2. "1, 2, 1" pruning method is suitable for longan, milk and other varieties. Horizontal scaffolding, single dragon stem shaping, hole spacing 1 ~ 1.5 meters, 2 ~ 3 plants per hole, one dragon vine every 50 ~ 60 cm on the frame surface, and the single branch is updated alternately. The meaning of this method is to leave two short branches (1 ~ 2 nodes) and 1 middle branches on the long vine every1m on the scaffold surface, and trim the long branches spread by the dragon with long branches. There are two dragons per 1m wide shelf, which is equivalent to 14 ~ 20 buds, which is equivalent to 12000 ~ 18000 buds per hectare. In semi-arid areas, the sunshine is abundant, the grape branches are not easy to grow in vain, the pruning in summer is strictly controlled, and the flower buds at the base buds are often well differentiated. Generally, each ear weighs more than 0.5 kg, and the yield per hectare can be guaranteed to be 30,000 ~ 37,500 kg. This pruning method is more suitable for young fruit trees.
Third, the pruning of trees in full fruit period.
Trees in full fruit period generally refer to 13 ~ 40 years old trees. During this period, the fruit yield of trees increased year by year, and the vegetative growth gradually weakened. If it is not managed properly, it is easy to have years. Therefore, the main task of pruning is to adjust the relationship between growth and fruiting, improve lighting conditions, maintain tree potential, and obtain high and stable yield.
4. Pruning of aging trees Trees that are 30 to 40 years old have entered the aging period. The main task of pruning is to renew and rejuvenate, restore tree vigor, extend the fruiting period as much as possible, and maintain a good yield. In the specific operation, the trunk and lateral branches should be retracted and raised appropriately according to the degree of weakness. If the central branch group has declined, it should be sawed off from the base to change the crown into a pleasing shape, but the wound should be protected to prevent decay. For aging trees, we should make full use of long branches to cultivate new fruiting branches, at the same time, renew and rejuvenate the original branches, and properly remove too dense flower buds to ensure the vigorous growth of branches.
Verb (abbreviation of verb) is cut again before flowering in bud stage.
From mid-March to early April, for trees with few flowers, when they are cut in winter, they leave more branches because they can't recognize the flower buds. When the flower buds can be clearly identified, the extra branches without flowers should be thinned or retracted appropriately, so that the inner room can be fully illuminated. For trees with poor varieties, high grafting can be started from liquid flow.