干旱地区农业研究Issue(4)：1-10,37,11.
基于 DSSAT 模型陕西杨凌不同降水年型冬小麦灌溉制度研究
Determination of irrigation schedule of winter wheat in different hydrological years in Yangling,Shaanxi Province based on DSSAT model
摘要
Abstract
In the arid and semiarid areas of northwest China ,the land ,light and heat resources are relatively rich but water resource is much short .Water is the main limiting factor in exploring the productive potential of light and tem-perature in these areas .In order to realize highly efficient agricultural production and sustainable development ,it is es-sential to raise the use efficiency of water resource according to the water requirement and water-stress response of crops in different growing stages .By using DSSAT model ,the productive potential of winter wheat in different hydrological years in Yangling ,Shaanxi Province was simulated ,the effects of irrigation in different stages on yield ,WUE and soil e-vaporation were analyzed ,and the key irrigation periods were determined .Furthermore ,the optimal irrigation schedule of winter wheat in different hydrological years was made by considering yield ,WUE ,total irrigation amount and irrigation times comprehensively .The results showed :(1) Among the four times of irrigation during the growing period of winter wheat ,revival water was most critical ,next was jointing water ,and winter water and grain filling water were the last . When there was no revival water ,the yield and transpiration of winter wheat were decreased significantly ,and the soil e-vaporation was increased significantly .(2) There were also remarkable differences among different hydrological years . The yield ,WUE and crop transpiration in wet years were slightly higher than those in normal years ,and both of them were significantly higher than those in dry years .As for the marginal benefit of irrigation ,different hydrological years were ranked as :normal years>dry years>wet years .(3) The optimal irrigation schedule of winter wheat in different hy-drological years was :75 mm of revival water and 50 mm of jointing water in dry years ,75 mm of revival water in normal years ,and 25 mm of revival water and 25 mm of jointing water in wet years .关键词
DSSAT模型/节水灌溉/冬小麦/关中地区Key words
DSSAT model/water-saving irrigation/winter wheat/Central Shaanxi分类
农业科技引用本文复制引用
王文佳,冯浩,宋献方..基于 DSSAT 模型陕西杨凌不同降水年型冬小麦灌溉制度研究[J].干旱地区农业研究,2013,(4):1-10,37,11.基金项目
国家863计划课题（2013AA102904，2011AA100503）；高等学校学科创新引智计划资助 （）
