在化肥总养分减量18%的前提下，比较2种不同缓释肥在新垦水田水稻上的应用效果。结果表明，在新垦水田上施用缓控释肥对水稻产量影响不大，但可大幅提升化肥偏生产力，化肥减量效果明显。与常规施肥（施用45%三元复合肥）相比，施用缓释肥可增加水稻生长前期叶绿素含量，增加每穗实粒数，提高千粒重，弥补了有效穗数的不足，达到稳产的目标。相比较而言，有机缓释肥的施用效果较掺混肥料要好，较常规施肥增产1.1%、增效350.4元/hm²、化肥偏生产力提升23.2%。建议可将“好乐耕”有机缓释肥作为余杭地区主要水稻缓控释肥品种之一推广应用。

Under the reduction of 18% total chemical fertilizer, the effects of two different controlled-release fertilizers on the growth and yield of rice grew in newly cultivated paddy field were studied. The results showed that application of controlled-release fertilizer could significantly reduce the amount of chemical fertilizer without affecting the yield, and increase the partial productivity of fertilizers. Compared with conventional fertilizer, controlled-release fertilizers increased leaf chlorophyll value in the early stage of rice growth, and increased the number of grains per panicle and grain weight to make up for the lack of effective panicles. In the two controlled-release fertilizers, the effect of organic controlled-release fertilizer was better, its yield, efficiency and partial productivity of fertilizer were increased by 1.1%, 350.4 yuan/hm², and 23.2% compared with conventional fertilizer, respectively. It is suggested that “Holegeng” organic slow-release fertilizer can be popularized and applied as one of the main rice slow-release fertilizer in Yuhang district.