1. Control the amount of nitrogen fertilizer and increase the amount of organic fertilizer.

The main reason for the long thorns in Wogan is excessive nitrogen fertilizer and the plants grow in the direction of vegetative growth. In the young tree period of Wogan, in order to rapidly expand the tree potential, a large number of inorganic nitrogen fertilizers were applied. After applying nitrogen fertilizer, the leaves grow, but the thorns also grow. The bigger the leaves, the longer the thorns. Therefore, nitrogen fertilizer should be applied reasonably, organic fertilizer should be increased, balanced fertilization should be paid attention to, excessive growth of branches and nitrogen fertilizer should be prevented, and fertilizers with high phosphorus and potassium can be applied to promote rapid maturity of branches.

2. New branch pruning methods

With the maturity of new shoots, the color of leaves changes from light green to dark green, and the maturity of branches is about 80%, which is the best time for pruning, because the nutrition of new shoots has been exhausted at this time, and branches are not easy to grow after pruning; The best position for pruning is to cut off new and old branches at 1/2. Its principle is to weaken the growth of new buds. After pruning, 3-5 new shoots will be pulled out, and then 2-3 strong shoots will be left according to the growth, and the nutrition originally supplied to 1 new shoot will be dispersed to 2-3 new shoots. After the nutrients are dispersed, the overgrowth of branches can be effectively reduced, and the nutrients are given priority to the leaves for photosynthesis. At the same time, it will supply the growth of new shoots, and the thorns will naturally weaken, thus achieving the purpose of saving.

3, timely needle method

When sprouting new buds, when the thorns are not lignified, the small tender thorns between leaf buds can be manually erased. Compared with the above two methods, this method is more labor-consuming, but it is thorough in removing thorns and saves time and effort than cutting lignified hard thorns with scissors.

4. The above is Vogan's method of removing thorns.