研究了氮磷钾肥的施用对杂交水稻广两优476生长性状及产量构成因子的影响。结果表明氮对广两优476的分蘖能力影响十分明显,尤其在前期生长,对株高的影响则表现在中后期;磷对分蘖有促进作用,但对株高影响并不明显;施钾能明显促进分蘖和增加株高,但与施钾水平没有直接关系。在产量构成因子方面,氮和钾的影响比磷要大,主要是通过影响有效穗数和结实率来影响产量。适宜的施肥量为N 120～240、P2O5 60～90、K2O 105～150 kg/hm2。 The effects of NPK fertilization on the growth traits and yield components of hybrid rice variety “Guangliangyou 476” were studied. The results showed that the effect of nitrogen on the tillering ability of Guangliangyou 476 was obvious, especially in the early stage. The effect on plant height was in the middle and late stages. Phosphorus had a positive effect on tillering but had no obvious effect on plant height. Significantly promote tillering and increase plant height, but with no direct relationship with the application of potassium. In terms of yield components, the impact of nitrogen and potassium is greater than that of phosphorus, mainly affecting the yield by affecting the effective spike number and seed setting rate. The suitable fertilization amount is N 120 ~ 240, P2O5 60 ~ 90, K2O 105 ~ 150 kg / hm2.