为充分挖掘超级杂交稻金优785的产量潜力,在2008-2013年试验示范的基础上,对金优785在区域试验和超高产示范中的产量及其产量构成因子进行分析.结果表明:金优785产量构成因素中单位面积穗数的对产量贡献最大(PC=0.665 1),其次是穗粒数(PC=0.505 8),千粒重对产量贡献最小(PC=0.027 1);超高产示范的单位面积穗数和结实率极显著高于区域试验.金优785产量潜力大,具有超高产能力,实现超高产的主要途径为提高穗数,在足够穗数前提下,主攻大穗,在此基础上提高结实率.
To fully exploit the yield potential of super hybrid rice Jinyou 785,on the basis of test demonstration during 2008-2013,yield and yield components of Jinyou 785 were analyzed in regional test and super-high yield demonstration.Results:Per unit ear number contributed the most to yield (PC=0.665 1),followed by kernels per spike(PC=0.505 8),thousand kernel weight contributed the least to yield (PC =0.027 1);The per unit ear number and seed setting rate in super-high yield demonstration were extremely significantly higher than that in regional test.Jinyou 785 is of great yield potential and super-high yield ability,the main way to achieve super-high yield is enhancing the ear number,under the premise of this,increasing the number of large ears,and improving the seed setting rate.