CN106332730A - Felling method for cyclobalanopsis glauca coniferous mixed forest based on medium site - Google Patents
Felling method for cyclobalanopsis glauca coniferous mixed forest based on medium site Download PDFInfo
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
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Abstract
The invention relates to a felling method of secondary forests and particularly relates to a felling method for cyclobalanopsis glauca coniferous mixed forest based on medium site. According to the scheme, the felling method comprises the following steps of: (1) surveying selective felling forests, determining that the forest stand has the diameter at breast height being more than 18cm, and felling the woods achieving a target diameters; (3) primarily labeling the woods achieving the felling target diameter at breast height; (4) carrying out the number of plants of remained woods, and calculating the average diameter at breast height of the retained woods; (5) selecting felled reasonable retained number of plants according to the average diameter at breast height as following sheet shown in the description; and (6) according to step (3), adjusting the woods with target diameter at breast height to be felled so as to enable the retained number of plants to conform to the standard of the sheet, and then felling. The felling method is applied to the felling of cyclobalanopsis glauca coniferous mixed forest based on a medium site, the operation is simple, easy and accurate, and waste of a large quantity of woods 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 medium on the spot Qinggang oak needle mixed forest
Felling method.
Background technology
The 8th forest inventory investigation of China: 1.22 hundred million hectares of wildwood area, account 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 the forest through being formed after artificial disturbance or natural disturbance for the primary forest, and current China is most
Wildwood is existed 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
Long-pending 12.81 billion cubic meters, accumulation compares 10.42%, and either area is still accumulated all to arrange and belonged to national first big dominant tree.
Qinggang oak (cyclobalanopsis glauca) is also referred to as " thick wood ", is divided into " red thick " and " white according to wood color
Thick ".In history, " Camphor tree, Chinese catalpa, nanmu, " and referred to as " the big name in the south of the River four 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 " national strategy deposit tree in
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 one kind to be based on medium on the spot Qinggang oak needle mixed forest
Felling method, comprise the steps:
(1) selective cutting standing forest is investigated, determines that standing forest has more than diameter of a cross-section of a tree trunk 1.3 meters above the ground 18cm, reach the forest felling aimed dia,
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) forest reaching the felling target diameter of a cross-section of a tree trunk 1.3 meters above the ground 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 according to the mean DBH increment according to the form below of reserve:
(6) step (3)-(4) are pressed, the forest treating the felling target diameter of a cross-section of a tree trunk 1.3 meters above the ground is adjusted, and makes guarantor
Stay strain number to meet the standard of upper table, then fell.
Another preferred version of the present invention is that the Canopy densities that step (1) cuts standing forest selectively are more than 0.7.
Another preferred version of the present invention is that after step (5) is felled, the reserve for 10cm for the mean DBH increment footpath rank is 1400
± 5% plant/hectare.
Another preferred version of the present invention is that after step (5) is felled, the reserve for 12-14cm for the mean DBH increment footpath rank is
1200 ± 5% plants/hectare.
Another preferred version of the present invention is that after step (5) is felled, the reserve for 16-18cm for the mean DBH increment footpath rank is
820 ± 5% plants/hectare.
Another preferred version of the present invention is that after step (5) is felled, the reserve for 20-22cm for the mean DBH increment footpath rank is
770 ± 5% plants/hectare.
Another preferred version of the present invention is that after step (5) is felled, the reserve for 24-26cm for the mean DBH increment footpath rank is
680 ± 5% plants/hectare.
Another preferred version of the present invention is that after step (5) is felled, the reserve for more than 26cm for the mean DBH increment footpath rank is
560 ± 5% plants/hectare.
Compared with prior art, present invention has an advantage that
(1) site type presses Qinggang oak diameter of a cross-section of a tree trunk 1.3 meters above the ground size determination selective cutting wood respectively, that is, cut the determination of wooden aimed dia, mensure selectively
The method of the diameter of a cross-section of a tree trunk 1.3 meters above the ground is simple, accurately.(2) by standing forest intend selective cutting after footpath level scope determine reserve through level strain number, this method
Operation is simple, accurately.
