Fruit tree pruning

The full-fruit tree refers to the tree after 7-8 years of age. During this period, the canopy expands slowly and gradually ceases. The vegetative growth and reproductive growth have become more balanced and gradually become more reproductive. With the increase of branch amount and a large number of results, the growth of new shoots weakened, and the lighting conditions in the crown deteriorated year by year. The growth of the tinea chinensis was declining year by year, and the result gradually shifted outward.

This period of apple tree pruning is mainly to adjust the skeleton structure, solve group lighting, control the amount of branches, improve the quality of the result branches, maintain the robustness of the tree, and focus on achieving high quality and stable production of fruit trees.

(I) Maintain a good tree structure

A good tree structure refers to a complete crown, coordinated growth of all kinds of branches, and an appropriate proportion. The ratio of the position of the central leadership branch, the main branch and the base of the branch to the position of the coarseness is 9:3:1.

(B) Maintaining good lighting conditions

The main branch angle is maintained around 80. Timely and happy to drop head, remove strong stems or dense branches in the upper part of the trunk, open the light path to solve the upper light, remove the strong twigs on the outside of the crown or stand on the back and cross the branches on both sides to suppress the result. Move parts outward to solve side lighting; then remove rough legs from round stem, parallel, overlapping branches or branches, solve local light, and apply scissor healing agent in time so that cuts can heal and prevent germs. Infection. In winter pruning, the amount of mu branches should be adjusted to about 80,000, and the amount of mu branches in the growing season should be controlled to about 120,000.

(III) Maintaining the result of strong branch

The results of the free-spindle pod-shaped tree group should be based on the small and medium-sized branch, in particular, the main branch of the upper crown and the periphery of the base branch should be more. Even the result of the middle and back branches of the main branch should not be too large. With the growth of tree age and relaxation of tree vigor, the branches and branches are also stable and gradually weaken. At this time, one is to remove some small twigs with relatively small growth and weakness in time; the other is to remove some of the weak branches on the twigs; the third is that the age of the rewinders is old, the performance is degraded, the extension is too long, and the space is small. The weak branches.

(D) maintain a strong tree potential

On the basis of strengthening soil and fertilizer water management and pest and disease control, one is to timely eliminate thin and weak branches and useless leggy branches; the other is to retract slender and weak branches and some debilitating branches in time; and third, to maintain the tree. The body is reasonably loaded with 1200 to 15,000 acres per mu, and 2500 to 3,000 kg per mu.

The standard of robust tree vigor is about 30 centimeters in length of peripheral shoots and clear gaps in the spring and autumn shoots. The branches in the crown are thick, with about 45% of the number of short branches, and the flowering branch rate is about 30%.

Tetrabromobisphenol A CAS No.79-94-7

Tetrabromobisphenol A Basic Information
Product Name: Tetrabromobisphenol A
CAS: 79-94-7
MF: C15H12Br4O2
MW: 543.87
EINECS: 201-236-9
Mol File: 79-94-7.mol

Tetrabromobisphenol A Structure

tetrabromobisphenol a,tetrabromobisphenol a msds,tetrabromobisphenol a (tbbpa),tetrabromobisphenol a bis (2 3-dibromopropyl ether),tetrabromobisphenol a bis

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