20.500.12556/DiRROS-7755 Ocenjevanje natančnosti deblovnic in volumenskih funkcij Estimating the accuracy of volume tables and volume equations for Silver fir 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. 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. volumen debeljadi tarife volumenske funkcije jelka Abies alba Mill. true false true Slovenski jezik Slovenski jezik Znanstveno delo 2017-07-12 09:19:19 2017-07-12 09:19:19 2022-08-16 09:26:04 0000-00-00 00:00:00 2012 0 0 str. 3-14 Vol. 98 2012 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*52 0351-3114 URN:NBN:SI:doc-PSTYUO9B 3580582 6206978 RAZ_Hladnik_David_i2012.pdf RAZ_Hladnik_David_i2012.pdf 1 353952DBC881BE2866978F99EE4A13D1 f2f216e2abed4c65918d72b4c017e7577fb6a81de655553b0ec903cea3e7ddb4 27cacc59-17b5-11ed-b6b8-001a4af901a5 20.500.12556/dirros/1e9d2311-8346-4525-a6bb-254c0261f0d7 https://dirros.openscience.si/Dokument.php?lang=slv&id=9620 Gozdarski inštitut Slovenije Acta Silvae et Ligni 0 0 0