Radial variation of the content of cellulose and lignin in selected softwood species
Journal Title: Annals of WULS, Forestry and Wood Technology; Zeszyty naukowe SGGW - Year 2017, Vol 100, Issue
Abstract
Radial variation of the content of cellulose and lignin in selected softwood species. This study determined radial variation of the content of cellulose and lignin on the cross-section of chosen softwood species. Research was carried out on the wood of pine (Pinus sylvestris L.), spruce (Picea abies (L.) Karst.) and larch (Larix decidua Mill.) originating from dominant trees at the age of 104-106 years, growing in the same habitat and climatic conditions. The test material consisted of approximately 30 mm thick discs. 4 cm wide slats, intended for determination of the chemical composition, were cut out from the discs in the north-south direction. The measurements of the content of cellulose and lignin were taken from the 25-year incremental zones, counting from the core to the circumference. Having analysed the radial variation of cellulose content in the zones determined on the cross-section, the authors observed that it demonstrated some fluctuations with an upward trend in the direction from the core to the circumference. On the other hand, the highest lignin content was characteristic of juvenile wood (of close-to-the-core zone) and decreased towards the circumference.
Authors and Affiliations
Magdalena Czajka, Ewa FABISIAK
Keywords
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