CN106416923A - Good-site cyclobalanopsis glauca broadleaf mixed forest based felling method - Google Patents
Good-site cyclobalanopsis glauca broadleaf mixed forest based felling method Download PDFInfo
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- CN106416923A CN106416923A CN201610842515.5A CN201610842515A CN106416923A CN 106416923 A CN106416923 A CN 106416923A CN 201610842515 A CN201610842515 A CN 201610842515A CN 106416923 A CN106416923 A CN 106416923A
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G23/00—Forestry
- A01G23/02—Transplanting, uprooting, felling or delimbing trees
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
- G06Q50/02—Agriculture; Fishing; Mining
Abstract
The invention relates to a secondary forest felling method, in particular to a good-site cyclobalanopsis glauca broadleaf mixed forest based felling method. The method includes the following steps: (1) conducting an investigation on a selection felling forest stand, and determining trees with the diameter at breast height being over 24cm and reaching the felling target diameter in the forest stand for selection cutting; (2) making statistics on trees with the diameter at breast height being over 5cm in the to-be-felled forest stand, and calculating the average diameter at breast height; (3) preliminarily marking the trees reaching the felling target diameter at breast height; (4) making statistics on number of maintained trees and calculating average diameter at breast height of the maintained trees; (5) selecting reasonable number of the maintained trees after felling according to the average diameter at breast height of the maintained trees according to the following table; (6) adjusting the trees with the to-be-felled target diameter at breast height to make the number of the maintained trees conform to the standards of the above table, and then performing felling. The method is applied to felling of good-site cyclobalanopsis glauca broadleaf mixed forests, operation is simple and accurate, and waste of vast forest resources can be reduced.
Description
Technical field
The present invention relates to the felling method of scondary forest, and in particular to a kind of based on preferably on the spot Qinggang oak Broad-leaved Mixed Forest
Felling method.
Background technology
The 8th forest inventory investigation of China：1.22 hundred million hectares of wildwood area, accounts for the 64% of forest land area, accumulation
122.96 billion cubic meters, account for the 83% of management volume, and wildwood is the main body of China's Forest Resources；Wildwood include primary forest and
Scondary forest, scondary forest refers to forest of the primary forest through being formed after artificial disturbance or natural disturbance, and current China is most
Wildwood is present with the state of scondary forest.
In the natural high forest main advantage seeds in the whole nation, 16,100,000 hectares of species ofoak area, area compares 13.70%, stores
12.81 billion cubic meters of product, accumulation compares 10.42%, and either area is still accumulated all to arrange and belongs to national first big dominant tree.
Qinggang oak (Cyclobalanopsis glauca) is also referred to as " thick wood ", is divided into according to wood color " red thick " and " white
Thick ".In history, " Camphor tree, Chinese catalpa, nanmu, " and be referred to as " south of the River four big name wood ", particularly " nanmu, " because the hard weight of its timber strong, strong
Degree is big, color and luster, texture are beautiful, durable corrosion resistant and famous and precious.Qinggang oak is Precious Timber Species, lists in《National strategy deposit tree
Plant catalogue》.
China does not have the felling method of science to Qinggang oak scondary forest at present, is all to fell by rule of thumb, random larger, because
And low production efficiency, waste the substantial amounts of forest reserves.
Content of the invention
Above-mentioned in order to overcome the shortcomings of prior art, the present invention provides a kind of based on preferable on the spot Qinggang oak Broad-leaved Mixed Forest
Felling method, comprise the steps：
(1) investigate to cutting standing forest selectively, determine that standing forest has more than diameter of a cross-section of a tree trunk 1.3 meters above the ground 24cm, the forest for felling aimed dia is reached,
Selection method can be carried out；
(2) statistics treats that deforestation divides the forest of more than middle diameter of a cross-section of a tree trunk 1.3 meters above the ground 5cm, and calculates mean DBH increment；
(3) tentatively marked to reaching the forest for felling the target diameter of a cross-section of a tree trunk 1.3 meters above the ground；
(4) count the strain number of reserve and calculate the mean DBH increment of reserve；
(5) the reasonable reservation strain number after felling selects to carry out according to the mean DBH increment according to the form below of reserve：
(6) step (3)-(4) are pressed, the forest for treating the felling target diameter of a cross-section of a tree trunk 1.3 meters above the ground is adjusted, and makes reservation strain number meet step
(5) standard of inner upper table, then fells.
