土壤2017，Vol.49Issue(3)：601-607,7.DOI:10.13758/j.cnki.tr.2017.03.025
秸秆覆盖对崩积体坡面产流产沙影响的模拟试验
Simulation of Straw Mulch on Colluvial Soil Erosion and Yield of Runoff and Sediment
摘要
Abstract
Through simulation of rainfall in laboratory, the impacts of different straw coverages (0, 25%, 50%, 75%, 100%) and different slope gradients(25°, 30°, 35°) on the slope erosion of colluvial deposits were disclosed under the condition of 60 mm/h rainfall rate. The main results showed that: 1) The initial time of runoff under different conditions changed from 49 s to 913 s. The initial time of runoff would be putted off with the increase of straw coverage under the same slope gradient. The initial time of runoff was longest at 35° but shortest at 30°. The initial time of runoff was positively correlated with straw coverage. 2) At the beginning of raining, the runoff ratios increased rapidly in a short time, then slowed down gradually. The range of runoff increased with the increasing slope. 3)The runoff ratio was higher at 30° than at 25° and 35° under the same straw coverage. The critical straw coverage of sediment yield was 50%.关键词
人工降雨/秸秆覆盖/崩积体/产流/产沙Key words
Simulated rainfall/Straw mulch/Colluvial soil/Runoff/Sediment分类
农业科技引用本文复制引用
朱高立,王雪琪,李发志,黄炎和,邹伟,林金石,蒋芳市..秸秆覆盖对崩积体坡面产流产沙影响的模拟试验[J].土壤,2017,49(3):601-607,7.基金项目
国家自然科学基金项目(41571272,41001169)和国家科技支撑计划项目(2014BAD15B0303)资助. （41571272,41001169）
