The greenhouse nectarines must be pruned before warming up

The general principle of pruning the greenhouse nectarine prior to warming up is: pruning of the long shoots, and the result is that the branches are not short cut, and the main branches are branches, and the branches are reasonably left. For the saplings colonized in that year, 10 to 15 branches were selected for each plant, and then 30 to 40 branches were selected for each plant as the case may be. The results should be uniform distribution of the branches, without affecting each other's growth results, and to make full use of the light. When pruning, the following branches need to be removed:
No flower or poor flowering results. Branches These branches are not only low in fruit setting rate, but also affect the internal lighting of the tree. They often compete with the result branches for fertilizer, competition for water, and glory.
Branches with pests and diseases The removal of branches damaged by pests and diseases is mainly to reduce the sources of diseases and insects, reduce the occurrence of pests and diseases, and increase the yield and quality of fruits.
With the dense branches remaining on the premise of leaving the resulting branches, the dense branches of the trees should be properly removed so that the result branches can be distributed evenly and reasonably to improve the ventilation and light transmission conditions of the trees. In general, the branches with stronger growth tend to be removed, leaving the result of the mediocre branch.
The effects of overcoarsing on the upper part of the upper part of the Wang branch are mainly affected by the tree body in three aspects: first, serious shading, affecting the growth and result of the lower middle result branch, and secondly, unstable branching and fruit setting. The rate is low; Third, the growth potential of the top of the tree is strong, the upper branches are too thick, and it is easy to cause strong and weak on the tree body, resulting in poor development of the fruit tree in the middle and lower parts and affecting the yield and quality of the fruit.
The overlapping branches and the competing branches overlapped each other and affected the light. The effective leaf area of ​​the branches was reduced, the fruit setting rate was decreased, the tree growth was unbalanced, and the fruit yield and quality were poor.
Inferior shoots that are too fine in the lower part have poor maturity, no flower buds, and no results. In order to enhance the lower ventilation and light transmission, it should also be removed.
The following points should be noticed in the process of thinning: 1 The upper part is sparse and the lower part is sparse, so as to control the strong and weak, and form a more reasonable spindle-shaped tree structure. 2 The secondary branches with high maturity and good flower bud quality can be properly retained to increase the result area and increase the yield. (3) When the height of the tree is not enough, a relatively upright branch can be selected from the top to serve as the central leader, and the middle section can be used as the extension head to timely pick the heart and reach the new shoot when reaching the height requirement. 4 Spray a fungicide after pruning, such as 5 degrees lime sulfur Baume, "9281" 100 ~ 150 times liquid, 100 ~ 150 times solibar liquid, etc., in order to prevent clipping is infected with bacteria.

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