In order to improve the yield and quality of Chinese chestnut, chestnut trees should be fertilized in summer. There are two main fertilization methods:
Soil fertilization The method of fertilizing with soil fertilization is relatively effective in the chestnut orchard with thin soil and severely deficient fertilizer. A round ring groove was excavated in the drip line of the chestnut canopy. The width of the groove was 25 cm and the depth was 20 cm. Each plant was given 1 kg of calcium phosphate, 0.3 kg of urea, and 0.25 kg of borax. When fertilizing, urea and borax should be dissolved in water first, and then ditching and applying water while applying fertilizer. After the fertilization, fill the trench back to prevent evaporation of nutrients. Applying a proper amount of soil-fertilizer to fertilize the soil during fertilization has a good effect on promoting multi-results and reducing the rate of empty chestnuts in the following year.
The top dressing fertilizer method is effective for all kinds of chestnut trees in summer. After mixing 0.3%～0.4% urea, 0.3%～0.5% potassium hydrogen phosphate solution and 0.3%～0.4% borax solution, spray the canopy before 9:00 AM on sunny days or after 3PM, spray again every 10 days. Times, you can spray twice. After heavy spraying, heavy rain should be sprayed again within 10 hours in order to ensure the effect of fertilization. (
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