Fruit tree common fertilizer damage and prevention

1. Common fat damage: When deep-turning soil and deep-ditch fertilization, the organic fertilizer is too large or the organic fertilizer is too concentrated, or the organic fertilizer is not fermented and fermented, causing burning roots; excessive, excessive or Excessively concentrated application of urea, potassium nitrate, ammonium sulfate, ammonium bicarbonate and other quick-acting fertilizers, causing burning of roots; when topdressing outside the roots, the concentration of fertilizer is too high, causing the leaves to be anxious and dry; improper long-term fertilization, deepening the soil The acidification or alkalization is caused by the excessive acidity and alkalinity of the soil solution; the soil organic matter is less, the soil is sticky and too compact, the applied fertilizer is not easy to spread quickly, and the local concentration of the fertilizer is too high and the root is damaged; Unqualified fertilizers are also prone to fat damage.

2, prevention methods: In order to prevent the occurrence of fertilizer damage, according to the cause of the occurrence of fertilizer damage, take appropriate preventive measures. For fertilizer damage that may occur due to deep soil turning and deep open ditch application of organic fertilizer, it may be adopted to prepare fine manure, uniformly fertilize, mix the manure, and water after fertilization; for fertilizer damage that may occur due to chemical fertilizer, Adopting reasonable fertilizer varieties due to the nature of the soil, balancing fertilization, controlling the amount of chemical fertilizers, and applying less each time, mastering the principle of “small number of times”, more ditching, widening the ditch and evenly spreading, with water Into the method of prevention; for the fat damage caused by fertilization outside the root, we must choose a safe type of fertilizer, strictly control the use concentration (generally 0.3-0.5%) and the use period, time, avoid spraying at high temperature and other methods to prevent; For the fat damage caused by excessive soil compaction, it should be prevented by deep-turning the ground, adding organic fertilizer, and returning straw to the field. It is strictly forbidden to buy and use fake and fake fertilizers.
Hua County Wu Limin
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