寒地水稻秕粒形成基础的研究Ⅳ.寒地水稻不同类型品种(系)的产量构成与秕粒的关系

Studies on The Basis of Unfulfilled Grain of Rice Plant in Cold Region Ⅳ.The Relationship Between Yield Components of Different Cultivars(Lines) and Unfulfilled Grain

分析了黑龙江省生产中广泛使用的 2 1份水稻品种 (系 )的穗部特征及产量构成因素间的相互关系。结果表明 ,大穗型品种的结实率低于小穗型品种的结实率 ,中晚熟品种的结实率比中早熟品种的结实率低。

In this paper, the relationship between panicle feature of 21 cultivars(lines) widely used in Heilongjiang province and yield components was analyzed. The result showed that fulfilled grain percentage of heavy panicle cultivars was lower than that of light panicle ones and the fulfilled grain percentage of late ripened cultivars was lower than that of early ripened ones. The major cause of low fulfilled grain percentage is high percentage of the unfulfilled grain.