DIGITALNA ARHIVA ŠUMARSKOG LISTA
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| ŠUMARSKI LIST 1-2/2018 str. 42 <-- 42 --> PDF |
In the thinning at the age of 32, out of the total 115.1 m3∙ha-1of the trees marked for felling, almost 100 m3∙ha-1 were in the diameter range of 10 to 20 cm. However, in the thinning performed at the age of 40, out of the total 142.3 m3∙ha-1 of the trees marked for felling, over 110 m3∙ha-1 were found in the diameter range of 10 to 20 cm and about 30 m3∙ha-1 was in the diameter range of 20 to 25 cm. The effects of thinning on trees and stand increment – Utjecaj prorjeda na prirast stabala i sastojine In the period after the first thinning, between the ages of 33 and 40, the current annual diameter increment determined by a detailed analysis of the representative of the 100 thickest trees in the stand was higher by an average of 55% compared to the period before the thinning, between the ages of 25 and 32. The differences were highly statistically significant (p<0.001). In the period after the thinning, the current annual height increment of the representative tree was higher by an average of 9% compared to the study period before the thinning, but the differences were not statistically significant. The current annual diameter increment determined by a detailed analysis of the representative of the 400 thickest trees was, in the period between the ages of 33 and 40, higher by an average of 4% compared to the period before the thinning, but the differences were not statistically significant. After the thinning, the current annual height increment of the representative tree was higher by an average of 18% compared to the period before the thinning, and the differences were statistically significant (Table 5, Graph 6). |