Urea+nitrification inhibitor DMPP(Entec46),Urea+nitrification inhibitor DCD(U+DCD) and organic-inorganic fertilizer(OIF) decreased significantly nitrate content of rape.

• 尿素+硝化抑制剂DM PP(En tec46)、尿素+硝化抑制剂DCD(U+DCD)和有机无机复混肥(O IF)3种氮肥显著降低了油菜硝酸盐含量。