灌溉排水学报2012，Vol.31Issue(5)：136-139,4.
河西绿洲灌区主要作物需水量及作物系数试验研究
Research on Main Crops Water Requirement and Crop Coefficient in Oasis Irrigation Region
摘要
Abstract
According to the data of the field tests conducted from 2006 to 2009 in Hexi oasis irrigation region,reference crop evaporations of the main crops(spring wheat,maize,potato) in different stages were gained based on the equation of Penman-Monteith formula and the evapotranspiration was determined by water balance equation and soil water stress coefficient formula.From these methods,crops water requirement and crops coefficient under insufficient irrigation were determined.The results showed that: the rule of crop water requirement of the main crops in different stages was the same trend under insufficient irrigation and sufficient irrigation.The average crop coefficients of spring wheat,maize and potato were respectively 0.81,0.7,and 0.73 in the whole growth period under insufficient irrigation.With the continued growth,the ratio of leaf transpiration was gradually increasing and soil evaporation was gradually decreasing.The ratios of soil evaporation to evapotranspiration of wheat,maize and potato were respectively 37%,39%,45%,and the ratios of leaf transpiration of wheat,maize and potato were respectively 63%,61%,55%.关键词
作物需水量/作物系数/非充分灌溉/河西绿洲灌区Key words
crops water requirement/crop coefficient/Insufficient Irrigation/in Oasis Irrigation Region分类
农业科技引用本文复制引用
连彩云,马忠明,吕晓东,曹诗瑜..河西绿洲灌区主要作物需水量及作物系数试验研究[J].灌溉排水学报,2012,31(5):136-139,4.基金项目
农业部948项目 （）
