Greenhouse vegetable why should complement carbon dioxide gas fertilizer

Why does the greenhouse crop lack carbon dioxide?Plant seeds germinate from roots, and then blossom, in addition to carefully watering fertilizer management, there is another important factor, is green plants for photosynthesis, consumes huge amounts of carbon dioxide, and photosynthesis in winter to ensure PengShi temperature, basic is airtight, production of carbon dioxide in the atmosphere is not added in time, it led to the lack of carbon dioxide in the PengShi.
The basic conditions for plants to survive are water, light and carbon dioxide.If one of these three elements is missing, the plant will wither and die.No amount of good fertilizer or good management will do.In these three elements, the plant's demand for water, the need for sunlight is seen with one's own eyes;Carbon dioxide is a colorless, odorless, non-toxic, invisible and untouchable gas, which is why it is often overlooked.
It has been determined that the normal concentration of carbon dioxide in the air is 300-500ppm, and that the plants absorb carbon dioxide from the atmosphere at any time when cultivated in the open air.In winter closed greenhouses, to maintain the canopy temperature to a certain extent, will not be able to a large number of ventilated take a breath, and the air is difficult to communication, bird plants absorb carbon dioxide, lead to relative to the critical value of carbon dioxide concentrations, makes the crops crop physiological reaction, to the normal photosynthesis, crops can't normal growth.Especially during the day, the sun came out after the crops for photosynthesis, light intensity reaches 1000-3000 lux, was a lot to absorb carbon dioxide, carbon dioxide if not timely added during this period, the plant will be due to the lack of carbon dioxide and decrease or stop the photosynthesis, is bound to affect crop yield and quality for a long time.It has been proved that the lack of carbon dioxide is one of the important limiting factors in vegetable production.Artificial supplementation of carbon dioxide is an important measure to achieve high and stable production of greenhouse.