Appropriate amount of fertilizer in winter to prevent damage

When fertilizing, the amount is too high and it is easy to cause fat damage. If the concentration of fertilization is too large, especially in high temperature and drought, it is easy to cause the concentration of soil solution to be greater than the concentration of root cell fluid, so that the cell loses water and the wall is separated, resulting in wilting of stems and leaves. In the seedling stage of crops, if the fertilizer is excessive, it is more likely to cause fertilizer damage. Therefore, when fertilizing, you should pay attention to watching the sky, seeing the seedlings, and seeing the fertilizer. It should be light and not suitable for concentration, and appropriate amount should be applied in time to prevent the occurrence of fertilizer damage.

The type of fertilizer is water type fertilizer. Due to excessive fertilization or insufficient soil moisture, the concentration of fertilizer in the soil is large, causing reverse osmosis in crop cells, causing dehydration of crops, which often causes crops to appear wilting, like frost or boiling water, which affects the normal growth of crops. Development, severe cases cause death.

Burn type fat damage. Some fertilizers, such as ammonium bicarbonate, are applied at relatively high temperatures, which are prone to produce a large amount of ammonia gas, burn crop leaves, and the lower leaves of the light crops are yellow, and the whole plant is red and yellow.

Toxic fertilizer. Some fertilizers, such as lime nitrogen, are directly applied to the soil to produce a toxic substance that poisons the roots of the crop. After applying an excessive amount of ammonium sulfate, the roots of the crop will become black due to hydrogen sulfide poisoning, causing crop growth to be blocked or even die.

Other fat damage phenomena. Urea is a high-concentration fertilizer and contains biuret. Urea as a seed fertilizer or seed dressing will affect its germination and even lose its germination power. Seed dressing with excess sodium superphosphate also affects seed germination. Soaked with 1% boron fertilizer for 4 hours and then sown, not germinated at all. Excessive chlorine can cause serious damage to chlorine-sensitive crops.

Scientific fertilization to prevent fertilizer damage, scientific fertilization, preferably deep application, and about 10cm from the root; urea should not be used as seed fertilizer; superphosphate should not be used too much; It is applied to water or mixed soil; ammonium bicarbonate should not be applied at high temperature; lime nitrogen can be used as base fertilizer, can not be applied as top dressing or seed fertilizer, and should be mixed with fine soil or farmyard manure, and applied after elimination of toxins by stacking and tanning; Organic fertilizer is applied, and the organic fertilizer must be applied after being decomposed.

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Chelating Element

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