CN108510182A - A kind of Natural Uneven-Aged Forests age survey meter method - Google Patents
A kind of Natural Uneven-Aged Forests age survey meter method Download PDFInfo
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Abstract
The present invention relates to the accurate quantitative studies of forest, and in particular to a kind of Natural Uneven-Aged Forests age survey meter method, scheme include the following steps：(1) different initial ages are arranged to the forest of each seeds first phase diameter of a cross-section of a tree trunk 1.3 meters above the ground minimum, acquire the more phase diameters of a cross-section of a tree trunk 1.3 meters above the ground and age coordinate information of the forest, further acquire the more phase diameters of a cross-section of a tree trunk 1.3 meters above the ground and age coordinate information of all forests of each seeds；(2) growth simulation is carried out to the more phase diameters of a cross-section of a tree trunk 1.3 meters above the ground of each seeds of acquisition and age coordinate information, builds the initial growth model of each seeds；(3) accurate age T when according to Tree height growth to 1.3m0, filter out the final growth model of each seeds；(4) model for determining step (3) carries out the conversion of independent variable and dependent variable, and diameter rank age and the crop age of Natural Uneven-Aged Forests are calculated according to transformed model.The present invention is that China achieves breakthrough in research uneven aged forest age composition problem, and foundation is provided for further research uneven aged forest Stand Growth succession and growth simulation.
Description
Technical field
The present invention relates to the accurate quantitative studies of forest, and in particular to a kind of Natural Uneven-Aged Forests age survey meter method.
Background technology
Natural Uneven-Aged Forests be often the forest by all ages and classes, different diameter grade and different tree species in same on the spot upper development and
At.Natural Uneven-Aged Forests are the main bodys of China's Forest Resources, compared with the forest of the same age, uneven aged forest composition, diameter structure, age knot
Structure, woods layer structure, Stand Growth succession are more complicated, and it is also more difficult to carry out correlative study.
The uneven aged forest age is to reflect setting out for site quality, stand regeneration Wuling mountain and determining uneven aged forest Operation Measures
Point, therefore effective ways are built to measure uneven aged forest Stand Age be vital.But it is different from the forest of the same age, uneven aged forest standing forest
Interior tree age distribution gradient is big, and actual measurement work is extremely difficult.The method for measuring uneven aged forest Stand Age both at home and abroad at present is main
Have：Ocular estimate, average tree method, arithmetic or weighted mean method and according to model pre-estimating, but that there are subjectivities is too strong for these methods
Or the defect that estimate accuracy is not high.
Invention content
Same seeds, under same growth conditions, the age of tree growth and the diameter of a cross-section of a tree trunk 1.3 meters above the ground are in close relations, and the present invention uses diameter
Growth model is fitted the age-related growth model parameter of the diameter of a cross-section of a tree trunk 1.3 meters above the ground of each seeds in sample ground, and then extrapolates standing forest average year
Age achieves breakthrough on China's uneven aged forest age studies a question, for further research uneven aged forest Stand Growth succession
Foundation is provided with growth simulation.The forest diameter of a cross-section of a tree trunk 1.3 meters above the ground, is the diameter of the trunk at 1.3 meters away from rootstock in the present invention, claims breastheight
Diameter, the abbreviation diameter of a cross-section of a tree trunk 1.3 meters above the ground.
The technical scheme is that a kind of Natural Uneven-Aged Forests age surveys meter method, the method is particularly suitable for National Forest
The standing forest of standing forest or long term monitoring that resource is continuously checked, includes the following steps：
(1) different initial ages are arranged to the first phase forest of seeds diameter of a cross-section of a tree trunk 1.3 meters above the ground minimum to be measured in standing forest, acquire the forest
More phase diameters of a cross-section of a tree trunk 1.3 meters above the ground and age coordinate information, and further acquire the more phase diameters of a cross-section of a tree trunk 1.3 meters above the ground and age coordinate information of all forests of each seeds；It sits
Abscissa x-axis in mark is age parameter, and ordinate y-axis is diameter of a cross-section of a tree trunk 1.3 meters above the ground parameter.
