| 秸秆覆盖对岩溶区坡耕地产流产沙的影响 |
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| 引用本文： | 徐勤学,朱晓锋,方荣杰,江斌伟,陈洪松,付智勇,王克林.秸秆覆盖对岩溶区坡耕地产流产沙的影响[J].水土保持学报,2017,31(2):22-26. |
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| 作者姓名： | 徐勤学 朱晓锋 方荣杰 江斌伟 陈洪松 付智勇 王克林 |
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| 作者单位： | 1. 桂林理工大学岩溶地区水污染控制与用水安全保障协同创新中心,广西桂林541004;中国科学院环江喀斯特生态系统观测研究站,广西环江547100;2. 桂林理工大学岩溶地区水污染控制与用水安全保障协同创新中心,广西桂林,541004;3. 桂林理工大学岩溶地区水污染控制与用水安全保障协同创新中心,广西桂林541004;桂林理工大学广西环境污染控制理论与技术重点实验室,广西桂林541004;4. 中国科学院环江喀斯特生态系统观测研究站,广西环江,547100 |
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| 基金项目： | 国家自然科学基金项目(41301289;51369009)，国家重点研究计划项目(2016YFC0502403)，广西高等学校高水平创新团队及卓越学者计划项目(002401013001) |
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| 摘 要： | 通过室内模拟降雨试验,研究秸秆覆盖对西南岩溶区坡耕地产流产沙的影响。试验处理按照2个雨强(63,100mm/h)和5个秸秆覆盖度水平(0,20%,50%,80%和100%)进行。结果表明:在中雨强(63mm/h)条件下,秸秆覆盖减少了地表径流的径流系数和径流强度,增加了壤中流径流系数和径流强度,在较大秸秆覆盖度下(50%,80%和100%),秸秆覆盖能有效减少土壤流失量;但在大雨强(100mm/h)条件下,秸秆覆盖导致地表径流增加并同时显著减少了壤中流,地表径流的增加同时导致土壤流失量的增加。
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| 关 键 词： | 岩溶 秸秆覆盖 人工模拟降雨 坡耕地 径流过程 |
The Influence of Corn Straw Mulching on the Processes of Runoff and Sediment Yield in the Sloping Farmland of Karst Area |
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| XU Qinxue,ZHU Xiaofeng,FANG Rongjie,JIANG Binwei,CHEN Hongsong,FU Zhiyong,WANG Kelin.The Influence of Corn Straw Mulching on the Processes of Runoff and Sediment Yield in the Sloping Farmland of Karst Area[J].Journal of Soil and Water Conservation,2017,31(2):22-26. |
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| Authors: | XU Qinxue ZHU Xiaofeng FANG Rongjie JIANG Binwei CHEN Hongsong FU Zhiyong WANG Kelin |
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| Institution: | 1.Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area Guilin University of Technology, Guilin, Guangxi 541004;2.Huangjiang Observation and Research Station for Karst Ecosystems, Huanjiang, Guangxi 547100;3.Guangxi Key Laboratory of Environmental Pollution Control Theory and Guilin University of Technology, Guilin, Guangxi 541004 |
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| Abstract: | This paper studied the influence of corn straw cover on the processes of runoff and sediment yield in the sloping farmland of a Karst area by indoor simulated rainfall experiments.The treatments were divided into two rain intensities (63 mm/h and 100 mm/h),and five levels of straw cover (0,20％,50％,80％ and 100％).The results showed that under the moderate rainfall intensity (63 mm/h),corn straw mulching reduced surface runoff coefficient and surface runoff rate,but increased subsurface runoff coefficient and surface runoff rate.When the straw mulching percentage was greater than 50％,straw cover reduced the amount of soil loss.Under high rainfall intensity (100 mm/h),subsurface runoff was the main component of total runoff on the bare slope;when the bare slope was covered with corn straw,subsurface runoff coefficient and runoff rate were decreased,and the amount of soil loss increased with the increase of surface runoff amount and rate. |
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| Keywords: | Karst straw cover simulated rainfall sloping farmland runoff process |
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