Studies on Decision of Selection Indexes for Quality Breeding of Eucalypt Pulpwood. (VII). Relationship between wood and pulp properties brought by their within-tree variations on E. globulus.

The relationship between wood and kraft pulp properties was examined using within-tree variation on two trees of Eucalyptus globulus grown in Western Australia. Many pulp properties were related to wood properties analysed by chemical determination of wood components and their structures, at 1% level of significance. Multiple regression analysis of pulp properties on wood properties revealed significant independent variables as follows : 1. Pulp yield : lignin content, holocellulose content.2. Sheet density : extractives content, hemicellulose content, lignin S (syringyl) /G (guaiacyl) ratio, mannose mol.%.3. Burst factor : lignin S/G ratio, cellulose content/hemicellulose content, extractives content, holocellulose content.4. Breaking length : lignin S/G ratio, cellulose content/hemicellulose content.5. Tear factor : basic density.6. Folding endurance : extractives content.7. Unbleached brightness : extractives content.8. Kapper number : extractives content, arabinose mol.%, basic density.Significant regression equations at 1% level were obtained for all pulp properties except folding endurance (5% level) and tear factor (10% level). And we also look forward to applying them for prediction of whole-tree pulp properties by an increment core from the representative height without cutting a tree.