(2) growth simulation is carried out to the more phase diameters of a cross-section of a tree trunk 1.3 meters above the ground of each seeds of acquisition and age coordinate information, builds the multiple of each seeds
Initial growth model, there are different intersection point t from x-axis for different initial growth models0。
(3) accurate age T when according to Tree height growth to 1.3m0, it may be determined that the intersection point t with x-axis0Equal to T0Initial life
Long model is final growth model；At this point, the forest diameter of a cross-section of a tree trunk 1.3 meters above the ground is 0, and the age is just year of the tree growth to 1.3 meters of little trees when high
Age.
(4) model for determining step (3) carries out the conversion of independent variable and dependent variable, and day is calculated according to transformed model
The diameter rank age of right uneven aged forest and crop age.
Preferably, the minimum diameter of a cross-section of a tree trunk 1.3 meters above the ground forest described in step (1) is that all forests of certain seeds are pressed the ascending row of the diameter of a cross-section of a tree trunk 1.3 meters above the ground
Row, the forest of first phase diameter of a cross-section of a tree trunk 1.3 meters above the ground minimum be determined as the seeds minimum diameter of a cross-section of a tree trunk 1.3 meters above the ground forest (first plant of forest, it is easier because forest is smaller
Estimate its age), this plant of forest is arranged different initial ages.
Preferably, step (1) refers to according to forest diameter of a cross-section of a tree trunk 1.3 meters above the ground size and seeds growth characteristics minimum diameter of a cross-section of a tree trunk 1.3 meters above the ground forest age assignment
Assign multiple possible different size of ages.
Preferably, the minimum more phase diameters of a cross-section of a tree trunk 1.3 meters above the ground of diameter of a cross-section of a tree trunk 1.3 meters above the ground forest of the acquisition described in step (1) and the method for age coordinate information are：It is right
First phase minimum diameter of a cross-section of a tree trunk 1.3 meters above the ground forest (diameter of a cross-section of a tree trunk 1.3 meters above the ground D11) setting initial age t1, coordinate information is (D11,t1)；The forest second phase
(diameter of a cross-section of a tree trunk 1.3 meters above the ground D12) age be age first phase t1It is (D to add investigation interval A, coordinate information12,t1+A)；The forest third phase
(diameter of a cross-section of a tree trunk 1.3 meters above the ground D13) age be age first phase t1It is (D to add 2 times of investigation intervals, coordinate information13,t1+2A)；N-th phase of forest
(diameter of a cross-section of a tree trunk 1.3 meters above the ground D1n) age be age first phase t1(n-1) times is added to investigate interval, coordinate information is (D1n,t1+(n-1)*A)。
Therefore, more phase diameters of a cross-section of a tree trunk 1.3 meters above the ground of minimum diameter of a cross-section of a tree trunk 1.3 meters above the ground forest are with age coordinate information：(D11,t1)、(D12,t1+A)、(D13,t1+2A)…
(D1n,t1+(n-1)*A).Note：Diameter of a cross-section of a tree trunk 1.3 meters above the ground D1nIt is known that known to investigation interval A.
Preferably, all more phase diameters of a cross-section of a tree trunk 1.3 meters above the ground of forest of acquisition described in step (1) and the method for age coordinate information are：Known
Two plants of forest diameters are D21, it is assumed that its age size is t2, according to same seeds growth rate base under same land occupation condition
This consistent rule can speculate the growth rate of second plant of forest and first plant of forest (diameter of a cross-section of a tree trunk 1.3 meters above the ground minimum forest)Substantially
Unanimously, it is known that the more phase diameters of a cross-section of a tree trunk 1.3 meters above the ground of first plant of forest (diameter of a cross-section of a tree trunk 1.3 meters above the ground minimum forest) and age, second plant of tree growth rate and the diameter of a cross-section of a tree trunk 1.3 meters above the ground utilize
Tangent function formula can calculate second plant of forest first-phase age and beIt mutually should forest second phase
Age is (t2+ A), the age of the third phase is (t2+ 2A), the age of the n-th phase is (t2+ (n-1) * A), more phases of second plant of forest
The diameter of a cross-section of a tree trunk 1.3 meters above the ground is with age coordinate information：(D21,t2)、(D22,t2+A)、(D23,t2+2A)…(D2n,t2+(n-1)*A).Same side
Method, it is known that the first phase diameter of a cross-section of a tree trunk 1.3 meters above the ground of m plants of forests is Dm1, the age first phase that can calculate m plants of forests is:The forest n phases diameter of a cross-section of a tree trunk 1.3 meters above the ground and age coordinate information：(Dm1, tm)、(Dm2, tm+A)、(Dm3, tm+
2A)、(Dm4, tm+3A)…(Dmn, tm+ (n-1) * A), same method can acquire the diameter of a cross-section of a tree trunk 1.3 meters above the ground and the age of remaining seeds standing forest Nei
Coordinate information.