Another preferred version of the present invention is that the Canopy densities of step (1) selective cutting standing forest are more than 0.7.
Another preferred version of the present invention is that after step (5) is felled, mean DBH increment footpath rank is 1300 for the reserve of 10cm
± 5% plant/hectare.
Another preferred version of the present invention is that after step (5) is felled, mean DBH increment footpath rank is for the reserve of 12-14cm
1100 ± 5% plants/hectare.
Another preferred version of the present invention is that after step (5) is felled, mean DBH increment footpath rank is for the reserve of 16-18cm
750 ± 5% plants/hectare.
Another preferred version of the present invention is that after step (5) is felled, mean DBH increment footpath rank is for the reserve of 20-22cm
680 ± 5% plants/hectare.
Another preferred version of the present invention is that after step (5) is felled, mean DBH increment footpath rank is for the reserve of 24-26cm
600 ± 5% plants/hectare.
Another preferred version of the present invention is that after step (5) is felled, mean DBH increment footpath rank is for the reserve of more than 26cm
500 ± 5% plants/hectare.
Compared with prior art, advantage of the invention is that：
(1) site type determines selective cutting wood by Qinggang oak diameter of a cross-section of a tree trunk 1.3 meters above the ground size respectively, that is, cut the determination of wooden aimed dia selectively, determine
The method of the diameter of a cross-section of a tree trunk 1.3 meters above the ground is simple, accurate.(2) by standing forest intend selective cutting after footpath level scope determine reserve through level strain number, this method
Operation is simple, accurately.
Description of the drawings
Fig. 1 is Qinggang oak increment curve chart of preferable site type.
Fig. 2 is Qinggang oak increment curve chart of medium site type.
Specific embodiment
The preferred embodiment of the present invention presented below, to help further understanding the present invention, but the protection model of the present invention
Enclose and be not limited in these embodiments.
1st, Qinggang oak scondary forest fells method proposition, the purpose and meaning of invention
As scondary forest Mixed effect is more, forest size, height difference are big；While age composition complexity, Secondary Forest
The forest in overdone age is become in young growth, middle-aged forest and closely to have in point, it is impossible to as Artificial Pure of the same age, standing forest maturation
When, implement full woods clear cutting system.And need to be cut selectively, selective cutting is exactly to fell a part closely to become overdone age forest.Usually, woods
Whether wood ripe, be using the analytic tree analysis increase in standing timber size with change of age relation, by age determining, i.e. forest
Maturity age.Due to field logging operation, for the scondary forest of natural origin, it is difficult to determine the age for felling object, while secondary
Raw woods maturation age is also affected by land occupation condition, and land occupation condition is relatively good, and maturation is relatively earlier.Followed by retain strain number really
Fixed, when standing forest is felled, how to determine reservation strain number.The problem that this method is solved can be felled for (1) ripe or near maturation
The determination of Qinggang oak felled tree of operation；(2) when felling, the determination of the reservation strain number that cyclobalanopsis gleuca divides.The felling side of the present invention
Method is just to determine this two technology essential factors.This method is workable, has very extensive promotional value.
Its content of the invention：(1) site type determines selective cutting wood by Qinggang oak diameter of a cross-section of a tree trunk 1.3 meters above the ground size respectively, that is, cut wooden aimed dia selectively
Determination, the method for determining the diameter of a cross-section of a tree trunk 1.3 meters above the ground is simple, accurate.(2) by standing forest intend selective cutting after footpath level scope determine reserve through level strain
Number, this method operation is simple, accurately.
2nd, the theoretical foundation of method
(1) division of site type
On forestry, usually Judging The Type of Forest Site is divided into three major types：Preferable site type, medium site type, poor
Site type.
Qinggang oak is the top constructive species in Subtropical Evergreen Broad-leaf Forest, and Bioclimatic analysis are wide, are distributed on the south the Qinling Mountains to China
South, Xi Daxizang, strong adaptability, acid basement rock can be all grown with alkaline basement rock, form single dominantcommunity, seeds in Limestone Mountain
Resistance to shade, likes warm humid climate, has certain tolerance to cold, and ecological amplitude is very wide, grows middling speed, and rudiment power is strong, and natural regeneration is vigorous.
Therefore, the site type for investigating the secondary sample ground of Qinggang oak is classified.
(a) preferably site type：Plate shale class, below height above sea level 600m, thickness of soil more than 80cm.
