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Detailed Explanation of Key Points of Autumn Cultivation and Management Techniques for Cherry Blossoms

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Autumn basal fertilizer application: Generally, basal fertilizer is applied in early September, when the fertilizer has enough time to decompose and can be absorbed and utilized by the tree before dormancy. At this time, the roots cut by fertilization can heal quickly and sprout a large number of absorbing roots, improving the tree's absorption and utilization rate of fertilizer. The types of fertilizer applied are mainly decomposed farmyard manure, combined with a small amount of chemical fertilizer. Generally, 50 to 75 kg of soil and miscellaneous manure is applied per young tree. Autumn basal fertilizer should not be applied too deep; 40 to 50 cm is appropriate. Young trees can use the trench application method, and vigorous trees can use the broadcast application method. If the tree is found to have

Autumn basal fertilizer application: Generally, basal fertilizer is applied in early September, when the fertilizer has enough time to decompose and can be absorbed and utilized by the tree before dormancy. At this time, the roots cut by fertilization can heal quickly and sprout a large number of absorbing roots, improving the tree's absorption and utilization rate of fertilizer. The types of fertilizer applied are mainly decomposed farmyard manure, combined with a small amount of chemical fertilizer. Generally, 50 to 75 kg of soil and miscellaneous manure is applied per young tree. Autumn basal fertilizer should not be applied too deep; 40 to 50 cm is appropriate. Young trees can use the trench application method, and vigorous trees can use the broadcast application method. If the tree is found to have a nutrient deficiency, a small amount of trace elements can be mixed in appropriately.

Deep digging of the tree disk: Before the peak period of autumn cherry blossom root growth arrives, in combination with the application of basal fertilizer, deep digging of the tree disk can increase the amount of deep roots, store water and preserve moisture, and raise soil temperature. Clean up dead branches, fallen leaves, weeds, etc. in the tree disk, and burn them in a concentrated manner to eliminate overwintering insect sources and fungal sources.

Autumn pruning: In combination with the tree's growth condition, promptly thin out dense branches, crossing branches, overlapping branches, and diseased and pest-infested branches to improve the ventilation and light penetration of the canopy and strengthen the tree vigor. Use a sharp knife to smooth and scrape the wounds clean, apply 5-degree lime sulfur solution for disinfection, and then apply a protective agent such as tung oil to prevent wound rot.

Prevention and control of brown spot and shot hole disease: August-September is the peak incidence period, and the disease is severe when there is much wind and rain. When tree vigor is poor, the incidence can also worsen. Symptoms: Infected leaves first produce small purplish-brown spots, which soon expand into concentric-ring round spots about 5 mm in diameter. The edges of the lesions are almost black, and later brown mold-like substances appear on both sides of the diseased leaves, and the center of the lesion dries up and falls off. Prevention and control methods: 1. Strengthen cultivation management, create good ventilation and light penetration conditions, apply more phosphorus and potassium fertilizer, and enhance disease resistance. 2. In autumn, clear away diseased fallen leaves, and combine with pruning to cut off diseased branches to reduce the source of infection for the coming year. 3. During the disease period, spray 65% zineb 600-fold solution or 50% carbendazim 1000-fold solution.

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