Preferably, for step (2) to the growth simulation of the diameter of a cross-section of a tree trunk 1.3 meters above the ground and coordinate information, used fit equation is Richards moulds
Type, multiple initial growth models of each seeds can be built with Richards models, and different initial growth models exist not with x-axis
Same intersection point t.
Preferably, the accurate age T when Tree height growth described in step (3) is to 1.3 meters0It is 1.3 meters high using being more than
Little tree carries out stem analysis, the average age when seeds Tree height growth of acquisition is to 1.3m.
Preferably, the final diameter of a cross-section of a tree trunk 1.3 meters above the ground described in step (3) and age-growth curve, refer to using each seeds Tree height growth extremely
The accurate age T of 1.3m0, as a certain initial growth model of each seeds and the intersection point t of x-axis0Equal to T0When, it may be determined that it is the tree
The final growth model of kind.
Preferably, the conversion of the model independent variable and dependent variable described in step (4), refers to and works as the final growth curve of each seeds
In independent variable converted with dependent variable, transformed model, using the diameter of a cross-section of a tree trunk 1.3 meters above the ground as independent variable, the age is dependent variable.
Preferably, the diameter rank age of the calculating Natural Uneven-Aged Forests described in step (4) and crop age, refer to each seeds
Diameter rank and mean DBH increment substitute into transformed model, you can calculate diameter rank age and the average age of each seeds, so
The method for utilizing basal area weighting afterwards, can calculate diameter rank age and the crop age of uneven aged forest standing forest.
The method application of the present invention is feasible, reliable, after programming and visualizing, carries out batch and calculates simply, intuitively.Energy
Enough ages for relatively accurately surveying meter Natural Uneven-Aged Forests.The age estimation previously for wildwood is overcome, it is by rule of thumb, random
Big defect.
Specific implementation mode
It is exemplified below the preferred embodiment of the present invention, to help to further understand the present invention, but the protection model of the present invention
It encloses and is not limited in these embodiments.
Operating procedure：
(1) diameter of a cross-section of a tree trunk 1.3 meters above the ground and age coordinate information of minimum diameter of a cross-section of a tree trunk 1.3 meters above the ground forest are acquired.To first phase minimum diameter of a cross-section of a tree trunk 1.3 meters above the ground forest, (diameter of a cross-section of a tree trunk 1.3 meters above the ground is
D11) setting initial age t1, coordinate information is (D11,t1)；The forest second phase (diameter of a cross-section of a tree trunk 1.3 meters above the ground D12) age be the age first phase
t1It is (D to add investigation interval A, coordinate information12,t1+A)；The forest third phase (diameter of a cross-section of a tree trunk 1.3 meters above the ground D13) age be the age first phase
t1It is (D to add 2 times of investigation intervals, coordinate information13,t1+2A)；N-th phase of forest (diameter of a cross-section of a tree trunk 1.3 meters above the ground D1n) age be the age first phase
t1(n-1) times is added to investigate interval, coordinate information is (D1n,t1+(n-1)*A).Therefore, more phase diameters of a cross-section of a tree trunk 1.3 meters above the ground of minimum diameter of a cross-section of a tree trunk 1.3 meters above the ground forest
It is with age coordinate information：(D11,t1)、(D12,t1+A)、(D13,t1+2A)…(D1n,t1+(n-1)*A).Note：Diameter of a cross-section of a tree trunk 1.3 meters above the ground D1nIt is known that
It investigates known to interval A.
