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一般情况下,空气中 CO_2 的含量仅 0.4％。国内外研究表明,蔬菜为进行光合作用所需要的适宜浓度为1000-2000ppm。在阳光充足的晴天,CO_2浓度高,光合作用强烈,积累养分愈丰富,蔬菜产量愈高。空气中的自然浓度使植物一直处在半饥饿状态,如果 CO_2浓度下降到 50ppm,光合作用就会停止进行。因此,在大棚内增施CO_2气肥不失为一个重要的增产措施。 根据上述原理,我们于 1997年春末在坊前镇农副业总公司直属蔬菜场的钢架大棚内首次对番茄、茄子进行增施 CO_2 气肥试验。番茄和茄子各设 3个
Under normal circumstances, the content of CO 2 in the air is only 0.4%. Domestic and foreign studies have shown that the appropriate concentration of vegetables for photosynthesis 1000-2000ppm. In sunny sunny days, CO 2 concentration is high, photosynthesis is strong, the more accumulated nutrients, the higher the yield of vegetables. The natural concentration in the air leaves the plant in a semi-starved state, and photosynthesis ceases if the CO 2 concentration drops to 50 ppm. Therefore, it is an important stimulation measure to add CO 2 gas fertilizer in the greenhouse. According to the above principle, we first carried out the experiment of adding CO 2 gas fertilizer to tomato and eggplant in the steel shed in the vegetable field directly under the Agricultural and Sideline Parent Company of Fangqian Town in the late spring of 1997. 3 for tomato and eggplant