Brief description
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 is felled method and is proposed, the purpose and meaning of invention
Because scondary forest Mixed effect is more, forest size, height difference are big；Age composition is complicated simultaneously, Secondary Forest
The forest being in young growth, middle-aged forest and nearly one-tenth overdone age in point has it is impossible to as Artificial Pure of the same age, standing forest is ripe
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 is ripe, is to analyze the size of the increase in standing timber with change of age relation using analytic tree, by age to determine, i.e. forest
Maturity age.Due to field logging operation, the scondary forest for natural origin is it is difficult to determine the age felling object, simultaneously 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 solves 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 presses Qinggang oak diameter of a cross-section of a tree trunk 1.3 meters above the ground size determination selective cutting wood respectively, that is, cut wooden aimed dia selectively
Determination, the method measuring the diameter of a cross-section of a tree trunk 1.3 meters above the ground is simple, accurately.(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: preferably 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, is distributed on the south the Qinling Mountains to China
South, Xi Daxizang, strong adaptability, acid basement rock all can grow with alkaline basement rock, forms single dominantcommunity, seeds in Limestone Mountain
Resistance to shade, likes warm humid climate, has certain tolerance to cold, ecological amplitude is very wide, grows middling speed, and rudiment power is strong, and natural regeneration is vigorous.
Therefore, the site type on the secondary sample ground of investigation 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: the site type beyond front two classes, because land occupation condition is poor, after forest is felled, standing forest is given birth to
Long, renewal is bad, easily causes 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, carry out the regression analyses of the diameter of a cross-section of a tree trunk 1.3 meters above the ground and age with spss software,
Judge related significance degree, if correlation is significantly it is possible to the index that this can directly measure with the diameter of a cross-section of a tree trunk 1.3 meters above the ground expresses felling
It is difficult to the forest age accurately judging, Qinggang oak age and breast diameter growth analog result such as following table under two class land occupation conditions during operation
1.
Table 1 analytic tree age and the fitting result unit of breast diameter growth: year；Centimetre
Under two class site types in table, 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 ripe foundation of scondary forest.
(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 utilizes, and forest is felled and utilizes most important one
Individual premise is that forest reaches maturation.The aimed dia of each different tree species is different and different with lumber quality because of economic criterion,
Also to be adjusted in conjunction with wood usage difference simultaneously.
Theoretical by forestry, the ripe requirement of forest is that the quantity increment of forest reaches relative maximum, Fig. 1 and Fig. 2 is
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 28cm
Greatly).
And forest, from current annual increment maximum to the average increment maximum period, can be described as nearly mature forest, if special
Do not need it is also possible to apply for felling.
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 more than [24cm-34cm].
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 more than [18cm-28cm].
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 have certain requirement that is to say, that heaviness of felling unsuitable excessive it is impossible to
All meet all adopting to the greatest extent of target diameter of a cross-section of a tree trunk 1.3 meters above the ground standard, be so unfavorable for Stand Growth and renewal.Usually heaviness of felling controls and is retaining
Canopy density 0.58-0.68.And canopy density are a qualitative method, it is difficult in practice to hold.
