ABSTRACT

The Brazilian bioenergy industry is well developed and has numerous highly productive Eucalyptus spp. clones, the wood of which may suit the timber industry. We screened the mechanical wood properties of six bioenergy Eucalyptus spp. clones from young forests to find ones suitable for the timber industry. We evaluated shear strength, parallel compressive strength, strength and stiffness on static bending, and wood density. Eucalyptus camaldulensis clones had low strength and stiffness for their wood density and are less suitable for timber products. However, clones from E. urophylla and E. urophylla × E. grandis had specific strength and stiffness close to the values reported for mature Eucalyptus wood. Their average density ranged from 0.54 g cm⁻³ to 0.68 g cm⁻³ and, while the lightest wood had properties close to those of mature Pinus elliottii trees, the clone with the densest wood produced material similar to mature E. urophylla. We conclude that these clones have distinct wood properties, each with different potential applications. With better understanding of this timber source, young clonal Eucalyptus forests could be an asset to the timber industry in Brazil, substituting pine wood and providing raw material close to the main consumer markets.

摘要

巴西生物能源产业发展良好，拥有众多高产桉树。克隆，其木材可能适合木材工业。我们筛选了六种生物能源桉树的机械木材特性。从年轻的森林中克隆，以找到适合木材工业的森林。我们评估了剪切强度、平行抗压强度、静态弯曲强度和刚度以及木材密度。Eucalyptus camaldulensis无性系的木材密度低，强度和刚度低，不太适合木制品。然而，来自E. urophylla和E. urophylla × E. grandis 的克隆具有接近成熟桉木报告值的比强度和刚度。它们的平均密度范围为 0.54 g cm ^-3到 0.68 g cm ^-3，虽然最轻的木材具有与成熟的白松树相似的特性，但具有最密木材的克隆产生的材料类似于成熟的尾叶松。我们得出结论，这些克隆具有不同的木材特性，每个都有不同的潜在应用。通过更好地了解这种木材来源，年轻的无性系桉树林可以成为巴西木材工业的资产，替代松木并提供靠近主要消费市场的原材料。