How to apply the anti-high humidity carbon dioxide sensor in the greenhouse?
The greenhouse is a relatively closed place, and the carbon dioxide concentration in the greenhouse is obviously different from the external environment: the carbon dioxide concentration in the atmosphere is relatively stable module, generally around 350 ppm. At night, due to the respiration of crops, soil microbial activities, and the decomposition of organic matter, carbon dioxide will be released. The concentration of carbon dioxide can be about twice as high as outside the shed; before sunrise, the concentration of carbon dioxide in the shed reaches its highest value, which is higher than outside the shed. －3 times; one hour after sunrise, crops begin to photosynthesize, and carbon dioxide drops to about 300 ppm; at noon, under strong sunlight, the intensity of crop photosynthesis increases, and the concentration of carbon dioxide in the shed drops sharply to only 80-150 ppm. Carbon dioxide is one of the essential raw materials for photosynthesis of plants sensor. The content of carbon dioxide in greenhouses directly affects the growth of crops. Excessive or insufficient carbon dioxide will have certain effects on crops:
Excessive carbon dioxide concentration: It often causes the leaves of vegetable crops to curl, which affects the normal progress of photosynthesis, affects the absorption of oxygen by the crops, and cannot perform normal respiratory metabolism;
Insufficient carbon dioxide content: dark and dull leaves, late flowering, fewer female flowers, and more flowers and fruits; low and flat leaves, perpendicular to the main branch or drooping, uneven leaf surface; more heterogeneous fruits, late on the market, low yield, and few high-quality fruits .
Sufficient carbon dioxide can ensure the healthy growth of vegetables, increase the chlorophyll content, dark green and shiny leaves; make it bloom early, with fewer flowers and fruits, healthy leaf growth, correct fruit, and high yield.
Therefore, many growers now add a certain amount of gas fertilizer to increase the carbon dioxide content in order to make vegetables grow better and increase yield. So when should the carbon dioxide content in the greenhouse be applied?
As mentioned at the beginning of the article, although there is plenty of sunlight at noon and the roots of plants absorb enough water, because there is not enough carbon dioxide, plants cannot perform photosynthesis, and there will be a shortage of carbon dioxide, which will affect the normal growth of crops and affect yield and quality. Therefore, for vegetables or other crops cultivated in greenhouses and greenhouses, if carbon dioxide is supplemented manually after sunrise to meet the requirements of crop photosynthesis, crop yields and quality can be greatly increased, and higher benefits can be obtained. The flowering and fruiting period of crops is the most vigorous period of photosynthesis, and it is also the key stage for the accumulation of large amounts of dry matter. At this time, the effect of artificial carbon dioxide supplementation is the most obvious.
The installation of carbon dioxide sensors in the greenhouse can ensure timely alarm in the case of insufficient carbon dioxide concentration, so as to use gas fertilizer or increase organic fertilizer to ensure that vegetables, edible fungi, flowers, Chinese medicine, etc. are marketed early, with high quality and high yield. It can be said that the carbon dioxide sensor determines the growth and development, maturity, stress resistance, quality, and yield of crops.
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