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Title:Ocenjevanje natančnosti deblovnic in volumenskih funkcij
Authors:ID Hladnik, David (Author)
ID Kobal, Milan (Author)
Files:.pdf PDF - Presentation file, download (882,11 KB)
MD5: 353952DBC881BE2866978F99EE4A13D1
PID: 20.500.12556/dirros/1e9d2311-8346-4525-a6bb-254c0261f0d7
 
Language:Slovenian
Typology:1.01 - Original Scientific Article
Organization:Logo SciVie - Slovenian Forestry Institute
Abstract:Primerjali smo postopke za ocenjevanje volumna debeljadi jelke na podlagi Huberjevega, Smalianovega in Newtonovega obrazca. Podatke za primerjavo smo dobili z interpolacijo kubičnih zlepkov na podlagi merjenja posekanih dreves. Newtonov in Huberjev postopek sta bila najnatančnejša pri ocenjevanju volumnovstarih jelk (starost do 200 let, povprečni premer 59 cm). Na podlagi izračunanih volumnov smo ocenjevali volumne stoječih dreves v sklopu gozdne inventure. Slovenske Čoklove tarife (1959) so se kljub svoji preprosti zasnovi izkazale s sprejemljivo natančnostjo (povprečno odstopanje v odstotkih od povprečnega volumna < 1 %, R2=0.87). Delež pojasnjene variabilnosti volumnov dreves se je povečal za 5 % pri dvovhodnih deblovnicah in za 11 % pri triparametrskih volumenskih funkcijah.
Keywords:volumen debeljadi, tarife, volumenske funkcije, jelka, Abies alba Mill.
Publication status:Published
Publication version:Version of Record
Year of publishing:2012
Number of pages:str. 3-14
Numbering:Vol. 98
PID:20.500.12556/DiRROS-7755 New window
UDC:630*52
ISSN on article:0351-3114
URN:URN:NBN:SI:doc-PSTYUO9B
COBISS.SI-ID:3580582 New window
Publication date in DiRROS:12.07.2017
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Downloads:1990
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Record is a part of a journal

Title:Zbornik gozdarstva in lesarstva. forest and wood science & technology
Shortened title:Zb. gozd. lesar.
Publisher:Gozdarski inštitut Slovenije, Biotehniška fakulteta, Oddelek za gozdarstvo in obnovljive gozdne vire, Biotehniška fakulteta, Oddelek za lesarstvo
ISSN:0351-3114
COBISS.SI-ID:6206978 New window

Secondary language

Language:Slovenian
Title:Estimating the accuracy of volume tables and volume equations for Silver fir
Abstract:Comparisons of stem volume estimation techniques were performed based on equations of Huber, Smalian and Newton, and a cubic spline interpolation of points along the silver fir tree stems. Results indicate that Newton`s and Huber`s equations were the most accurate in determining volumes of old silver fir trees (age up to 200 years and average dbh 59 cm). The obtained tree volumes were the basis for the standing timber estimation in the forest inventory. Despite their rather simple structure, the Slovene Čokl (1959) tariff functions proved to be sufficiently accurate (average residual in percentage of the mean volume < 1%, R2=0.87). The proportion of the individualtree volume variance explained increased by 5 % for standard two-entry volume tables and by 11% for three-parameter volume functions.


Collection

This document is a part of these collections:
  1. Acta Silvae et Ligni

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