When the buds are picked, the buds are left, and the principle of leaving the dense buds is removed. The excessive buds in the middle and lower parts of the strong branches are removed, leaving 4 to 5 large buds. After the grafting of chestnut trees, the length of some branches is obvious in two years, which will inhibit the growth of other branches and affect the formation of crowns. After the spring shoots begin to grow, it is necessary to manage the branches of the branches in time to promote the formation of more saplings. Increase the number of female flowers.
Usually, the ratio of male flowers to female flowers is 20 to 50:1. Excessive male flowers consume a lot of nutrients and reduce the yield. The scientific approach is: generally only the top 3 to 5 inflorescences of the new shoots, so that the ratio of male flowers and female flowers is maintained at about 5:1. In addition, the application of potassium fertilizer is also conducive to inhibit the growth of male inflorescences.
Fertilization of chestnuts should be high-yielding. In addition to the routine application of nitrogen, phosphorus and potassium fertilizers, it is important to apply boron fertilizer and zinc fertilizer. Master the mixture of 0.2% borax and 0.2% zinc sulfate when the female inflorescence appears, once a week. Conditional chestnut gardens can be used to produce 40 kg of high-quality soil and fertilizer, 0.75 kg of urea, 0.5 kg of potassium dihydrogen phosphate or 1 kg of superphosphate to increase the yield per plant.
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