基于水汽扩散理论的水稻需水量数学模型  

Crop Water Requirement Mathematical Model Based on Vapor Diffusion Theory

作　　者：戚颖[1,2] 赵雨森[1] 王斌[2] 朱士江[2] 

机构地区：[1]东北林业大学林学院,黑龙江哈尔滨150040 [2]东北农业大学水利与建筑学院,黑龙江哈尔滨150030

出　　处：《安徽农业科学》2014年第12期3473-3475,3529,共4页Journal of Anhui Agricultural Sciences

基　　金：国家科技支撑计划项目(2009BADB3B04);国家自然科学基金资助项目(51009026;41271046)

摘　　要：首先分析了气象要素包括气温、风速、空气饱和差、日照时数及蒸发量对水稻需水量的影响。然后,根据水汽扩散理论建立需水量基本方程,考虑气象要素对水汽交换系数的影响,建立水汽交换系数公式,从而导出计算水稻需水量的五因素数学模型。将该数学模型FAO56 Penman-Monteith公式需水量模型在寒地稻区进行对比分析。结果表明,该模型比Penman-Monteith公式具有较高的精度,可以作为区域性计算公式在稻作灌区中应用。The effects of meteorological factors including temperature, wind velocity, air saturation deficit, sunshine hours and evaporation on rice water requirement were analyzed. And then, according to vapor diffusion theory, the basic equation for rice water requirement was estab- lished. Considering influences of meteorological factors on exchange coefficient of vapor, the equation for exchange coefficient of vapor was es- tablished. At last, the final mathematical model for crop water requirement was got. This model and FAO56 Penman-Monteith equation were used to calculate rice water requirement in cold area. The results showed that this model has a more accuracy, compared with Penman- Monteith equation. As a regional empirical equation, it can be applied in cold area.

关 键 词：需水量 扩散理论 节水灌溉 PM公式 

分 类 号：TV122[水利工程—水文学及水资源]