Vegetable facility cultivation carbon dioxide gas fertilizer application technology
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First, the application time. The optimum application time for gas and fertilizer should be carried out shortly after sunrise to maintain a high carbon dioxide level in the facility. If a carbon dioxide generator is used as the source of carbon dioxide, the fertilization time can be appropriately advanced to achieve the required carbon dioxide concentration within half an hour after sunrise. Ventilation is required in the protection facility at noon, and fertilization should be stopped half an hour before ventilation.
Second, the application period. The seedling stage is a period of better application of gas and fertilizer, which is conducive to cultivating strong seedlings, shortening seedling age, accelerating seedling development, and early flower bud differentiation of fruit and vegetable vegetables, which is very obvious for improving early yield. For fruits and vegetables such as tomatoes, cucumbers, and long melons, the use of carbon dioxide gas fertilizer during flowering to fruit expansion is the best, which can accelerate the process of fruit enlargement or maturation, reduce the occurrence of deformed fruit, and improve the early yield and commercial value of vegetables. .
Third, the application concentration. The concentration of gas and fertilizer application is closely related to crop types, varieties, light intensity, temperature, and even fertilizer and water. Most vegetable crops grow and produce a cost-effective carbon dioxide concentration of 600-1000ppm.
Fourth, note: (1) the application of carbon dioxide in the facility requires the facility structure to have good sealing performance. (2) The application of gas and fertilizer should be carried out according to the weather and the intensity of light. When the light intensity is strong, the concentration should be higher; if it is cloudy or weak, the concentration should be reduced; the rain and snow weather need not be applied. (3) After the application of carbon dioxide, the amount of fertilizer should be increased appropriately, but the excessive amount of fertilizer and water should be avoided. It is advisable to increase the application of phosphorus and potassium fertilizers and properly control the nitrogen fertilizer. (4) Fruits, strawberries, etc. generally start to apply carbon dioxide at the time of flowering, and the effect of continuous use is good. Therefore, in addition to rain and snow, it should be used continuously. Generally, the effect is obvious after 20-30 days. (5) During the period from planting to flowering, the melon and fruit crops may not be applied or less, and the vegetative growth shall be properly controlled, and the pruning and leafing shall be strengthened, and the flowers shall be preserved. In short, in the cultivation of vegetable facilities, reasonable application of carbon dioxide can promote plant growth and development, and achieve the purpose of increasing production and income, but the specific application should consider the growth of the plant itself, as well as environmental factors such as light and temperature.