锡林河流域栗钙土及其物理性状与水分动态的研究  

Study on the Soil Water Dynamic and Physical Characteristic of Chestnut Soil in Xilin River Basin.

作　　者：李绍良[1] 陈有君[1] 

机构地区：[1]内蒙古农业大学

出　　处：《中国草地》1999年第3期71-76,共6页Grassland of China

基　　金：内蒙古自然科学基金;中国科学院内蒙古草原生态系统定位研究站基金;中国科学院网络项目基金

摘　　要：锡林河流域栗钙土具有典型的草原土壤特征。土壤水分是生产力主要的制约因素，水分状况受到天然降水及土壤性状的影响，水分特征曲线研究表明，土壤持水力与质地及有机质含量有密切关系，水分有效性主要取决于土壤含水量及释水性。土壤水分动态有明显的阶段性变化规律。地形、母质、地表状况、质地及剖面特征决定了水分空间变异情况，长期低水平的水分循环是栗钙土生产力不高。Chestnut soil in Xilin river basin has the property of typical grassland soil. Soil water is the control factor of plant productivity, but it is affected by rain fall. The study of soil water characteristic shows that water retention ability of the soil relates closely with soil texture and organic matter content. Availability of soil water is mainly determined by soil water content and soil moisture liberated ability. Soil moisture dynamic varys with seasonal pattern. Soil moisture spacial variability is determined by soil texture, profile and above ground condition. The low and unstable plant productivity is caused by persistent low water balance.\=

关 键 词：栗钙土 土壤物理 锡林河流域 土壤水分 草原土壤 

分 类 号：S812.2[农业科学—草业科学]