对中籼 898产量构成因素的分析表明 ,4个产量构成因素对产量贡献的大小依次为有效穗、每穗总粒数、结实率、千粒重。产量 9.0t/hm2 以上的合理穗粒结构为 :有效穗 (2 85± 15 )万 /hm2 ,每穗总粒数 (16 0± 10 )粒 ,结实率 (86± 2 ) % ,千粒重 2 9.5g。并提出高产栽培措施。 The analysis of the yield components of medium indica rice 898 showed that the contribution of the four yield components to the yield was in the order of effective panicle, total grain number per panicle, seed setting rate and 1000-grain weight. The rational grain structure with yield above 9.0 t / hm2 was: effective panicle (2 85 ± 15) per hectare, total grains per panicle (160 ± 10), seed setting rate (86 ± 2)%, g. And proposed high-yielding cultivation measures.