In the area of the forest reserve Panovec near Nova Gorica, we analysed the height growth of conifers at the level of individual trees. In the analysis, we used multitemporal data of aerial laser scanning from the years: 2006, 2009, 2015 and 2020. We identified 120 trees of selected tree species in the field and in the laser data: red pine (Pinus sylvestris, n = 30), green pine (Pinus strobus, n = 30), fir (Abies alba, n = 30) and douglas fir (Pseudotsuga menziesii, n = 30). We found that the average annual height increment in the considered period for fir was 0,27 ± 0,03 m, for green pine 0,33 ± 0,04 m, for red pine 0,54 ± 0,03 m and for Douglas fir 0,63 ± 0,05 m. The average annual height increment is statistically significantly different between tree species, except between fir and green pine, where we did not confirm statistically significant differences. The annual growth in height of the analysed trees is statistically significantly dependent on the height of the tree in 2006, except for the red pine. For green pine, red pine and douglas fir, we found that taller trees have a greater increase in height, while the opposite is true for fir. The annual height increment of red pine and douglas fir changed statistically significantly between 2006 and 2015, but this cannot be said for fir. In the period between 2009 and 2020, the annual increment in height changed statistically significantly for douglas fir, while we did not confirm this for the other trees.
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