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通过设置９～３６株／ｍ２１０个水平的栽插密度试验，探讨了群体密度对亚种间杂交稻Ⅱ优１６２生长发育与产量形成的影响，结果表明：有效穗数随着栽插密度的增大而增多，穗粒数则相反，产量（Ｙ）与栽插密度（Ｘ）满足Ｙ＝Ｘ３３０６＋５９８６×１０－６×Ｘ１．２２３７２６方程，产量在密度１２～３０株／ｍ２范围内差异不显著，说明亚种间杂交稻Ⅱ优１６２自我调节能力很强；单株分蘖数和成穗率随着群体增大而降低，达到最高苗的时期和有效分蘖终止期随栽插密度增大而提早；抽穗后干物质积累量和ＲＧＲ随密度增大而降低。
The effects of population density on the growth and yield formation of inter-subspecific hybrid rice “Ⅱ You 162” were studied by setting the transplanting density test at 9 ~ 36 plants / m2. The results showed that the number of effective panicles increased with planting density The yield and planting density (X) satisfy the Y = X3306 +5986 × 10-6 × X1.223726 equation, and the yield is in the range of 12 ~ 30 plants / m2 The difference was not significant, indicating that hybrid rice Ⅱ You 162 subsurface self-regulation ability is strong; tiller number per plant and spike rate as the population increased and decreased to reach the highest seedling stage and effective tillering termination with increasing transplanting density Big and early; dry matter accumulation and RGR decreased after heading.