基于空间分析的北疆残余盐土盐分变异性研究  

Research on Soil Salt Heterogeneity for Residual Solonchak Based on Spatial Analysis in the Northern of Xinjiang

作　　者：卢响军[1] 盛建东[1] 武红旗[1] 王新军[1] 李美婷[1] 

机构地区：[1]新疆农业大学草业与环境科学学院,新疆乌鲁木齐830052

出　　处：《地理与地理信息科学》2012年第4期75-78,106,共5页Geography and Geo-Information Science

基　　金：国家公益性行业(农业)科研专项经费项目(200903001-3);新疆土壤学重点学科基金项目

摘　　要：应用统计学与空间分析相结合的方法,对北疆典型残余盐土区不同土层土壤盐分的空间分布特征及其变化规律进行对比分析。结果显示,随着土层深度的增加土壤盐分依次增大,底聚现象比较明显;30cm以下土壤盐分相关性较强,土壤母质等结构性因素成为影响土壤盐分空间变异的主导因素;表层土壤盐分之间的自相关距明显大于中、底层;随着土层深度的增加,土壤盐分间的Moran's I系数增大,高-高聚集区域明显增大,主要集中在荒地区域。该研究结果将为北疆残余盐土区域土壤盐渍化改良及农业管理提供理论依据。Spatial distributing characteristics and change pattern of salt at different soil layers for typical residual solonchak in the northern Xinjiang were compared,through the methods of combining statistics with spatial analysis.The results showed that the soil salinity was significantly increasing with the extension of soil depth.The phenomenon of bottom gathering was very evident.Relativity of soil salt was rather significant in the soil layer under 30 cm;soil parent materials related to structural factors became a main factor affecting spatial variance of soil salt.Autocorrelation distance between soil salts on the surface layer was obviously bigger than mid-under layer.Moran indexes became bigger with the extension of soil depth.＂High-High＂ spatial aggregated extents for soil salt became larger,and mainly congregated the unreclaimed tract.The study results will provide scientific evidence to improve agricultural manage ment of salinity land for residual solonchak areas in the northern Xinjiang.

关 键 词：玛纳斯河 残余盐土 空间自相关 地统计学 Moran's I系数 

分 类 号：P934[天文地球—自然地理学] S156.4[农业科学—土壤学]