控释氮肥对小麦旗叶氮素积累动态及产量的影响OA

This study aimed to explore the effects of controlled-release nitrogen fertilizer on nitrogen utilization and yield-related traits of different wheat materials,providing a scientific basis for optimizing slow-release fertilization strategies and ensuring stable and increased wheat yields.The results showed that under controlled-release nitrogen fertilizer treat-ment,the nitrogen content in the flag leaves of wheat increased first and then decreased from the booting stage to the maturity stage,and the nitrogen content in the flag leaves of some materials was significantly higher than that in the control group.The increase of nitrogen accumulation in flag leaves from the booting stage to the flowering stage under the controlled-release nitrogen fertilizer treatment was significantly higher than that in the control group,while the decreases from the flowering stage to the filling stage and from the flowering stage to the maturity stage were significantly lower than those in the control group.Among the seven tested wheat materials,the harvest index and nitrogen harvest index of Ningmai 42 were significantly increased,while the yield of Ning 16315 was significantly decreased.Analysis of variance showed that the total nitrogen content in wheat flag leaves at maturity was significantly affected by nitrogen application patterns,wheat variety(line),and their interaction,and the harvest index and yield were mainly regulated by the variety(line).The results of this study revealed that the effects of controlled-release nitrogen fertilizer on wheat nitrogen utilization and yield varied among varieties.Therefore,in the optimization of controlled-release nitrogen fertilizer application,it is necessary to comprehensively consider the genetic characteristics of varieties and their interaction effects with fertilization measures.