şahin, abdurrahman artvin çoruh university - faculty of forestry - department of forest engineering, Artvin, Turkey , kahriman, aydın artvin çoruh university - faculty of forestry - department of forest engineering, Artvin, Turkey , göktürk, aşkın artvin çoruh university - faculty of forestry - department of forest engineering, Artvin, Turkey

Estimating diameter at breast height (DBH) from diameter at stump height (DST) in triple mixed stands in the region of Artvin in Turkey

18644

Diameter at breast height is used as an independent variable in the calculation of most tree or stand parameters because it can be measured easily and has high correlation with tree variables. But, it is necessary to estimate the size of the DBH of the tree concerned to have knowledge of the tree which has been separated from the area. In this study, DST-DBH relationships were investigated on stands where Oriental Spruce (So), Scots Pine (Ps) and Eastern Black sea Fir (Fb) were mixed. For this purpose, 206 trees (69 So, 69 Ps and 68 Fb) were used which were cut from 23 different sample areas taken in fully closed SoPsFb and PsSoFb stands in Artvin. According to the statistics analysis; models that best explain the variability of the DBH are power for spruce, quadratic for pine and linear models for fir. These models can explain the variance of DBH in triple mixed stands by 95.2% for spruce, 96.5% for pine and 96.4% for fir, and standard errors of models are 1.850, 1.598 and 1.643 respectively. As a result, these models, which at a certain height of success in predicting DBH, can be used by practitioners at fully closed triple mixed stands in Artvin.

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Diameter at breast height , diameter at stump height , regression analysis , triple mixed stands

Forestist

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