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ŠUMARSKI LIST 11-12/2016 str. 42     <-- 42 -->        PDF

The descriptive statistics of 292 sample trees’ traits were depicted in Table 2. The average dbh and tree height for the study area were 24.6 cm and 13.9 m, respectively.   The observed values of the above-ground biomass for the tree components were plotted against the dbh in Figure 2. It can be observed that the above-ground biomass values strongly follow an exponential relationship between dbh and tree height for all components.
Using dbh and tree height, the 12 different allometric equations were tested and the results were shown in Table 3 for the tree components above-ground biomass. The results of regression analysis showed that both estimators used in the selected models were statistically significant (p<0.05) (Table 3). However, the coefficients of parameters of the model numbers 3, 4, 6, 7 and 8 for branches, the model numbers 3, 4, 6, 7 and 8 for barks, the model numbers 3, 4 and 7 for stems and the model numbers 3, 4, 6, 7 and 8 for needles were not significant estimators (p > 0.05). Therefore, the above models were eliminated and excluded from the final model evaluation.