Comparison show the swap 2 . 0 is an attractive and effective tool to obtain evapotranspiration for the study of relationship between crop yield and water use . a model of crop response to water based on bp neural network for spring wheat was developed using deficit irrigation experiment data 本文依据人工神经网络的基本原理在充分吸收其最新理论研究成果的基础上,以非充分灌溉试验得到的实测春小麦产量和各生育阶段水分资料为样本建立了基于bp神经网络的春小麦作物水分响应模型。