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普通尿素与包膜尿素掺混施用能提高水稻产量,50%普通尿素掺混50%包膜尿素在水稻上施用产量最高。水稻产量增加主要是通过增加亩穗数形成的。50%普通尿素掺混50%包膜尿素施用的水稻氮肥利用率最高。包膜尿素和普通尿素掺混施用可以促进生育早期和中期养分均衡释放,保证水稻最重要的生育前期和中期养分均衡供给,从而提高氮肥利用率,进而提高水稻产量。
The application of common urea and coated urea can increase the yield of rice, and 50% of ordinary urea mixed with 50% coated urea has the highest yield on rice. The increase of rice yield is mainly formed by increasing the number of ears per mu. The nitrogen utilization efficiency of rice with 50% urea mixed with 50% coated urea was the highest. Co-application of coated urea and ordinary urea can promote the balanced release of nutrients in the early and middle stages of fertility and ensure the balanced supply of nutrients at the most important pre-stage and mid-stage of rice so as to increase the utilization rate of nitrogen fertilizer and further increase the yield of rice.