不同砾石覆盖保持土壤水分有效性研究  

Effectiveness of Soil Moisture Keeping Under Different Gravel Cover Conditions

作　　者：秦百顺[1] 李斌斌[1,2] 

机构地区：[1]西安理工大学西北水资源与环境生态教育部重点实验室,陕西西安710048 [2]北京水保生态工程咨询有限公司,北京100055

出　　处：《中国水土保持》2012年第6期46-47,56,共3页Soil and Water Conservation in China

基　　金：国家自然科学基金项目(40971161);国家科技支撑项目(2006BAD09B02)

摘　　要：土壤水分状况是制约金沙江干热河谷地区植被恢复和造林的主要因素,改善土壤水分状况是实现该地区生态恢复重建和农业持续发展的必然途径。为给干热河谷的造林以及作物种植提供切实可行的方法,进行了不同砾石覆盖保持土壤水分有效性的试验研究,结果表明:在起始条件相同的情况下,同一小区不同深度的土壤含水量是不同的,含水量随着土层深度的增加而增大;不同砾石覆盖厚度条件下,土壤含水量与砾石覆盖厚度成正相关关系;在相同覆盖厚度情况下,砾石粒径越小,覆盖抑制土壤蒸发效果越好,土层含水量也就越高。The conditions of soil moisture are main factors to constrain the restoration of vegetation and afforestation in the dry-hot valley of Jinsha River and improving soil moisture is an inevitable approach for ecological restoration and sustainable development of agriculture in this region.In order to provide practical methods for afforestation and crop cultivation in the dry-hot valley,it conducted experimental study on effectiveness of soil moisture keeping under different gravel cover conditions.The outcomes show that: a) under the same initial conditions,the moisture content is different at the different depth of the same plot and the moisture content increase with the increase of soil depth;b) the moisture content and the thickness of gravel cover are in positive correlation under the different thickness of gravel cover conditions;c) under the conditions of same thickness of coverage,the smaller particle size of gravels,the better effect to control the soil evaporation and the higher moisture content will be.

关 键 词：干热河谷 生态修复 土壤水分 砾石覆盖 

分 类 号：S152.7[农业科学—土壤学]