Abstract:In order to clarify the effect of fertilization methods on Maize nitrogen utilization under straw returning, field experiments were conducted to study the effects of straw returning combined with different fertilization methods on maize yield, nitrogen utilization rate and soil properties, with four treatments: no nitrogen fertilizer control, conventional fertilization, straw returning + conventional fertilization and straw returning + layered fertilization. The results showed that compared with conventional fertilization, straw returning treatment significantly increased the yield of corn, and the effect of straw returning combined with layered fertilization was better. In 2020, the yield of corn increased by 17.68%, and the yield of this treatment increased by 4.65% compared with straw returning combined with conventional fertilization. Straw returning treatment significantly increased the nitrogen absorption of corn, especially with the increase of straw returning time. Straw returning treatment significantly increased the contents of soil organic matter, total nitrogen and available potassium, but there was no significant difference between layered fertilization and conventional fertilization, and had little effect on the contents of soil total phosphorus, total potassium, alkali hydrolyzable nitrogen and available phosphorus. It can be seen that straw returning + layered fertilization is conducive to the absorption and utilization of nitrogen in maize and improve yield.