不同施肥技术对防止玉米早衰及对产量的影响

Effects of Fertilization on Premature and Yield of Maize

通过田间试验的方法,研究了施肥对玉米叶片老化及产量的影响。结果表明:后期脱肥是玉米早衰的重要原因;合理的氮肥用量能够提高玉米产量,过量施用会降低玉米产量,合理用量为N16.1 kg/667m2,施肥遵循少量多次,基肥N用量为3.2 kg/667m2,拔节期与大喇叭口期追肥分别为9.6 kg/667m2和3.2 kg/667m2。本试验地施入锌肥对玉米的增产作用不明显。

Field trial was conducted to study the effects of fertilization on premature and yield of Maize. The results showed that one of the important reasons in maize premature was short of nutrition late in its growth period; Rational amount of fertilization could improve the yield of maize but overdose wound make the yield reduce, the optimal dose of N was 16.1kg/667m^2, and the amount of N in basal fertilizer was 3.2 kg/667m^2, 9.6kg/667m^2 in stem elongation stage, and 3.2 kg/667m^2 in bell-mouthed stage. Zinc fertilizer couldn＇ t improve distinctly the yield in this trial.