额济纳旗柽柳林土壤水分动态变化特征研究

shrubs in Ejina Banner

基于内蒙古额济纳旗土壤含水量、气象因子、地下水位和潜热的实测数据,分析了柽柳林不同时间尺度上土壤水分在不同深度的变化规律,以及各月份不同深度的土壤耗水率。根据已有观测数据分析得到:研究区土壤水分的主要补给来源是生态灌水,降水只能影响浅层的土壤;不同深度的土壤水分动态与土壤耗水率呈现显著的季节性规律且出现这种季节性规律的主要原因是柽柳生长过程中的蒸腾耗水。

Based on the measured data of soil moisture,meteorological factors,underground water level and latent heat in Ejina Banner of Inner Mongolia,we analyzed the variation rules of soil moisture at different depths in different time scales and soil water consumption rate at different depths in each month.According to the analysis,the main source of soil water is ecological irrigation;precipitation only affects the shallow soil.Soil moisture dynamics at different depths and soil water consumption rate show significant seasonal regularity,and the main reason for this seasonal regularity is water consumption by transpiration during the growth process of Tamarix.