CO_2浓度倍增对大豆影响的试验研究

An Experiment Study of the Impacts of CO_2 Concentration Doubling on Soybean Growth

本文利用ＯＴＣ—１型开顶式气室研究了ＣＯ２浓度倍增对大豆的影响，结果表明：ＣＯ２浓度增加使大豆成熟期提前，株高增加；根瘤数量、干物重和单个根瘤的重量增加；叶片厚度、干物重及单位面积的叶片重量增加；总生物量、籽粒数量、籽粒产量和百粒重明显增加；光合作用速率和气孔阻力增加，蒸腾速率减小；粗蛋白含量减少，粗脂肪、饱和脂肪酸和不饱和脂肪酸增加。

In this paper, the impacts of CO2 concentration doubling on soybean growth are studied using OTC-1 open top chamber.The results show that ambient CO2 concentration doubling brings out early maturity stage and increases the height; the numbers and dry weight of the root nodule increase.The thickness and dry weight of the leaves increase. The total biomass, grain numbers, grain yield and 100-grain weight increase remarkably. The photosynthesis rate and stoma resistance increase, and transpiration rate decreases. The contents of proteins would decrease. The fat, saturated fatty acid and unsaturated fatty acid increase.