In the summer, do you remember the taste of that bottle of iced soda? Gently irrigate, cool from the inside to the outside; the gas spills from the stomach to the mouth, and the sweetness in the coolness makes people feel memorable. The gas in the soda is carbon dioxide, food grade.
“Our tomato not only needs to drink nutrient but also to absorb edible carbon dioxide in the soda.†In early June 2016, when the reporter visited the Ohe Ecological Park in Bo'ao, Henan, the person in charge said Yulong.
The application of CO2 technology to plants in the greenhouse is now widely used in developed countries such as Europe and the United States. However, due to various reasons, the country is still relatively rare. The area of ​​the whole ecological modern agricultural botanical garden of Fraternity is using this technology in full compliance with Dutch standards. 
In the 24,000 m2 greenhouse demonstration area, all Dutch varieties of tomato and tomato were grown. Each tomato has its own gas to fertilize the crop through the CO2 pipeline underneath the substance matrix tank. According to the tomato growth needs, the automatic control system will automatically replenish the gas.
“Daily to vaporize liquid CO2 and replenish it through the pipeline to the greenhouse,†Yu Yulong, the person in charge, revealed that they have a particularly large impact on product quality and taste.
It is understood that CO2 is the main raw material for plant photosynthesis and is therefore called “food for plants.†For the effect of CO2 on the increase of crops, American scientists have done such experiments on a farm in New Jersey, and the growth of crops has been strong. The use of this gas during the maturation and maturation periods occurs twice a week and after spraying 4 to 5 times, the vegetables can increase production by 90%, rice by 70%, soybean by 60%, and sorghum can even increase production by 200%.
CO2 gas is more important in the greenhouse. Due to the gradual decline of CO concentration in greenhouses with photosynthesis in greenhouses, it is far from meeting the need for photosynthesis, often leaving the plants in a state of “starvationâ€, limiting the growth of plants, and greatly affecting the yield and quality.
Regularly adding CO2 gas to greenhouses can increase root development, increase the intensity and efficiency of crop photosynthesis, increase the plant nutrient absorption rate by more than 2.7 times, improve product quality, and significantly increase crop yields.
The effect of CO2 gas on plants is so obvious that the use in the country is extremely limited. Yu Yulong told reporters that currently the methods used in China generally include biodegradation, combustion, electrolysis, soil chemistry, and finished gas. However, the use of operating methods is cumbersome, the investment is large, the cost is high, and the impurities are numerous and difficult to popularize. The use of CO2 gas in ecological parks has reached the level of food safety, and full-Automation regularly supplements domestic technologies based on needs. 
The use of CO2 technology in the process is one of the important reasons for the 4,000,000 kilos per hectare of small tomatoes in Europe and the Netherlands. It is worth noting what kind of changes the future tomato market will cause.
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