What are the symptoms and preventive measures for high-concentration salts of vegetables?
A: High-concentration salt hazard symptoms: leaf color black and green has a hardening sensation, heart leaves are curled, young leaves and flowers have dry tips, and plants are dwarfed. The shoulders of tomato fruit have dark green stripes, which are obviously different from the colors of other parts. The fruit grows slowly, and the plants with serious damage may even appear wilting and withering.
Causes: First, excessive use of livestock urine. Second, excessive application of chlorinated fertilizers causes the chloride ions to accumulate in the tillage layer, causing the soil solution concentration to be too high. Third, the root growth of the plant is hindered, resulting in root burning, which seriously affects plant growth.
Preventive measures: First, the livestock manure should be fully decomposed, and should be thoroughly mixed with the soil during application to avoid the single use of chemical fertilizer. Second, when the concentration of the soil solution is too high, the amount of irrigation and the number of irrigation should be increased. Salt should be drained during land recreation.
Q: What are the symptoms and preventive measures for vegetables that are harmed by ammonia?
A: Ammonia hazard symptoms: watery immersion in the leaf margin or veins at the beginning of the disease, especially in the case of continuous cloudy days, the leaves may appear wilting. After 2~3 days, the damaged leaves are white or brown and dry.
Cause: After applying the unfertilized chicken manure and cake fertilizer, under the action of high temperature and high humidity in the shed, the ammonia is quickly fermented to produce crops. In addition, the application of ammonium bicarbonate and urea to the surface also produces ammonia, which causes damage to the leaves of the plants.
Preventive measures: First, organic manure such as chicken manure and cake fertilizer must be fully decomposed before application. Urea, ammonium bicarbonate is dissolved in water before use or hole-buried. Second, the ventilation should be increased before and after fertilization, especially the shed with ammonia hazard should be quickly ventilated. For the lightly affected vegetable crops, water and fertilizer management should be strengthened, and the curtains should be shaded to promote their growth. Author: Chen Shou Lun
A: High-concentration salt hazard symptoms: leaf color black and green has a hardening sensation, heart leaves are curled, young leaves and flowers have dry tips, and plants are dwarfed. The shoulders of tomato fruit have dark green stripes, which are obviously different from the colors of other parts. The fruit grows slowly, and the plants with serious damage may even appear wilting and withering.
Causes: First, excessive use of livestock urine. Second, excessive application of chlorinated fertilizers causes the chloride ions to accumulate in the tillage layer, causing the soil solution concentration to be too high. Third, the root growth of the plant is hindered, resulting in root burning, which seriously affects plant growth.
Preventive measures: First, the livestock manure should be fully decomposed, and should be thoroughly mixed with the soil during application to avoid the single use of chemical fertilizer. Second, when the concentration of the soil solution is too high, the amount of irrigation and the number of irrigation should be increased. Salt should be drained during land recreation.
Q: What are the symptoms and preventive measures for vegetables that are harmed by ammonia?
A: Ammonia hazard symptoms: watery immersion in the leaf margin or veins at the beginning of the disease, especially in the case of continuous cloudy days, the leaves may appear wilting. After 2~3 days, the damaged leaves are white or brown and dry.
Cause: After applying the unfertilized chicken manure and cake fertilizer, under the action of high temperature and high humidity in the shed, the ammonia is quickly fermented to produce crops. In addition, the application of ammonium bicarbonate and urea to the surface also produces ammonia, which causes damage to the leaves of the plants.
Preventive measures: First, organic manure such as chicken manure and cake fertilizer must be fully decomposed before application. Urea, ammonium bicarbonate is dissolved in water before use or hole-buried. Second, the ventilation should be increased before and after fertilization, especially the shed with ammonia hazard should be quickly ventilated. For the lightly affected vegetable crops, water and fertilizer management should be strengthened, and the curtains should be shaded to promote their growth. Author: Chen Shou Lun
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