农牧交错带缓坡丘陵土壤水分空间分布特征——以内蒙古后山为例  

Characteristics of Spatial Distribution of Soil Water in Houshan Gentle Slope Hill Region of Ecotone in Inner Mongolia

作　　者：李忠辉[1] 郑大玮[1] 李晓娜[1] 杰格尔[1] 

机构地区：[1]中国农业大学资源与环境学院,北京100094

出　　处：《中国农业气象》2004年第3期49-51,共3页Chinese Journal of Agrometeorology

基　　金：国家重点攻关项目的课题"北方旱区农牧交错带防沙型农业发展模式与技术研究"(2 0 0 1BA5 08B12 );国家重点基础研究发展规划项目"草地与农牧交错带生态系统重建及优化生态 -生产范式"课题"农林牧系统复合与生产力耦合机制"(G2 0 0 0 0 186 0 6 )

摘　　要：通过对内蒙古农牧交错带缓坡丘陵区不同部位和深度处土壤水分的观测和分析 ,发现 :农牧交错带缓坡丘陵的土壤水分分布受坡度、坡向、坡位、植被类型等因素的影响 ,表现出一定的空间变异特性。在坡度为 3°～4°的缓坡丘陵上 ,土壤水分以阳坡 (南坡 )为最高 ,阴坡 (北坡 )次之 ,顶部最低。不同部位因贮水量不同造成植物生物量存在差异 ,顶部的生物量小于南北坡的生物量。同时发现 ,不同部位土壤中有干土层出现 ,不同季节干层深浅不同。The characteristics of spatial distribution of soil water in Houshan gentle slope hill region of ecotone in the Inner Mongolia was studied.The results showed that the soil water content was highest in the south slopes, the lowest on the top of the slopes and medium in the north slopes in the gentle slopes of 3-4 degree.The crop biomass in the different positions of the gentle slope hills was different due to the differences of soil water contents.The biomass on the top of the slopes was lower than that in the south and north slopes.The reasons for the occurrence of dry soil layer in the different depth were discussed.

关 键 词：农牧交错带 缓坡丘陵 土壤水分 空间分布特征 

分 类 号：S152.7[农业科学—土壤学]