Simulation on Variations of Soil Moisture Under Different Mulching Techniques in Karst Areas

Shao Xiao-gui; Yang Rui

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Simulation on Variations of Soil Moisture Under Different Mulching Techniques in Karst Areas

- Simulation on Variations of Soil Moisture Under Different Mulching Techniques in Karst Areas
- Bulletin of Soiland Water Conservation Vol. 30, Issue 5, Pages: 250-253(2011)
- 作者机构：
  
  贵州大学林学院
- 作者简介：
- 基金信息：
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- Published：2011
- 稿件说明：
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Shao Xiao-gui, Yang Rui. Simulation on Variations of Soil Moisture Under Different Mulching Techniques in Karst Areas[J]. Bulletin of Soiland Water Conservation, 2011, 30(5): 250-253.
DOI：

Shao Xiao-gui, Yang Rui. Simulation on Variations of Soil Moisture Under Different Mulching Techniques in Karst Areas[J]. Bulletin of Soiland Water Conservation, 2011, 30(5): 250-253. DOI：

摘要

为探讨不同覆盖方式对喀斯特地区土壤水分变化的影响

于2009年3—5月对贵州省花江喀斯特典型峡谷区土壤水分进行了动态变化的模拟试验研究。结果表明:(1)在控制试验条件下

土壤水分的耗散与覆盖方式和覆盖程度有密切关系

土壤水分随时间变化的大小顺序依次是:无覆盖地>薄膜半覆盖地>碎石全覆盖地>枯枝落叶全覆盖地>薄膜全覆盖地;(2)土壤体积含水量与时间存在着较高的相关性

三次方程最适宜反映土壤体积含水量与时间的关系;(3)对不同覆盖下的土壤物理性质测定得出

不同覆盖下的土壤的坚实度、孔隙度、容重、渗透性有明显的差异

尽管薄膜覆盖保水效果最好

但其渗透性能和孔隙度都很差

碎石覆盖下的土壤坚实度和渗透速率最大。

Abstract

To explore the dynamic process of soil moisture under different mulching techniques in karst areas

an experimental research of soil moisture dynamic changes was carried out in Huajiang typical karst valley area of Guizhou Province from March to May

2009.The results show that under the controlled condition

the evaporation of soil moisture closely related with the way and area ratio of covering.The magnitude of changes in soil moisture over time was bare land>thin-film semi-covered land>gravel throughout land>litter throughout land>thin-film throughout land.The relationship between soil moisture contents and time was best fitted by third degree polynomial equations.Soil firmness

soil porosity

soil bulk

density

and soil permeability differed significantly under different coverings.Although the water-holding capacity of the soil under thin-film throughout treatment was the highest

its permeability and porosity was fairly low.The soil under the gravel throughout has the highest infiltration rate and firmness

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Related Institution

College of Agriculture,Guizhou University

Research Center of Karst Resources,Environment and Development of Guizhou,Guizhou Academy of Sciences

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