中文摘要：

大豆冠层截获的太阳辐射强度是决定大豆生长发育和产量的重要环境因素。通过对蛋白质、脂肪含量不同的三个大豆品种在生殖生长期进行光处理,研究田间条件下,群体光富集和遮阴对大豆干物质分配、产量及品质的影响。结果表明：与自然光照相比,光富集后大豆积累的光合产物更多地分配到库;而遮阴后大豆积累的光合产物更多地分配给了源。光富集显著增加大豆单株产量、荚数和粒数,不同品种（系）单株产量增加幅度为27.7%-71.7%、单株荚数增加幅度为33.3%-71.1%、单株粒数增加幅度为35.5%-85.7%;遮阴显著减少大豆单株产量、荚数和粒数,不同品种（系）单株产量降低幅度为34.4%-49.7%、单株荚数降低幅度为43.0%-47.7%、单株粒数降低幅度为33.4%-52.6%。生殖生长期光富集有增加籽粒蛋白质含量和降低籽粒脂肪含量的趋势,而遮阴有降低籽粒内蛋白质含量和增加籽粒脂肪含量的趋势,品种间有一定差异。

英文摘要：

Light intensity intercepted by soybean canopy during the reproductive period is an important environmental factor determining soybean growth and yield.Responses of dry matter distribution,yield and quality of three soybean genotypes differing in protein and oil content to light enrichment and shading were investigated.The results showed that more dry matter was distributed to sink under whole plant light enriched conditions,while more dry matter was distributed to source under shading.Light enrichment increased seed yield,pod number and seed number per plant from 27.7% to 71.7%,33.3% to 71.1% and 35.5% to 85.7% respectively.In contrast,shade decreased seed yield,pod number and seed number per plant from 34.4% to 49.7%,43.0 to 47.7% and 33.4% to 52.6% respectively.Light enrichment increased protein content and decreased oil content in seed,however,shade decreased protein content but increased oil content in seed respectively.Differences existed among cultivars.