Beware of ammonia poisoning in greenhouse vegetables
2022-10-06 02:04:36
Covering the grown greenhouse vegetables with plastic film, ammonia poisoning often occurs when there is continuous high temperature in the spring. According to the survey, pepper, tomato and cucumber are very sensitive to ammonia, followed by vegetables of eggplant and leafy vegetables. It has been determined that when the concentration of ammonia in the air in the greenhouse reaches 5 ml/L, the vegetables begin to be harmed. The way of this kind of harm is that ammonia gas enters the body through the pores and water holes of the plant, so that the young shoots and the most vitality happen to be reduced, and the damaged leaves quickly appear fading symptoms, like boiling water burns.
The reason for the ammonia poisoning is that the urea, ammonium bicarbonate, human excrement and the like directly produce ammonia gas on the ground of the greenhouse; the second is to apply the organic fertilizer which is not yet decomposed, and release the ammonia gas during the conversion process; Or excessive input of organic fertilizer is more likely to produce ammonia; fourth, the environment around the greenhouse will also introduce ammonia.
Ammonia poisoning in greenhouse vegetables occurs every year, causing losses in the production of shed vegetable. However, if the safety status of the gas in the shed is identified early, the hazard can be prevented. Therefore, pay attention to the following points.
Safety fertilization is the application of organic fertilizer as the base fertilizer, it must be fully decomposed; Second, chemical fertilizers and organic fertilizer can only be applied in the ground can not be applied; third, fertilization can not be excessive, especially the top dressing should be a small number of top dressing;墒 Fertilization, or watering after application, so that the fertilizer can be decomposed and released in time.
Detecting ammonia gas Always check the gas state in the shed. Use the pH test paper sold by the pharmaceutical company to determine the pH value of the water droplets in the shed film. When the pH is above 8.2, it must be vented in time. If it is a little slow, poisoning will occur.
Timely rescue when the vegetables in the shed have symptoms of ammonia poisoning, in addition to the release of air and exhaust, one must quickly fill the water, reduce the concentration of soil fertilizer solution, the second must be sprayed with "Hui Manfeng", "Gaomei Shi" and other activities Liquid fertilizer, the concentration of 1:500 times, can better balance the pH of the plant and soil, and the third is to spray 1% edible vinegar on the back of the plant leaves, which can alleviate and alleviate the hazard.
Huaxian Agricultural University Liu Huimin
The reason for the ammonia poisoning is that the urea, ammonium bicarbonate, human excrement and the like directly produce ammonia gas on the ground of the greenhouse; the second is to apply the organic fertilizer which is not yet decomposed, and release the ammonia gas during the conversion process; Or excessive input of organic fertilizer is more likely to produce ammonia; fourth, the environment around the greenhouse will also introduce ammonia.
Ammonia poisoning in greenhouse vegetables occurs every year, causing losses in the production of shed vegetable. However, if the safety status of the gas in the shed is identified early, the hazard can be prevented. Therefore, pay attention to the following points.
Safety fertilization is the application of organic fertilizer as the base fertilizer, it must be fully decomposed; Second, chemical fertilizers and organic fertilizer can only be applied in the ground can not be applied; third, fertilization can not be excessive, especially the top dressing should be a small number of top dressing;墒 Fertilization, or watering after application, so that the fertilizer can be decomposed and released in time.
Detecting ammonia gas Always check the gas state in the shed. Use the pH test paper sold by the pharmaceutical company to determine the pH value of the water droplets in the shed film. When the pH is above 8.2, it must be vented in time. If it is a little slow, poisoning will occur.
Timely rescue when the vegetables in the shed have symptoms of ammonia poisoning, in addition to the release of air and exhaust, one must quickly fill the water, reduce the concentration of soil fertilizer solution, the second must be sprayed with "Hui Manfeng", "Gaomei Shi" and other activities Liquid fertilizer, the concentration of 1:500 times, can better balance the pH of the plant and soil, and the third is to spray 1% edible vinegar on the back of the plant leaves, which can alleviate and alleviate the hazard.
Huaxian Agricultural University Liu Huimin
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