摘要
针对目前干旱区广泛存在的绿洲土壤次生盐渍化问题，基于GIS和地统计学方法，研究开都河流域下游绿洲焉耆县表层土壤的盐分空间变异特征。结果表明：1）0-10cm、10-20cm和20-30cm三层土壤盐分的半方差函数模型均符合高斯模型；随着土壤采样深度的增加，其空间变程递增，C0＋C均为50％，属于中等空间相关性。2）土壤盐分在水平方向上，0～5g／kg（非盐化和轻盐化）呈片状分布，而〉5g／kg（中度、重度盐化和盐土）呈斑块状分布在中部和低洼地区；在垂直方向上，0～10cm土壤盐分含量最高，且随着土层深度的增加，土壤盐分递减。
In order to study the problem of soil salinity in the oases of arid regions, traditional statistics and geostatistics combined with the geographical information system technology were applied to investigate the spatial variability and spatial distribution of soil salt content in Yanqi County of the oasis in the lower reaches of Kaidu River Basin. The results showed that semi variograms of soil salinity in 0-10 cm, 10- 20 cm and 20- 30 cm layers fitted the Gaussian model. The range of soil salinity was increasing with the increase of soil depth. The Co ＋C in three soil layers was 50%, between 25% and 75 %, and was moderate spatial variability. Analysis of spatial pattern of soil salinity on horizontal direction indicated that high values of soil salinity were mainly distributed on the middle and the lower-lying area. On the vertical direction, the salinity of soil in 0- 10 cm layer was highest,and it decreased gradually with the increase of soil depth.
出处
《地理与地理信息科学》
CSCD
北大核心
2014年第1期105-109,共5页
Geography and Geo-Information Science
基金
国家自然科学基金项目(41061025
41201032)
