1. Smoked-type fertilizer: mainly applied ammonia, ammonium 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 lower leaves. Affects growth and development, and the whole plant turns yellow and dead.
Prevention: This type of fertilizer should be avoided at high temperatures.
2, burning type of fertilizer: mainly when the application of fertilizer is too large, or with superphosphate, ammonium bicarbonate, urea, lime and other fertilizers seed dressing, often burning, resulting in lack of seedlings.
Prevention method: The amount of seed fertilizer should not be too large, and no seed dressing such as superphosphate, ammonium bicarbonate, urea or lime nitrogen should be used.
3, poisonous fertilizer: Some fertilizers such as lime nitrogen, after being applied to the soil, must undergo a series of transformations to be absorbed by plants, but in the process of conversion, some toxic substances will be produced to poison crops, causing crop damage or death.
Prevention method: When applying fertilizer, the application amount should be strictly controlled, and the fertilizer should be applied safely and reasonably.
Prevention: This type of fertilizer should be avoided at high temperatures.
2, burning type of fertilizer: mainly when the application of fertilizer is too large, or with superphosphate, ammonium bicarbonate, urea, lime and other fertilizers seed dressing, often burning, resulting in lack of seedlings.
Prevention method: The amount of seed fertilizer should not be too large, and no seed dressing such as superphosphate, ammonium bicarbonate, urea or lime nitrogen should be used.
3, poisonous fertilizer: Some fertilizers such as lime nitrogen, after being applied to the soil, must undergo a series of transformations to be absorbed by plants, but in the process of conversion, some toxic substances will be produced to poison crops, causing crop damage or death.
Prevention method: When applying fertilizer, the application amount should be strictly controlled, and the fertilizer should be applied safely and reasonably.
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