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中文摘要：
以垦丰16为试材,在30万株/hm^2、33万株/hm^2、36万株/hm^2和39万株/hm^24个密度条件下,研究不同密度对大豆光合特性和产量的影响。结果表明,叶面积指数和光合势随着密度的增加而增加,叶绿素含量和冠层光合速率随着密度的增加而降低。在一定密度范围内（M1～M3）,产量随着密度的增加而增加,M3产量最高达3815.22kg/hm^2,当密度增加到一定程度则产量开始下降。
英文摘要：
In order to investigate effects of different densities on soybean photosynthetic characteristic and yield,leaf area index,leaf area duration,content of chlorophyll,day photosynthetic rate and yield of Kenfeng 16 were studied under three density treatments（30,000plant/hm^2,33,000plant/hm^2,36,000plant/hm^2 and 39,000plant/hm^2）by randomized block design on a farm of Inner Mongolia University for Nationalities during 2007-2008.The results shows that leaf area index and leaf area duration increased with the increasing of density while content of chlorophyll and canopy photosynthetic rate decreased.Yield increased with the increasing of density during the M1～M3,and yield did not increase when it came to its top.Yield of M3 reached 3815.22 kg/hm^2,and the yield of M4 decreased.
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