest raindrop diameter is uncontinous.and the kinetic energy of rainfall is greater than that in the bared land. The time of runoff retarded by litters increased with the thickness of litters and decreased with the increasing steepness of slopes and depth of runoff. Soil anti erodibility can be improved by litters. Compared with abandoned land, PuPolus davidiana forest can reduce the runoff and sediment by 69. 8% and 98. 9% and cutting of upper story can reduce to 73. 9% and 99. 2% respectively. |
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| Keywords: | Populus davidiana forest soil and water conservation interception runoff |
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