DIGITALNA ARHIVA ŠUMARSKOG LISTA
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| ŠUMARSKI LIST 3-4/2023 str. 16 <-- 16 --> PDF |
and III, respectively. In the medium site index class, the total volume of stand was 139.2, 231.6, 330.4, 444.7 and 590.6 m3/ha at age 60 and 229.5, 380.9, 536.2, 713.7 and 935.0 m3/ha at age 100 corresponding to density classes 2.0, 4.0, 6.0, 8.0 and 10.0, respectively. Mean annual volume increment in Calabrian pine stands increases across all site index classes and stand densities up to a certain age, reaches its maximum and then begins to decline around a certain age (55- 60 in SI class I, 65-70 in SI class II and 70-75 in SI class III). Mean annual volume increment also increases with increasing stand density and better site quality (Figure 5). Mean annual volume increment at normal stand density of 8.0 was 10.33, 7.41 and 4.38 m3/ha at age 60 and 9.89, 7.14 and 4.24 m3/ha at age 100 for site index classes I, II and III, respectively. The relationship between CAI and MAI was also examined for each SI class separately at the normal stand density of 8.0 in the Calabrian Pine yield table (Figure 6). MAI slowly declines after peaking at the 55-60 years in SI class I, 65-70 years in SI class II and 70-75 years in SI class III. We also |