实时灌溉模型中作物根区土壤含水率计算方法及应用  

Calculation Method of Soil Moisture Content in Crop Root Zone and Its Application in the Real-time Irrigation Model

作　　者：马建琴[1] 何胜[2] 宋智睿[2] 

机构地区：[1]华北水利水电大学人事处,郑州450011 [2]华北水利水电大学水利学院,郑州450011

出　　处：《灌溉排水学报》2015年第4期19-23,共5页Journal of Irrigation and Drainage

基　　金：水利部948项目(201047);国家自然科学基金项目(41071025);河南省2006年骨干教师资助项目;华北水利水电大学高层次人才启动项目(200514);2009年度河南省教育厅自然科学研究资助项目(2009A170004)

摘　　要：为了改进作物实时灌溉模型中土壤墒情的取值方法、提高实时灌溉预报的精度,针对已有研究模型中土壤墒情的取值方法不符合作物生长规律的问题,在充分考虑冬小麦根系随土壤深度分布规律和吸收水分特点的情况下,采用变异系数法计算了冬小麦计划湿润层内各土层土壤含水率的权重,并应用在郑州地区不同水分处理的冬小麦实时灌溉模型中。结果表明,权重法计算的日土壤含水率和灌水总量更符合试验区冬小麦生长规律和灌溉定额标准。In order to improve accessor methods of soil moisture in real-time irrigation model and the accuracy of real-time irrigation forecasting, in view of deficiency that the existing research mode moisture in accessor methods did not conform to the crop growth rule, variation coefficient mett used to calculate the weight of each soil layer in full consideration of winter wheat root system v depth absorbs moisture distribution and the characteristics of the cases, and the weight was applie ferent water treatments in Zhengzhou area in the real-time irrigation model of winter wheat. The showed that soil moisture content and irrigation quota based on weight method conformed to the winter wheat growth and irrigation quota standards in experimental zone. Therefore, the weight had high accuracy.

关 键 词：实时灌溉 土壤含水率 变异系数法 计划湿润层 权重 

分 类 号：S152.7[农业科学—土壤学]