中文摘要：

通过对低覆盖度（15%~30%）行带式赤峰杨固沙林不同部位降雨量和土壤含水量的定位观测,探讨了行带式分布格局下固沙林不同部位的土壤水分特征和时空动态变化。结果表明,在行带式这种特殊的分布格局下,在垂直于林带的方向上,土壤水分分布总体上表现出明显的区域差别。根据土壤水分空间分布规律发现,低覆盖度行带式分布格局的固沙林林带内存在水分利用带和入渗补给带;在0-40cm深度水分利用带和入渗补给带土壤水分含量受降雨量影响上下波动剧烈,但入渗补给带和带间6m处水分利用带土壤水分含量对于降雨的响应较18m处利用带更加敏感;40-160cm深度,土壤水分含量受降雨量和林带蒸腾耗水影响,入渗补给带对水分利用带的土壤水分具有一定的补给调控作用。

英文摘要：

In order to study soil water characteristics and its space-time dynamic change in different position of sand fixing forest under belt scheme,rainfall and soil water content were observed in different position of low-covered（15% ~30%）Chifeng poplar sand fixing forest belts.The results showed that the soil water distribution generally showed significantly regional difference in the direction perpendicular to forest belts.There existed main utilization belt of soil moisture on the north and south sides of belts and supplying belt of soil water leakage in the middle of belts from the spatial distribution pattern of soil water.In the depth of 0-40 cm,the soil moisture content of main utilization belt of soil moisture and supplying belt of soil water leakage fluctuated violently by rainfall affected,furthermore,the soil water content of supplying belt and south main utilization belt were more sensitive to rainfall than soil water of north main utilization belt.In the depth of 40-160 cm,the soil water content was affected by rainfall and belts evapotranspiration consumption,the soil water content of supplying belt had a certain supplying and regulating effects on that of main utilization belt.