In winter production, color peppers have less insulation due to heat preservation and air release, greenhouses are closed, and indoor and outdoor air cannot convective. Because the color peppers perform photosynthesis, the concentration of carbon dioxide in greenhouses is significantly reduced, and photosynthesis is also reduced. Therefore, it is necessary to supplement the shortage of carbon dioxide concentration in the greenhouse by carbon dioxide fertilization and enhance the efficiency of photosynthesis.
The method of producing carbon dioxide by adding ammonium bicarbonate and dilute sulfuric acid is generally used: Put a plastic bucket every 40 to 50 square meters in a shed, and add 6 kg of water to each barrel to add 2 kg of industrial sulfuric acid. About 9:00 am every day, add carbonic acid to the bucket. Ammonium hydrogen 250-400 grams. Ammonium bicarbonate is wrapped with a film, and then 12 holes are used to tie 3 holes in the film to control the reaction rate of ammonium bicarbonate and sulfuric acid. After more than two hours, the barrels of sulphuric acid and ammonium bicarbonate can be reacted. During this period, no ventilation has been provided. At around 12 o'clock noon, the tuyere is opened for ventilation.
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