The weather is getting colder and colder, and more and more fruit farmers have started the annual winter pruning of fruit trees.
The pruning time of fruit trees in winter is generally from after fruit dropping to before germination, that is, 165438+ 10 to February of the following year. At this time, the fruit trees are dormant, and the pruning effect is the best.
There are many skills in fruit tree pruning, which can be summarized in ten words: thinning, cutting, injury, modification, release, knowledge, watching, cutting, inspection and treatment.
If we can follow these ten words in the process of fruit tree pruning, it will be of great help to the growth, shape and yield of fruit trees.
disperse
Thinning refers to removing useless parts, such as combing flowers, thinning fruits, thinning branches and buds. Thinning can reduce the density of branches in the crown and avoid the formation of "trees on trees" by upright branches on the back.
Improve the ventilation and light transmission conditions in the crown, enhance the photosynthetic capacity of leaves, promote the healthy growth of the rest, enrich branches and buds, and promote flower bud differentiation and fruit development.
Cherishing vigorous branches or branches can weaken their strength and balance the tree potential. By thinning different types of branches, the ratio of leaves to buds and the number of flowers and fruits can be adjusted.
incision
Cutting refers to cutting off the annual part, also called short cutting. According to different branching conditions, short branches can be divided into light branches, middle branches, heavy branches and extremely heavy branches.
Because the short joint shortens the branch axis, it can increase the density of the branch tip and weaken the light in the crown cavity.
When cutting short, the growth potential of branches can be adjusted by changing the quality and orientation of buds and the angle and direction of branches. Using short section can also control the growth of crown and branches and reduce crown.
harm
Injury refers to the cross-cutting of branches of fruit trees during dormancy, which can hinder the upward transportation of nutrients stored in roots, make the buds at the lower part of the wound get enough nutrients, and promote the germination and germination of branches.
If the wound is cut under the bud in summer, it will prevent the downward transport of carbohydrates and improve the quality of the upper bud of the wound. The foreskin is to prevent nutrients from being transported downwards, thus improving the fruit setting rate.
change
Change refers to changing the growth direction of branches, such as pulling branches and taking branches, which are all "changes", mainly changing the growth direction of branches, thus weakening the top advantage, improving the germination ability and promoting the formation of flower buds.
In addition, branch pulling can also increase branch angle, improve photosynthetic conditions and improve photosynthetic efficiency of leaves.
Pruning has the functions of slowing down growth potential, promoting nutrient accumulation, improving germination rate, promoting the formation of short and medium branches and flower buds, and also has the function of opening young branches.
let go
Without pruning branches, putting fingers can slow down the tip advantage, promote the germination of buds at the lower part of branches, improve the germination rate and relieve the branch potential, because there is no wound and stimulation.
Stopping the growth of branches in advance is beneficial to the formation and fruiting of flower buds, and can promote the early fruiting of young trees and flourishing trees that should bear fruit but not bear fruit.
Shrinking-shrinking refers to cutting off the perennial part, which can promote the germination of latent buds and the growth of branches behind the incision, and has a strong weakening effect on the mother branches. Retraction plays a dual role in promoting and weakening growth.
know
To know is to know, understand and master the necessary operating procedures and techniques, growth habits, growth conditions and their special requirements. Most fruit trees can be pruned, but some details need to be grasped and controlled by yourself.
look
Watching is observing. The plant protection teacher of Green Boat has always talked about "adapting to local conditions", that is, making a pruning plan according to his own situation.
scissors
Pruning is necessary, symptomatic pruning, from top to bottom, first inside and then outside, first big and then small.
cheque
Inspection means timely inspection, because there will inevitably be omissions and mistakes in operation. Check and correct in time at this time.
place
The focus is on treatment, pruning as needed, symptomatic pruning, from top to bottom, from inside to outside, from big to small. The treatment of fruit tree pruning should protect the wound, protect the trunk and clean up the park.