title: [Estimation model for water requirement of greenhouse tomato under drip irrigation].
abstract: Based on the modified Penman-Monteith equation, and through the analysis of the relationships between crop coefficient and cumulative temperature, a new model for estimating the water requirement of greenhouse tomato under drip irrigation was built. The model was validated with the measured data of plant transpiration and soil evaporation in May 2-13 (flowering-fruit-developing stage) and June 9-20 (fruit-maturing stage) , 2009. This model was suitable for the estimation of reference evapotranspiration (ET(0)) in greenhouse. The crop coefficient of greenhouse tomato was correlated as a quadratic function of cumulative temperature. The mean relative error between measured and estimated values was less than 10%, being able to estimate the water requirement of greenhouse tomato under drip irrigation.
authors.affiliation: Ministry of Agriculture Key Laboratory for Crop Water Requirement and Regulation, Institute of Farmland Irrigation Research, Chinese Academy of Agricultural Sciences, Xinxiang 453003, Henan, China. liuhao-914@163.com
authors.forename: Hao
authors.initials: H
authors.lastname: Liu
authors.forename: Jing-Sheng
authors.initials: JS
authors.lastname: Sun
authors.forename: Yuan-Yuan
authors.initials: YY
authors.lastname: Liang
authors.forename: Cong-Cong
authors.initials: CC
authors.lastname: Wang
authors.forename: Ai-Wang
authors.initials: AW
authors.lastname: Duan
mesh_terms: D057914:Agricultural Irrigation / Q000379:methods*; D000383:Agriculture / Q000379:methods*; D004780:Environment, Controlled; D018551:Solanum lycopersicum / Q000254:growth & development* / Q000378:metabolism; D008962:Models, Theoretical; D018526:Plant Transpiration / Q000502:physiology; D014867:Water / Q000032:analysis*; D014872:Water Movements; D014881:Water Supply
chemical_list: D014867:Water