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All Journal Global Forest Journal Indonesian Journal of Forestry Research
Rahman, Mohamad Miftah
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Materials Science & Nanotechnology

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GROWTH AND WOOD TRAITS EVALUATION OF 15-YEAR-OLD TENGKAWANG (Shorea spp.) TREE STANDS IN GUNUNG WALAT UNIVERSITY FOREST, WEST JAVA, INDONESIA Fifi Gus Dwiyanti; Rosdayanti, Henti; Yulita, Kusumadewi Sri; Rachmat, Henti Hendalastuti; Ayyasy, Yahya; Muharam, Karima Fauziah; Rahman, Mohamad Miftah; Adzkia, Ulfa; Siregar, Iskandar Zulkarnaen
Indonesian Journal of Forestry Research Vol. 11 No. 2 (2024): Indonesian Journal of Forestry Research
Publisher : Association of Indonesian Forestry and Environment Researchers and Technicians

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59465/ijfr.2024.11.2.243-258

Abstract

Gunung Walat University Forest (GWUF) in Sukabumi Regency, Indonesia, plays a crucial role in providing various ecosystem services. Five important Shorea trees, i.e., S. stenoptera, S. mecisopteryx, S. pinanga, S. palembanica, and Shorea leprosula have been planted in GWUF as an effort for its conservation and object of research. An evaluation of the adaptability and suitability of these species to the GWUF ecosystem, as well as their wood characteristics, needs to be carried out regularly. Therefore, the study aimed to examine the growth performances and physical wood properties of five Shorea species, i.e., Shorea stenoptera, S. mecisopteryx, S. pinanga, S. palembanica, and S. leprosula at the age of 15-year-old planted in GWUF. The results indicated that S. leprosula exhibited the best growth performance in terms of average diameter (19.64 cm), volume (0.27 m3), slenderness (126.58), and wood density (0.94 g/cm3), and S. stenoptera showed the best performance in average height (23.35 m). While the poor performance was shown by S. palembanica in terms of average diameter (6.73 cm), height (11.15 m), volume (0.02 m3), wood density (0.87 g/cm3), and specific gravity (0.45), and S. stenoptera in terms of average slenderness (202.73). In addition, significant differences in tree height, diameter, volume, wood density, specific gravity, and moisture content were found in S. palembanica compared with other species. The relationship between the growth and physical wood properties parameters varied between species. The study revealed that planting the five Shorea species in GWUF is suitable for increasing vegetation cover and conserving the species.
Sorghum biomass: A sustainable alternative for particleboard production - A mini review Sutiawan, Ikmal; Sutiawan, Jajang; Surya Kusumah, Sukma; Kartikawati, Aprilia; Martha, Resa; Miftah Rahman, Mohamad
Global Forest Journal Vol. 3 No. 02 (2025): Global Forest Journal
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/gfj.v3i02.19506

Abstract

particleboard production, offering an eco-friendly alternative to conventionalwood-based composites. This mini-review synthesizes recent research on thechemical, physical, mechanical, and durability properties of particleboards madefrom sorghum residues, including bagasse, stalks, and leaves. Quantitativefindings show that sorghum particleboards can achieve densities ranging from0.56 to 1.25 g/cm³, modulus of rupture (MOR) up to 34.1 MPa, modulus ofelasticity (MOE) up to 5270 MPa, and internal bond (IB) strength up to 1.92 MPa,meeting the JIS A5908:2003 Type 8 standard in several cases. Moisture content(MC) and thickness swelling (TS) can be optimized to meet dimensional stabilityrequirements through pre-treatment, adhesive formulation, and pressingconditions. Chemically, sorghum biomass has moderate to high cellulose (30–46%) and hemicellulose (21–34%) contents, with lower lignin and ash levels thantypical wood, favoring bonding and composite integrity. Synthetic adhesives (UF,PF, pMDI) and natural alternatives (citric acid, maleic acid, sucrose) have beenexplored, with several formulations showing improved water resistance andbiodegradation resistance. Enhanced durability, including termite and fungalresistance, has been observed, particularly in bio-based adhesive boards.However, challenges remain in scaling production and standardizing raw materialquality. Future research should prioritize optimizing production methods andimproving sorghum-based particleboards' mechanical and durability properties,enabling their use in a wider range of applications.
Co-Authors Adzkia, Ulfa Ayyasy, Yahya Fifi Gus Dwiyanti Henti Rosdayanti, Henti ISKANDAR ZULKARNAEN SIREGAR Kartikawati, Aprilia KUSUMADEWI SRI YULITA Martha, Resa Muharam, Karima Fauziah Rachmat, Henti Hendalastuti Surya Kusumah, Sukma Sutiawan, Ikmal Sutiawan, Jajang