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根据土壤水分运动方程建立了旱地农田土壤水分动态数值模拟模式，该模式利用作物发育期和一些参数估算作物根系深度和相对根密度垂直分布动态变化，避免过去必须对根系进行测定的困难，增强了模式的应用性能。通过参数敏感性检验和模式应用效果分析表明，该模式可用于干旱、半干旱气候区农田土壤水分预测，为分析作物水分利用和确定农田灌溉量提供科学依据。模式所需的输入为初始土壤含水量、土壤物理常数、作物播种期、逐日平均气温、相对湿度和降水量。
Based on the equation of soil water movement, a dynamic numerical simulation model of soil moisture in dryland farmland was established. This model used the crop development period and some parameters to estimate the dynamic changes of crop root depth and relative root density vertical distribution, and avoided the difficulty of measuring the root system in the past. Application performance model. Through parameter sensitivity test and pattern application effect analysis, this model can be used to predict soil moisture in arid and semi-arid climatic regions and provide a scientific basis for analyzing crop water use and determining irrigation amount. The inputs required for the model are initial soil moisture content, soil physical constants, crop seeding period, daily average temperature, relative humidity and precipitation.