Application of Carbon Dioxide Fertilizing Technology in Vegetable Production in Greenhouse

Application of Carbon Dioxide Fertilizing Technology in Vegetable Production in Greenhouse

In addition to the demand for nitrogen, phosphorus, potassium and other trace elements and moisture, carbon dioxide is also an indispensable basic raw material for vegetable crops. And the increase in carbon dioxide content can be beneficial to the photosynthesis of plants, which is conducive to the synthesis of organic matter in plants. The carbon dioxide content in the air is usually around 300PPM. Therefore, the lack of carbon dioxide in vegetable production is often overlooked. The special production method of vegetable production in greenhouses and the special season, carbon dioxide supplement is very necessary.
1, why should add carbon dioxide

In the cold winter, when the greenhouse vegetable is produced, the greenhouse is often kept in a closed state for the purpose of heat preservation, and the air in the shed is relatively blocked from the outside air, and the carbon dioxide cannot be supplemented promptly. After sunrise, with the acceleration of photosynthesis of vegetables, the carbon dioxide concentration in the shed dropped sharply and sometimes fell to the point of carbon dioxide compensation. Vegetable crops can hardly perform normal photosynthesis, affecting the growth and development of vegetables, causing diseases and reducing production. Under these circumstances, the use of manual methods to provide adequate amounts of carbon dioxide is a necessary measure.

2, how to add carbon dioxide

There are many ways to supplement carbon dioxide, and with the advancement of technology, continuous improvement.

(1) Combustion method: By combusting combustibles such as coal and oil in a greenhouse, carbon dioxide produced by combustion is used as a replenishment source. When using coal as a flammable material, it is necessary to select a type of coal that contains less sulfur, so as to avoid the influence of other harmful substances generated during combustion on vegetables.

(2) Chemical method: It is supplemented with a large amount of carbon dioxide released from the chemical reaction after the mixture of concentrated sulfuric acid (need to be diluted when used) and ammonium bicarbonate.

(3) Microbiological method: Organic fertilizer, manure fertilizer and rice straw are added, and carbon dioxide is slowly released as a supplement by microorganisms.

The above-mentioned several traditional methods have the disadvantages of cumbersome operations or poor results.

(4) Apply double micro carbon dioxide particle gas fertilizer, only need to sow in the greenhouse, depth about 3CM, each time 10 kg per mu, once valid for up to one month, a basket of vegetables is generally used 2-3 times, labor saving, The effect is better, and it is a new carbon dioxide fertilization technology that has more promotion and use value.

3, the effect of carbon dioxide supplement

After supplementing carbon dioxide with vegetables, it can promote the growth and development of vegetables, increase production, improve quality, and mention the morning market. Tests have shown that supplemental carbon dioxide can generally increase the fruit setting rate by more than 10% (soy fruit), improve the market for 7-10 days, and increase the yield by more than 20% (strawberries and eggplant melons). As long as it is used properly, there will be more obvious economic benefits.

4, note

(1) After supplementing carbon dioxide, greenhouses need to be sealed to reduce CO2 spillage and improve fertilizer efficiency.

(2) The use of traditional CO2 supplementation methods depends on the weather conditions and the growth period. Generally, it is applied in the early morning on sunny days, and should not be added on cloudy days. The amount of supplementation at the seedling stage is the least, the number of planting to fruit set is the highest, and the fruit set to harvest is the second.

(3) Long-term use of vegetables during the production period can achieve better results.

(4) At the same time as supplemental carbon dioxide, fertilizer and water management must be strengthened to promote the coordinated growth of vegetables.
Carbon dioxide is not as high as possible. High carbon dioxide will affect the dark reaction of photosynthesis, so to control its amount, it is always a human goal to be able to produce the maximum energy with the least amount of energy, so we can use warm and wet carbon dioxide. Recorder to achieve, through it to measure, in the different temperature and humidity when the carbon dioxide content is most consistent, when the carbon dioxide content is constant when the temperature and humidity of the highest yield, these instruments can help you achieve.

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