Carbon dioxide gas detector is used in greenhouses
Carbon dioxide is one of the raw materials for photosynthesis in green plants, and 95% of the dry weight of crops comes from photosynthesis. Therefore, carbon dioxide has become an important factor affecting crop yields. Plastic greenhouse cultivation keeps crops in a relatively closed place for a long time, and the carbon dioxide concentration in the greenhouse changes greatly. It reaches a maximum value of 1000-1200ppm before sunrise, and drops to about 100ppm 2.5-3 hours after sunrise, which is only the atmospheric concentration ( It was about 30% of 330ppm), and it did not start to rise until 2 hours in the afternoon, and returned to atmospheric levels around 4 pm. Vegetables require a carbon dioxide concentration of generally 1000 to 1500ppm. Therefore, the carbon dioxide deficit in plastic greenhouses is quite serious and has become an important factor affecting the yield of vegetables in plastic greenhouses. Installing a carbon dioxide monitor in a plastic greenhouse can ensure that a timely alarm occurs when the concentration of the carbon dioxide monitor is insufficient, allowing the use of gas fertilizer. Ensure that vegetables, edible fungi, flowers, traditional Chinese medicines, etc. are put on the market early with high quality and high yield.
1. Effect of carbon dioxide application on vegetable yield
According to the China Agricultural Information Network: Cucumbers, tomatoes, and zucchini are three common vegetables. In response to this actual situation, carbon dioxide fertilization experiments were conducted on these three vegetables, and the yield increase effect was very significant. Applying a carbon dioxide concentration of 1000 mg/kg to the three vegetables respectively, cucumbers increased their yield by 465.5 kg per 667 square meters, or 27.1%; tomatoes increased their yields by 410.7 kg per 667 square meters, or 23.6%; zucchinis increased their yields by 373.2 kg per 667 square meters. , an increase of 21.9%.
2. Effects of carbon dioxide application on vegetable plant traits
After carbon dioxide was applied to vegetables in plastic greenhouses, the plant properties were significantly better than those without carbon dioxide. After applying carbon dioxide to cucumbers, the plants grew well. The plants that were treated with carbon dioxide were 15 to 20 centimeters taller and 2 to 3 leaves longer than those without. The leaves were significantly larger and thicker. The leaf area of a single plant was 0.19 to 0.3 square meters larger, and the plants were 2 leaves earlier. Melons are formed at the nodes, and the fruit setting rate is high. There are more than 3 to 5 melons per plant. The melon strips that are applied are black and green, and the top 4 to 5 cm of the melon strips that are not applied are yellow. Moreover, the application of carbon dioxide gas fertilizer can also enhance the cold resistance and disease resistance of plants. After applying carbon dioxide to tomatoes, the plants were significantly taller, the leaves were dark green and thickened, the fruits matured earlier, and the fruit surface was shiny. The appearance of zucchini plants that were treated with carbon dioxide changed significantly compared to those that were not treated with carbon dioxide. The plants that were treated with carbon dioxide had enlarged leaves, thick stems, and large and strong plants, while the plants that were not treated with carbon dioxide were smaller and weaker. And Shi's performance turned out early.
