以三系杂交糯稻嘉糯Ⅰ优721为试验材料,研究了不同栽插密度下的分蘖动态变化及成穗规律,分析了穗粒结构特点及其对水稻产量的影响,结果表明,栽插密度为22.5万穴/hm~2时最高茎蘖数适宜,成穗率最高,较好地协调个体和群体之间的关系,能充分发挥该品种的高产潜力。 Three-line hybrid glutinous rice Jiayou Ⅰyou 721 was used as experimental material to study the dynamic changes of tillering and ear formation under different planting density. The characteristics of grain structure and its effect on rice yield were analyzed. The results showed that planting density The optimum number of tillers at 225,000 hm ~ 2 was the highest, and the spike rate was the highest, which could well coordinate the relationship between individuals and groups and give full play to the high yield potential of this variety.