تقدير حجم و عامل القشرة لأشجار البلوط الفليني النامي في غابات كروش الجزائرية

Abstract EN

This study was conducted in Kroosk Forest in Algeria to estimate the bark factor and its volume for Quercus suber L.

Fifty nine circular sample with a diameter of 15.22 m were taken though a managed survey which was done in the forest .

Form the samples, data about the diameter at breast height above and below the bark and the height of all trees were recorded, and for the determination of bark, the following relationship was followed : Form the above equation, the bark was obtained which is (0.862).

As the study concerned the bark factor and its volume, the multiple regression models for estimating the volume of bark at different classes above the bark were used, and the following equation with coefficient of determination equation (0.88) and standard deviation of the mean (5.188) obtain as follows : Vb1 = -16.84 + 0.792 D0 + 0.0036 D20 In addition, the percent of bark for the total forest was also determined.