摘要
根据Philip、DeVries和Milly提出的土壤水热流动理论 ,建立了地膜覆盖冬小麦农田的土壤水热迁移的数值模型 ,上边界条件根据地膜的光学特性和气象参数确定 .模拟结果与实测结果符合较好 .在此基础上 ,通过逐步回归分析 ,对地膜覆盖情况下作物蒸腾量的变化原因进行了分析 .
In this paper, a coupled numerical model, physically based on the soil water heat transfer theory by Philip, de Vries and Milly, was developed to simulate water and heat transfer of the winter wheat field mulched by transparent polyethylene. Depending on the film's optical characteristics and meteorological factor, the up boundary condition was ascertained. The simulated value showed good agreement with the measured data. Besides, the cause of crop transpiration changes was analyzed by gradual regression method.
出处
《武汉水利电力大学学报》
CSCD
2000年第4期1-4,共4页
Engineering Journal of Wuhan University
基金
国家自然科学基金重点项目! (5983932 0 )
关键词
地膜覆盖
水热动态
耦合模型
蒸腾量
作物
土壤
transparent polyethylene mulch
water heat transfer
coupled model
transpiration
