摘要
以衡水试验场沟播冬小麦田为例,建立了土壤沟垄微地形条件下土壤剖面二维饱和-非饱和水流运移的数学模型,对冬小麦生长条件下土壤水分的动态变化规律进行了模拟,揭示了人工微地形条件下典型时刻土壤水流动系统特征。结果表明:所建立的数学模型能较好地描述和模拟土壤剖面水分的运移过程和变化规律;土壤沟垄地形有利于形成局部优化的土壤水流动系统根系汇流系统;土壤沟垄地形优化土壤水流动系统的效果受零通量面发育深度的限制。
A two-dimensional saturated-unsaturated water flow mathematical model is established by considering ridge and furrow topography of the soil surface with a case study of winter wheat field in Hengshui experimental field. The dynamic regime of soil water during the growth of winter wheat is simulated and the characters of soil water flow systems are also revealed for the artificial ridge and furrow topography of the soil surface during typical periods. The results show that： ①the mathematical model can effectively depict and simulate the movement process and the change rule of soil water in the profile; ②ridge and furrow topography of the soil surface can be propitious to form the local soil water-root zoon flow system;③the effect of optimize soil water flow system in ridge and furrow topography of the soil surface is restrained by the zero flux plane.
出处
《中国农村水利水电》
北大核心
2006年第2期35-37,40,共4页
China Rural Water and Hydropower
基金
国家自然科学基金项目(49972083)
中国地质调查局地质调查项目(199920150061-2)共同资助
关键词
沟播
冬小麦
土壤水流动系统
模拟
furrow sowing
winter wheat
soil water flow system
simulation
