How to prevent greenhouse vegetables harm ammonia
2020-11-01 12:16:02
Ammonia concentrations exceeding 5ppm in plastic greenhouses can cause harm, resulting in necrosis of the stems and leaves of the vegetables or death of the whole plant. When the concentration of ammonia in the air is too high, the plants first appear as water-soaked stems and leaves, then become brown and necrotic, and finally the whole plant withers. When the concentration of ammonia in the soil is too large, the activity of nitrate bacteria will be seriously affected. The main measures to prevent ammonia damage are described below:
1. Apply base fertilizer to fully compost compost, manure, and manure, and prevent fresh manure from entering the shed; apply organic compound fertilizer with high soil amendments and active substances as base fertilizer (or top dressing). Can not freely in the greenhouse for the fermentation of organic fertilizer.
Second, in top-dressing plastic greenhouses topdressing nitrogen fertilizers, deep trenching should be adopted as far as possible, and the trenches should be sealed after application. Fertilization should be uniform to prevent excessive localized fertilizer from producing spot hazards. After top-dressing, timely watering is used to promote decomposition of fertilizers to reduce ammonia production.
Third, the control of nitrogen fertilizer plastic greenhouse vegetable topdressing nitrogen fertilizer should not be excessive, especially urea, to a small number of times. Generally, topdressing urea at 10 square meters is not more than 0.6 kg. Can be mixed with superphosphate, acidic fertilizers have the effect of inhibiting ammonia harm.
IV. Ventilation After changing fertilizer and watering, take advantage of the high temperature of sunny days and timely open the doors and windows of plastic greenhouses for ventilation. On cloudy days, it is also advisable to make use of favorable opportunities such as noon to open windows for ventilation for a short period of time in order to reduce harmful gases and humidity inside the greenhouse.
5. Detoxification At any time, the concentration of ammonia in the air in the greenhouse can be detected. When the pH value of the water droplets on the film reaches 8.2, it indicates that the steam in the greenhouse is alkaline, and the greenhouse film should be opened immediately. When greenhouse vegetables are lightly harmed by ammonia, Huimanfeng active liquid fertilizer can be sprayed 800 times to release the poison quickly.
1. Apply base fertilizer to fully compost compost, manure, and manure, and prevent fresh manure from entering the shed; apply organic compound fertilizer with high soil amendments and active substances as base fertilizer (or top dressing). Can not freely in the greenhouse for the fermentation of organic fertilizer.
Second, in top-dressing plastic greenhouses topdressing nitrogen fertilizers, deep trenching should be adopted as far as possible, and the trenches should be sealed after application. Fertilization should be uniform to prevent excessive localized fertilizer from producing spot hazards. After top-dressing, timely watering is used to promote decomposition of fertilizers to reduce ammonia production.
Third, the control of nitrogen fertilizer plastic greenhouse vegetable topdressing nitrogen fertilizer should not be excessive, especially urea, to a small number of times. Generally, topdressing urea at 10 square meters is not more than 0.6 kg. Can be mixed with superphosphate, acidic fertilizers have the effect of inhibiting ammonia harm.
IV. Ventilation After changing fertilizer and watering, take advantage of the high temperature of sunny days and timely open the doors and windows of plastic greenhouses for ventilation. On cloudy days, it is also advisable to make use of favorable opportunities such as noon to open windows for ventilation for a short period of time in order to reduce harmful gases and humidity inside the greenhouse.
5. Detoxification At any time, the concentration of ammonia in the air in the greenhouse can be detected. When the pH value of the water droplets on the film reaches 8.2, it indicates that the steam in the greenhouse is alkaline, and the greenhouse film should be opened immediately. When greenhouse vegetables are lightly harmed by ammonia, Huimanfeng active liquid fertilizer can be sprayed 800 times to release the poison quickly.
China leading manufacturers and suppliers of Active Pharmaceutical Ingredient, Mupirocin , Mupirocin Calcium, and we specialize in Sodium Fusidate, Fusidic Acid.
Active Pharmaceutical Ingredient, Mupirocin, Mupirocin Calcium, Fusidic Acid, Sodium Fusidate Manufacturer
Fuzhou Contay Biotechnology Co., Ltd , https://www.contaybio.com