This method, according to the quantitative relation between the growth of standing forest and standing tree, determines royal tree strain number, 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 every 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 of 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
Correlation 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, the crown width of Qinggang oak needle mixed forest and the diameter of a cross-section of a tree trunk 1.3 meters above the ground 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
Set up the regression equation of hat width and the diameter of a cross-section of a tree trunk 1.3 meters above the ground with method of least square:
Cw=1.922+0.153 d-0.001 d2
Correlation coefficient r=0.827
B () retains the determination of strain number
According to above-mentioned equation, obtain the hat width theoretical value of the different diameters of a cross-section of a tree trunk 1.3 meters above the ground, and after felling, Canopy densities should be retained in
0.58-0.68, so that it is determined that going out the reasonable strain number scope that Qinggang oak scondary forest should retain in the different diameter of a cross-section of a tree trunk 1.3 meters above the ground stages, such as table 2
Table 2 Qinggang oak scondary forest rationally retains strain number table (± 10% allow excursion) after felling
Unit: centimetre, plant/hectare
3rd, concrete application
A () preferably site type, Qinggang oak broad-leaved mixes the felling method of friendship:
The first step, standing forest have more than 24cm forest, closing of crop, can carry out selection method, and not kairine window after felling；
Second step, selective cutting standing forest is investigated, the diameter of a cross-section of a tree trunk 1.3 meters above the ground of the record 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 more than the 24cm needing 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, are felled by the forest of mark if meeting reserve strain number and requiring (750 ± 10%)；If no
Meet and then enter the 5th step；
5th step: if calculate reservations strain number not in the range of table 2 it is assumed that calculate strain number more than table 2 maximum,
Illustrate that the plan harvest of forest trees being labeled is on the low side, need suitably to increase mark, repeat the 4th step；Until reaching reserve strain number model
Enclose the requirement of table 2 it is possible to be felled by the numbering of mark.
Using this method, Qinggang oak Broad-leaved Mixed Forest in Suining County of Hunan Province preferable site type forest zone is felled:
(1) selective cutting standing forest is investigated, 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, reach
Fell the forest of aimed dia, 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) forest reaching the felling target diameter of a cross-section of a tree trunk 1.3 meters above the ground 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 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 taken is to close hillsides to facilitate afforestation, and forbids to cut down, then treats forest zone timber
Accumulation reaches cuts down during 300 ten thousand stere more by rule of thumb, wastes the time, also results in the waste of forest tree resource.Forest zone is ripe
10 years accumulation mill run are about 600 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 600 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.
B () preferably site type, Qinggang oak needle mixes the felling method of friendship:
The first step, standing forest have more than 24cm forest, closing of crop, can carry out selection method, and not kairine window after felling；
Second step, selective cutting standing forest is investigated, the diameter of a cross-section of a tree trunk 1.3 meters above the ground of the record 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 more than the 24cm needing 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, are felled by the forest of mark if meeting reserve strain number and requiring (820 ± 10%)；If no
Meet and then enter the 5th step；
5th step: if calculate reservations strain number not in the range of table 2 it is assumed that calculate strain number more than table 2 maximum,
Illustrate that the forest intending felling being labeled is on the low side, need suitably to increase mark, repeat the 4th step；Until reaching reserve strain number
The requirement of range table 2 is it is possible to be felled by the numbering of mark.
Using this method, Qinggang oak Broad-leaved Mixed Forest in Suining County of Hunan Province preferable site type forest zone is felled:
(1) selective cutting standing forest is investigated, 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, reach
Fell the forest of aimed dia, 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) forest reaching the felling target diameter of a cross-section of a tree trunk 1.3 meters above the ground 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 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 taken is to close hillsides to facilitate afforestation, and forbids to cut down, then treats forest zone timber
Accumulation reaches cuts down during 260 ten thousand stere more by rule of thumb, wastes the time, also results in the waste of forest tree resource.Forest zone is ripe
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 18cm forest, closing of crop, not kairine window after can carrying out selection method and felling；
Second step, selective cutting standing forest is investigated, the diameter of a cross-section of a tree trunk 1.3 meters above the ground of the record 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 more than the 18cm needing 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, are felled by the forest of mark if meeting reserve strain number and requiring (750 ± 10%)；If no
Meet and then enter the 5th step；
5th step: if calculate reservations strain number not in the range of table 2 it is assumed that calculate strain number more than table 2 maximum,
Illustrate that the forest intending felling being labeled is on the low side, need suitably to increase mark, repeat the 4th step；Until reaching reserve strain number
The requirement of range table 2 is it is possible to be felled by the numbering of mark.
