The following principles should be followed when applying carbon dioxide gas fertilizer to fruits and vegetables in greenhouses.
　　 1. Fertilization period: Fruits and vegetables should be in the fruit expansion period, and leaf vegetables should be applied after planting and slowing down the seedlings.
　　 2, fertilization time: raising the sun or pull Lianhou administered beginning one hour, one hour before the end of the leaked, afternoon, evening, when not leaked; sunny day when sufficient light is released, a temperature above 15 ℃, cloudy, the It is not used when snow is below 15 °C.
　　 3. Volatile gases due to sulfuric acid and ammonium bicarbonate are harmful to crops , so they should be placed in the shed and then placed in the shed.
　　 4, add a little ammonium bicarbonate reaction residue, the concentration of income container field can be used when the basal dressing or greenhouse until no bubble generation can not be used as a dressing shed.
　　 5. The amount of sulfuric acid and ammonium bicarbonate should be added according to different vegetables.
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