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Occurrence law Excessive chemical fertilizer is buried near the root of the tree or the fertilization ditch is too close to the rhizome or the concentration of liquid fertilizer is too high, which is easy to poison the necrosis of roots and branches. In addition, improper application of acidic or alkaline fertilizers can also lead to the death of fruit tree roots.
Preventive measures 1 Rational application of chemical fertilizers. According to the pH of the soil, physiological alkaline fertilizer or physiological acid fertilizer is used. 2 Use the correct fertilization method. The fertilization ditch should not be too close to the rhizome; when applying liquid fertilizer (human excrement, pig manure, etc.), it should be diluted with water and then poured into the fertilization ditch, and then covered with soil; when applying granular fertilizer or powdered fertilizer, the hard block should be crushed. After the application, and to mix with the soil, spread evenly.
Fruit tree fertilization to prevent rotten roots
When the fertilizer is applied excessively, the fibrous roots and fine roots of the fruit tree turn reddish brown and gradually rot, and the main root cortex turns brown and necrotic. The necrotic cortex extends upward along the rhizome to the trunk, main branches, lateral branches and shoots, which can cause the whole plant to die.
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