(b) medium site type：Lime rock or plate shale class, height above sea level 600m-1200m thickness of soil 41-80cm.
(c) poor site type：Site type beyond front two class, as land occupation condition is poor, after forest is felled, standing forest is given birth to
Long, update bad, easily cause artificial destruction；Therefore typically unreal alms giver cuts down operation, therefore, this method do not discuss this kind of on the spot
The felling method of Qinggang oak under type condition.
(2) correlation analysiss of Qinggang oak age and breast diameter growth
Choose the analytic tree under two class land occupation conditions respectively, the regression analyses of the diameter of a cross-section of a tree trunk 1.3 meters above the ground and age are carried out with SPSS software,
Judge related significance degree, if related notable, it is possible to which the index that this directly can determine with the diameter of a cross-section of a tree trunk 1.3 meters above the ground is expressing felling
The forest age of accurate judgement, Qinggang oak age and breast diameter growth analog result such as following table under two class land occupation conditions is difficult to during operation
1.
The fitting result unit of 1 analytic tree age of table and breast diameter growth：Year；Centimetre
In table under two class site types, the correlation coefficient of situational variables all reaches more than 0.9, significantly correlated；Therefore permissible
Replace the age with the forest diameter of a cross-section of a tree trunk 1.3 meters above the ground as the foundation of scondary forest maturation.
(3) determination of the target diameter of a cross-section of a tree trunk 1.3 meters above the ground
The target diameter of a cross-section of a tree trunk 1.3 meters above the ground refers to that seeds reach the diameter of a cross-section of a tree trunk 1.3 meters above the ground that can carry out when final felling is utilized, and forest is felled and utilizes most important one
Individual on condition that forest reaches maturation.The aimed dia of each different tree species is different and different with lumber quality because of economic criterion,
While will also be adjusted in conjunction with wood usage difference.
By forestry theory, the ripe requirement of forest is that the quantity increment of forest reaches relative maximum, and Fig. 1 and Fig. 2 are
The growth increment analysis figure of Qinggang oak analytic tree.Fig. 1 is Qinggang oak increment curve chart of preferable site type.Fig. 2 is medium vertical
Qinggang oak increment curve chart of ground type.
When understanding Qinggang oak maturation under preferable site type, the forest diameter of a cross-section of a tree trunk 1.3 meters above the ground is that (now Current annual increment reaches 34cm
Maximum)；
When Qinggang oak under medium site type is ripe, the forest diameter of a cross-section of a tree trunk 1.3 meters above the ground is that (now Current annual increment reaches most 28cm
Greatly).
And forest can be described as nearly mature forest from current annual increment maximum to the average increment maximum period, if special
Do not need, it is also possible to which application is felled.
Therefore, preferably under site type, the target diameter of a cross-section of a tree trunk 1.3 meters above the ground that Qinggang oak is felled is [24cm-34cm] more than.
Under medium site type, the target diameter of a cross-section of a tree trunk 1.3 meters above the ground that Qinggang oak is felled is [18cm-28cm] more than.
Under the conditions of preferable or medium site type, the felled tree that cyclobalanopsis gleuca divides can be according to aimed dia
Standard is determined, and assay method is simple and reliable.
(4) after Qinggang oak is felled, forest retains the determination of strain number
After standing forest is felled, the conserved density of standing forest has certain requirement, that is to say, that heaviness of felling is unsuitable excessive, it is impossible to
All meet all adopting to the greatest extent for target diameter of a cross-section of a tree trunk 1.3 meters above the ground standard, be so unfavorable for Stand Growth with renewal.Usually heaviness of felling control is retaining
Canopy density 0.58-0.68.And canopy density are a qualitative method, it is difficult in practice to hold.
This method determines royal tree strain number according to the quantitative relation between the growth of standing forest and standing tree, that is, determine standing forest
Density.
