几种大田作物水分-产量模型及其应用  

Field crop water-yield models and their applications

作　　者：张恒嘉[1] 

机构地区：[1]甘肃农业大学工学院水利系,兰州730070

出　　处：《中国生态农业学报》2009年第5期997-1001,共5页Chinese Journal of Eco-Agriculture

基　　金：国家自然科学基金项目(40801044);甘肃省高等学校研究生导师科研计划项目(0602-05)资助

摘　　要：本文介绍了几种大田作物(小麦、玉米、棉花等)水分-产量模型(即水分生产函数)国内外研究现状,阐明了各种模型之间的本质区别与内在联系。依据部分灌区的田间试验数据,在全生育期采用二次抛物线模型、各生育阶段采用Jensen模型,并且运用最小二乘法原理,拟合了不同作物的水分生产函数,得出作物不同生育阶段的水分敏感指数,发现不同作物敏感指数值呈前期小、中期大、后期又变小的变化趋势且与农业灌溉实际相符,这一结论可为资源性缺水区域制定优化灌溉制度提供理论依据。In this paper,crop water-production functions,namely crop water-yield models,of wheat,maize and cotton were analyzed and intrinsic relations among the different models advanced.Models of water-production function of different crops were fitted based on least-square theory using field experimental data from various irrigation regions,with quadratic model used for the whole growth period and Jensen model for growth stages.Water sensitivity index resulting from the fitting shows a low-high-low trend during the growth period.The results could provide agricultural irrigation practice with vital reliable academic hits to optimize irrigation systems in water deficient regions.

关 键 词：灌水量 蒸发蒸腾量 水分敏感指数 水分生产函数 最小二乘法原理 大田作物 

分 类 号：S181[农业科学—农业基础科学]