SU1544286A1 - Relascopic numbering method of determining current increase of sums of tree cross-sectional areas - Google Patents

Abstract

This invention relates to forest inventory and forest inventory. The purpose of the invention is to reduce labor costs. The method includes laying in a taxed tree stand of circular relascopic samples / CRP /, sampling from trunks of radial wood samples / cores /, additional measurements of individual trees consisting of recalculating diameters in the direction of the perpendicular line of the relascopic sighting / D 1 / I (cm) and measure the distance from the center of the sample to the conventional tree axis (LI) (m). New in the method is that before the mortgage of the PKK the average periodic radial growth of the stand / Z ^N / is determined and only those trees are taken into account for which the inequality @ 5 (D 1 / I-ΤLI) ≤ is true ^. Z ^N (mm) where Τ is a constant value for a given relascope coefficient K, with K = 1.0, = 2.0. The value of the current increment of the sum of the cross-sectional areas is defined as the arithmetic average number of trees counted in this way on each of the samples. Z ^N pre-taxation eliminates core sampling to determine the prescription of individual trees in the sample. A reliable estimate of the average radial growth requires a measurement of a smaller number of cores. 1 tab.

Description

This invention relates to forest inventory and forest inventory.

The aim of the invention is to reduce labor costs.

The method includes laying in a taxed tree stand of circular relascopic samples, taking radial wood samples (cores) from the trunks, measuring individual trees included in the sample, consisting of measuring trunk diameters at chest height (1.3 m) in the direction perpendicular to lines of relascopic sighting d (cm4-, and measurement of the distance from the center of the sample to the conventional axis of the trunk lt (m). The sampling of cores (drilling of trunks) is done before laying the circular relascopic samples, as a result of which the average periodic growth of trees in taxed tree stand

 (m)

The value of z is obtained as the product of the average width of the tree.

315442864

for layer I, added over the period n by a factor, and for pine is 1.103; the magnitude and - coefficient f characterizes - a periodic increase in diameter of 2.2 cm. The observed increase in bark relative to that at the coefficient of variation of wood growth according to the formula

 (mm) (1) When laying circular relascopic samples during measurements of individual trees from their total number, only those for which the inequality is true are taken into account

5 (dt-tl.) (2) or

() z ;, o)

where, 2z ;;

$ is a constant value for a given relascopic coefficient k, for, 0 Y 2,0. The value of the current periodic increment of the sum of the cross-sectional areas of trees (in m / ha) will be a radial increase equal to 52.5%, the obtained accuracy of its estimation was 9.6% with a probability of a conclusion of 0.68.

In this planting evenly

throughout its area, 12 circular relascopic sites were laid; for this purpose, a V.R. Bitterlich mirror mirror was used. Measurements were made with a relascopic coefficient of 1.0. Measurements of doubtful trees and trees, slightly overlapping a single strip of the scale of the relas-cop, were carried out as follows. The diameters at chest height were measured perpendicular to the line of relascopic sighting with a gradation of 0.2 cm.

but the number of trees counted, i.e. metropolitan measuring fork. The distance of the measured trees, for which vertexes from the center of the samples to the conditional axis are reduced, are reduced inequalities. In those, a tape measure with a gradation was measured when 5 () zr, trees were 25 o, 1 m. 69 samples were taken into account learning two at one time, i.e. each such tree is counted for 0.5 m / ha.

There are also two trees, each of which was accounted for in 0.5 m / ha. Of the total number of trees, 37 were measured, of which

Example. In the 45-year-old pine ke

There are also two trees, each of which was accounted for in 0.5 m / ha. Of the total number of trees, 37 were measured, of which

Grade 1 in 30 trees, 28 trees were selected in the sample. personal thickness steps were taken at the first test at five measured by one core. Core sampling of trees (in the first three samples led by the Pressler drill. No drilling of trees was done at the chest height (1.3 m)) the diameter increment was measured in a random direction. The selection of the item of entry into the circular Relaskorev was random and a sample was taken (, 01t), respectively, uniformly along a diagonal course, which was 1.8; 1.8; 2.8; 2.0 crossing the entire taxed dre and 2.0 cm. Of the five trees, east is counted. The cores were measured using lu- only four, since the third of the obs, which has a scale with a scale value of 0, is 1 mm. As a result, the following data were obtained: the width of the annual ring over the past 10 years is equal to 10.0 mm; periodic radial growth of 11.0 mm, given that

The current periodic increase in the sum of the taxation of the increase in the sum of the area of cross-sections of the dan-dey sections was 5.88% with a vertical plantation equal to 5.67 m / ha. 0.68 and 11.76% with the likelihood

The coefficient of variation r & turned out to be equal to 20.36%, hence the point of the conclusion is 0.95. This is quite high accuracy of determining one

metropolitan measuring fork. The distance from the center of the samples to the conditional axis of the trees was measured with a roulette with a gradation of about 1 m.

There are also two trees, each of which was accounted for in 0.5 m / ha. Of the total number of trees, 37 were measured, of which

40 measured trees have a diameter increment greater than the average increment of taxed stands for 10 years. As a result, for planting in general, the results obtained in

45 table.

These conclusions are 0.95. This is quite high accuracy of determining one

of the most variable tax indicators.

The advantage of this method is that in the course of the work, the trained performer will develop a sufficiently accurate eye, which allows taking into account a significant part of the trees without additional measurements. Measuring the diameter of trees and measuring the distance from the center of the sample to the conditional axis of the trunk of these trees will be needed only in doubtful cases and in the order of self-control. Due to the fact that the value of the periodic radial increment is constant and known before the start of work on the laying of circular relascopic samples, this is possible.

The method will require a smaller number of cores, since to determine the average periodic radial growth in sphagnum pine with an accuracy of 9.6% with a probability of a conclusion of 0.90, it is necessary to extract and measure cores of 30 accounting trees, and in a pine lichen to achieve an accuracy of 8 , 6% with the same probability of 15 cores. In this case, the known method required to determine the current periodic increment of the sum of the cross-sectional areas, which turned out to be 1.68 mg / ha, on 30 circular relascopic core samples 71, which is more laborious.

Claims (1)

Invention Formula Relascopically-enumerated method for determining the current increase in the sum of the cross-sectional areas trees, including laying in a taxable set of circular relascopic samples, sampling from trunks of radial wood samples and additional measurements of individual trees, consisting of recalculating diameters in the direction perpendicular to the relascopic line of sight, and measure the distance from the center of the sample to the conditional tree axis, characterized in that, in order to reduce labor costs, before laying circular relascopic samples 5 determine the value of the average radial increment of stands for the period of interest and on the relascopic samples take into account only those trees for which 0 inequality g /. I, VI a 5 (du-llt) szf} where cL is the diameter of the 1st tree, measured in the direction perpendicular to the line of the rela- tive copying, cm; T is a constant value at a given relascopic coefficient 1c, at, 0, 0; lt — distance from the center of the sample to the conventional axis of the 1st tree, m; zЈ - the average radial growth of the HZ period n years, mm, at the same time, the current increase in the sum of the cross-sectional areas of the trees for the given plantation is determined as the arithmetic average number of trees thus counted on each of the samples.