Diameter and height structures in even aged stands of Austrian pine (Pinus nigra Arn.) on carbonate substrates in Bosnia
DOI:
https://doi.org/10.54652/rsf.2010.v40.i2.148Keywords:
even aged stands, Austrian pine (Pinus nigra Arn.), diameter structure, height structureAbstract
UDK 630*52:582.475(497.6)
Diameter and height structures of untreated even aged stands of Austrian pine (Pinus nigra Arn.) on carbonate substrates in Bosnia were used to assess their status. Data were collected from 130 sample plots in spatial distribution of these stands. Numerical parameters of these structures (average value, width of variability, standard deviation, coefficient of variability, skewness and kurtosis) were analyzed.
Diameter structures are unimodal, rounded and with exceptions they are positively asymmetric with less width variations in younger age and negatively asymmetric with greater width variations in older age. Height structures are unimodal and generally negatively asymmetric with greater width variations and negatively asymmetry in old age. A slight shift of lower limits of interval variations is characteristic for these structures as they age and in some cases of lack of trees in the higher classes. Diameter and height structure were moved to higher classes and diameter structure is characterized by a greater width of variations in better site conditions while the influence of site condition on the other numerical parameters is not clearly expressed.
The obtained results show some deviations from the rules of development of the even-aged stands. The established differentiation of diameter and height of trees and in some cases the lack of dominant trees can be attributed to the influence of good site conditions. The ability of Austrian pine trees to sustain shading and competition in good site conditions can also be credited to the sites, even if there was no adequate treatment.
References
IBRAHIMSPAHIĆ, A. (2004a): Regresione analize proizvodnih karakteristika jednodobnih nenjegovanih šumskih zasada crnog bora (Pinus nigra Arn.) na karbonatnim supstratima u Bosni. Magistarski rad. Šumarski fakultet u Sarajevu.
IBRAHIMSPAHIĆ, A. (2004b): Izrada dispozicije bonitetnih razreda staništa jednodobnih zasada crnog bora (Pinus nigra Arn.) na karbonatnim supstratima u Bosni. Radovi Šumarskog fakulteta Univerziteta u Sarajevu, No 1- knjiga XXXIV.
EKINOVIĆ, S. (1997): Metode statističke analize u Microsoft Exscel-u. Mašinski fakultet u Zenici. Univerzitet u Sarajevu.
KOPRIVICA, M. (1997): Šumarska biometrika, knjiga I. Institut za šumarstvo, Beograd.
MATIĆ, V. (1980): Prirast i prinos šuma, udžbenik. Šumarski fakultet Univerziteta u Sarajevu.
PAVLIČ, J. (1999): Metodika premjera i registrovanja podataka u jednodobnim zasadima smrče (Picea abies Karst.), bijelog bora (Pinus sylvestris L.) i crnog bora (Pinus nigra Arn.) u Bosni i Hercegovini. Radovi Šumarskog fakulteta Univerziteta u Sarajevu, No 1- knjiga XXIX.
PINTARIĆ, K. (2002): Šumsko-uzgojna svojstva i život važnijih vrsta šumskog drveća. Udruženje šumarskih inženjera i tehničara Federacije Bosne i Hercegovine.
PRANJIĆ, A. & LUKIĆ, N. (1997): Izmjera šuma, udžbenik. Šumarski fakultet Sveučulišta u Zagrebu.
STAMENKOVIĆ, V. & VUČKOVIĆ, M. (1988): Prirast i proizvodnost stabala i šumskih sastojina, udžbenik. Šumarski fakultet Univerziteta u Beogradu.