A () determines the related law of the diameter of a cross-section of a tree trunk 1.3 meters above the ground and hat width
In standing forest, the area sum of forest hat width and the ratio of standing forest area are Canopy densities.The size of range of tree-crown,
The size of per plant of Forest Tree Nutrient area of reflection, very big on growth in thickness impact, general hat width is bigger, and the diameter of a cross-section of a tree trunk 1.3 meters above the ground is thicker, shared nutrition
Area is also bigger, and growth in thickness is not affected by land occupation condition with the relation of hat width size.This has been investigated 1780 plants of diameters of a cross-section of a tree trunk 1.3 meters above the ground and has existed
The crown width of Qinggang oak Broad-leaved Mixed Forest of 5-40cm footpath level and the diameter of a cross-section of a tree trunk 1.3 meters above the ground, set up returning for hat width and the diameter of a cross-section of a tree trunk 1.3 meters above the ground using method of least square
Return equation：
CW=1.305+0.143D-0.001D2
Coefficient R=0.856
In formula：CW hat width；Unit：Rice；
The D diameter of a cross-section of a tree trunk 1.3 meters above the ground；Unit：Centimetre.
Equally, crown width and the diameter of a cross-section of a tree trunk 1.3 meters above the ground of Qinggang oak needle mixed forest of 1500 plants of diameter of a cross-section of a tree trunk 1.3 meters above the ground 5-40cm footpath levels have been investigated, profit
The regression equation of hat width and the diameter of a cross-section of a tree trunk 1.3 meters above the ground is set up with method of least square：
CW=1.922+0.153 D-0.001 D2
Coefficient R=0.827
B () retains the determination of strain number
According to above-mentioned equation, the hat width theoretical value of the different diameters of a cross-section of a tree trunk 1.3 meters above the ground is obtained, and after felling, Canopy densities should be retained in
0.58-0.68, so that it is determined that go out the reasonable strain number scope that Qinggang oak scondary forest should retain, such as table 2 in the different diameter of a cross-section of a tree trunk 1.3 meters above the ground stages
2 Qinggang oak scondary forest of table rationally retains strain number table (± 10% allow excursion) after felling
Unit：Centimetre, plant/hectare
3rd, concrete application
A () preferable site type, Qinggang oak broad-leaved mix the felling method of friendship：
The first step, standing forest have more than a 24cm forest, closing of crop, can carry out selection method, and not kairine window after felling；
Second step, investigate to cutting standing forest selectively, the diameter of a cross-section of a tree trunk 1.3 meters above the ground for recording the above forest of diameter of a cross-section of a tree trunk 1.3 meters above the ground 5cm is simultaneously numbered；
3rd step, the forest to needing more than the 24cm of selective cutting are tentatively marked；
If the 4th step fells the forest of mark, then calculate the mean DBH increment of reserve (for example：The reserve diameter of a cross-section of a tree trunk 1.3 meters above the ground
16cm), synopsis 2, require to be felled by the forest of mark if (750 ± 10%) if meeting reserve strain number；If no
Meet then and enter the 5th step；
5th step：If the reservation strain number for calculating is not in the range of table 2, it is assumed that calculate maximum of the strain number more than table 2, then
Illustrate that the plan harvest of forest trees being labeled is on the low side, need appropriate increase to mark, repeat the 4th step；Until reaching reserve strain number model
Enclose the requirement of table 2, it is possible to felled by the numbering of mark.
Using this method, Qinggang oak Broad-leaved Mixed Forest in the preferable site type forest zone in Suining County of Hunan Province is felled：
(1) investigate to cutting standing forest selectively, determine that standing forest has more than diameter of a cross-section of a tree trunk 1.3 meters above the ground 24cm, Canopy densities are more than 0.7, to reach
The forest of aimed dia is felled, selection method can be carried out,
(2) statistics treats that deforestation divides the forest of more than middle diameter of a cross-section of a tree trunk 1.3 meters above the ground 5cm, and calculates mean DBH increment；(3) to reaching, target breast is felled
The forest in footpath is tentatively marked；
(4) count the strain number of reserve and calculate the mean DBH increment of reserve；
(5) the reasonable reservation strain number after felling selects to carry out that (allowable error is according to the mean DBH increment according to the form below of reserve
± 5%)：
(6) step (3)-(4) are pressed, the forest for treating the felling target diameter of a cross-section of a tree trunk 1.3 meters above the ground is adjusted, and makes reservation strain number meet step
(5) standard of inner upper table, then fells.
Felled before this county by rule of thumb, the measure that takes is to close hillsides to facilitate afforestation, forbid felling, then treat forest zone timber reserves
Cut down by rule of thumb when reaching 300 ten thousand stere again, the time is wasted, also result in the waste of forest tree resource.Forest zone is ripe latter 10 years
Accumulation mill run is about 600 ten thousand steres.And after adopting the method for the present invention, due to entering to reserve strain number and reserve footpath rank
The design of science is gone, the accumulation mill run of 5 years just alreadys exceed 600 ten thousand steres, it is seen that the method for the present invention is with respect to biography
System method had both been saved the time, improve mill run again.
