The greenhouse is a relatively closed environment, and the crops are constantly undergoing photosynthesis in the greenhouse. Therefore, the concentration of carbon dioxide in the greenhouse is significantly different from the external environment. The content of carbon dioxide in the greenhouse directly affects the growth of the crop. Too much or too little carbon dioxide will have a certain impact on the crop. When the carbon dioxide is sufficient, the healthy growth of the vegetables can be ensured, the chlorophyll content is increased, the leaves are dark green and shiny. It makes it bloom early, the flowers fall less, the leaves grow healthily, the fruit is correct, the morning market is high, and the yield is high.
Insufficient or excessive carbon dioxide in the greenhouse affects plant growth:
Insufficient carbon dioxide content: CO2 is the “food” of plants. Low-concentration CO2 environment puts plants in a “starved” state and has a great impact on plant biomass. For example, vegetables lacking carbon dioxide, the leaves are dark and dull, and the plants are long and poor; the flowering is late, the female flowers are less, the flowers and fruits are more shed; the leaves are flat, perpendicular or drooping with the main branches, and the leaves are uneven; 2-3 days after the listing, the output is low, and the quality of the fruit is small.
Excessive carbon dioxide content: Excessive concentration of carbon dioxide often causes the leaves of vegetable crops to curl, affecting the normal progress of photosynthesis, affecting the absorption of oxygen by crops, and failing to perform normal respiratory metabolism.
Therefore, many growers now add a certain amount of gas fertilizer to the greenhouse in order to make the vegetables grow better and increase the yield. The gas fertilizer currently developed is mainly carbon dioxide, because carbon dioxide is an essential raw material for photosynthesis of plants. Within a certain range, the higher the concentration of carbon dioxide, the stronger the photosynthesis of plants, so carbon dioxide is the best gas fertilizer.), increase the carbon dioxide content. So when should the carbon dioxide content in the greenhouse be applied?
During the daytime, the photosynthesis of green plants in the greenhouse is strong, and the concentration of carbon dioxide drops sharply; the photosynthesis at night stops, the carbon dioxide is released by crop respiration, and the indoor concentration of carbon dioxide gradually increases. Greenhouse cultivation keeps the crop in a relatively closed place for a long time. The concentration of carbon dioxide in the greenhouse varies greatly within one day. It reaches a maximum of 1000-1200ppm before sunrise, and drops to about 100ppm after 2.5~3 hours after sunrise. It is only 30 of the atmospheric concentration. About %, and it has been maintained until 2 hours in the afternoon to start to rise, and return to the atmospheric level around 4 pm. The concentration of carbon dioxide in vegetables is generally 1000-1500ppm, so the carbon dioxide deficiency in the greenhouse is quite serious, which has become an important factor affecting the yield of greenhouse vegetables. The installation of a carbon dioxide sensor in the greenhouse ensures that the gas is used in a timely manner in the event of insufficient carbon dioxide concentration. Ensure that vegetables, edible fungi, flowers, Chinese medicine, etc., provide morning market, high quality and high yield. Carbon dioxide sensors determine the growth and development of crops, maturity, stress resistance, quality,
Therefore,greenhouse CO2 concentration control is very important. The GLOREEN Smart Greenhouse Climate Control system have integrated CO2 sensor detection function on each device. Through the reasonable layout and installation of the system inside the greenhouse, the CO2 concentration inside the greenhouse can be fully detected. The user can check the CO2 concentration in time on the touch screen controller or set the corresponding CO2 concentration alarm. In combination with the CO2 generator, the amount of carbon dioxide produced is controlled so that the concentration of carbon dioxide is within an optimum range.
Meanwhile, the system has RS485 remote control protocol, with separate Integrated Controller, and even remote monitoring of CO2 concentration in the greenhouse or control temp and humidity.
