Core Tip: Rotten roots of fruit trees directly affect the normal growth of fruit trees, resulting in reduced orchard yield. The roots of fruit trees are largely caused by unreasonable management of fertilizer and water, and the source should be identified and carefully guarded.
Fruit tree root cause
1, long-term fertilizer home. Long-term application of chemical fertilizers such as diammonium, urea, potassium sulfate, compound fertilizer and compound fertilizer, the soil organic matter is seriously deficient, the beneficial organisms lose their living environment, the harmful bacteria are proliferated, causing rotten roots and dead trees, and trace elements in the soil. Severe depletion, serious physiological diseases, and decreased fruit quality.
2. A large number of unfermented and decomposed people, livestock and poultry manure are directly applied to the orchard soil. Because of the large number of pathogens, pests, salt, etc. carried by it, it will cause serious damage to the root system, and the heavy one will cause rotten roots and dead trees.
3. The tree storage nutrients are seriously insufficient. Poorly managed orchards, do not topdress in summer, do not apply base fertilizer in autumn, and the tree body is seriously deficient in nutrition, causing rot disease to flood.
Measures to solve the rotten roots
1. Change the concept of fertilization and get out of the misunderstanding of the fertilizer. Promote the application of farmyard manure, especially the application of high-quality commercial bio-organic fertilizer. If nitrogen, phosphorus and potassium are insufficient, supplement with nitro compound fertilizer, and vigorously advocate the use of fruit trees, weeds, straw smash and buried in the ground to improve soil aeration. All chlorine-containing fertilizers such as compound fertilizers, compound fertilizers and organic-inorganic fertilizers produced with ammonium chloride and potassium chloride are banned in fruit trees.
2. Improve fertilization methods and strengthen soil management. Apply fermented and decomposed farmyard manure, stir it evenly, turn it into the soil, and prevent the dredging and fertilization to concentrate on the root system. The application of bio-organic fertilizer and compound fertilizer makes the fertilizer widely contact with the absorption roots of the fruit trees. Sprinkle with fertilizer and soil and mix well to cover the soil to prevent the fertilizer from burning the root system.
3. Apply enough base fertilizer in autumn to increase storage nutrition. Harvesting early fruit trees such as large cherries, apricots, peaches, plums, etc., in September to complete the task of the autumn base fertilizer. Hawthorn, chestnut and late-ripening varieties of apples, pears, peaches and other fruit trees, after harvesting in October, must grab time to apply the base fertilizer, when the sensation is good, after the fall can also bring fruit fertilizer.
4. Unblock the drainage system to prevent water from accumulating in the orchard. In the orchard, through the whole planing orchard, the trunk is raised 15-20 cm to form a hatchback shape to prevent water from accumulating under the trees after heavy rain. The line between the fruit trees is 15 to 20 cm below the canopy. The dry days can be smoothly watered, and the rain can be drained smoothly after heavy rain.
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