B () preferable site type, Qinggang oak needle mix the felling method of friendship：
The first step, standing forest have more than a 24cm forest, closing of crop, can carry out selection method, and not kairine window after felling；
Second step, investigate to cutting standing forest selectively, the diameter of a cross-section of a tree trunk 1.3 meters above the ground for recording the above forest of diameter of a cross-section of a tree trunk 1.3 meters above the ground 5cm is simultaneously numbered；
3rd step, the forest to needing more than the 24cm of selective cutting are tentatively marked；
If the 4th step fells the forest of mark, then calculate the mean DBH increment of reserve (for example：The reserve diameter of a cross-section of a tree trunk 1.3 meters above the ground
16cm), synopsis 2, require to be felled by the forest of mark if (820 ± 10%) if meeting reserve strain number；If no
Meet then and enter the 5th step；
5th step：If the reservation strain number for calculating is not in the range of table 2, it is assumed that calculate maximum of the strain number more than table 2, then
Illustrate that the forest that the plan being labeled is felled is on the low side, appropriate increase mark is needed, repeats the 4th step；Until reaching reserve strain number
The requirement of range table 2, it is possible to felled by the numbering of mark.
Using this method, Qinggang oak needle mixed forest in the preferable site type forest zone in Suining County of Hunan Province is felled：
(1) investigate to cutting standing forest selectively, determine that standing forest has more than diameter of a cross-section of a tree trunk 1.3 meters above the ground 24cm, Canopy densities are more than 0.7, to reach
The forest of aimed dia is felled, selection method can be carried out,
(2) statistics treats that deforestation divides the forest of more than middle diameter of a cross-section of a tree trunk 1.3 meters above the ground 5cm, and calculates mean DBH increment；
(3) tentatively marked to reaching the forest for felling the target diameter of a cross-section of a tree trunk 1.3 meters above the ground；
(4) count the strain number of reserve and calculate the mean DBH increment of reserve；
(5) the reasonable reservation strain number after felling selects to carry out that (allowable error is according to the mean DBH increment according to the form below of reserve
± 5%)：
(6) step (3)-(4) are pressed, the forest for treating the felling target diameter of a cross-section of a tree trunk 1.3 meters above the ground is adjusted, and makes reservation strain number meet step
(5) standard of inner upper table, then fells.
This county forest zone, felled in the past by rule of thumb, and the measure that takes is to close hillsides to facilitate afforestation, and forbids felling, then treats forest zone timber
Accumulation is cut down when reaching 260 ten thousand stere again by rule of thumb, wastes the time, also results in the waste of forest tree resource.Forest zone maturation
10 years accumulation mill run are about 500 ten thousand steres afterwards.And after adopting the method for the present invention, due to reserve strain number and reserve
Footpath rank has carried out the design of science, and the accumulation mill run of 6 years just alreadys exceed 500 ten thousand steres, it is seen that method of the present invention phase
Traditional method was both saved the time, had improve mill run again.
C () medium site type, Qinggang oak broad-leaved mix the felling method of friendship：
The first step, standing forest have more than a 18cm forest, closing of crop, not kairine window after can carrying out selection method and felling；
Second step, investigate to cutting standing forest selectively, the diameter of a cross-section of a tree trunk 1.3 meters above the ground for recording the above forest of diameter of a cross-section of a tree trunk 1.3 meters above the ground 5cm is simultaneously numbered；
3rd step, the forest to needing more than the 18cm of selective cutting are tentatively marked；
If the 4th step fells the forest of mark, then calculate the mean DBH increment of reserve (for example：The reserve diameter of a cross-section of a tree trunk 1.3 meters above the ground
16cm), synopsis 2, require to be felled by the forest of mark if (750 ± 10%) if meeting reserve strain number；If no
Meet then and enter the 5th step；
5th step：If the reservation strain number for calculating is not in the range of table 2, it is assumed that calculate maximum of the strain number more than table 2, then
Illustrate that the forest that the plan being labeled is felled is on the low side, appropriate increase mark is needed, repeats the 4th step；Until reaching reserve strain number
The requirement of range table 2, it is possible to felled by the numbering of mark.
