Method for moderate trimming wood sided branches in forest

Abstract

The invention is concerned with the middle-degree pruning method for lateral branch, the characteristic is: the woods is the crown closure period or near crown closure when the anaphase young growth and the incipient period half-mature forest, process the middle-degree pruning to the lateral branch (expect the 1 to 2 years top branch, namely pruning of the 1 / 3 to 2 / 3. After three years and the first pruning, the forest enters the crown closure period or near crown closure again, processes the pruning again until the forest enters the anaphase of the half-mature forest. The invention can extend the space between the crowns of the tree, improves the light irradiation state and the light energy utilization ratio.

Description

technical field

[0001] The invention relates to a method for pruning woody plants, in particular to a method for moderately pruning side branches of trees and promoting the growth of trunks. Background technique

[0002] Tree pruning, usually by cutting off part of the branches. The purpose of pruning is to obtain a good tree structure to adjust light, distribute nutrients reasonably, balance tree vigor, and increase yield. Among them, the pruning of fruit trees and economic forests is to increase the output of fruits and other products; the pruning of timber forests is aimed at increasing the output of the trunk part—that is, the volume of timber.

[0003] The intensity of tree pruning is divided into three levels: light pruning - the cut part ≤ 1 / 3 of the branch length; moderate pruning - the cut part accounts for 1 / 3 to 2 / 3 of the branch length; heavy pruning - - The part cut off is ≥ 2 / 3 of the length of the branch.

[0004] Pruning is commonl...

Examples

Embodiment 1

[0026] Moderate pruning was carried out on Kudingcha (I. latifolia) ecological public welfare forest.

[0027] 1. General situation of trees: 10-year-old Kudingcha ecological public welfare forest, canopy density 0.9, density 240 trees / mu.

[0028] 2. Pruning In late March, moderate pruning was carried out on the tree. Except for the tip of the tree (1 meter), all the thicker side branches were cut off by about 1 / 2 from the upper end on average. After pruning, the longitudinal section of the canopy is trapezoidal, and the intersection angle at the bottom is about 85°.

[0029] 3. Thinning Cut off the weak branches and overly dense overlapping branches of pests and diseases.

[0030] 4. Tendency management Normal tending measures should not be less (including thinning tending), and fertilizer and water management should be strengthened.

[0031] The Kudingcha ecological public welfare forest has been moderately pruned twice in a row. When it is 16 years old, the average growt...

Embodiment 2

[0033] Moderate pruning of side branches of Chinese fir (C.lanceolata) timber forest.

[0034] 1. Tree general situation 8-year-old Chinese fir timber forest, afforestation density 300 trees / mu, canopy density 0.85.

[0035] 2. Pruning In late February, cut off about 1 / 3 of all first-level side branches (except the one-year-old part of the treetop) from the top on average.

[0036] 3. Cultivation management is the same as embodiment one.

[0037] After two times of moderate pruning, the standing stock volume per mu of the Chinese fir forest increased by 18.5% compared with the control group when it was 14 years old.

[0038] Notes:

[0039] 1. Canopy light-receiving area The area outside the canopy (surface) that receives sunlight.

[0040] 2. Canopy daylighting coefficient The ratio of the canopy light-receiving area to the land area. It can be expressed by the following formula:

[0041] R=As / al

[0042] Among them, R-canopy lighting coefficient, As-canopy light-receiv...

technical field

[0001] The invention relates to a method for pruning woody plants, in particular to a method for moderately pruning side branches of trees and promoting the growth of trunks. Background technique

[0002] Tree pruning, usually by cutting off part of the branches. The purpose of pruning is to obtain a good tree structure to adjust light, distribute nutrients reasonably, balance tree vigor, and increase yield. Among them, the pruning of fruit trees and economic forests is to increase the output of fruits and other products; the pruning of timber forests is aimed at increasing the output of the trunk part—that is, the volume of timber.

[0003] The intensity of tree pruning is divided into three levels: light pruning - the cut part ≤ 1 / 3 of the branch length; moderate pruning - the cut part accounts for 1 / 3 to 2 / 3 of the branch length; heavy pruning - - The part cut off is ≥ 2 / 3 of the length of the branch.

[0004] Pruning is commonl...

Examples

Embodiment 1

[0026] Moderate pruning was carried out on Kudingcha (I. latifolia) ecological public welfare forest.

[0027] 1. General situation of trees: 10-year-old Kudingcha ecological public welfare forest, canopy density 0.9, density 240 trees / mu.

[0028] 2. Pruning In late March, moderate pruning was carried out on the tree. Except for the tip of the tree (1 meter), all the thicker side branches were cut off by about 1 / 2 from the upper end on average. After pruning, the longitudinal section of the canopy is trapezoidal, and the intersection angle at the bottom is about 85°.

[0029] 3. Thinning Cut off the weak branches and overly dense overlapping branches of pests and diseases.

[0030] 4. Tendency management Normal tending measures should not be less (including thinning tending), and fertilizer and water management should be strengthened.

[0031] The Kudingcha ecological public welfare forest has been moderately pruned twice in a row. When it is 16 years old, the average growt...

Embodiment 2

[0033] Moderate pruning of side branches of Chinese fir (C.lanceolata) timber forest.

[0034] 1. Tree general situation 8-year-old Chinese fir timber forest, afforestation density 300 trees / mu, canopy density 0.85.

[0035] 2. Pruning In late February, cut off about 1 / 3 of all first-level side branches (except the one-year-old part of the treetop) from the top on average.

[0036] 3. Cultivation management is the same as embodiment one.

[0037] After two times of moderate pruning, the standing stock volume per mu of the Chinese fir forest increased by 18.5% compared with the control group when it was 14 years old.

[0038] Notes:

[0039] 1. Canopy light-receiving area The area outside the canopy (surface) that receives sunlight.

[0040] 2. Canopy daylighting coefficient The ratio of the canopy light-receiving area to the land area. It can be expressed by the following formula:

[0041] R=As / al

[0042] Among them, R-canopy lighting coefficient, As-canopy light-receiv...

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