Greenhouse planting technology is continuously expanding. After a long period of trial and comparison, we can conclude that the carbon dioxide concentration in the greenhouse has a great influence on the growth and yield of crops. In the same greenhouse, under the same management level and variety conditions, cucumbers that use carbon dioxide gas fertilizer have thicker green leaves, thicker stalks, and higher rate of nectarine than unapplied cucumbers. By artificially adding carbon dioxide gas fertilizer, the carbon dioxide concentration in the shed is increased to 700 to 1000 ppm, that is, when the concentration of carbon dioxide in the air is increased by 1 to 2 times, the greenhouse vegetable can generally increase production by more than 30%, and the input-output ratio can reach an average of 1 :8~l:10. When the time and amount of carbon dioxide gas fertilizer application in the greenhouse are determined, a carbon dioxide monitor can be used for the determination.
There are many methods for carbon dioxide application. High-efficiency solid carbon dioxide gas fertilizers are based on high-quality carbonates and are compatible with carriers of macro-elements. They are processed by special processes and are chemically stable, have good physical properties, and are suitable for a wide range of crops. , Simple and safe operation, easy to use, easy to control the amount of use, no harmful gas associated with other significant features. After being popularized in Xi'an, Xianyang, Baoji, Yan'an, Yulin, Gansu Province, and Pingliang and Tianshui in Gansu Province, its production increase effect is generally above 30%, and it is widely welcomed by the majority of vegetable farmers.
The use of high-efficiency solid carbon dioxide gas fertilizers: first in the caliber 20-30. m plastic pots filled with 2 / 3 of the water, open the outer bag, there is a bag of main material and two bags of accessories, cut the main bag, the main material into the water, then open a bag of accessories, add water, use The stick is stirred gently, that is, there is a sufficient amount of carbon dioxide gas released. Another bag of excipients is added to the water the next day to continue the reaction, which can achieve the purpose of artificially supplementing carbon dioxide. In the growing period of crops such as vegetables, tobacco, flowers, and cotton, the application can be started after the first true leaves grow, until the end of the seedbed period. For vegetables that are planted in greenhouses, they are generally used 3 to sd after planting, and are stopped at the end of harvest.
Through the analysis of the CO2 concentration in the greenhouse through the CO2 monitor, it was found that the concentration in the greenhouse was constantly changing during the day. In a confined greenhouse, the concentration of carbon dioxide in the shed gradually increases from sunset and reaches a maximum before sunrise in the morning. After sunrise, with the onset of photosynthesis, the carbon dioxide accumulated at night in the shed was consumed by photosynthesis in less than half an hour, the concentration of carbon dioxide dropped sharply and the vegetables began to be in a state of carbon dioxide starvation. Therefore, it is best to add carbon dioxide artificially half an hour to 1 hour after sunrise. Do not ventilate within two hours after application, so that vegetables can be fully and effectively used. Actively, scientifically and effectively promoting the use of new technologies for carbon dioxide fertilization will inevitably add new vitality to the vigorous development of greenhouse vegetable production and make it bear even more gratifying results.
There are many methods for carbon dioxide application. High-efficiency solid carbon dioxide gas fertilizers are based on high-quality carbonates and are compatible with carriers of macro-elements. They are processed by special processes and are chemically stable, have good physical properties, and are suitable for a wide range of crops. , Simple and safe operation, easy to use, easy to control the amount of use, no harmful gas associated with other significant features. After being popularized in Xi'an, Xianyang, Baoji, Yan'an, Yulin, Gansu Province, and Pingliang and Tianshui in Gansu Province, its production increase effect is generally above 30%, and it is widely welcomed by the majority of vegetable farmers.
The use of high-efficiency solid carbon dioxide gas fertilizers: first in the caliber 20-30. m plastic pots filled with 2 / 3 of the water, open the outer bag, there is a bag of main material and two bags of accessories, cut the main bag, the main material into the water, then open a bag of accessories, add water, use The stick is stirred gently, that is, there is a sufficient amount of carbon dioxide gas released. Another bag of excipients is added to the water the next day to continue the reaction, which can achieve the purpose of artificially supplementing carbon dioxide. In the growing period of crops such as vegetables, tobacco, flowers, and cotton, the application can be started after the first true leaves grow, until the end of the seedbed period. For vegetables that are planted in greenhouses, they are generally used 3 to sd after planting, and are stopped at the end of harvest.
Through the analysis of the CO2 concentration in the greenhouse through the CO2 monitor, it was found that the concentration in the greenhouse was constantly changing during the day. In a confined greenhouse, the concentration of carbon dioxide in the shed gradually increases from sunset and reaches a maximum before sunrise in the morning. After sunrise, with the onset of photosynthesis, the carbon dioxide accumulated at night in the shed was consumed by photosynthesis in less than half an hour, the concentration of carbon dioxide dropped sharply and the vegetables began to be in a state of carbon dioxide starvation. Therefore, it is best to add carbon dioxide artificially half an hour to 1 hour after sunrise. Do not ventilate within two hours after application, so that vegetables can be fully and effectively used. Actively, scientifically and effectively promoting the use of new technologies for carbon dioxide fertilization will inevitably add new vitality to the vigorous development of greenhouse vegetable production and make it bear even more gratifying results.