沙地土壤水分特征及水分时空动态分析

通过对宁夏盐池沙地不同立地类型土壤水分连续两年的定位观测,探讨了固定沙丘不同部位、不同立地的沙柳林地和柠条林地的土壤水分特征和时空动态变化。结果表明:柠条林地的土壤容重最小,而保水能力最好。各样地土壤水分垂直分布总体表现出明显的分层特征,可划分为3层:土壤水分低值层、土壤水分活跃层、土壤水分相对稳定层,每一层的厚度因不同的立地类型而不同。

Study on the Temporal and Spacial Change of Soil Water Content and Soil Moisture Characteristics of Sandy Land

Based on two years of continuous located observation of soil moisture of Salix psammophila and Caragana korshinskii woodland with different site conditions in Yanchi,Ningxia province,this paper discusses the spatiotemporal dynamic change of soil water content and soil moisture characteristics of sandy land grown on different parts of sandy region and different site conditions.The results showed that Caragana korshinskii woodland have the lowest soil bulk density,but the highest water retention capacity.Water distribution along soil profile different research samples showed obvious layered features,there are three layers:low-level layer,active layer and stable layer,and the thickness of each layer is different because of different site conditions.