应用生态学报2017，Vol.28Issue(4)：1255-1264,10.DOI:10.13287/j.1001-9332.201704.009
基于双作物系数法估算不同水分条件下温室番茄蒸发蒸腾量
Modeling evapotranspiration of greenhouse tomato under different water conditions based on the dual crop coefficient method
摘要
Abstract
An experiment was conducted to investigate soil evaporation (E),crop transpiration (T),evapotranspiration (ET) and the ratio of evaporation to evapotranspiration (E/ET) of drip-irrigated tomato,which was planted in a typical solar greenhouse in the North China,under different water conditions [irrigation amount was determined based on accumulated pan evaporation (Ep) of 20 cm pan evaporation,and two treatments were designed with full irrigation (0.9Ep) and deficit irrigation (0.5Ep)] at different growth stages in 2015 and 2016 at Xinxiang Comprehensive Experimental Station,Chinese Academy of Agricultural Sciences.Effects of deficit irrigation on crop coefficient (Kc) and variation of water stress coefficient (Ks) throughout the growing season were also discussed.E,T and ET of tomato were calculated with a dual crop coefficient approach,and compared with the measured data.Results indicated that E in the full irrigation was 21.5％ and 20.4％higher than that in the deficit irrigation in 2015 and 2016,respectively,accounting for 24.0％ and 25.0％ of ET in the whole growing season.The maximum E/ET was measured in the initial stage of tomato,while the minimum obtained in the middle stage.The Kc the full irrigation was 0.45,0.89,1.06 and 0.93 in the initial,development,middle,and late stage of tomato,and 0.45,0.89,0.87 and 0.41 the deficit irrigation.The Ks the deficit irrigation was 0.98,0.93,0.78 and 0.39 in the initial,development,middle,and late stage,respectively.The dual crop coefficient method could accurately estimate ET of greenhouse tomato under different water conditions in 2015 and 2016 seasons with the mean absolute error (MAE) of 0.36-0.48 mm · d-1,root mean square error (RMSE)of 0.44-0.65 mm · d-1.The method also estimated E and T accurately with MAE of 0.15-0.19 and 0.26-0.56 mm · d-1,and with RMSE of 0.20-0.24 and 0.33-0.72 mm · d-1,respectively.关键词
日光温室/土壤蒸发/作物蒸腾/作物系数/水分胁迫系数Key words
solar greenhouse/soil evaporation/crop transpiration/crop coefficient/water stress coefficient引用本文复制引用
龚雪文,刘浩,孙景生,马筱建,王万宁,崔永生..基于双作物系数法估算不同水分条件下温室番茄蒸发蒸腾量[J].应用生态学报,2017,28(4):1255-1264,10.基金项目
本文由国家高技术研究发展计划项目(2011AA100502)、国家自然科学基金项目(51009140)和中央级科研院所基本科研业务费专项(中国农业科学院农田灌溉研究所)资助 This work was supported by the National High-Tech Project of China (2011AA100502),the National Natural Science Foundation of China (51009140) and the Central Public-interest Scientific Institution Basal Research Fund (Farmland Irrigation Research Institute,Chinese Academy of Agricultural Sciences). （2011AA100502）
