应用双作物系数模型估算温室番茄耗水量  

Application of the dual crop coefficient model for estimating tomato evapotranspiration in greenhouse

作　　者：邱让建[1,2] 杜太生[2] 陈任强 

机构地区：[1]南京信息工程大学江苏省农业气象重点实验室,江苏南京210044 [2]中国农业大学中国农业水问题研究中心,北京100083

出　　处：《水利学报》2015年第6期678-686,共9页Journal of Hydraulic Engineering

基　　金：国家自然科学基金项目(51321001;51222905);国家高技术研究发展计划(863计划)课题(2011AA100502);水利部公益项目(201001061);南京信息工程大学人才启动经费(2014r049)

摘　　要：准确估算作物耗水量对于合理利用有限的水资源和制定合理的灌溉制度至关重要。本文利用3个生长季的西北地区日光温室番茄水量平衡计算耗水资料,率定和验证双作物系数模型SIMDual Kc在日光温室条件下的适用性。结果表明耗水模拟值与实测值有较好的一致性。模型估算的平均标准误差为0.55 mm·d-1,平均绝对误差为0.44 mm·d-1。模型估算的番茄初期、中期和后期的基础作物系数分别为0.50、0.85和0.55。番茄生育初期蒸发占耗水的比例最大为22.8%;发育期最小,仅为3.2%。3年全生育期总蒸发量占总耗水量的比例平均为5.9%,表明温室生产中植株蒸腾为耗水最主要部分。An accurate estimation evapotranspiration （ET） is critical for precise water resource management and reasonable irrigation scheduling. In this study, the dual crop coefficient model, SIMDualKc, was vali- dated and verified to estimate ETc of tomato based on 3-season data calculated by water balance method in a greenhouse in Northwest China. Results show good agreement between observed and estimated ET throughout the season. The estimation errors were small with average root mean square error of 0.55 mm·d-1 and mean absolute error of 0.44 mm·d-1. The value 0.50, 0.85 and 0.55 were obtained for, respectively, the initial, mid-season and late basal crop coefficients. The evaporation （E） was highest with 22.8 % of ETc during the initial stage and lowest with 3.2 % of ET during crop development stage. The average seasonal E accounted for 5.9 % of ETc for all three seasons, indicating transpiration was the dominant compo- nent of ET of tomato grown in greenhouse over the full crop season.

关 键 词：SIMDualKc 耗水 作物系数 温室 番茄 

分 类 号：S274[农业科学—农业水土工程]