(2) diameter of a cross-section of a tree trunk 1.3 meters above the ground and age coordinate information of all forests are acquired.Known second plant of forest diameter is D21, it is assumed that its
Age size is t2, the rule almost the same according to same seeds growth rate under same land occupation condition can speculate second plant of woods
The growth rate of wood and first plant of forest (diameter of a cross-section of a tree trunk 1.3 meters above the ground minimum forest)It is almost the same, it is known that (diameter of a cross-section of a tree trunk 1.3 meters above the ground is minimum for first plant of forest
Forest) the more phase diameters of a cross-section of a tree trunk 1.3 meters above the ground and age, second plant of tree growth rate and the diameter of a cross-section of a tree trunk 1.3 meters above the ground, it can calculate second plant of woods using tangent function formula
Wood first-phase age isMutually should the forest second phase age be (t2+ A), the age of the third phase is
(t2+ 2A), the age of the n-th phase is (t2+ (n-1) * A), more phase diameters of a cross-section of a tree trunk 1.3 meters above the ground of second plant of forest are with age coordinate information：(D21,
t2)、(D22,t2+A)、(D23,t2+2A)…(D2n,t2+(n-1)*A).Same method, it is known that the first phase chest of m plants of forests
Diameter is Dm1, the age first phase that can calculate m plants of forests is:The forest n phases diameter of a cross-section of a tree trunk 1.3 meters above the ground with
Age coordinate information：(Dm1, tm)、(Dm2, tm+A)、(Dm3, tm+2A)、(Dm4, tm+3A)…(Dmn, tm+ (n-1) * A), similarly
Method can acquire the diameter of a cross-section of a tree trunk 1.3 meters above the ground and age coordinate information of remaining seeds standing forest Nei.
(3) known several groups of different more phase diameters of a cross-section of a tree trunk 1.3 meters above the ground of all forests of certain seeds and age coordinate information, utilize the side Richards
Journey is fitted the diameter of a cross-section of a tree trunk 1.3 meters above the ground and age-growth relationship of the seeds, obtains the different initial growth model of several groups of the seeds, difference growth mould
Type has different intersection value t from x-axis0。
(4) under same land occupation condition, standard of the seeds Tree height growth to 1.3m when is obtained using the method for stem analysis
True age T0, as the intersection value t of a certain growth model and x-axis in step (3)0With accurate age T0When equal, it may be determined that the growth
Model is the final growth model of the seeds；
(5) each seeds are finally grown mould by the final growth model that different tree species in uneven aged forest can be obtained by step (1-4)
The independent variable of type is converted with dependent variable, and diameter rank age and the woods of Natural Uneven-Aged Forests can be calculated using transformed growth model
Divide average age.
The diameter of a cross-section of a tree trunk 1.3 meters above the ground described in each embodiment is the diameter of the trunk at 1.3 meters away from rootstock, claims brerast-height diatmeter, the abbreviation diameter of a cross-section of a tree trunk 1.3 meters above the ground.
One plot of the Pingjiang county Hunan province forest farms Lu Tou Natural Uneven-Aged Forests standing forest is chosen, has National Forest resource continuously clear in standing forest
The permanent sample plot looked into, chief species include Qinggang oak, China fir, masson pine, and 1989 to 2014, investigation in every 5 years was primary, adjusts
It is divided between looking into 5 years, shares 6 phase tree breast diameter survey data.
1. the diameter of a cross-section of a tree trunk 1.3 meters above the ground and age coordinate information of the minimum diameter of a cross-section of a tree trunk 1.3 meters above the ground forest of acquisition
3 seeds are shared in standing forest, need to divide the seeds acquisition diameter of a cross-section of a tree trunk 1.3 meters above the ground and age coordinate information, the diameter of a cross-section of a tree trunk 1.3 meters above the ground is ascending by seeds
The forest of arrangement, diameter of a cross-section of a tree trunk 1.3 meters above the ground minimum is first plant, is subsequently followed successively by second plant, n-th plant of third strain ....By first plant of woods of each seeds
The different starting ages is respectively set in wood, such as table 1.
Table 1
The diameter of a cross-section of a tree trunk 1.3 meters above the ground size of first plant of 6 phase of forest of known Qinggang oak be respectively 5cm, 6.5cm, 7.6cm, 8.8cm, 9.8cm,
10.2cm set the age first phase of first plant of forest (5cm) of Qinggang oak as 11 years, then the first-phase diameter of a cross-section of a tree trunk 1.3 meters above the ground is believed with age coordinate
Breath is (5,11)；The age second phase is to add investigation interval (5 years) age first phase, and the age second phase was 16 (11+5) years, then
The diameter of a cross-section of a tree trunk 1.3 meters above the ground of the second phase is (6.5,16) with age coordinate information；The age third phase is to add for 2 (3-1) times intervals at the age first phase,
The age third phase was 21 (11+5*2) years, then the diameter of a cross-section of a tree trunk 1.3 meters above the ground of the third phase and age coordinate information are (7.6,21)；In this approach it is found that
6 coordinate informations of first plant of Qinggang oak be (5,11), (6.5,16), (7.6,21), (8.8,26), (9.8,31), (10.2,
36)。
According to the method described above, the 6 phase diameters of a cross-section of a tree trunk 1.3 meters above the ground and the age of the minimum diameter of a cross-section of a tree trunk 1.3 meters above the ground forest of China fir and masson pine can be collected respectively
Coordinate information.
