Shed vegetables, skillful gas fertilizer, high yield
The production of vegetables in greenhouses is basically in confined conditions, and the carbon dioxide content in the shed is low, which limits the use of photosynthesis. Therefore, carbon dioxide must be added. Tests have shown that cucumbers can increase production of carbon dioxide by more than 35%. Leaf vegetables are better to use carbon dioxide in the early growth period, and fruits and vegetables should be applied from the initial flowering stage.
Generally, the carbon dioxide topdressing is carried out at 9 to 11 o'clock in the morning on sunny days. Ammonium sulphate + sulfuric acid, or baking soda + sulphuric acid can be used to produce carbon dioxide by mixing so that the carbon dioxide content in the shed can reach 1,000 mg/kg. Do not ventilate the carbon dioxide when it is applied, and ventilate it after 1.5 to 2 hours of application. If the application of solid carbon dioxide gas fertilizer, per acre need to apply 40 kilograms, can be directly applied or buried on the surface, valid for up to 45 days.
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