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All Journal Jurnal Sylva Lestari
Byantara Darsan Purusatama
Institute of Forest Science, Kangwon National University
Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Energy Environmental Science Materials Science & Nanotechnology

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Microfibril Angles and Crystalline Properties of Reaction Woods in Agathis and Sumatran Pine Woods Byantara Darsan Purusatama; Fauzi Febrianto; Wahyu Hidayat; Nam Hun Kim
Jurnal Sylva Lestari Vol. 12 No. 1 (2024): January
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jsl.v12i1.792

Abstract

The microfibril angles (MFAs), relative crystallinity index (RC), and crystallite width (CrW) of compression wood (CPW), lateral wood (LTW), and opposite wood (OPW) in Agathis (Agathis loranthifolia) and Sumatran Pine (Pinus merkusii) stem wood were observed and compared to obtain valuable information on wood quality for effective utilization. The iodine staining method and optical microscopy were applied to measure the MFA in the tangential section. RC and CrW were analyzed with an X-ray diffraction technique. CPW had the largest MFA and the smallest RC in both species. In Agathis, LTW and OPW had comparable MFA, RC, and CrW, whereas the CrW of CPW was the smallest. In Sumatran pine, there was a significant difference in MFA and RC between LTW and OPW. CPW, LTW, and OPW showed comparable CrW. The MFA decreased and RC increased from near the pith to bark in both species. The CrW increased from near the pith to the bark of Sumatran pine, whereas it was constant in Agathis. In conclusion, MFA and RC could be used to identify CPW, LTW, and OPW in both species. There were distinctive MFA and RC properties between reaction wood in both species. Keywords: Agathis loranthifolia, crystalline properties, microfibril angles, Pinus merkusii, reaction wood 
Co-Authors Fauzi Febrianto Fauzi Febrianto Go Un Yang Jong Ho Kim Nam Hun Kim Seung Hwan Lee Wahyu Hidayat