Evaluarea calității lemnului arborilor de molid afectați de putregai prin metoda măsurării rezistențelor electrice

Abstract

The aim of this paper was to test the Rotfinder® device which use the method of measuring electrical resistances of the wood. Research was conducted in the north of the Eastern Carpathians, in four Norway spruce plots. A total of 1046 healthy standing trees (according with visual inspection) were analyzed. Between 5% and 16% of trees were affected by root rot, the highest values being recorded in the first 5 classes indicated by the Rot-finder® device. The relationship between the value indicated by the Rotfinder® device and the proportion occupied by the root rot in the cross-section of the Norway spruce trees is given by a logarithmic equation. The correlation is very strong and very significant (r = 0.956***). The correlation between the value indicated by the Rotfinder® and the proportion occupied by the root rot in the cross-section have a considerable practical importance because it is possible to estimate the proportion of root rot in the cross-sectional area for different forest areas.

Keywords

• picea abies
• wood
• quality
• rotfinder®
• electrical resistance
• root rot
• heterobasidion