Modeling evapotranspiration of greenhouse tomato under different water conditions based on the dual crop coefficient method

• Published in: Ying yong sheng tai xue bao Vol. 28; no. 4; p. 1255
• Main Authors: Gong, Xue Wen, Liu, Hao, Sun, Jing Sheng, Ma, Xiao Jian, Wang, Wan Ning, Cui, Yong Sheng
• Format: Journal Article
• Language: Chinese
• Published: China 18.04.2017
• Subjects: Agricultural Irrigation; China; Lycopersicon esculentum; Plant Transpiration; Soil; Water; crop coefficient; crop transpiration; water stress coefficient; solar greenhouse; soil evaporation
• ISSN: 1001-9332
• DOI: 10.13287/j.1001-9332.201704.009

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 (E ) of 20 cm pan evaporation, and two treatments were designed with full irrigation (0.9E ) and deficit irrigation (0.5E )] 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 (K ) and variation of water stress coefficient (K ) 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,