化学抑制型氮素释放延缓剂对玉米产量和品质的影响

Effects of the N Slow/Controlled Release Fertilizers on Yield and Nutritional Quality of Maize

以大、中、小3种穗型玉米品种为试材,研究脲酶抑制剂(NBPT)以及脲酶抑制剂与硝化抑制剂(DCD)组合(NBPT+DCD)对玉米单株产量和子粒营养品质的影响。结果表明,化学抑制型氮素释放延缓剂可增加玉米的成粒数,有效提高玉米子粒的蛋白质含量和淀粉含量。不同类型抑制剂对不同穗型玉米品种的影响不同。大穗型品种丹玉39的蛋白质含量对NBPT+DCD的反应敏感;中穗型品种郑单958的成粒数对两种抑制剂组合的反应敏感;而小穗型品种四单19对抑制剂的反应不敏感。因此,生产中应根据玉米品种不同选用适合的氮素释放延缓剂。

Effects of Urease/Nitrification inhibitor（NBPT, NBPT ＋ DCD） on yield and grain nutrition content were studied, using three types of maize, Danyu39 as large-size ear hybrid, Zhengdan958 as medium-size ear hybrid, and Sidan 19 as small-size ear hybrid. The results showed that N slow/controlled release fertilizers could increase grain numbers, improve grain protein and starch content. Each inhibitor had different effects on maize. Grain protein content of Danyu39 was sensitive to NBPT＋DCD, grain number of Zhengdan958 was sensitive to both of inhibitors. It was indicate that we should choose suitable N slow/controlled release fertilizers according to different ear size types of maize in production.