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秸秆覆盖对三峡库区坡面侵蚀的影响
严坤1,2; 王玉宽1; 徐佩1; 王丰1,2; 刘勤1
Corresponding Author王玉宽
2016-01-26
Source Publication水土保持通报
ISSN1000-288X
Volume36Issue:1Pages:6-10
Abstract

[目的]分析农作物秸秆不同覆盖处理对坡面产流、产沙影响,为三峡库区坡耕地水土保持措施优化提供技术支持。[方法]利用人工模拟降雨技术,分析了5种不同雨强下不同秸秆覆盖处理的径流、泥沙过程。[结果]坡面覆盖秸秆能推迟坡面初始产流。在小雨强时,秸秆覆盖推迟初始产流显著,但随着雨强的增加,推迟初始产流的作用降低。在坡面下坡段覆盖秸秆推迟初始产流效果优于在坡面上坡段覆盖秸秆。对于产流产沙而言,在坡面上坡段覆盖秸秆与无覆盖差异不显著,但在坡面下坡段覆盖秸秆时径流模数和侵蚀模数为无覆盖的61.57%~69.1%和14.54%~18.31%,且减少地表径流和泥沙流失效果优于在坡面上坡段覆盖。秸秆覆盖后土壤流失比(SLR)介于0.022~0.611之间,且随着覆盖率的增加而降低,在坡面下坡段覆盖秸秆SLR值在上坡段的1/4。[结论]合理选择农作物秸秆在坡面覆盖的坡位及覆盖度,能有效降低坡面产流与侵蚀产沙,产生较好的水土保持效应。

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[Objective]The objective of this study is to analyze the effects of different straw mulching treatmentson slope runoff and sediment yield in order to provide technical support for soil and water conservationmeasures in sloping land.[Methods]Simulated rainfall was conducted to assess the effects of straw mulchingon slope runoff and sediment yield under different rainfall intensity.[Results]Straw mulch could delay theinitial runoff-yielding time,especially under lower rainfall intensity.As the rainfall intensity increased,thedifferences among all treatments decreased.The initial runoff-yielding time in the lower slope was longerthan that in the upper slope.The mean runoff modulus and erosion modulus in the lower slope accounts for61.57%~69.1%and 14.54%~18.31%of that in the bare land,respectively.The soil loss ratio(SLR)valueranged from 0.022to 0.611,and in lower slope it accounted for 25%of that in the upper slope.The soilloss ratio decreased with the increase of straw mulching coverage.[Conclusion]Choosing the optimal strawmulching position and coverage can effectively reduce surface runoff and sediment yield,and it is of great importancefor soil and water conservation in the Three Gorges reservoir area.

Keyword三峡库区 秸秆覆盖 土壤流失比 产流产沙过程 模拟降雨
DOI10.13961/j.cnki.stbctb.2016.01.002
Indexed ByCSCD ; 北大中文核心
Language中文
CSCD IDCSCD:5653199
Citation statistics
Cited Times:5[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/17998
Collection山区发展研究中心
Affiliation1.中国科学院、水利部成都山地灾害与环境研究所
2.中国科学院大学
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
严坤,王玉宽,徐佩,等. 秸秆覆盖对三峡库区坡面侵蚀的影响[J]. 水土保持通报,2016,36(1):6-10.
APA 严坤,王玉宽,徐佩,王丰,&刘勤.(2016).秸秆覆盖对三峡库区坡面侵蚀的影响.水土保持通报,36(1),6-10.
MLA 严坤,et al."秸秆覆盖对三峡库区坡面侵蚀的影响".水土保持通报 36.1(2016):6-10.
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