The scientific method of ventilating air in greenhouse
The management of greenhouses has a certain scientific basis. Only by operating in the correct way can the production effect be achieved. There is also a great emphasis on windproofing in greenhouses. The general principle is that the greenhouses will open the straw curtains in the morning, but do not let the wind out within an hour after the straw curtains are pulled.
So why? Because after the straw curtain is covered at night, there is no light, and the vegetables in the greenhouse stop photosynthesis, but the respiration is going on all the time, releasing a lot of carbon dioxide, and the soil contains a lot of microorganisms, they will also decompose organic matter and thus Carbon dioxide is produced. After a night, a lot of carbon dioxide will accumulate inside the greenhouse, which is much higher than the carbon dioxide concentration in the outside atmosphere. When the grass curtain is opened the next morning, the sunlight begins to shine, and green plants such as vegetables begin to photosynthesize, which requires a large amount of carbon dioxide. Nutrients are stored in vegetables.
According to scientific research, most of the photosynthetic products of plants in greenhouses are synthesized under the condition of morning light. During the period before the release of the wind, the demand for carbon dioxide is large, which facilitates the accumulation of a large amount of organic matter, so that the yield of vegetables is greatly improved.
