水土保持学报2017，Vol.31Issue(2)：22-26,32,6.DOI:10.13870/j.cnki.stbcxb.2017.02.005
秸秆覆盖对岩溶区坡耕地产流产沙的影响
The Influence of Corn Straw Mulching on the Processes of Runoff and Sediment Yield in the Sloping Farmland of the Karst Area
摘要
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.关键词
岩溶/秸秆覆盖/人工模拟降雨/坡耕地/径流过程Key words
Karst/straw cover/simulated rainfall/sloping farmland/runoff process分类
农业科技引用本文复制引用
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):22-26,32,6.基金项目
国家自然科学基金项目(41301289,51369009) （41301289,51369009）
国家重点研究计划项目(2016YFC0502403) （2016YFC0502403）
广西高等学校高水平创新团队及卓越学者计划项目(002401013001) （002401013001）
