不同穗肥施用时间对玉米产量及经济性状的影响  

Effect of Different Earing Fertilizer Application Time on Maize Yield and Economic Traits

作　　者：俞洪燕[1] 钱晓刚[2] 

机构地区：[1]贵州师范学院地理与旅游学院,贵州贵阳550018 [2]贵州大学农学院

出　　处：《耕作与栽培》2013年第4期10-11,17,共3页Tillage and Cultivation

基　　金：贵州省农业科技重大项目;2009~2011年项目编号:NZ字【2009】3008

摘　　要：为确定穗肥最佳施用时期,通过不同时期施肥试验,研究了不同穗肥施用时间对玉米经济性状及产量的影响。结果表明:不同施肥时间对各个经济性状影响程度不一致,依次为:穗粒数>行粒数>穗行数>千粒重>穗长>穗粗>秃尖长度。各处理间产量差异显著,不同施氮时间对产量大小的影响表现为12叶全展>11叶全展>13叶全展。以12叶全展期施氮效果最佳。In order to definite the fertilization time for maize large bell stage, effect of different applicaton time on maize eco- nomic traits and yield were tested. The results showed that different fertilization time on the impact of various economic traits was different, its trends number per ear.gain number per row〉row number per ear〉1000 -- grain weight〉ear length〉ear diameter〉ear tip--barren length. Yield of different treatments showed significantly difference, different nitrogen fertilizer ap- plication time on yield was fully expand 12th leaf〉fully expand 1th leaf〉fully expand 13th leaf. The best time to maize fertilizer is fully expand 12th leaf.

关 键 词：玉米 氮肥 施肥时间 

分 类 号：S513[农业科学—作物学]