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采用烘干称重法对海晏县城和西海镇附近沙柳林地土壤水分进行研究.结果表明:位于河漫滩上的海晏城附近的沙柳林土壤含水量高,平均含水量为25.1%,土壤水分能够满足沙柳林的正常生长;位于一级阶地上的西海镇沙柳林土壤上部1m范围内含水量较高,平均含水量为19.3%,1m以下含水量很低,有土壤干层发育.这表明,在该区自然降水条件下,除地形低洼、地下水很浅的河漫滩地区之外,土壤水分不能满足人工林正常生长需要.该区沙柳林土壤水分收入小于支出,具有负平衡的特点.该区土壤上部1.0m深度范围内以粉砂为主,孔隙度较高,土质优良,但1.0m以下以粗砂和细砾石为主,土质较差.
The results showed that the soil moisture content of Salix psammophila near Haiyan city located on floodplain was high, with an average water content of 25.1%. Soil Moisture can satisfy the normal growth of Salix psammophila. The water content of Shaliulin in the upper reaches of Xihai town located on the first terrace is high, with an average water content of 19.3% and a moisture content below 1m, with the development of soil dry layer .This shows that under the condition of natural precipitation in this area, soil moisture can not meet the need of normal growth of the plantation, except for low landform and shallow groundwater floodplain area.The soil water income of this plantation is lower than the expenditure and has a negative balance In the upper 1.0m depth of the soil, silt is the main part of the soil, which has high porosity and good soil quality, but coarse sand and fine gravel are the main components below 1.0m, with poor soil quality.