2. the diameter of a cross-section of a tree trunk 1.3 meters above the ground and age coordinate information of all forests of acquisition
The diameter of a cross-section of a tree trunk 1.3 meters above the ground size of second plant of 6 phase of forest of known Qinggang oak be respectively 5.8cm, 6.9cm, 8.0cm, 9.9cm,
12.0cm, 13.7cm, second plant of forest first phase diameter of a cross-section of a tree trunk 1.3 meters above the ground (5.8cm) is between first plant of forest first phase diameter of a cross-section of a tree trunk 1.3 meters above the ground (5cm) and second
Between the phase diameter of a cross-section of a tree trunk 1.3 meters above the ground (6.5cm).According to the same definition for developing system naturally, growth speed of the same tree kind under same land occupation condition
Rate is almost the same, it is believed that the growth rate of second plant of first-phase growth rate of forest and first plant of forest first to the second phase
Unanimously Known second plant of forest first phase growth rate (0.3cm/a), diameter of a cross-section of a tree trunk 1.3 meters above the ground 5.8cm, first plant
The forest first phase diameter of a cross-section of a tree trunk 1.3 meters above the ground is 5.0cm and 11 year with the age, and second plant of age forest first phase is about 14 yearsThen
Two plants of forest first phase diameters of a cross-section of a tree trunk 1.3 meters above the ground are (5.8,14) with age coordinate information；The age second phase is 19 (14+5), and coordinate information is
(6.9,19), therefore, the 6 phase diameters of a cross-section of a tree trunk 1.3 meters above the ground of second plant of forest and age coordinate information be respectively (5.8,14), (6.9,19), (8.0,
24)、(9.9,29)、(12.0,34)、(13.7,39)。
Same method can obtain the diameter of a cross-section of a tree trunk 1.3 meters above the ground and age coordinate information of third strain and 6 phase of Qinggang oak all forests.
According to the method described above, the diameter of a cross-section of a tree trunk 1.3 meters above the ground that can collect China fir and 6 phase of masson pine all forests respectively is believed with age coordinate
Breath.
3. being fitted initial growth model
It is respectively that Qinggang oak minimum diameter of a cross-section of a tree trunk 1.3 meters above the ground forest is provided with 10 initial ages above, according to the above method, Qinggang oak meeting
The diameter of a cross-section of a tree trunk 1.3 meters above the ground and age coordinate information for obtaining 10 groups of all forests, utilize the growth relationship of the Richards equation models diameter of a cross-section of a tree trunk 1.3 meters above the ground and age
When, 10 growth models can be equally obtained, 10 growth models there are different intersection point t from x-axis0, 10 growth moulds of Qinggang oak
The parameter of type such as table 2.
Table 2
According to the method described above, 10 different growth models of China fir and masson pine can be obtained respectively.
4. filtering out final growth model
Under same land occupation condition, the little tree to 15 plants of Qinggang robur height higher than 1.3m carries out stem analysis, by analysis
It is found that accurate age of Qinggang oak when Tree height growth is to 1.3m under the land occupation condition is 4 years.The growth model fitted above
With the intersection point biological significance of x-axis be Tree height growth to 1.3m when age, that is to say, that when 10 growth models of Qinggang oak with
The intersection point t of x-axis0When equal with the 4 years accurate ages obtained by stem analysis, it may be determined that the growth model is final growth mould
Type, as shown in Table 2, t in model serial number 60Equal to 4, it may be determined that be final growth model, equation formulations are：
D=(1-e-0.0161*(t-4))1.6099
In formula, D is the diameter of a cross-section of a tree trunk 1.3 meters above the ground, and t is the age.