Using this method, Qinggang oak Broad-leaved Mixed Forest in Pingjiang county Hunan province medium site type forest zone is felled:
(1) selective cutting standing forest is investigated, 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
Cut down the forest of aimed dia, 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) forest reaching the felling target diameter of a cross-section of a tree trunk 1.3 meters above the ground 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 select to carry out according to the mean DBH increment according to the form below of reserve (allowable error ±
5%):
(6) step (3)-(4) are pressed, the forest 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 taken is to close hillsides to facilitate afforestation, and forbids to cut down, then treats forest zone timber
Accumulation reaches cuts down during 200 ten thousand stere more by rule of thumb, wastes the time, also results in the waste of forest tree resource.Forest zone is ripe
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, selective cutting standing forest is investigated, the diameter of a cross-section of a tree trunk 1.3 meters above the ground of the record 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 more than the 18cm needing 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, are felled by the forest of mark if meeting reserve strain number and requiring (820 ± 10%)；If no
Meet and then enter the 5th step；
5th step: if calculate reservations strain number not in the range of table 2 it is assumed that calculate strain number more than table 2 maximum,
Illustrate that the forest intending felling being labeled is on the low side, need suitably to increase mark, repeat the 4th step；
Until reaching the requirement of reserve strain number range table 2 it is possible to be felled by the numbering of mark.
Using this method, Qinggang oak needle mixed forest on the spot forest zone medium to Pingjiang county Hunan province is felled:
(1) selective cutting standing forest is investigated, 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, reach
Fell the forest of aimed dia, 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) forest reaching the felling target diameter of a cross-section of a tree trunk 1.3 meters above the ground 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 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 taken is to close hillsides to facilitate afforestation, and forbids to cut down, then treats forest zone timber
Accumulation reaches cuts down during 200 ten thousand stere more by rule of thumb, wastes the time, also results in the waste of forest tree resource.Forest zone is ripe
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 subject to above-described embodiment
Limit, other any spirit without departing from the present invention and the change made under principle, modification, replacement, combine, simplify,
All should be equivalent substitute mode, be included within protection scope of the present invention.
Claims (8)
1. a kind of felling method based on medium on the spot Qinggang oak needle mixed forest is it is characterised in that comprise the steps:
(1) selective cutting standing forest is investigated, determine that standing forest has more than diameter of a cross-section of a tree trunk 1.3 meters above the ground 18cm, reach the forest felling aimed dia, can enter
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) forest of the target diameter of a cross-section of a tree trunk 1.3 meters above the ground reaching felling 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 according to the mean DBH increment according to the form below of reserve:
(6) press step (3), the forest 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 the standard of upper table, then
Fell.
2. according to claim 1 the felling method based on medium on the spot Qinggang oak needle mixed forest it is characterised in that step
(1) Canopy densities of selective cutting standing forest are more than 0.7.
3. according to claim 1 the felling method based on medium on the spot Qinggang oak needle mixed forest it is characterised in that step
(5) after felling, the reserve for 10cm for the mean DBH increment footpath rank is 1400 ± 5% plants/hectare.
4. according to claim 1 the felling method based on medium on the spot Qinggang oak needle mixed forest it is characterised in that step
(5) after felling, the reserve for 12-14cm for the mean DBH increment footpath rank is 1200 ± 5% plants/hectare.
5. according to claim 1 the felling method based on medium on the spot Qinggang oak needle mixed forest it is characterised in that step
(5) after felling, the reserve for 16-18cm for the mean DBH increment footpath rank is 820 ± 5% plants/hectare.
6. according to claim 1 the felling method based on medium on the spot Qinggang oak needle mixed forest it is characterised in that step
(5) after felling, the reserve for 20-22cm for the mean DBH increment footpath rank is 770 ± 5% plants/hectare.
7. according to claim 1 the felling method based on medium on the spot Qinggang oak needle mixed forest it is characterised in that step
(5) after felling, the reserve for 24-26cm for the mean DBH increment footpath rank is 680 ± 5% plants/hectare.
8. according to claim 1 the felling method based on medium on the spot Qinggang oak needle mixed forest it is characterised in that step
(5) after felling, the reserve for more than 26cm for the mean DBH increment footpath rank is 560 ± 5% plants/hectare.
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