不同盐结皮覆盖对土壤水分时空动态的影响

Effect of Salt Crust on Patio-temporal Distribution of Soil Moisture in Different Thickness

在喀什地区疏勒县盐结皮厚度2、3、5cm典型区域设置样地,利用数理统计方法比较分析了盐结皮覆盖土壤及无结皮覆盖(CK)土壤含水量,确定了不同土壤盐结皮厚度覆盖下的土壤水分时空分布动态。结果表明:上层土(0~30cm)变异性较大,中层土(30~40cm)有盐结皮覆盖的土壤含水量均大于无盐结皮覆盖的土壤含水量,下层土(40~50cm)在盐结皮较厚(3、5cm)时,有盐结皮覆盖的土壤含水量均大于无盐结皮覆盖的土壤含水量,在盐结皮较薄(2cm)时,无盐结皮覆盖的土壤含水量均大于有盐结皮覆盖的土壤含水量。研究表明不同厚度盐结皮覆盖会影响土壤水分的迁移,从而使不同层次的土壤含水量呈现不同的规律。

Setting typical sample plot of soil crust （2,3,5 cm） in Shule county,Kashgar area as research object.Using the mathematical statistics method analysis to the patio-temporal distribution of soil water in different soil salt crust.Set sample in typical area about salt crust thickness of the 2,3,5 cm.The results showed that soil moisture was bigger variability in upper layer soil（0-30 cm）.The soil moisture of crust covered were greater than no crust covered in middle soil（30-40 cm）.Soil moisture of crust covered were greater than no crust covered in the subsoil of salt crust thicker（3,5 cm）.Soil moisture of no crust covered were greater than crust covered in the subsoil of salt crust thinner（2 cm）.The results indicated that soil moisture was different in salt cover,soil moisture was different in the different present.