The results of the topping are generally completed within 4 to 5 days before flowering. 10 to 15 days before flowering, 4 to 6 leaves are selected after the last inflorescence on the new vine, so that the nutrients on the mother vine can be concentrated for flowering and New leaves develop. In May-June, depending on the grape variety and land conditions, the vegetative branches leave 8 to 12 leaves to be topped. The secondary shoots develop late, the result is weak, and the nutrient consumption is large. The vines and the vines can retain 2 to 3 secondary shoots above or at the top of the inflorescence, and the roots are picked at 2 to 3 leaves, and the other secondary shoots are completely erased. It is done within 15 days of the growth period. Summer shears should go weak and stay strong, go to stay, go to the dense, and finally achieve the purpose of good nutrition and good growth.
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