After planting the seedlings of pomelo trees, cut them 30-40 cm above the joint and dry them. After pruning, select 3-4 new shoots with vigorous growth, uniform distribution around them and a certain interval between them as the main branches, and erase the rest. When the top of each main branch continues to extend to about 40 cm, it should be picked in time. On each main branch, choose 2-3 robust branches with appropriate positions as auxiliary main branches. Proper spacing should be kept between the main stem and the auxiliary main branches, so that the lateral branches of meristem can be fully illuminated. Always wipe off the branches that cross, overlap and disrupt the tree, and the branches and buds that are not in place.

2. Prune pomelo trees in the fruiting period.

Grapefruit bearing trees generally have strong bearing capacity. Therefore, the pruning of the first fruit tree should be light, not too heavy. Generally, only long branches, pests and diseases, dead branches and dense branches that are not in place should be thinned, and more internal branches should be left, and the bearing mother branches should not be shortened. The crown of adult trees has been formed, and the pruning objects are mainly the lateral branches on the main branches and various branches on them, with the aim of adjusting the balance between growth and fruit. The principle of pruning is that strong trees should be sparse, few short and dense branches, upright branches and lateral branches should be sparse, and drooping branches and weak branches should be left to facilitate flowering and fruiting. Weak trees mostly bear fruit on strong branches, so measures should be taken to remove the weak and keep the strong, and more leafy fruit branches should be kept.

3. Regeneration of pomelo trees during senescence.

The regeneration and pruning of pomelo trees in the aging period should be carried out before the germination of spring shoots or after the growth stops, and before the occurrence of summer shoots in May and June. Old trees should be bare and updated, and the main branches and auxiliary branches should be retained when updating. All the 3-4 year old lateral branches on the crown should be cut off, and no leaves should be left on the crown to promote the occurrence of strong branches. COVID-19 can be formed within 1-2 years after germination and shoot control, and the results can be recovered. For some rotten branches that still have the ability to bear fruit, a part of them can be updated every year and a whole tree can be updated in 2-3 years through rotation.

Extended data:

Pruning effect of pomelo trees

The first is to optimize the structure of pomelo trees.

Second, the angle and spacing between branches at all levels to achieve sufficient sunshine in the canopy.

The third is to adjust the crown height.

The fourth is to shorten the length of leafless branches and remove dead branches, pests and diseases.

The fifth is to cultivate more fruiting mother branches and increase yield.