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[目的]筛选出控释肥的最佳适宜用量,为缓控释肥在夏玉米上的应用提供理论依据。[方法]对长效控释肥在夏玉米播种时一次性基施,探讨不同用量的长效控释肥对玉米生长发育、产量、经济效益及环境的影响。[结果]除60%SRF1处理略有减产外,其余处理均表现不同程度的增产,增产率为1.1%~7.4%,部分处理的产量差异达到显著水平。[结论]在该试验条件下,综合考虑玉米产量、氮素利用效率和经济效益,采用普通施肥量的80%水平的控释肥一次施用,可以达到省工、高产、高效、节肥的目的,益于在华北平原夏玉米生产区推广应用。
[Objective] The optimum dosage of controlled release fertilizer was screened out to provide theoretical basis for the application of controlled release fertilizer on summer maize. [Method] The long-term controlled release fertilizer was applied once in summer maize sowing to investigate the effects of different dosage of long-acting controlled release fertilizer on the growth and development, yield, economic benefits and environment of maize. [Result] Except for the 60% SRF1 treatment, the yields of some treatments were slightly reduced. The yield of other treatments all increased by 1.1% ~ 7.4%, and the yield difference of some treatments reached a significant level. [Conclusion] Under the experimental conditions, considering the corn yield, nitrogen utilization efficiency and economic benefit, it could achieve the purpose of saving labor, high yield, high efficiency and fertilizer saving by using 80% level of controlled release fertilizer as common fertilizer , Benefit from the promotion of summer maize production area in North China Plain.