摘要
采用田间试验研究了缓/控释氮肥和不同施氮次数对夏玉米氮代谢、氮素吸收及产量的影响。结果表明,施氮显著增加了穗位叶硝酸还原酶活性、游离氨基酸含量、叶绿素含量和氮素积累量,提高了百粒重,增产20.93%~27.04%。与习惯两次施氮相比,一次性施用缓/控释氮肥和＂苗肥30%＋大口肥30%＋吐丝肥40%＂三次施氮的灌浆期游离氨基酸含量分别高2.77 mg g-1和4.07 mg g-1,氮素积累量分别提高了4.18%和9.74%,氮肥利用率分别提高了2.95和6.88个百分点,产量分别增加了4.88%和5.05%,实现了夏玉米增产和高效施肥。
Field trial was used to study the effects of slow/controlled release N fertilizer and different frequency of N fertilization on N metabolism, N uptake and yield of summer maize. The results showed that the application of N fertilizer could significantly increase ear-leaf nitrate activities, free amino acid contents, chlorophyll contents and N accumulation. The application of N fertilizer improved the 100-grain weight and increased the 20.93% - 27.04% of yield. The best effect was the treatment of three-off application of N fertilizer of 30% fertilizer at seeding stage, 30% fertilizer at big trumpet stage and 40% fertilizer at silking stage prior to one-off application of slow/controlled release N fertilizer. Compared with the traditional two-off N fertilization, the free amino acid contents in these two treatments increased 4.07 mg g^-1 and 2.77 mg g^-1, fertilizer-nitrogen use efficiency increased 6.88% and 2.95%, the yield increased 5.05% and 4.88%, respectively. These treatments carried out high yield and benefit fertilization application of summer maize.
出处
《土壤通报》
CAS
CSCD
北大核心
2012年第1期147-150,共4页
Chinese Journal of Soil Science
基金
中国-国际植物营养研究所(IPNI)合作项目(NMBF-HenanAU-2009)
中国科学院知识创新工程重大项目-现代农业示范工程(30300157)资助
关键词
夏玉米
缓/控释氮肥
氮代谢
氮素积累
产量
Summer maize
Slow/controlled release N fertilizer
N metabolism
N accumulation
Yield
