氮肥对夏玉米子粒不同部位重量的影响  

Nitrogen Effects on Upper and Middle Kernel Weight in Summer Maize

作　　者：魏亚萍 王璞[2] 

机构地区：[1]中央农业广播电视学校,北京100012 [2]中国农业大学农学与生物技术学院,北京100094

出　　处：《玉米科学》2006年第5期123-126,共4页Journal of Maize Sciences

基　　金：国家自然科学基金资助项目(30070451)

摘　　要：对玉米子粒不同部位进行划分,从粒位角度研究了不同氮肥用量和施用时期对夏玉米子粒中下部和上部重量的影响。结果表明,中下部子粒是单穗重量的主要构成部分。不同氮肥运筹对上部子粒重量的影响大于中下部子粒;增加上部子粒重量对提高单穗重量意义重大。在所有氮肥处理中,以基肥施氮45 kg/hm2+雌穗小花分化期施氮135 kg/hm2的单穗总重量最高。The kernel weight per kernel and per ear of upper and middle ear position were investigated under different rates and times of nitrogen application. The results showed that middle kernel weight per ear was the main part of the ear weight. Nitrogen supply had more obvious effects on the upper kernel weight than that of middle kernel. The upper kernels were very important to increase ear weight although they were only a small part of the ear. The treatment of nitrogen supply at sowing stage 45 kg/ha ＋ 135 kg/ha at 10 leaves stage obtained highest ear weight among all treatments.

关 键 词：夏玉米 氮肥 产量 

分 类 号：S513.062[农业科学—作物学]