Most plants in nature are composed of more than 40 elements, including 16 elements such as carbon, hydrogen, oxygen, nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, iron, chlorine, boron, manganese, zinc, copper, and molybdenum, which are indispensable elements for the normal growth and development of plants. More than 90% of the dry matter in the vegetables and fruits we grow is composed of carbon, hydrogen, and oxygen. These substances are obtained through photosynthesis of crops. They are carbohydrates and organic matter.
Carbon dioxide is the direct raw material for crop photosynthesis, while nitrogen, phosphorus, potassium and trace elements in fertilizers are only components of crop chloroplasts, enzymes, etc. The proportion of carbon dioxide and water absorbed in the production of 100 kilograms of agricultural products can account for more than 92%, and only about 8% comes from fertilizers. It can be seen that the importance of carbon dioxide is far greater than fertilizers. The return on investment is more than three times higher than that of fertilizers, which cannot be replaced by any other fertilizers.
In actual production, people are used to the conclusion of open-air experiments in textbooks: crops have the strongest photosynthesis between 9 and 11 in the morning, take a nap at noon, and gradually reduce photosynthesis in the afternoon, so they believe that there is no need to supplement carbon dioxide in the afternoon. However, the latest scientific research shows that in greenhouses where the concentration of carbon dioxide can be regulated, as long as the concentration of carbon dioxide in the greenhouse is always kept at 1000-1500PPM, plants can always maintain a high photosynthesis intensity throughout the day, the nap phenomenon disappears, photosynthesis in the afternoon is enhanced, the utilization rate of various fertilizers is also high, and the photosynthesis amount reaches the highest value. Therefore, supplementing carbon dioxide in the greenhouse has the following effects:
1. Greatly improve the photosynthesis intensity of crops in the afternoon, and the plants change from one meal in the morning to two meals a day, and the yield will of course increase significantly.
2. High concentrations of carbon dioxide will inhibit the respiration of crops at night, indirectly increasing yields.
3. Carbon dioxide that is not used up in the afternoon will accumulate, raising the concentration of carbon dioxide the next morning, so that the plants can eat more in the morning.
Therefore, it is necessary to replenish carbon dioxide gas in time. We call this process of replenishing carbon dioxide gas the carbon dioxide fertilization process, and the added C02 is called carbon dioxide gas fertilizer.
