It can be done in early spring or early autumn. Don't minimize the damage to roots, branches and flowers caused by hot summer and cold winter.

First, the ability to bear fruit is strong, and the tree potential is enhanced. Young trees are weak and the roots are tender, so it is advisable to apply thin fertilizer frequently, loosen the soil and weed in time, eliminate weeds in time and save nutrients. Pay attention to irrigation and drainage, maintain moderate water content, and spray new high-fat film to keep fertilizer and water, which can effectively promote tree health.

Second, pruning trees and strengthening the promotion of fruits. Prune sparsely around the dense branches and leaves of the crown, then prune the top branches and lightly prune the inner branches, so that the internal light of the crown is good, the fruit is abundant and the quality is good. Put an antiseptic film on the knife wound in time to promote wound healing and prevent bacteria from invading and infecting. It is necessary to spray Zhuangguodiling in bud stage, young fruit stage and fruit expansion stage respectively, so as to thicken fruit pedicles, increase nutrient transport, prevent flower falling, improve pollination ability, increase fruit setting rate, speed up fruit expansion and ensure high quality and high yield of fruits.

Third, promote flower bud differentiation and balance fruit setting rate. The bearing capacity of trees is unbalanced due to the years of fruit bearing, which not only affects the balanced income, but also affects the health of trees in orchards. Brush Zhuhuawang 2 once a year during flower bud differentiation, which can promote flower bud differentiation, inhibit excessive growth of summer shoots, strengthen flowers, improve pollination ability and fruit setting rate; Brushing Wang Cuihua No.2 in late autumn can inhibit the germination of winter shoots, strengthen the nutrient metabolism of trees, and lay a good foundation for flowering and fruiting in the coming year.

Fourth, prevent and control pests and diseases, and protect trees from overwintering safely. There are many diseases and insect pests that harm orange trees, such as mites, scale insects, leaf miners and anthracnose. Control should be based on the occurrence characteristics of various pests and diseases, combined with pesticide application. At the same time, spray a new high-fat film to enhance the curative effect.