应用生态学报2013，Vol.24Issue(8)：2222-2228,7.
石羊河流域武威绿洲春玉米水氮耦合效应
Coupling effect of water and nitrogen on spring maize in Wuwei Oasis of Shiyang River Basin, Northwest China
摘要
Abstract
To explore the optimal supply model of water and nitrogen for spring maize under linited irrigation in arid Northwest China,a field experiment with orthogonal design was conducted in the Wuwei Oasis region margin of Shiyang River Basin to study the effects of irrigation amount at different growth stages and the nitrogen application rate on the group yield and the water and nitrogen utilization of spring maize.With the increase of nitrogen application rate,the grain yield of spring maize increased,and the highest grain yield was obtained when the nitrogen application rate was 300 kg · hm-2 and the irrigation amount at jointing stage was 136 mm.The grain irrigation water use efficiency (GIWUE) decreased with increasing irrigation amount.When the irrigation amount in whole growth period was 340 mm,the grain yield and GIWUE were improved simultaneously with increasing nitrogen application rate.The GIWUE reached the maximum when the nitrogen application rate was 300 kg · hm-2 and the irrigation amount at seedling and grain-filling stages was 34 mm,respectively.The effects of nitrogen application and irrigation on the nitrogen accumulation in the whole plant decreased in the order of nitrogen application rate,irrigation at jointing stage,irrigation at seedling stage,irrigation at grain-filling stage,and irrigation at heading stage.The optimal supply model of water and nitrogen for spring maize in Wuwei Oasis was 300 kg · hm-2 of nitrogen application plus 34,136,68 and 102 mm of irrigation at seedling,jointing,heading and grain-filling stages,respectively.关键词
春玉米/水氮耦合效应/节水灌溉/石羊河流域武威绿洲Key words
spring maize/coupling effect of water and nitrogen/saving water irrigation/Wuwei Oasis of Shiyang River Basin分类
农业科技引用本文复制引用
刘小刚,张富仓,杨启良,田育丰,李志军..石羊河流域武威绿洲春玉米水氮耦合效应[J].应用生态学报,2013,24(8):2222-2228,7.基金项目
国家自然科学基金项目(50879073,51109102,51009073)、云南省应用基础研究项目(2010ZC043)、云南省教育厅重点项目(2011Z035)和国家高技术研究发展计划项目(2011AA100504)资助. （50879073,51109102,51009073）
