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在不同密度条件下对亚有限和无限型品种（品系）的ＬＡＩ、粒重及光照垂直分布进行了分析。结荚、鼓粒期的ＬＡＩ，亚有限型以上层、无限型以中层最高。开花期两种类型材料相对光照均以冠层上部最高，下部最低，但上部相对光强亚有限型低于无限型。成熟期粒重分布，亚有限材料以上层、无限型以中层比例最高，分别约占全株粒重的４５％～６０％和４５％～５７％。两种类型材料在２５株／ｍ２下均获得了较高产量。
The LAI, grain weight and light vertical distribution of sub-limited and infinite varieties (lines) under different densities were analyzed. Pod, drum grain period of LAI, sub-limited type to the top, the highest type in the middle. The anthesis of the two types of materials at flowering stage was the highest in the upper canopy and the lowest in the lower canopy, but the subliminal relative light intensity in the upper part was lower than the infinity type. In the mature stage, the distribution of grain weight is the highest among the sub-limited materials, and the infinity type is the highest among the middle layers, accounting for 45-60% and 45-57% of the whole plant weight, respectively. Both types of materials achieved higher yields at 25 plants / m2.