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Licensed Unlicensed Requires Authentication Published online by De Gruyter May 13, 2022

Among-family variations of direct measurement values for chemical and pulp properties in 4-year-old Eucalyptus camaldulensis half-sib families in Thailand

Ulrich Christopher Moussavou Mboumba, Yudai Tanaka, Ikumi Nezu, Futoshi Ishiguri ORCID logo, Sapit Diloksumpun, Jun Tanabe, Jyunich Ohshima, Kazuya Iizuka and Shinso Yokota


Amounts of wood chemical components (organic solvent extracts, Klason lignin, and holocellulose) and kraft pulp characteristics (yield and kappa number) were directly determined for 32 trees from eight half-sib Eucalyptus camaldulensis Dehnh. families in second generation of elite trees selected in Thailand. The mean values of all trees were 1.4 % for organic solvent extracts, 21.3 % for Klason lignin, 86.1 % for holocellulose, 44.4 % for kraft pulp yield, and 7.2 for kappa number, respectively. While repeatability values of growth traits and basic density were moderate to high (0.18 to 0.51), those in wood chemical components and kraft pulp characteristics showed quite low values (less than 0.10). No correlation coefficients were found between measured traits, except between stem diameter and tree height. Thus, it is concluded that selection of E. camaldulensis families with superior growth traits is suitable for production of raw material of pulp and paper in respect to quantity and quality of wood.

Funding source: Kasetsart University Research and Development Institute

Funding statement: This research was financially supported by fundamental research funds of Utsunomiya University, Japan and in part by the Kasetsart University Research and Development Institute, Thailand.


We thank the staff and students of the Faculty of Forestry, Kasetsart University, and School of Agriculture, Utsunomiya University for their help in field sampling and the laboratory experiments.

  1. Conflict of interest: The authors declare that they have no conflicts of interest.


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Received: 2022-02-16
Accepted: 2022-05-07
Published Online: 2022-05-13

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