【摘要】 通过对土壤—作物—大气系统的动态分析，应用本模式只需常规气象资料即可逐旬模拟出土壤水分变化，对照棉田各生育期的实际需水量，为科学灌溉提供理论依据。对比实测值与模拟曲线的结果，表明两者在变化趋势上具有明显的一致性。更多还原

【Abstract】 Based on the dynamic analysis of soil－ plant－ atmosphere system(SPAS),only a few of routine meteorological factors were used to simulate the variation of soil moisture every ten days by using the simulated model.Compared to the water requirements of cotton field in each growing period,the simulation provides theoretic references for scientific irrigation.Two curves that stand for observed and simulated data show obviously the same trends.更多还原