基于修正作物系数模型半干旱区玉米腾发量估算  

Estimation of Maize Evapotranspiration in Semi-arid Based on Modified Crop Coefficient Model

作　　者：邬佳宾[1] 马玉峰[2] 郑和祥[1] 曹雪松[1] WU Jiabin;MA Yufeng;ZHENG Hexiang;Cao Xuesong(Institute of Water Resources for Pastoral Area of China Institute of Water Resources and Hydropower Research,Hohhot,Inner Mongolia 010020,China;Inner Mongolia Climate Center,Hohhot,Inner Mongolia 010051,China)

机构地区：[1]水利部牧区水利科学研究所,内蒙古呼和浩特010020 [2]内蒙古自治区气候中心,内蒙古呼和浩特010051

出　　处：《水利与建筑工程学报》2020年第5期25-29,共5页Journal of Water Resources and Architectural Engineering

基　　金：内蒙古自治区自然科学基金项目(2019MS05001);中国水利水电科学研究院科研专项(MK2019J02);通辽市科左中旗苏打盐碱化耕地改良技术模式研究与监测评价(202076)。

摘　　要：为准确估算半干旱区玉米腾发量,该研究通过田间实测气象数据、株高、叶面积指数、覆膜情况、水分及盐分胁迫等信息对基本作物系数(Kcb)和蒸发系数(Ke)进行修正,并基于Penman-Monteith模型,采用修正作物系数估算玉米蒸散量,并利用水量平衡法计算得到的玉米实际蒸散量对估算结果进行验证。结果表明修正作物系数法对于各生育阶段计算误差均低于3%,整个生育期的计算误差仅为1.9%,其计算精度优于单作物系数法和双作物系数法,可较为准确估算玉米各生育阶段及整个生育期的腾发量。In order to accurately estimate the evapotranspiration of maize in the semi-arid region,the basic crop coefficient(Kcb)and evaporation coefficient(Ke)were modified based on field meteorological data,plant height,leaf area index,film mulching,water and salt stress,and the evapotranspiration of maize was estimated by the Penman-Monteith model.The actual evapotranspiration calculated by water balance method was used to verify the estimated results.The calculation error of each growth stage is less than 3%,and the calculation error of the whole growth stage is only 1.9%.The results show that the modified crop coefficient method can more accurately estimate the evapotranspiration of each growth stage and the entire growth stage of maize.The modified crop coefficient model is more accurate than single crop coefficient method and double crop coefficient method in estimating maize evapotranspiration.

关 键 词：修正作物系数 半干旱区 玉米 腾发量 PENMAN-MONTEITH 

分 类 号：S274[农业科学—农业水土工程]