Chestnut empty carp is the main reason for the low yield of chestnut. It is lack of trace elements such as boron, zinc, molybdenum, manganese and iron, which leads to pollen abortion and cannot be formed by normal pollination and fertilization. Replenishing these trace elements in the fall can enhance pollen vitality, promote pollination and fertilization, increase fruit set rate, and prevent openness.
In the autumn, combined with Shiqiu fertilizer, each plant will be applied with 0.25~0.30kg of Starpeng-Carinol trace element fertilizer or Han and Ou Shenzhong trace element fertilizer, or each plant will be added with zinc sulfate and borax 150~200. Gram, mix well with other fertilizers, and then dig around the canopy drip line to dig deep and wide 25~30 cm. At the same time, the leaves are sprayed 2~3 times with 0.1% borax, 0.1% zinc sulfate, 0.1% ferrous sulfate, 0.1% ammonium molybdate, 0.1% manganese sulfate, 800 times amino acid compound micro-fertilizer, sprayed every 7~10 days. Once, evenly spray all the branches and leaves inside and outside the canopy to start dropping with water drops, and add various trace elements from the leaves.
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