以宁香粳9号为试验材料，于2022年在南京农业大学白马教学科研基地开展试验，研究覆膜机插缓混一次施肥对水稻生长、产量及氮肥吸收利用的影响，为绿色高产的稻作方式提供新的思路。结果表明，缓混肥一次基施（T1）、覆膜缓混肥一次基施（T2）和覆膜尿素两次施用（T3）处理的产量较常规施肥（CK）分别提高6.0%、9.1%和6.5%，但只有T2处理达到显著水平；T2处理植株干物质积累量较CK显著提高12.5%，在分蘖期、拔节期的叶面积指数较CK分别显著提高62.0%、26.7%；T2处理氮肥偏生产力和氮素农学利用率较CK显著提高9.1%和47.7%，氮素利用率较CK提高17.6%。可见，覆膜机插缓混一次施肥具有更高的水稻增产潜力和氮素利用效率。

An experiment was conducted in 2022 to study the effects of one-time fertilization technology for mechanized transplanting rice with biodegradable film mulching on growth, yield and nitrogen use efficiency of rice (Ningxiangjing 9), in order to providing new ideas for green and high-yield rice cultivation methods. The results showed that the yield of the one-time basal application of controlled-release blend fertilizer (T1), one-time basal application with biodegradable film mulching of controlled-release blend fertilizer (T2), and twice application with biodegradable film mulching of urea (T3) were increased by 6.0%, 9.1% and 6.5% compared with conventional fertilization (CK), respectively, but only T2 treatment reached a significant level. Compared with CK, the dry matter accumulation of T2 treatment was significantly increased by 12.5%. The LAI of T2 treatment at tillering stage and elongating stage were significantly higher than that of CK by 62.0% and 26.7%, respectively. Compared with CK, the NPP and NAE of T2 treatment were significantly increased by 9.1% and 47.7%, the NUE was increased by 17.6%. It can be seen that one-time fertilization technology for mechanized transplanting rice with biodegradable film had a higher yield potential and nitrogen use efficiency.