Generally, mulberry trees are pruned from late December to mid January of the next year. After the beginning of spring, the temperature gradually picked up, the physiological activities of mulberry began to increase, and the buds on the branches began to sprout. If pruning at this time, it will cause a lot of loss of nutrients and water, resulting in the upper part of the cuttings do not sprout or sprout less and weak bud, greatly reducing the yield and quality of mulberry leaves. Therefore, it is not too late to prune mulberry trees in winter.
When pruning, special pruning tools shall be used. It is forbidden to use sickle, wood knife and other knives to cut randomly, which will cause damage to branches, bark, bud mouth, etc., and avoid uneven cutting mouth, otherwise it is not conducive to the growth of mulberry. In the process of mulberry pruning in winter, it is necessary to select and keep enough growth branches and cut off useless branches. The length of the remaining branch is suitable for cutting about 10-15 cm long at the cutting mouth. Different treatment is needed for different types of mulberry. If "jiwo mulberry" is used, it is necessary to keep robust branches, cut off diseased branches, residual branches, weak branches, etc.; if it is a "clustered branch", it is necessary to remove the weak branches and keep the growth of lateral branches, so as to maintain the reasonable distribution and even development of branches and give full play to the group advantages..
Strengthen the management of mulberry garden after winter cutting, thoroughly remove the weeds under the trees, loosen the nearby soil, and eliminate the overwintering pests and eggs. For mulberry trees that have not applied base fertilizer before pruning, it is necessary to apply enough organic fertilizer after winter pruning, and at the same time, apply some more phosphorus fertilizer to supplement its nutrients, which can enhance the stress resistance of mulberry trees.
