摘要
采用田间试验研究氮肥后移对晚收夏玉米产量、氮素吸收分配和氮肥利用效率的影响。结果表明,氮肥后移使夏玉米产量和氮素积累量增加,在农民习惯收获和晚收条件下分别较正常施氮增产2.11%～2.91%和7.23%～9.52%。晚收较农民习惯收获增产2.12%～6.42%,氮积累量增加1.10%～3.18%;晚收夏玉米茎和子粒氮积累量增加,而叶和其他器官中积累量减少。氮肥后移提高了夏玉米氮肥利用率和农学效率,晚收条件下氮肥利用率提高了3.52%～6.87%,氮肥农学效率提高了0.82～1.60 kg/kg。氮肥按"30%苗肥+30%大喇叭口肥+40%吐丝肥"方式施用在晚收条件下产量和氮肥利用效率最高。
Field experiment was carried out to study the effects of postponing N application on yield and N absorption, allocation and N fertilizer utilization efficiency of summer maize in later harvest time. The results showed that postponing N fertilizer application could increase grain yield and N accumulation, increased yield by 2.11% - 2.91% in accustomed harvest time and 7.23% - 9.52% in later harvest time. Compared with accustomed harvest, later harvest＇s yield increased by 2.12% - 6.42%, N accumulation increased by 1.10% - 3.18%. The stem and grain N accu- mulation increased in later harvest time, while the leaves and other organs were reduced. Postponing N application increased apparent N recovery by 3.52% - 6.87% and N agronomic efficiency by 0.82 - 1.60 kg/kg in later harvest time. Based on results from this experiment, it was recommended that 30% of N fertilizer should be applied as seeding fertilizer, 30% should be applied as trumpeting stage and 40% should be applied as silking stage, the yield and N utilization efficiency were the highest in later harvest time.
出处
《玉米科学》
CAS
CSCD
北大核心
2011年第1期117-120,共4页
Journal of Maize Sciences
基金
国家玉米产业技术体系项目
中国-国际植物营养研究所合作项目(NMBF-HenanAU-2009)
关键词
夏玉米
氮肥
氮积累量
氮肥效率
Summer maize
N application
N accumulation
N fertilizer efficiency
