水土保持研究2017，Vol.24Issue(6)：222-226,5.
东北典型黑土区坡耕地涝渍地土壤持水性和导水性研究
Properties of Soil Water Retention and Hydraulic Conductivity in the Waterlogged Land over Slope Cropland in Typical Black Soil Region of Northeast China
摘要
Abstract
The typical black soil zone in northeast China is an important commodity grain production base in China and plays crucial roles in the national food security and economic stability.As a special form of soil degradation,waterlogged lands severely affect the agricultural production in reclamation regions.The objective of this study was to analyze the soil water retention characteristics and hydraulic conductivity of waterlogged land and try to find the cause of waterlogged land.The sampling points were set in and around the waterlogged land over the slope cropland in typical black soil region of northeast China.The soil texture distribution along the soil profiles and soil water retention characteristics were measured.The results showed that the fine soil texture accounted for 90 ％ in the soil profile in waterlogged land.It resulted in a very adhesive soil texture.The waterlogged soil had higher air intake value and the larger water suction than the nonwaterlogged soil.Therefore,the water in waterlogged soil pore could be released under the much larger water suction.In addition,the waterlogged soil has the strong water holding capacity and the weak soil hydraulic conductivity,which indicated that the water in the saturated soil can not be released and that the soil keeps high soil moisture.The above soil properties are the important reasons that the waterlogged soil remains a wet condition for a long time.These results could provide the technique supports for the control for waterlogged lands.关键词
黑土/坡耕地/涝渍地/土壤水分特征曲线Key words
black soil/slope cropland/waterlogged land/water retention characteristics分类
农业科技引用本文复制引用
马富亮,符素华,罗广惠..东北典型黑土区坡耕地涝渍地土壤持水性和导水性研究[J].水土保持研究,2017,24(6):222-226,5.基金项目
国家自然科学基金(41571259) （41571259）
国家自然科学基金重点项目(41530858) （41530858）
中国科学院“西部之光”人才培养引进计划的资助 （）
