包膜控释尿素对油菜产量和氮肥利用率的影响

[目的]为油菜合理施用氮肥提供理论依据。[方法]以油菜为试验材料,通过田间小区试验,研究了包膜控释尿素对油菜产量和氮肥利用率的影响。[结果]与施用普通尿素相比,施用包膜控释尿素可以在0.05水平显著提高油菜产量和氮肥利用率。施用树脂包膜控释尿素产量在0.01水平显著高于施用普通尿素;在等氮条件下,施用硫磺树脂包膜控释尿素产量在0.05水平显著高于施用普通尿素。树脂包膜控释尿素通过提高油菜产量构成因素中的千粒重和每角粒数来提高产量。与施用硫磺包膜控释尿素相比,施用树脂包膜控释尿素在0.05水平显著提高油菜氮肥利用率,减少氮肥用量30%,树脂包膜控释尿素氮肥利用率最高,在0.01水平显著高于其他处理。[结论]包膜控释尿素能显著提高油菜产量和氮肥利用率,为其推广应用提供科学依据。

Effect of Controlled-release Coated Urea on Rape Yield and Apparent N Recovery Rates

[Objective]The research aimed to provide a theoretical foundation for reasonable utilization of nitrogen fertilizer in rape field.[Method] Field plot experiment was conducted to investigate the effects of controlled-releases coated urea on rape yield and apparent N recovery rates.[Result] The application of controlled-release coated urea increased rape yield and apparent N recovery rates significantly compared with common urea.The yield of PCU was increased significantly.And with the equal content of nitrogen,the yield of SPCU was increased significantly compared with common wrea.PCU could improve the composition of rape including 1000-grain weight and seed number per pod.PSU could improve apparent N recovery rates significantly compared with SPCU.Apparent N recovery rates was increased significantly by the applying of PCU as base fertilizer.[Conclusion]Controlled-release coated urea could increase rape yield and apparent N recovery rates,which provided a theoretical foundation for the application and promotion of controlled-release coated urea.