内蒙古河套灌区区域土壤质地空间变异分析——以解放闸灌域为例  

The spatial variation of soil texture in Hetao Irrigation District in Inner Mongolia

作　　者：张娜[1] 张栋良[1] 屈忠义[1] 王丽荣 

机构地区：[1]内蒙古农业大学水利与土木建筑工程学院,呼和浩特010018 [2]内蒙古河套灌区管理总局总干管理局五所,015400

出　　处：《干旱区资源与环境》2015年第12期155-163,共9页Journal of Arid Land Resources and Environment

基　　金：国家自然科学基金项目(51069006);内蒙古教育厅青年科技人才计划~A类项目(2012)联合资助

摘　　要：以内蒙古河套灌区解放闸灌域112个取样点448个土壤样本为基础,结合经典统计学与地统计学理论,对灌域内土壤质地及各粒级含量在不同土层（0～20cm、20～40cm、40～70cm与70～100cm）的空间变异性及空间分布规律进行研究。结果显示,利用地统计学方法进行最佳半方差函数拟合发现,除了0～20cm、20～40cm分布的粘粒为中等空间相关性,均为强烈空间相关性,说明各粒径的空间变异性主要是由其结构性因素决定的,随机性因素对该尺度下变量的空间变异性影响较小。灌域的土壤质地以壤土类为主,所占面积达到90%以上,且随着深度的增加,粘壤土类所占比例有增大的趋势,砂土类所占比例较小,在4.5%～6%之间,整体上从灌域上游到下游沿着总排干土壤质地由砂土类向粘壤土类递变。For analyzing the spatial variability and correlation of soil texture,the combined method of traditional statistical methods and geostatistics methods were compared based on the data of 112 sampling points in Jiefangzha irrigation area. The results showed that the spatial distribution of soil texture was found that it had relatively strong spatial correlation in addition to the surface of clay for medium spatial correlation by geostatistics analysis.Further analysis showed that the spatial variability of soil texture was depend on its consistent factors rather than random factors. Throughout the Jiefangzha irrigation area,the soil texture was mainly silt loam,occupied an area of more than 90%. With the depth increased,the proportion of clay loam class had a tendency to increase. The proportion of sand class remained unchanged,and the proportion was low between 4. 5% ～ 6%. From upstream to downstream along the trunk escape canal,the soil texture changed from sand class to loam class.

关 键 词：土壤质地 粒级 地统计学 空间变异 解放闸灌域 

分 类 号：S152.3[农业科学—土壤学]