The Influence of Corn Straw Mulching on the Processes of Runoff and Sediment Yield in the Sloping Farmland of Karst Area

XU Qinxue1; 2; ZHU Xiaofeng1

doi:10.13870/j.cnki.stbcxb.2017.02.005

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The Influence of Corn Straw Mulching on the Processes of Runoff and Sediment Yield in the Sloping Farmland of Karst Area

更新时间：2024-11-07

- The Influence of Corn Straw Mulching on the Processes of Runoff and Sediment Yield in the Sloping Farmland of Karst Area
- Vol. 31, Issue 2, Pages: 22-26(2017)
- 作者机构：
  
  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
  2. 中国科学院环江喀斯特生态系统观测研究站，广西环江,547100
  3. 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
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2017.02.005
  CLC： S157.4
- Published：2017
- 稿件说明：
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XU Qinxue1, 2, ZHU Xiaofeng1. The Influence of Corn Straw Mulching on the Processes of Runoff and Sediment Yield in the Sloping Farmland of Karst Area[J]. 2017, 31(2): 22-26.
DOI：

XU Qinxue1, 2, ZHU Xiaofeng1. The Influence of Corn Straw Mulching on the Processes of Runoff and Sediment Yield in the Sloping Farmland of Karst Area[J]. 2017, 31(2): 22-26. DOI： 10.13870/j.cnki.stbcxb.2017.02.005.

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（63，100 mm/h）和5个秸秆覆盖度水平（0，20%，50%，80%和100%）下进行。结果表明：在中雨强(63 mm/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（100 mm/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。

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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