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二氧化碳是作物进行光合作用的主要原料。在一定范围内,植物的光合作用与二氧化碳浓度呈正相关。据测定,蔬菜进行光合作用最适宜的二氧化碳浓度为1000PPm,而空气中的二氧化碳浓度只有300PPm,大棚相对密闭,二氧化碳浓度就更低。有试验表明,如果将大棚内二氧化碳的浓度增加到1000PPm,黄瓜增产12％,芹菜增产52％,番茄增产30％。那么如何增加大棚内二氧化碳的浓度呢?,在生产中可采用如下方法:
Carbon dioxide is the main source of crop photosynthesis. Within a certain range, plant photosynthesis and carbon dioxide concentration was positively correlated. It is determined that the most suitable photosynthesis of vegetables for the carbon dioxide concentration of 1000PPm, while the concentration of carbon dioxide in the air is only 300PPm, relatively confined greenhouse, carbon dioxide concentration is even lower. Some experiments show that if the concentration of carbon dioxide in the greenhouse increased to 1000PPm, cucumber yield 12%, celery yield 52%, tomato yield 30%. So how to increase the concentration of carbon dioxide in the greenhouse ?, In the production can be used as follows: