包膜尿素对油菜产量、品质及氮肥利用率的影响

Effect of Coated Urea on Yield,Quality and Nitrogen Using Efficiency of Rape

以油菜为试材,采用温室土培盆栽试验结合常规测试的方法,研究了不施氮、施用尿素和包膜尿素对油菜产量、品质及氮肥利用率的影响。结果表明:随着施氮肥量的增加,油菜产量呈显著增加趋势,和施用尿素相比,施用包膜尿素处理可显著提高油菜产量,并可以减少油菜的根冠比;相比尿素,施用包膜尿素显著降低了油菜硝酸盐含量,并可增加油菜的维生素C、可溶性蛋白质和可溶性糖含量;施包膜尿素较尿素还可提高油菜的氮肥偏生产力、氮肥农学效率和氮肥回收利用率,有效减少氮素损失。综上所述,包膜肥料可实现油菜节肥增产、改善品质、提高氮肥利用率的目的,有很好的推广应用前景。

Taking rape as test material,the effect of different treatments with the application of zero nitrogen（N）,urea and coated urea on yield,quality and N use efficiency of rape was studied by pot experiment in greenhouse,combined with normal determination.The results showed that yield of rape significantly increased with the increasement of N application rate,compared with urea,the application of coated urea significantly increased yield of rape,decreased root shoot ratio of rape.The application of coated urea could significantly decrease nitrate content of rape,and improve plant vitamin C content,soluble sugar and protein content.Compared with urea,the application of coated urea could also increase partial factor productivity from applied N（PFP_N）,agronomic efficiency of applied N（AE_N）and apparent recovery efficiency of applied N（RE_N）of rape,and reduce N loss.In sum,coated urea was one kind of applied prospect fertilizer that could increase yield with less fertilizer,improve quality and increase N use efficiency of rape.