不同产量水平杂交稻产量构成因素的分析

 以汕优63和两优培九作对照，18个株叶形态较好的大穗型两系杂交稻组合作为试验材料，研究分析了产量构成因素与产量的关系。结果表明：(1）不同产量水平大穗型组合产量的差异主要受单株穗数差异的影响；(2）产量构成因素对产量的作用大小依次为：单株穗数 >每穗实粒数>千粒重>每穗总粒数>充实度>结实率；(3）单株穗数和每穗实粒数与产量正相关达极显著水平，结实率与产量正相关达显著水平；(4）单株穗数、千粒重和充实度与产量的偏相关为正，且达到极显著水平，说明在大穗的基础上，单株穗数的增加、千粒重和充实度的提高可以使产量显著增加。

A Study on Yield Components of Hybrid Rice with Big Panicle

With two high-yielding hybrid rice combinations Shanyou 63 and Liangyoupeijiu as check,18 combinations with big panicle are chosen to study the relationships between yield components and yield.The results showed that:(1) A very significant increase in grain weight per plant(GWPP) of Super high-yielding combinations mainly results from more panicles per plant(PPP).(2) The order of contribution to GWPP was panicles per plant,filled grains per panicle(FGPP),1000-grain weight(KGW),spikelets per panicle(SPP),plumping degree(PD) filled grain rate(FGR).(3) GWPP has positive correlation with PPP and FGPP at 0.01significant level,with FGR at 0.05 significant level.(4)On the background of big panicle hybrid rice GWPP has positive partial correlation with PPP,KGW and PD at 0.01 significant level,which means any increase in these yield components can increase yield.