关键词: 机械加工性能, 家系, 树龄, 尾巨桉

Abstract: In order to provide references for high-efficient and reasonable utilization of Eucalyptus urophylla×E. grandis woods, taking 4-year-old, 6-year-old and 8-year-old woods of E. urophylla×E. grandis DH32-26 and DH32-29 families as research objects, machining properties including planing, sanding, milling and drilling were measured and evaluated. Differences of comprehensive machining properties of woods among different families and ages were compared. Results showed that wood planing and sanding properties of DH32-26 and DH32-29 families at different ages were excellent, and milling and drilling properties were good. With increase of age, wood planing, sanding and drilling properties of two families improved, while milling property did not differ significantly. Woods of DH32-26 and DH32-29 families had extremely significant differences in sanding property, had significant differences in planing and drilling properties, and had no significant differences in milling property. Woods of DH32-26 family had better drilling property and weaker planning and sanding properties than woods of DH32-29 family. Comprehensive machining properties of 4-year-old and 6-year-old woods from different families were similar, while 8-year-old woods of DH32-29 family were better than 8-year-old woods of DH32-26 family.

Key words: machining property, family, tree age, Eucalyptus urophylla×E. grandis;