Practical work has often measured the diameter of a cross-section of a tree trunk 1.3 meters above the ground in the middle, needs to ask and calculate the age, therefore above formula is carried out dependent variable and become certainly
The conversion of amount, the transformed final growth model of Qinggang oak are：
According to the method described above, China fir can be obtained respectively and the final growth model of masson pine is：
China fir
Masson pine
5. the measurement of Stand Age
It can estimate the diameter rank of 1989 to 2014 each investigation phases of uneven aged forest respectively using the final growth model of 3 seeds
Age and crop age.
5.1 diameter rank age datings
The diameter rank age of 3 seeds is measured using the final growth model of 3 seeds, then 3 seeds of diameter rank pair respectively
Age take arithmetic mean of instantaneous value, as the diameter rank age of uneven aged forest, be shown in Table 3.
Table 3
5.2 crop ages measure
The average age that 3 seeds respectively investigate the phase is surveyed using the final growth model of 3 seeds, is then added using basal area
The method of weight average, which is asked, calculates the crop age that uneven aged forest respectively investigates the phase, is shown in Table 4.
Table 4
According to the above method, other polyliths are verified with verifying sample, fitting age of measurement and real age it is exhausted
It it is 3 years to max value of error, relative error maximum value is 12.5%, and it is 5% that average absolute percent error, which is respectively less than, is fitted the age
It is smaller with the otherness of trees real age.Therefore, this assay method is reliable, feasible.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, it is other it is any without departing from the spirit and principles of the present invention made by changes, modifications, substitutions, combinations, simplifications,
Equivalent substitute mode is should be, is included within the scope of the present invention.
Claims (10)
1. a kind of Natural Uneven-Aged Forests age surveys meter method, characterized in that include the following steps：
(1) different initial ages are arranged to the first phase forest of seeds diameter of a cross-section of a tree trunk 1.3 meters above the ground minimum to be measured in standing forest, acquire more phases of the forest
The diameter of a cross-section of a tree trunk 1.3 meters above the ground and age coordinate information, and further acquire the more phase diameters of a cross-section of a tree trunk 1.3 meters above the ground and age coordinate information of all forests of each seeds；
(2) growth simulation is carried out to the more phase diameters of a cross-section of a tree trunk 1.3 meters above the ground of each seeds of acquisition and age coordinate information, builds the multiple initial of each seeds
Growth model, there are different intersection point t from x-axis for different initial growth models0；
(3) accurate age T when according to Tree height growth to 1.3m0, it may be determined that the intersection point t with x-axis0Equal to T0Initial growth mould
Type is final growth model；
(4) model for determining step (3) carries out the conversion of independent variable and dependent variable, is calculated according to transformed model natural different
The diameter rank age of age woods and crop age.
2. a kind of Natural Uneven-Aged Forests age surveys meter method according to claim 1, characterized in that the seeds described in step (1)
First phase minimum diameter of a cross-section of a tree trunk 1.3 meters above the ground forest is that the seeds first phase all forests are pressed the ascending arrangement of the diameter of a cross-section of a tree trunk 1.3 meters above the ground, the forest of diameter of a cross-section of a tree trunk 1.3 meters above the ground minimum
It is determined as the seeds minimum diameter of a cross-section of a tree trunk 1.3 meters above the ground forest, different initial ages is arranged to this plant of forest.
3. a kind of Natural Uneven-Aged Forests age surveys meter method according to claim 1, characterized in that the forest described in step (1)
More phase diameters of a cross-section of a tree trunk 1.3 meters above the ground are 3 years or 5 years as an investigation interval, the forest diameter of a cross-section of a tree trunk 1.3 meters above the ground data of replication.
4. a kind of Natural Uneven-Aged Forests age surveys meter method according to claim 1, characterized in that step (1) to each seeds most
Different initial ages are arranged in small diameter of a cross-section of a tree trunk 1.3 meters above the ground forest, refer to according to forest diameter of a cross-section of a tree trunk 1.3 meters above the ground size and seeds growth characteristics assign it is multiple it is possible not
With the age of size.
