滞后效应对冬小麦根系吸水的影响

Effect of Soil Water Hysteresis on Winter Wheat Roots Uptake Water

根据一维土柱垂直入渗、再分布和根系吸水试验，用有限差分法进行了考虑和忽略滞后效应的数学模拟，分析了土娄土再分布过程中土壤含水量、水势的分布，在此基础上又借助于根区土壤水分运动方程计算了根系吸水速率的剖面分布。研究结果表明。

The experiments of soil water redistribution and roots uptake water were done in the vertical columns. A finite difference method incorporating Mualems model were used to investigate the sensitivity of hysteresis based on computed water content profile and rates of roots uptake water in the volumns. Comparing simulated results with measured values showed that the accuracy of the involved hysteretic model was better than that of the ignored hysteretic models.