关键词: 水稻, 有效穗率, 产量

Abstract: The relationship between the effective panicle rate and yield formation of rice were analyzed in this study, two japonica varieties were used（Muxiang 1 and Mudanjiang 32） as materials. The results showed that there was a significant positive correlation between effective panicle rate and yield, the number of panicles per unit area was increased with the increase of the effective spike rate. The effective panicle rate had significant parabolic relation with the grain number per panicle. In order to achieve the highest yield of different rice varieties, we should improve the nitrogen fertilizer for multi-spike type cultivars, and appropriate planting density and fertilization for big panicle type varieties.

Key words: rice, effective panicle rate, yield