The study looked at how applying nitrogen, phosphorus, and potassium fertilizers at different stages affects the growth, yield, and quality of maize. They found that applying nitrogen fertilizer at specific stages had a bigger impact on maize than phosphorus and potassium fertilizers. The best results were seen when mature, phosphorus, and potassium fertilizers were applied as a base, and nitrogen was split between seedling and ear stages. This method resulted in the highest yield and higher levels of protein, fat, and lysine in the maize. Another effective method was applying potassium as a base, nitrogen split between base, seedling, and ear stages, and phosphorus split between base and seedling stages, resulting in the highest levels of starch, sugar, and lysine in the maize.