作物腾发量实时预报与田间试验验证  

Real-time estimation of crop evaportranspiration and its validation by field experiments

作　　者：蔡甲冰[1] 刘钰[1] 许迪[1] 

机构地区：[1]国家节水灌溉北京工程技术研究中心

出　　处：《水利学报》2008年第6期674-679,687,共7页Journal of Hydraulic Engineering

基　　金：973研究计划资助项目(2006CB403405);863计划项目(2006AA100208-4);国家自然科学基金资助项目(50479043)

摘　　要：获得实时、有效的作物腾发量数据是进行实时灌溉预报的基础和难点。本文根据公共的天气预报信息,提出了实时的估算作物腾发量的方法流程,并利用作物根区土壤水量平衡方程,用冬小麦田间灌溉试验的土壤水分数据对该模型和方法进行了检验;同时为检验实时参照腾发量估算方法的可靠性和实用性,对当地媒体发布的实际天气预报信息与实际气象观测值进行了对比。结果表明,在现有天气预报准确度条件下,该方法可以有效的实时估算作物腾发量,为田间实时灌溉管理与决策提供较为可靠的参数。The collection of real-time and effective data of crop water demand is the foundation of realtime irrigation forecasting. A model for real-time estimation of crop water demand based on public weather forecast message is developed and its validity is verified by soil water data of field experiment for winter wheat. The balance equation is applied to study the soil water content in the vicinity of crop root. For further examining the reliability and applicability of the method in estimating the real-time reference evaportranspiration the actual weather forecast messages is digitized and compared with the observation data obtained from auto weather monitoring station. The result shows that the proposed method based on current public weather forecast is effective.

关 键 词：天气预报 土壤含水量 实时预报 作物腾发量 冬小麦 

分 类 号：S274.1[农业科学—农业水土工程]