The output of crops is affected by the amount of photosynthesis. In the process of photosynthesis, carbon dioxide and water are both essential substances. If the content of carbon dioxide in the air is too low, it is only 33 ppm. Therefore, the addition of carbon dioxide gas fertilizers to greenhouses or large plastic bottles can greatly increase the output of vegetables. The carbon dioxide content can generally be measured using a carbon dioxide detector.
Different plants have different requirements for CO2 under different climatic conditions. If the CO2 concentration exceeds the limit, crops will be reduced. Therefore, the device must monitor and control the concentration of CO2 in the air so that it reaches its optimum value. At present, the existing CO2 detectors at home and abroad are expensive and are not suitable for use by Chinese farmers. To this end, the director of the State Science and Technology Commission Song Jian proposed that as soon as possible to develop a cheap CO2 detector to solve the urgent needs of vegetable production. The new type of CO2 detector developed by Jilin University is mainly characterized by low price (only a few hundred dollars). High precision, AC and DC dual use. It is pull type, low power consumption (power saving), simple operation. It is very suitable for rural areas. .
The stronger the sunlight is, the higher the degree of judging, the stronger the photosynthesis of the plant, and the more C gas the Dan wants. Therefore, when the sun is strong at noon on a sunny day, the plastic rods have a high degree of overheating. CO2 gas fertilizer should be applied more frequently, and the concentration should be controlled at 1000. Ie between pm. In the morning or in the afternoon, when the sun is weak and the temperature is low in the big urn, C fertilizer should be applied sparingly, and the concentration should be between 500 and 1ooppm. Cloudy or rainy days, there is no sunlight. C gas fertilizer should not be added.
According to the demonstration results of CO2 detectors across the country in the past two years, the effect of vegetable production increases significantly. Compared with the control amnesty, the average increase of 20% per mu. For example, in 1995, Rongtian used a carbon dioxide detector to monitor and control C-gas fertilizer in the subzone of Changchun Suburb of Changchun City, Jilin Province, and the plastic cul-de-sac. The yield of cucumber was increased by more than 1,500 kilograms. Each year, the plastic scorpion receives at least two dishes, and the room receives at least four dishes. It can increase income by several thousand dollars. In the country, there are at least 10 million rooms and plastic scorpions, and they will increase production by several billion kilograms per year, with significant social benefits. At present, the instrument has been widely used in Jilin, Liaoning, Beijing, Hebei, Shandong, Henan and Anyi provinces and cities.
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