摘要
本文根据农田土壤水分的零通量面确定作物最大吸水深度,提出了泾阳冬小麦较为适用的根系吸水模式。运用温度梯度和水分梯度共同作用下的农田土壤水分运动方程,模拟了1988年泾阳气象站试验田的冬小麦在拔节后期到成熟期这一时段农田土壤含水量的时空变化。与实测值相比,模拟效果较好。
A model for water uptake by winter wheat is developed in terms of the zero-flux plane for the determination of the maximum depth of water uptake of root. Using asoil water flowing epuation governed by the temperature and moisture gradients, a nu-merical simulation is made of the time-spatial change of soil water content during theperiod from the late stage of stem elongation to the ripening stage of wheat milk in theexperimental fields of the Jingyang Weather Station in1988. Results of the simulation arecompared with the data obtained from the winter farmland and agree fairly well with ac-tual observations for a simulated period of 31 days.
出处
《南京气象学院学报》
CSCD
1992年第2期73-81,共9页
Journal of Nanjing Institute of Meteorology
关键词
冬小麦
土壤
水分
农田
动态模拟
water content in the farmland soil
water uptake function
zero--flux plane
