Pruning in winter can be done in the first ten days of fruit picking (1 1), because the leaves have not fallen, so we can clearly see the light in that position and prune the branches that are too dense properly.

Pruning can be carried out within one year, but the effect of pruning is different in different periods due to different ecological conditions, nutrient metabolism of trees and physiological state of organs. Winter pruning belongs to non-growth pruning, which is mainly carried out after fruit picking and before spring germination. At this time, citrus fruit trees are relatively dormant, with less growth, weakened physiological activities and less nutrient loss after pruning.

Generally speaking, in citrus producing areas without freezing injury in winter, the earlier pruning, the better the effect; In the production areas with freezing injury, it can be carried out after the temperature rises and warms up in spring, but before bamboo shoots are drawn. Renew rejuvenated old trees, weak trees and trees that are pruned again to promote germination, and also retract and prune when spring shoots sprout, so as to achieve more and stronger rejuvenation effect when new shoots sprout.

How to prune citrus

1, and cultivate the full crown skeleton.

Pruning Ehime 38 citrus is to cultivate a naturally happy crown skeleton. In the process of shaping and pruning, it is necessary not only to dry properly to cultivate a firm crown skeleton, but also to remove the core from the elongated branches of summer shoots, so as to facilitate branching, form a full crown and achieve high yield. It is also necessary to pick 2-3 buds at the top of the branches extending outside the crown, and the branches that are too dense in the crown should be smoothed or cut off as soon as possible to reduce nutrient consumption.

2. Cultivate main branches and prepare branches.

Generally, it is advisable to set the height of the stem at 30-5~8cm, so as to wipe off the buds under the main branches and promote branching. When the branch length reaches 5-8 cm, you can choose to keep the main branch and prepare 5-7 branches. After the new shoots mature, you usually choose three branches with different growth directions as the main branches, and then choose 2-3 branches as the auxiliary branches in the appropriate position of the main branches, so as to top the vigorous new shoots in time. Remove the long branches.

3. Pruning in fruiting period

Branches that can't bear fruit should be cut short to promote the appearance of summer shoots and expand the crown. After the summer shoots mature, the fruiting branches of autumn shoots should be cut short and cultivated, and the summer shoots with fruits should be smoothed to prevent the summer shoots from falling fruit.

Step 4 prune fragile branches

The weak branches should be cut off in time, and the dense branches and cross branches around the crown should be trimmed in time to promote the three-dimensional structure of the tree and make it have good fruiting ability.

5, pruning fertilization

Top dressing should be applied to Ehime 38 citrus before pruning, which is beneficial to citrus growth and orderly bamboo shoots. The fertilizer is mainly carbon-containing compound fertilizer, so as to avoid pruning consuming the nutrition of trees and affecting the tree potential.