Diameter at breast height is used as anindependent variable in the calculation of most tree or stand parametersbecause 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 tohave knowledge of the tree which has been separated from the area. In thisstudy, DST-DBH relationships were investigated on stands where Oriental Spruce(So), Scots Pine (Ps) and Eastern Black sea Fir (Fb) were mixed. For thispurpose, 206 trees (69 So, 69 Ps and 68 Fb) were used which were cut from 23different sample areas taken in fully closed SoPsFb and PsSoFb stands inArtvin. According to the statistics analysis; models that best explain thevariability of the DBH are power for spruce, quadratic for pine and linearmodels for fir. These models can explain the variance of DBH in triple mixedstands by 95.2% for spruce, 96.5% for pine and 96.4% for fir, and standarderrors of models are 1.850, 1.598 and 1.643 respectively. As a result, thesemodels, which at a certain height of success in predicting DBH, can be used bypractitioners at fully closed triple mixed stands in Artvin.Keywords: Diameter at breast height,diameter at stump height, regression analysis, triple mixed stands in Artvin.
Cite this paper as: Şahin, A., Kahriman, A., Göktürk, A., 2019. Estimating diameter at breast height (DBH) from diameter at stump height (DST) in triple mixed stands in the region of Artvin in Turkey. Forestist 69(1): 61-67.