Microfibril Angles and Crystalline Properties of Reaction Woods in Agathis and Sumatran Pine Woods


  • Byantara Darsan Purusatama Institute of Forest Science, Kangwon National University
  • Fauzi Febrianto Department of Forest Products, Faculty of Forestry, IPB University
  • Wahyu Hidayat Department of Forestry, Faculty of Agriculture, University of Lampung
  • Nam Hun Kim Department of Forest Biomaterials Engineering, College of Forest and Environmental Sciences, Kangwon National University




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 


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How to Cite

Purusatama, B. D., Febrianto, F. ., Hidayat, W., & Kim, N. H. (2023). Microfibril Angles and Crystalline Properties of Reaction Woods in Agathis and Sumatran Pine Woods. Jurnal Sylva Lestari, 12(1), 27–37. https://doi.org/10.23960/jsl.v12i1.792





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