寒地水稻秕粒形成基础的研究 Ⅰ剪叶与剪穗对水稻小穗结实的影响

Studies on The Basis of Unfulfilled Grain of Rice plant in Cold Region Effect of Defoliate and Rachis-removing on Spikelets Filling

本文通过盆栽的方法对 19个水稻品种(系 )在花期进行剪叶与剪穗处理 ,结果表明减少库容对降低秕粒率的效果不如减源对增加秕粒率的效果大 ;剪库增加粒重 ,而剪源则降低粒重。品种间对剪源与剪库的反映不尽相同。

Through defoliation and rachis-removing at flowering stage to 19 rice genotypes, we found that the effect of lessening sink capacity on unfulfilled-grain ratio is lower than that of lessening source capacity. Rachis-removing could increase grain weight, while defoliation could lower grain weight. Genotypes have different responses to defolianion and rachis-removing.