According to the author's investigation, there are currently many problems in the apple orchard winter shears, and the current situation is summarized as follows for reference.
I. Improper selection of trees, dense planting of trees by thinning tree
The specific performance is that the dryness is too low; the three main branches are selected to stay at the base; the main branches are left with too many, too large lateral branches and deputy lateral branches; the main branches are prolonged and the lateral branches are too large; The consequence is that the tree-trend has not yet formed, the distance between rows and rows has been closed, the conditions of ventilation and light transmission are poor, the results can not be delayed or the yield is low.
In winter, the younger ones were changed to a small crown-shaped plastic pruning method, and the spring and winter seasons were dominated by buds. Older interlaced or septal transplants. Retain the tree to reduce the number of collaterals, retract the collaterals or fruiting groups, and do not leave the collaterals again. The major branches on the head of the stem were removed and the main branch was extended to stop short. The branch between the plants uses the upper and lower, left and right methods to change heads, staggering the growth direction. Grab the opportunity of the New Year, and then retreat after seeing fruit. Remember, the young tree can not move too much, otherwise it is a tree in the coming year.
Second, leaving too many branches too messy
The concrete manifestation is a disorderly tree structure, with no distinction between the primary and the secondary; a round-stemmed branch with a severe card neck; a large branch with a severe cross and a bald posterior. The consequence is that the tree is left to grow, and the central government is weak or severely skewed.
When winter cutting, according to their own planting density, re-definition of the tree shape, and then according to the requirements of the tree, determine the main branch, the main branch of the angle, orientation adjustment and selection, and then deal with the main branch beyond the branch. If you choose to keep your branches, remove the whip sticks that have few branches, fewer flower buds, and uniaxial extension each year. The result of the branch that does not affect the growth of the main branch is temporarily used for the results, and then gradually removed or retracted in stages and in batches.
Three, trim too heavy
The specific performance for the short year after year, resulting in more than a full tree; no timely pull, support, twist, take, branches mostly upright.
The consequence is that the result area is moved forward and upward, the lower part of the tree, bald guilt, large canopy, low yield, and poor fruit quality.
During winter cutting, the excessive or useless branches are mainly sparse, and the angle of the branches is reduced as much as possible under the shearing. Each year, the method of supporting, pulling and hanging is adopted in spring and autumn, and girdling is adopted in summer. Means to control prosperous, in order to slow down the promotion of flowers, with fruit pressure.
Fourth, the tree is super large
The specific performance of the medium-density orchard after the use of sparse layer shaping, failed to fall quickly happy, crown lost control, high and large.
The consequence is that after the tree enters the full fruit period, the trees are closed and the canopy is closed. The inner guild and the lower tier rarely see light, resulting in the crowning result and the peripheral result becoming the “empty tree†where the “full trees fail to produceâ€.
When large-year winter cuts, large branches other than 1 to 2 main branches are eliminated, and large branches with severe shading on the upper part are also to be removed. For other branches, only the branches are not cut back; the appropriate part is selected to fall out of place and care is taken to cultivate a compact result. Through retraction, evacuation to solve the problem of light illumination within the guilt, so that the result site is stable in the middle of the crown.
V. Improper configuration of sticks
The specific performance is based on the result of continuous uniaxial branch formation, resulting in loose branch groups, poor continuous results, and a weak body. The consequence is that tree output is not stable, and the magnitude of the increase and decrease is significant.
In winter, crops should be cultivated in a planned manner. Pruning requires not only the production of the next year, but also the preparation for the second and third years of production. For example, the winter cutting techniques such as the two-updating and the three-updating renewal of the fruit shoots can all solve this problem.
Cable Reel,Water Hose Reel,Water Hose Cable Reel,Commercial Water Hose Reel
NINGBO QIKAI ENVIRONMENTAL TECHNOLOGY CO.,LTD , https://www.hosereelqikai.com