大棚蔬菜补充CO_2后,植株健壮,叶片增大,光合效率高,增产幅度大。据试验,大棚黄瓜从移栽后第二天起,连续补充CO_246天,可使大棚内CO_2浓度增加到0.04～0.05%,黄瓜叶片上的气孔数显著增加,植株浓绿,提早开花,雌花数和叶结果数也明显增多,增产36%以上,并能提前10天上市。番茄在出苗后的12～15天内和移栽后的40～43天内补充CO_2,使CO_2浓度保持在0.1%左右,幼苗和植株生长健壮,提 Greenhouse vegetables supplemented with CO_2, robust plants, leaves increased, photosynthetic efficiency, yield a large margin. According to the experiment, the greenhouse cucumber from the next day after transplanting, continuous supplement CO_246 days, the greenhouse CO 2 concentration can be increased to 0.04 to 0.05%, the number of cucumber leaves stomata significantly increased, dark green plants, early flowering, female flowers And the number of leaf results also increased significantly, an increase of 36%, and can be listed 10 days in advance. Tomato was replenished with CO 2 within 12-15 days after emergence and 40-43 days after transplanting, keeping CO 2 concentration at about 0.1%, and the seedlings and plants grew robustly