控释尿素施用对水稻吸氮量及产量的影响

Effect of Controlled-release Urea Application on N Uptake and Rice Yield

以15N标记尿素及用其制成的有机-矿质材料控释尿素为供试肥料,探讨其在黑土水稻田上使用后水稻对N的吸收利用及水稻产量的变化。结果表明:控释尿素比普通尿素氮肥利用率提高了3.64%～19.92%,土壤中N的残留量增加6.37%～20.86%,可提高水稻产量8.66%～25.70%。

Using 15N-urea and the controlled release 15N-urea coated with organic-mineral materials as vested fertilizers,we investigated the effect of controlled release urea application on the N uptake and rice yield grown in the paddy field of chernozem. The results showed that the controlled release urea could increase urea-15N efficiency by 3.6419.92%,the soil residual N of urea-15N by 6.3720.86%, and the rice yield by 8.6625.70% as compared to urea.