摘要
本文通过对野外实测资料的分析计算，用多元非线性回归的方法，拟合了作物根系吸水的数学模型，建立了有作物生长条件下不同生育阶段表土相对蒸发强度Ｅ／Ｅ０与表土含水率θ的经验公式，为进行田间非饱和土壤水分运动的数值模拟奠定了基础。
In this Paper, a mathematical model of the crop root uptake is developed on the basis of analysis and calculation to the measured field data with the help of multiple nonlinear regression. According to the different growth stages of plant, the empirical relationships between the evaporation from soil surface and the water content at 10cm depth are proposed. Those lay foundation for the numerical simulation of soil moisture movement in field.
基金
国家基金委"八五"重大项目
关键词
含水率
非饱和土壤
水分
水分运动
数值模拟
negative pressure
water content
rate of crop root uptake
upper boundary
