摘要
2002～2004年采用邢抗6号为材料,进行了夏玉米追氮量和施用比例的研究。结果表明:播种后第45天追纯N量150～337.5kg/hm2的范围内产量差异不显著,最大效益的追纯N量为225kg/hm2;在拔节期和大喇叭口期氮肥分次施用较大喇叭口期一次施用增产极显著,追施比例以4∶6最佳,纯N追施量在157.5～315kg/hm2的范围内产量差异不显著,最大效益纯N追施量为210kg/hm2;氮肥追施量与施用比例互作效应不显著。
Experiments of N fertilizer applied rate and its ratio on summer maize Xingkang No.6 were conducted among 2002 - 2004. There is no significant yield difference between N fertilizer rates from 150 kg/ha to 337.5 kg/ha applied at 45th day after sowing. The highest economy benefit was obtained at 225 kg/ha of N fertilizer rate. Yield of N fertilizer applied at both elongation stage and booting stage was significant higher than the yield of N fertilizer applied only at booting stage. The optimal ratio of N fertilizer applied at those two stages was 4 ： 6, at which there was no significant yield difference between N fertilizer applied rates from 157.5 kg/ha to 315 kg/ha. The highest economy benefits was obtained at 210 kg/ha of N fertilizer rate. There was no interacting between N fertilizer rate applied and its ratio at elongation stage and booting stage.
出处
《玉米科学》
CAS
CSCD
北大核心
2007年第3期122-126,共5页
Journal of Maize Sciences
基金
国家科技部农业转化资金(02EFN211300064)
河北省农业科技成果推广计划(01780123D)项目
关键词
夏玉米
氮肥
施用量
施用比例
Summer maize
N fertilizer
Rate applied
Application ratio
