包膜控释尿素在湖北中稻上合理施用量的研究

在湖北省中稻上开展了控释尿素不同施用量的田间试验。研究结果表明,施用控释尿素不仅可以提高中稻产量,而且可以提高氮肥的农学效率及表观利用率,控释尿素70%的用量与普通尿素100%的用量效果相当,并随着控释尿素施用年限的增加,控释尿素施用效果越显著,控释尿素至少可以减少氮肥用量30%。

Study on the optimal application amount of coated and controlled release urea in Hubei middle-season rice

The field experiment is carried out in order to study the optimal application amount of coated and controlled release urea in middle-season rice in Hubei Province. The results show that： the yield of middle-season rice, agronomic efficiency and appearance utilization rate of nitrogen fertilizer are increased by applying controlled release urea; The effect of 70% nitrogen application amount of controlled release urea treatment is equaled to 100% nitrogen application amount common urea treatment, and the effect of controlled release urea is more significant with applying time lengthened, the nitrogen application amount could be decreased by 30% compared to common urea due to applying controlled release urea.