逐日作物需水量预测数学模型研究  

Study of Mathematic Model for Forecasting Daily Crop Evapotranspiration

作　　者：茆智[1] 李远华[1] 李会昌[1] 

机构地区：[1]武汉水利电力大学水利工程系

出　　处：《武汉水利电力大学学报》1995年第3期253-259,共7页Engineering Journal of Wuhan University

基　　金：水利水电科学基金

摘　　要：根据理论探讨以及对河北与广西旱作物和水稻灌溉试验实测成果的分析，提出了预测逐日参照需水量的方法与模型，探究作物正常供水和水分胁迫条件下需水量、作物系数及士壤水分胁迫修正系数的变化规律，提出了计算作物系数与土壤水分胁迫系数的数学模型；据此，提出了预测逐日作物需水量的方法与模型，并介绍应用实例．理论分析与实际应用的结果表明，所提的方法与模型理论严密、精度较高．Based on the theoretical study and analysis of the experimental data, the method and models for forecasting daily reference evapotranspiration are presented. The variation regularity of crop evapotranspiration, crop coefficient and water stress modified coefficient under normal and deficit irrigation are discussed and the models for calculating crop coefficient and water stress modified coefficient ate presented. Then, the method and mathematic models for forecasting daily crop evapotranspiration have been established. Finally, an example of applying the above models are introduced. It is shown through the application that the precision of forecast by using these models is high.

关 键 词：水稻 需水量 数学模型 灌溉 预测 

分 类 号：S511.071[农业科学—作物学]