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依据定位观测数据，对紫色土丘陵区农用地土壤水分的动态变化规律进行了初步研究。结果表明，该区农用地土壤水分的季节变化主要受降水、蒸发和土地利用状况的影响，呈现出明显的三峰三谷型；垂直梯度变化由于受降雨入渗分布与土壤水分向上蒸发的综合作用，基本表现为增长型。并利用标准差和变异系数对土壤水分的垂直梯度变化进行了具体描述和层次划分。最后，通过分析该地区典型农作物及其不同栽培方式对农用地土壤水分的影响，认为优化农作物栽培方式是提高紫色土丘陵区农用地土壤水分利用效率和减少水土流失的有效途径。
Based on the observed data, the dynamic changes of soil moisture in agricultural land in purple soil hilly region were studied. The results showed that the seasonal variation of soil moisture in farmland in this area was mainly influenced by precipitation, evaporation and land use, showing obvious three-peak and three-valley patterns. Due to the combined effect of rainfall infiltration and upward evaporation of soil moisture, The basic performance of growth. The standard deviation and coefficient of variation were used to describe and classify the vertical gradient of soil moisture. Finally, by analyzing the impact of typical crops and their different cultivation methods on soil moisture in agricultural land, it is considered that optimizing crop cultivation is an effective way to improve soil water use efficiency and reduce soil erosion in hilly purple soil region.