1　研究背景高效农业的发展,使农作物的保护地栽培,特别是蔬菜的大棚和温室栽培,得到了快速发展。由于保护地栽培是封闭栽培,植物光合作用所需的ＣＯ2得不到补充,限制了保护地产量和效益的进一步提高。及时向棚室中补充ＣＯ2(俗称气肥),已成为保护地生产提高产量和效益的重要技 1 Research Background The development of efficient agriculture has enabled the rapid development of crop cultivation, especially in greenhouses and greenhouse cultivation of crops. As the protected cultivation is closed cultivation, the CO2 needed for photosynthesis of plants can not be supplemented, which limits the further improvement of the yield and benefits of protected areas. The timely addition of CO2 to the greenhouse (commonly known as gas fertilizer) has become an important technology for the production of protected areas to increase production and profits