Using this method, Qinggang oak Broad-leaved Mixed Forest in the medium site type forest zone in Pingjiang county Hunan province is felled：
(1) investigate to cutting standing forest selectively, determine that standing forest has more than diameter of a cross-section of a tree trunk 1.3 meters above the ground 18cm, Canopy densities more than 0.7, reach and adopt
The forest of aimed dia is cut down, selection method can be carried out,
(2) statistics treats that deforestation divides the forest of more than middle diameter of a cross-section of a tree trunk 1.3 meters above the ground 5cm, and calculates mean DBH increment；
(3) tentatively marked to reaching the forest for felling the target diameter of a cross-section of a tree trunk 1.3 meters above the ground；
(4) count the strain number of reserve and calculate the mean DBH increment of reserve；
(5) fell after reasonable reservation strain number according to the mean DBH increment according to the form below of reserve select carry out (allowable error ±
5%)：
(6) step (3)-(4) are pressed, the forest for treating the felling target diameter of a cross-section of a tree trunk 1.3 meters above the ground is adjusted, and makes reservation strain number meet step
(5) standard of inner upper table, then fells.
This county forest zone, felled in the past by rule of thumb, and the measure that takes is to close hillsides to facilitate afforestation, and forbids felling, then treats forest zone timber
Accumulation is cut down when reaching 200 ten thousand stere again by rule of thumb, wastes the time, also results in the waste of forest tree resource.Forest zone maturation
10 years accumulation mill run are about 370 ten thousand steres afterwards.And after adopting the method for the present invention, due to reserve strain number and reserve
Footpath rank has carried out the design of science, and the accumulation mill run of 5 years just alreadys exceed 370 ten thousand steres, it is seen that method of the present invention phase
Traditional method was both saved the time, had improve mill run again.
D () medium site type, Qinggang oak needle mix the felling method of friendship：
The first step, standing forest have more than 18cm forest, and closing of crop, can carry out selection method, and not kairine window after felling；
Second step, investigate to cutting standing forest selectively, the diameter of a cross-section of a tree trunk 1.3 meters above the ground for recording the above forest of diameter of a cross-section of a tree trunk 1.3 meters above the ground 5cm is simultaneously numbered；
3rd step, the forest to needing more than the 18cm of selective cutting are tentatively marked；
If the 4th step fells the forest of mark, then calculate the mean DBH increment of reserve (for example：The reserve diameter of a cross-section of a tree trunk 1.3 meters above the ground
16cm), synopsis 2, require to be felled by the forest of mark if (820 ± 10%) if meeting reserve strain number；If no
Meet then and enter the 5th step；
5th step：If the reservation strain number for calculating is not in the range of table 2, it is assumed that calculate maximum of the strain number more than table 2, then
Illustrate that the forest that the plan being labeled is felled is on the low side, appropriate increase mark is needed, repeats the 4th step；
Until reaching the requirement of reserve strain number range table 2, it is possible to felled by the numbering of mark.
Using this method, Qinggang oak needle mixed forest in the medium site type forest zone in Pingjiang county Hunan province is felled：
(1) investigate to cutting standing forest selectively, determine that standing forest has more than diameter of a cross-section of a tree trunk 1.3 meters above the ground 18cm, Canopy densities are more than 0.7, to reach
The forest of aimed dia is felled, selection method can be carried out,
(2) statistics treats that deforestation divides the forest of more than middle diameter of a cross-section of a tree trunk 1.3 meters above the ground 5cm, and calculates mean DBH increment；
(3) tentatively marked to reaching the forest for felling the target diameter of a cross-section of a tree trunk 1.3 meters above the ground；
(4) count the strain number of reserve and calculate the mean DBH increment of reserve；
(5) the reasonable reservation strain number after felling selects to carry out that (allowable error is according to the mean DBH increment according to the form below of reserve
± 5%)：
(6) step (3)-(4) are pressed, the forest for treating the felling target diameter of a cross-section of a tree trunk 1.3 meters above the ground is adjusted, and makes reservation strain number meet step
(5) standard of inner upper table, then fells.
This county forest zone, felled in the past by rule of thumb, and the measure that takes is to close hillsides to facilitate afforestation, and forbids felling, then treats forest zone timber
Accumulation is cut down when reaching 200 ten thousand stere again by rule of thumb, wastes the time, also results in the waste of forest tree resource.Forest zone maturation
10 years accumulation mill run are about 350 ten thousand steres afterwards.And after adopting the method for the present invention, due to reserve strain number and reserve
Footpath rank has carried out the design of science, and the accumulation mill run of 6 years just alreadys exceed 350 ten thousand steres, it is seen that method of the present invention phase
Traditional method was both saved the time, had improve mill run again.