5. a kind of Natural Uneven-Aged Forests age surveys meter method according to claim 1, characterized in that the acquisition described in step (1)
The minimum more phase diameters of a cross-section of a tree trunk 1.3 meters above the ground of diameter of a cross-section of a tree trunk 1.3 meters above the ground forest and the method for age coordinate information are：To first phase minimum diameter of a cross-section of a tree trunk 1.3 meters above the ground forest (diameter of a cross-section of a tree trunk 1.3 meters above the ground D11) setting
Initial age t1, coordinate information is (D11,t1)；The forest second phase (diameter of a cross-section of a tree trunk 1.3 meters above the ground D12) age be age first phase t1Add investigation
Interval A, coordinate information are (D12,t1+A)；The forest third phase (diameter of a cross-section of a tree trunk 1.3 meters above the ground D13) age be age first phase t1Add 2 times of tune
It looks into interval, coordinate information is (D13,t1+2A)；N-th phase of forest (diameter of a cross-section of a tree trunk 1.3 meters above the ground D1n) age be age first phase t1Add (n-1)
Investigation interval again, coordinate information are (D1n,t1+(n-1)*A).Therefore, more phase diameters of a cross-section of a tree trunk 1.3 meters above the ground of minimum diameter of a cross-section of a tree trunk 1.3 meters above the ground forest are sat with the age
Marking information is：(D11,t1)、(D12,t1+A)、(D13,t1+2A)…(D1n,t1+ (n-1) * A), wherein diameter of a cross-section of a tree trunk 1.3 meters above the ground D1nIt is known that between investigation
Every known to phase A.
6. a kind of Natural Uneven-Aged Forests age surveys meter method according to claim 1, characterized in that the acquisition described in step (1)
All more phase diameters of a cross-section of a tree trunk 1.3 meters above the ground of forest and the method for age coordinate information are：Known second plant of forest diameter is D21, it is assumed that its age
Size is t2, the rule almost the same according to same seeds growth rate under same land occupation condition, can speculate second plant of forest with
The growth rate of first plant of forest (diameter of a cross-section of a tree trunk 1.3 meters above the ground minimum forest)It is almost the same, it is known that the first plant of forest (diameter of a cross-section of a tree trunk 1.3 meters above the ground most holt
Wood) the more phase diameters of a cross-section of a tree trunk 1.3 meters above the ground and age, second plant of tree growth rate and the diameter of a cross-section of a tree trunk 1.3 meters above the ground, it can calculate second plant of forest using tangent function formula
The first-phase age isMutually should the forest second phase age be (t2+ A), the age of the third phase is (t2
+ 2A), the age of the n-th phase is (t2+ (n-1) * A), more phase diameters of a cross-section of a tree trunk 1.3 meters above the ground of second plant of forest are with age coordinate information：(D21,t2)、
(D22,t2+A)、(D23,t2+2A)…(D2n,t2+(n-1)*A).Same method, it is known that the first phase diameter of a cross-section of a tree trunk 1.3 meters above the ground of m plants of forests is
Dm1, the age first phase that can calculate m plants of forests is:The forest n phases diameter of a cross-section of a tree trunk 1.3 meters above the ground and age
Coordinate information：(Dm1, tm)、(Dm2, tm+A)、(Dm3, tm+2A)、(Dm4, tm+3A)…(Dmn, tm+ (n-1) * A), same method,
The diameter of a cross-section of a tree trunk 1.3 meters above the ground and age coordinate information of remaining seeds standing forest Nei can be acquired.Abscissa x-axis in coordinate is age parameter, ordinate
Y-axis is diameter of a cross-section of a tree trunk 1.3 meters above the ground parameter.
7. a kind of Natural Uneven-Aged Forests age surveys meter method according to claim 1, characterized in that step (2) is to the diameter of a cross-section of a tree trunk 1.3 meters above the ground and seat
The growth simulation of information is marked, used fit equation is Richards models.
8. a kind of Natural Uneven-Aged Forests age surveys meter method according to claim 1, characterized in that each tree described in step (2)
The multiple initial growth models of kind, refer to since provided with different initial ages, each seeds will produce multigroup diameter of a cross-section of a tree trunk 1.3 meters above the ground and age information,
Multiple initial growth models are will produce with models fitting, and there are different intersection point t from x-axis for different initial growth models0。
9. a kind of Natural Uneven-Aged Forests age surveys meter method according to claim 1, characterized in that the tree described in step (3) is high
Accurate age T when growing to 1.3 meters0It is to carry out stem analysis using the little tree more than 1.3 meters high, the seeds tree of acquisition is high
Grow to average age when 1.3m.
10. a kind of Natural Uneven-Aged Forests age surveys meter method according to claim 1, characterized in that final described in step (3)
Growth model refers in initial growth model, is equal to T with the intersection point of x-axis0Model.
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