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采用大区对比法对窄畦窄行穴播大豆各生育阶段群体生理指标及冠层光分布特点进行了分析。结果表明：与传统的宽畦宽行穴播相比，窄畦窄行穴播大豆群体ＬＡＩ高，叶片功能期长，相对光强高；在鼓粒期（Ｒ５），降低了叶片密集点所处的高度，减小了叶片密集度和消光系数，改善了整个冠层的光照条件，提高了净光合生产率，积累了更多的干物质，从而使籽粒产量提高了１７．８％。
Using the method of large area contrast, the physiological characteristics and the light distribution characteristics of canopy in different growth stages of narrow 畦 narrow-row sowing soybean were analyzed. The results showed that compared with the conventional broad-leaved broad-leaved sowing, the LAI of narrow-sowing narrow-sowing row-sowing soybean was high, the leaf function was long, and the relative light intensity was high. During the dooting stage (R5), the leaf- The height, the leaf density and the extinction coefficient were reduced, the illumination condition of the whole canopy was improved, the net photosynthetic productivity was increased and more dry matter was accumulated, which increased the grain yield by 17.8%.