单位面积穗数、穗实粒数 千粒重是水稻产量的直接构成因素,它们对产量贡献的大小问题引起了育种、栽培工作者的高度重视。在常规稻方面,以往有过不少研究,一般认为穗数是最活跃的因素,穗数的多少直接影响着产量的高低。但是,面积发展越来越大的杂交稻,其穗粒结构作用于产量与常规稻有何区别,目前尚少定量上的分析,为 Spikes per unit area, spikelets grain weight of 1000 grain weight is a direct component of rice production, their contribution to the size of the crop caused by breeding, cultivation workers attach great importance. In conventional rice, there have been many studies in the past, generally considered the number of spikes is the most active factor, the number of spikes directly affect the level of production. However, the growing area of ​​hybrid rice, the grain structure of its role in the output of conventional rice and what is the difference, there is still little quantitative analysis of