Chestnut has a long fruiting period, and the result is large, and it consumes a lot of nutrients. Before and after fruit ripening, the tree is in a state of starvation and semi-starvation, which is very weak. It is unfavorable for the second year of flowering. If it can be applied in time before and after harvesting Supplementing nutrients will speed up the recovery of the tree and promote the tree, laying a good foundation for high-yield and stable production in the second year. The specific practices are as follows:
When the chestnut fruit turns brown, the pre-harvesting fertilizer is mainly based on quick-acting fertilizer. The result is 50 kg or more of trees, 1.5-2 kg of urea per plant, 0.5-1 kg of potassium chloride, and applied after rain. After the decomposed human and animal manure water is 80-100 kg, it is drenched. After 5-10 days after fruit picking, the fertilizer is applied, mainly NPK compound fertilizer and high quality organic fertilizer. Each plant applies 2-3 kg of NPK fertilizer and 1.5-2 kg of rotted peanut bran. Tanning 25-30 kg of decomposed human and poultry manure. Around the canopy drip line, digging deep and wide 25-30 cm wide groove for fertilization. If the weather is dry, apply 80-100 kg of water to each tree or fertilize manure and manure after fertilization to promote fertilizer dissolution and conversion, supply root absorption and utilization, and improve fertilization effect. In addition, before and after fruit picking, foliar spray fertilizer is applied, and 3-5 times of 0.1% magnesium sulfate, 0.3% urea, and 0.5% potassium dihydrogen phosphate mixture are sprayed once every 7-10 days.
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