In plant cultivation of vegetables, gas exchange is restricted, carbon dioxide in the outside air cannot be replenished into the greenhouse in time, resulting in insufficient indoor carbon dioxide, causing the vegetables to be in a state of carbon dioxide starvation for a long time, and the photosynthesis is slow, seriously affecting the yield and quality of vegetables. Manually supplement carbon dioxide.
The bag-type carbon dioxide fertilization technology can timely supplement the carbon dioxide gas in the protection facilities to maintain the concentration required for photosynthesis of vegetables and fruits, increase the accumulation of dry matter, and then achieve the purpose of increasing the output and improving the quality.
According to the results of field trials and demonstrations conducted by the Beijing Soil Fertilizer Workstation over many years on different types of CO2 fertilization methods (combustion method, chemical reaction method, particulate organic biogas fertilizer method, cylinder method, and new carbon dioxide gas fertilizer method) The technology has the characteristics of convenient use, high gas production, long release period, and environmental protection. It is necessary and feasible to popularize and apply this technology.
Increased production and efficiency: 15% increase in cucumber yield per mu, 30% increase in tomato yield per mu, 25% increase in chili per mu, and 43% increase in celery mu production.
Technical points:
1. Main technology: The carbon dioxide gas fertilizer is composed of generating agent and accelerating agent. When used, the two are mixed well. The mixed carbon dioxide fertilizer is put into a hanging bag with air hole and hung in the frame of the greenhouse and greenhouse. On top of that, the carbon dioxide produced inside the hanging bag will continue to be released from the pores.
2. Fertilization period: leafy vegetables began to be fertilized with carbon dioxide during the erection period. During this period, the leaves had strong vigor, high photosynthetic productivity, high CO2 utilization, and a large increase in yield. Solanaceous vegetables are the best period for carbon dioxide fertilization during flowering and setting fruit to fruit enlargement period. During this period, carbon dioxide fertilization is performed, organic matter is accumulated more, which can promote fruit enlargement and increase yield.
3. Fertilization method: Because carbon dioxide is heavier than air, in order that the added carbon dioxide can be uniformly applied around the functional leaf of the vegetable, the carbon dioxide generating device should be placed at the plant canopy height position, usually 0.5 meters above the vegetable, and take more The point is cast to ensure its uniformity, so that the added carbon dioxide can be fully and effectively used. Hanging bag type carbon dioxide generators should be hung on the frame in the greenhouse, greenhouses, according to the "zigzag" arrangement.
4. Fertilizer concentration: The concentration of carbon dioxide in fruit and vegetable vegetables should be 1000-1500ppm, and the carbon dioxide concentration of leafy vegetables should be 600-1000ppm. Generally, 15-20 bags are hung in a greenhouse of 1mu.
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