分别在75000,90000,105000株hm-2种植密度下,研究了密度与种植方式对夏玉米郑单958冠层结构指标的影响.结果表明,随着种植密度的增加,展开叶叶面积指数,穗位叶叶绿素含量呈单峰曲线变化,散射辐射透过系数减小,群体消光系数在天顶角7.5°～67.5°内表现为增大的趋势；在同一密度下,宽窄行双株种植具有中后期衰老慢的优势,高密度下等行距双株具有较大的平均叶簇倾角,达到56.72°,叶片挺立.%With different plant population densities (7.5 × 104,9.0 × 104,l. 05 × 105 plant · hm-2) , the effects of the density and planting patterns on canopy architecture were studied in this article. The results show that with the increase of planting density, LAI of extended leaves, chlorophyll content of ear leaf showed a single peak curve. Transmission coefficient for diffuse penetration declined with the increase of population. From 7. 5° to 67. 5° ,the extinction coefficient tended to grow with the increase of zenith angle. It is more conductive density for leaves to avoid the loss of light, and increase the rate of photosynthesis. At high population uniform lines and double plants had a larger leaf angle of 56.72°.
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