中文摘要：

根据2009年伊犁河灌区土壤监测和取样分析资料,运用半方差函数与克里格插值法,对伊犁河灌区灌溉期与非灌溉期土壤盐分含量变异特征进行了分析。结果表明：研究区耕层土壤53.68%样地呈非盐渍化土壤,18.38%为轻度盐渍化,13.97%为中度盐渍化,8.82%为重度盐渍化,5.15%为盐土。土壤盐渍化类型主要为硫酸盐渍土为主,占53.68%。盐分组成中,阴离子以SO42-、Cl-为主,阳离子以Na＋、Ca2＋离子为主。土壤含盐量与Cl-、SO24-分别为极显著、显著正相关,揭示了土壤盐分含量大小与Cl-、SO42-含量水平的高低有关。表层土壤平均含盐量占0～60cm土层平均含盐量的60.19%,即土壤盐分垂直分布呈现强烈表聚性。各时期各层土壤盐分拟合的理论模型都符合球状模型。在空间尺度上,土壤含盐量从研究区的东、北、南边区域向研究区中西部方向有增加的趋势。从时间尺度来看,6月表层土壤含盐量比3月土壤含盐量大,各月耕层土壤含盐量几乎差不多。灌溉期与非灌溉期土壤含盐量的空间变化主要表现为表层土壤含盐量的变化。

英文摘要：

According to monitoring and sample analysis of soil salinity in Eli River irrigated area,we analyzed the spatio-temporal variation of soil salinity in Eli River irrigated area,western Tianshan mountains,China,using variogram model and Kriging.Results of the study showed that 53.68% of root soil layer is non-salinized while 20.59% of the land slightly salinized,13.97% moderately salinized,8.09% strongly salinized and 3.67% saline soil.The type of soil salinization is mainly sulphate saline soil.Anions are mainly SO2-4、Cl-while cations are mainly Na＋、Ca2＋.The correlation between salinity and Cl-、SO2-4 is strongly positive significant,and positive significant,explaining that the degree of soil salinity depends on the contents of Cl-and SO2-4.The salinity of soil surface occupies 60.19% of 0~60cm soil layer,the vertical distribution of soil salinity for each soil profile presents surface gathering.The theoretical model for spatial distribution of soil salinity is accorded with spherical model in for each soil layer.The soil salinity increases,in the spatial scale,from eastern,northern and southern part to west of the research area.The surface soil layer salinity in June,in the temporal scale,is bigger than the surface soil layer salinity in March.The root zone soil salinity for each period is almost same,the special variation of soil salinity is expressed as the difference of surface soil salinity under irrigated and non-irrigated conditions.