Above-described embodiment is the present invention preferably embodiment, but embodiments of the present invention are not by above-described embodiment
Limit, other any spirit without departing from the present invention and the change that is made under principle, modification, replacement, combine, simplify,
Equivalent substitute mode is all should be, is included within protection scope of the present invention.
Claims (8)
1. a kind of felling method based on preferably on the spot Qinggang oak Broad-leaved Mixed Forest, it is characterised in that comprise the steps：
(1) investigate to cutting standing forest selectively, determine that standing forest has more than diameter of a cross-section of a tree trunk 1.3 meters above the ground 24cm, the forest for felling aimed dia is reached, can be entered
Row selection method,
(2) statistics treats that deforestation divides the forest of more than middle diameter of a cross-section of a tree trunk 1.3 meters above the ground 5cm, and calculates mean DBH increment；
(3) tentatively marked to reaching the forest for felling the target diameter of a cross-section of a tree trunk 1.3 meters above the ground；
(4) count the strain number of reserve and calculate the mean DBH increment of reserve；
(5) the reasonable reservation strain number after felling selects to carry out according to the mean DBH increment according to the form below of reserve：
(6) step (3)-(4) are pressed, the forest for treating the felling target diameter of a cross-section of a tree trunk 1.3 meters above the ground is adjusted, and makes reservation strain number meet step (5) inner
The standard of upper table, then fells.
2. felling method according to claim 1 based on preferably on the spot Qinggang oak Broad-leaved Mixed Forest, it is characterised in that step
(1) Canopy densities of selective cutting standing forest are more than 0.7.
3. felling method according to claim 1 based on preferably on the spot Qinggang oak Broad-leaved Mixed Forest, it is characterised in that step
(5) after felling, mean DBH increment footpath rank is 1300 ± 5% plants/hectare for the reserve of 10cm.
4. felling method according to claim 1 based on preferably on the spot Qinggang oak Broad-leaved Mixed Forest, it is characterised in that step
(5) after felling, mean DBH increment footpath rank is 1100 ± 5% plants/hectare for the reserve of 12-14cm.
5. felling method according to claim 1 based on preferably on the spot Qinggang oak Broad-leaved Mixed Forest, it is characterised in that step
(5) after felling, mean DBH increment footpath rank is 750 ± 5% plants/hectare for the reserve of 16-18cm.
6. felling method according to claim 1 based on preferably on the spot Qinggang oak Broad-leaved Mixed Forest, it is characterised in that step
(5) after felling, mean DBH increment footpath rank is 680 ± 5% plants/hectare for the reserve of 20-22cm.
7. felling method according to claim 1 based on preferably on the spot Qinggang oak Broad-leaved Mixed Forest, it is characterised in that step
(5) after felling, mean DBH increment footpath rank is 600 ± 5% plants/hectare for the reserve of 24-26cm.
8. felling method according to claim 1 based on preferably on the spot Qinggang oak Broad-leaved Mixed Forest, it is characterised in that step
(5) after felling, mean DBH increment footpath rank is 500 ± 5% plants/hectare for the reserve of more than 26cm.
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Citations (3)
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| CN104112161A (en) * | 2014-03-04 | 2014-10-22 | 北京林业大学 | Optimized calculation method for forest stand selective cutting amount based on electronic tree measurement gun |
| CN104834964A (en) * | 2015-02-05 | 2015-08-12 | 北京林业大学 | Optimal bucking method of forest selective felling |
| CN105354625A (en) * | 2015-10-12 | 2016-02-24 | 北京林业大学 | Method for realizing optimal forest selective cutting model |
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|---|---|---|---|---|
| CN104112161A (en) * | 2014-03-04 | 2014-10-22 | 北京林业大学 | Optimized calculation method for forest stand selective cutting amount based on electronic tree measurement gun |
| CN104834964A (en) * | 2015-02-05 | 2015-08-12 | 北京林业大学 | Optimal bucking method of forest selective felling |
| CN105354625A (en) * | 2015-10-12 | 2016-02-24 | 北京林业大学 | Method for realizing optimal forest selective cutting model |
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