生态与农村环境学报2018，Vol.34Issue(1)：64-73,10.DOI:10.11934/j.issn.1673-4831.2018.01.008
精河绿洲盐渍土表层土壤盐分因子的空间变异及分布格局
Analysis of Distribution Patterns and Spatial Variability of Soil Salinity Affecting Factors in Topsoil Layer of Salinized Soil in Jinghe Oasis
摘要
Abstract
Salt content, electrical conductivity ( EC) and pH of soil are the major factors in assessing salinization degree of the soil, so the study to quantify their spatial heterogeneities is the precursor of solving the problem of rapid diagnosis of soil salinization. The authors chose the Jinghe Oasis as their study area, and used the"3S" technology combined with the Google Earth in field survey. Results show:( 1) salt content and electrical conductivity in topsoil ( 0-10 cm) varied vigor-ously with variation coefficient being 1. 053 and 1. 146, respectively; soil electrical conductivity in the >10-20 cm soil layer reached 2. 385, indicating strong variability, too. However, pH was less than 10％ in variation coefficient in both the 0-10 cm and >10-20 cm soil layers, indicating mild spatial variability;( 2) the performance of the spatial interpolation method indicates that soils high in electrical conductivity and salt content in the 0-10 cm and>10-20 cm soil layers were concentrated mainly in the parts southeast and northwest to Lake Ebinur, where the soils were quite high in soil electrical conductivity, and salt content and in soil salinization degree too, as affected by natural and human factors;while the soils low in salinization degree were in the part west to Lake Ebinur, and the farmland-dominated center of the oasis, thanks to the high vegetation coverage. The distributions of pH values in the two soil layers did not exhibit any specific rule of varia-tion, but an interlacement of high and low pH values;(3) spatial autocorrelation index of soil salt content increased from 0. 306 in the 0-10 cm soil layer to 0. 527 in the>10-20 cm soil layer;and soil salt content in the study area displayed a trend of increasing gradually from southwest to east, regardless of soil layer, and spatially soil salt contents were strongly mutually-dependent. All the findings of the study demonstrate that the study is of great significance to timely following changes in salinization degree and soil salt content distribution, formulating reasonable land use policies and ecology im-provement measures for land use and realizing sustainable development of the region.关键词
盐渍土/空间变异/分布格局/精河绿洲Key words
salinized soil/spatial variability/distribution pattern/Jinghe Oasis分类
资源环境引用本文复制引用
张飞,李怡博,王东芳,王小平,张海威,陈丽华..精河绿洲盐渍土表层土壤盐分因子的空间变异及分布格局[J].生态与农村环境学报,2018,34(1):64-73,10.基金项目
国家自然科学基金(新疆联合本地优秀青年人才培养专项)(U1503302) （新疆联合本地优秀青年人才培养专项）
国家自然科学基金(41361045) （41361045）
自治区重点实验室专项资金(2014KL005) （2014KL005）
