超级稻产量构成因素与产量的关系研究

对天优10号、天优122、五丰优128、两优培九和玉香油占等5个超级稻品种(组合)在广州地区早、晚季的产量构成因素与产量的关系进行研究,结果表明:杂交稻与常规稻的产量构成因素存在明显差异,杂交稻有效穗数较多、千粒重较大,常规稻则每穗总粒数较多、结实率较高;此外,超级稻早季每穗总粒数和晚季千粒重对产量有最大的正直接效应,因此早季重点增加每穗粒数、晚季注重提高粒重是增加超级稻产量的有效途径。

Study on the relationship between yield components and yield of super rice

5 kinds of super rice cultivars and combinations Tianyou10,Tianyou122,Wufengyou128,Liangyoupeijiu and Yuxiangyouzhan were chosen to study the relationships between yield components and yield in the early and late crop in Guangzhou.The results show that: 1) There are obvious differences from the yield components between the hybrid rice and convention rice,as the hybrid rice has more panicles and higher 1000-grain weight but the convention has more total spikelets per panicle and higher filling coefficient;2) The components that total spikelets per panicle and 1000-grains weight have the biggest positive direct effect on the yield in the early and late crop respectively,so increasing the total spikelets per panicle in the early crop or enhancing the single grain weight in the late crop would be the effective way to attain high-yielding.