控失尿素不同施用方式对水稻产量、品质及氮肥利用率的影响

Effects of Different Application Methods of Lost Control Urea on Yield,Quality and Nitrogen Use Efficiency in Rice

采用大田试验,研究控失尿素减施或与常规尿素配施对水稻产量、品质及氮肥利用率的影响.结果显示,与常规尿素相比,控失尿素常量或与常规尿素配施均可显著增加水稻产量,且控失尿素与常规尿素以1∶3质量比配合施用效果最好,可增加有效穗数,增产幅度为3.86%;其次是控失尿素与常规尿素以1∶1质量比处理,控失尿素减施15%处理水稻不减产.控失尿素和常规尿素配施还可在一定程度上提高水稻的蒸煮品质和营养品质,但不同配比间差异不显著.控失尿素常量或与常规尿素配合施用还能显著提高水稻氮肥利用率,且以控失尿素与常规尿素以1∶3的质量比配合施用效果为最好.

Field experiments were conducted to study the effects of reducing application of lost control urea or its combined application with conventional urea on yield,quality and nitrogen use efficiency in rice(Oryza sativa L.).The results showed that the application of lost control urea at traditional amount or its combined application with conventional urea significantly increased rice yield compared with the conventional urea,and the treatment of the1∶3ratio of loss control urea to conventional urea had the best effects,with the increasing extent of3.86%,which was primarily attributed to the increase of panicle number.The next was the treatment of the1∶1ratio of loss control urea to conventional urea.Reducing15%application of lost control urea didn’t decrease rice yield.The combined application of lost control urea and conventional urea improved the cooking quality and nutritional quality of rice to varying degrees,but there were no significant differences among different combined applications treatments.The combined application of lost control urea and conventional urea also significantly raised nitrogen use efficiency of rice,and the treatment of the1∶3ratio of loss control urea to conventional urea had the best effects.