摘要
通过研究不同种植密度和不同施氮水平对春玉米产量及物质生产的影响,结果表明:在中高密度下,产量的实现主要是通过收获穗数实现的,穗粒数是影响产量的主要因素;氮素不足及过量可使败育发生,秃尖增大;适量施氮(220 kg/hm2),可促进子粒发育,增加穗粒数,提高产量。
Effect of different planting density and nitrogen application on spring corn yield and biomass production was studied in the paper. Results indicated that under the middle-high density, the output realized mainlythrough the harvest ear of number, and grain number per ear was key factor affected the yield. Nitrogen insufficientand excessive caused the abortion occurrence and bald-tip ears increased. Seed development was promoted and thenumber of grains per ear increased at moderate nitrogen of 220 kg/hm^2, so the yield increased.
出处
《吉林农业科学》
2015年第5期6-9,20,共5页
Journal of Jilin Agricultural Sciences
基金
吉林省科技支撑重大项目(20106025
2012602)
公益性行业科研专项(201203030-04-04
201303126-4)
关键词
密度
氮肥
产量
Planting density
Nitrogen
Yield
