摘要
以扬油6号和苏油211为材料，设置不同种植密度和氮素水平，通过测定成熟期各器官干重，研究不同种植密度和不同施氮条件对稻茬直播油菜产量及其构成的影响。结果表明：在该研究条件下，施氮量为225～315kg／hm2时，适宜种植密度为30．0万～37．5万hm2。施氮量与子粒产量呈二次曲线关系，达到最高产量的施氮量为278kg／hm2。
Taking Yangyou No. 6 and Suyou No. 211 （ Brassica napus L. ） as material, the effects of density and nitrogen tertilizer on yield formation of direct-sowing rapeseed in paddy rice field under different density and nitrogen application levels were studied through measuring dry weight in various organ at maturity stage. The main results were as follows： The optimum density of direct sowing rapeseed in paddy rice field was 33.7 × 10^4 plants/hm2. The appropriate density range was 30.0 × 10^4 - 37.5 × 10^4 plants/hm2. The seed yield was increased first and then decreased with the increasing of nitrogen application amount. The nitrogen application amount of maximum seed yield was 278 kg/hm2 respectively.
出处
《安徽农业科学》
CAS
2014年第5期1319-1320,1334,共3页
Journal of Anhui Agricultural Sciences
基金
国家科技支撑计划项目(2010BAD01B01)
江苏省农机三项工程项目(NJ2009-42)
江苏省农业三项工程项目(sx[2011])
关键词
关键词稻茬直播油菜
氮肥
种植密度
子粒产量
Direct sowing rapeseed in paddy rice field
Nitrogen
Density
Seed yield
