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<p>Clonal <i>Eucalyptus</i> wood has been grown in the Maâmora forest area (North-West of Morocco) as a fiber source, particularly for pulpwood production. This study aims to evaluate the lumber yields, air–drying kinetics, and drying defects–including shrinkage, bowing, end splits, surface checks, and cracks–of two <i>Eucalyptus</i> clones (<i>Eucalyptus grandis</i> and <i>E. camaldulensis</i>) that are 9 years old and taken from the Maâmora forest. The obtained results show that the lumber yield of <i>E. grandis</i> clone is more important than that of <i>E. camaldulensis</i> clone, and its timber is the least deformed and cracked. The boards from both clones exhibited mean shrinkage values in the tangential and radial directions of 9.229 and 5.850% for <i>E. grandis</i> clone, and 10.862 and 7.128% for <i>E. camaldulensis</i> clone, respectively. The coefficient of anisotropy for boards of both clones was within the normal range, with values of 1.575 for <i>E. grandis</i> clone and 1.522 for <i>E. camaldulensis</i> clone. Additionally, the drying rate of <i>E. grandis</i> timber is higher than that of <i>E. camaldulensis</i>. There are highly significant correlations (<i>p</i> &lt; 0.01) between lumber yield and both small-end diameters and taper of logs for two <i>Eucalyptus</i> clones. Moreover, there are strong positive correlations between boards defects and apparent wood density of both <i>Eucalyptus</i> clones. Furthermore, the ratio of dry lumber yield to the green lumber yield for both clones is important, averaging approximately 84.66% for <i>E. grandis</i> clone and 83.69% for <i>E. camaldulensis</i> clone, indicating the potential for value-added solid wood production from clonal <i>Eucalyptus</i>.</p>

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Valorization of clonal Eucalyptus wood via sawing and air drying: product yields and drying defects

  • 期刊论文

  • 发表日期：

    2026年4月17日

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  • Mahyoub Amer,
  • Bousselham Kabouchi,
  • Abderrahim Famiri,
  • Mohsine Ziani,
  • Abdelwahed Fidah

摘要

Clonal Eucalyptus wood has been grown in the Maâmora forest area (North-West of Morocco) as a fiber source, particularly for pulpwood production. This study aims to evaluate the lumber yields, air–drying kinetics, and drying defects–including shrinkage, bowing, end splits, surface checks, and cracks–of two Eucalyptus clones (Eucalyptus grandis and E. camaldulensis) that are 9 years old and taken from the Maâmora forest. The obtained results show that the lumber yield of E. grandis clone is more important than that of E. camaldulensis clone, and its timber is the least deformed and cracked. The boards from both clones exhibited mean shrinkage values in the tangential and radial directions of 9.229 and 5.850% for E. grandis clone, and 10.862 and 7.128% for E. camaldulensis clone, respectively. The coefficient of anisotropy for boards of both clones was within the normal range, with values of 1.575 for E. grandis clone and 1.522 for E. camaldulensis clone. Additionally, the drying rate of E. grandis timber is higher than that of E. camaldulensis. There are highly significant correlations (p < 0.01) between lumber yield and both small-end diameters and taper of logs for two Eucalyptus clones. Moreover, there are strong positive correlations between boards defects and apparent wood density of both Eucalyptus clones. Furthermore, the ratio of dry lumber yield to the green lumber yield for both clones is important, averaging approximately 84.66% for E. grandis clone and 83.69% for E. camaldulensis clone, indicating the potential for value-added solid wood production from clonal Eucalyptus.