Dehydration-type fertilizer is mainly caused by excessive application of chemical fertilizer at one time, or insufficient soil moisture, and the concentration of fertilizer solution in the soil is too large after fertilization, causing reverse osmosis of water in crop cells, resulting in dehydration of crops. Fertilized plants show wilting, like frost or boiling water. Lightness affects growth and development, and heavy plants die.
The smog-type fertilizer is mainly applied with ammonia, bicarbonate and other fertilizers. Such fertilizers are applied at high temperatures, which are prone to produce a large amount of ammonia gas, causing damage to crops, and lighter yellowing of the lower tip, affecting growth and development. The heavy ones caused the whole plant to die.
Burning type fertilizers Apply too much amount of seed fertilizer, or use superphosphate, or use alkaline volatile ammonium bicarbonate and urea, lime nitrogen and other chemical fertilizers to dress, often burning, resulting in lack of seedlings. In addition, when foliar fertilization is applied, the concentration used is too large, which may cause leaf burns.
Toxic fertilizers Some fertilizers, such as lime nitrogen, are toxic fertilizers that, after being applied to the soil, undergo a series of transformations to be absorbed by plants, but some toxic substances are produced during the conversion process to poison crops, causing them to be killed or killed. Therefore, the application amount should be strictly controlled when applying fertilizer, and the fertilizer should be used safely and rationally.
Author: Cai Hongxia
Source: Farmers Daily
Four fertilizers of crops
Chemical fertilizers can only achieve the purpose of increasing production if they are properly applied. If the application of chemical fertilizers is not suitable or the application method is improper, it will often lead to crop yield reduction, which is often said to be fat.
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