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在大棚蔬菜生产中,当棚内CO_2浓度因作物光合作用吸收而降至自然环境浓度300ppm以下甚至只有20ppm～30ppm时,就必须弥补棚内CO_2的浓度,以保证作物增加产量和改善品质.最初,以燃放烟雾法来补施CO_2气肥,因不安全和会产生有害气体,尔后又采用在大棚内安置器皿,用酸盐反应产气.这种方法虽避免了出现重大火灾事故的可能,但所用的硫酸具有腐蚀性,且反应激烈时还会出现飞溅、溢出现象,也可能对人和衣物造成一定损害及物料浪费.于是又出现了用专门器械设备制备出CO_2引入大棚喷施的方法,但其设备昂贵,只适用于平坦大片农场的大棚使用,对于地形复杂、分块零散及经营规模不大的南方来说,就显得成本过
In the greenhouse vegetable production, when the shed CO2 concentration due to crop photosynthesis absorption down to the natural environment concentration of 300ppm or even only 20ppm ~ 30ppm, we must make up for greenhouse CO 2 concentration to ensure the crop to increase yield and improve quality. , To release the smog method to supplement the CO 2 gas fertilizer, due to unsafe and will produce harmful gases, and later placed in the greenhouse with containers, with the reaction of gas production of gas. Although this approach avoids the possibility of a major fire accident, However, the sulfuric acid used is corrosive, and when the reaction is intense, splashing and spilling may occur, which may cause some damage to human and clothing as well as material waste, so that a method for spraying CO 2 into a greenhouse by using special equipment and equipment has also emerged , But its equipment is expensive and is only suitable for the use of greenhouses in large and flat farms. For the south where the terrain is complex, fragmented and the scale of operation is not large, it seems costly