ＣＯ２对４种果菜生长发育有显著影响。表现为叶片分化提前，叶面积扩大，干重增加，降低着果节位，提早座果，增加单株果数，提高营养成分。果实成熟分别提早：黄瓜９ｄ，番茄７ｄ，茄子６ｄ，甜椒８ｄ。产量增长分别为：黄瓜４４．４％，番茄３６．６％，茄子１７．１％，甜椒３０．８％，尤以早期产量增长最为显著，达２７．３％～７１．３％。果数增加是增产的主要因子。果实中维生素含量和碳水化合物积累增加，糖酸比提高 CO2 has a significant effect on the growth and development of 4 kinds of fruit and vegetables. The performance of early leaf differentiation, leaf area expansion, increase dry weight, reduce the fruit node, early fruit, increase the number of fruit per plant, improve the nutritional content. Earlier fruit maturity: cucumber 9d, tomato 7d, eggplant 6d, sweet pepper 8d. The yield growth was respectively 44.4% of cucumber, 36.6% of tomato, 17.1% of eggplant and 30.8% of sweet pepper, especially the early yield increased the most, reaching 27.3% -71.3%. Increasing the number of fruit is the main factor for increasing production. Fruit vitamins and carbohydrate accumulation increased, sugar to acid ratio increased