旱塬区不同地带耕地土壤水分动态变化研究

为探明土壤水分在不同地带的变化特征，于2011年10、11月和2012年2—5月采集渭南塬耕地以及渭河边附近耕地的土壤样本进行了土壤水分含量的测定分析。研究结果表明：由于降水和地下水位等因素的影响，渭河附近耕地含水量大于塬上耕地，渭河附近耕地含水量变化大于塬上耕地。2011年10、11月和2012年2月由于受冬季气候的影响，土壤含水量较高，而2012年3、4和5月受春旱的影响，土壤含水量数值偏低。

Study on Soil Water Dynamic Change of Cultivated Land in Different Areas

In order to verify the variation characteristics of soil moisture in the same ways of land patterns, this paper analyzes soil samples of 2011 October, November and 2012,February March, April and May in the acquisition of Weinan plateau and Weihe near the farmland and measures the moisture content of soil by means of adopting the drying method. The result shows that, due to the precipitation and groundwater level, the farmland water contents near Weihe is higher than that in plateau land. The variation of moisture content near Weihe is generally greater than that in plateau land.In October, November and February, as a result of the effects of the winter climate, the figure of soil water contents is relatively high. While in March, April and May, affected by drought, the figure of soil water contents is generally low.