不同密度和氮肥对夏玉米驻玉309产量及物质生产的影响  

Effect of Different Density and N-application Rate on Summer Grain Yield and Dry Matter Productivity of Zhuyu309 Variety.

作　　者：王成业[1] 许波[1] 许海涛[1] 张海申[1] 王友华[1] 

机构地区：[1]河南省驻马店市农业科学研究所,463000

出　　处：《农业科技通讯》2008年第7期76-78,共3页

基　　金：河南驻马店市科技攻关项目(ZNK2001001)

摘　　要：通过不同种植密度和不同施氮水平对夏玉米驻玉309的产量及物质生产影响的研究,结果表明:在中(6.0万株/hm2)、高密度(7.5万株/hm2)下,氮肥对驻玉309单株物质生产能力的调控作用更明显,并主要是通过影响穗粒数来实现的。适量施氮,可促进顶部籽粒发育,减少败育,使秃尖缩短,增加穗粒数,增加产量。Eeffect of different density and n-application rate on summer grain yield And dry matter productivity of zhuyu 309 variety was studied. The results Showed that the effect of nitrogen on maize yield of individual plants, mainly acted through the regulation of kernel number, was 75000plants/hm^2.Appropriate nitrogen could improve of apical yield by reducing aborted kernels more evident in 60000plants/hm^2 and kernel,and increase kernel number and yield by reducing aborted kernels.

关 键 词：驻玉309 密度 氮肥 物质生产 

分 类 号：S513[农业科学—作物学] F014.1[经济管理—政治经济学]