Abstract
ABSTRACT Cork quality indices were characterised in eight cork oak stands in the production region of Oranie (North-West, Algeria), based on field sampling of 75 trees/stand. The superposition of the quality indices provided by the Coveless CQ05™ onto the measurements of the technological cork features carried out in the laboratory showed a perfect homogenisation between the two processes. The best classes of quality indices (QI-A (19.5, 19, 12.75, 12)) include thickness (26.90 mm), annual growth (2.11 mm.year−1), the volumetric density (198.94 kg.m−3) and the porosity coefficient (2.65%). Regarding the poor quality indices classes (IQ-C (1.5), these averages tend to increase so as to reduce the market value of cork, in particular the density (355.11 kg.m−3), porosity (7.50%) and defects (70% for earthy cork and 30% for inclusions) The results showed the preponderant role of quality indices in the good marketing of cork and the classification of production areas.
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