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All Journal JURNAL HUTAN LESTARI JURNAL TEKNOLOGI LINGKUNGAN Biota: Jurnal Ilmiah Ilmu-Ilmu Hayati Agrointek Seruni - Seminar Riset Unggulan Nasional Inoformatika dan Komputer Jurnal IPTEK Konversi BERITA BIOLOGI JURNAL BIOLOGI INDONESIA JURNAL PERTANIAN Jurnal Leverage, Engagement, Empowerment of Community (LeECOM) Wood Research Journal : Journal of Indonesian Wood Research Society Wood Research Journal : Journal of Indonesian Wood Research Society International Journal of Business, Law, and Education Abdimas Indonesian Journal Jurnal Ilmu Kehutanan Journal of Tourism, Culinary, and Entrepreneurship (JTCE)
Joko Sulistyo
Bagian Teknologi Hasil Hutan, Fakultas Kehutanan, Universitas Gadjah Mada
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Journal : JURNAL HUTAN LESTARI

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VARIASI AKSIAL DAN RADIAL DIMENSI SERAT, SIFAT FISIKA DAN MEKANIKA KAYU JABON (Neolamarckia cadamba Miq.) DI HUTAN RAKYAT KABUPATEN SLEMAN, YOGYAKARTA Ridho, Muhammad Rosyid; Marsoem, Sri Nugroho; Listyanto, Tomy; Sulistyo, Joko
JURNAL HUTAN LESTARI Vol 12, No 1 (2024): JURNAL HUTAN LESTARI
Publisher : Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jhl.v12i1.76292

Abstract

Utilization of fast-growing wood species needs to be increased to support the sustainability of wood industry in Indonesia. Burflower (Neolamarckia cadamba Miq.) is a fast-growing wood species that widely planted in some community forest on Java Island recently, including in Yogyakarta. This study aims to provide information about burflower wood quality, based on its fiber dimension, physical and mechanical properties. The axial and radial variation of wood properties within stem in the axial and radial direction also examined. Three (3) free defects of burflower trees from community forest in Sleman regency, Yogyakarta, have been felled and cut into samples. The results show that green moisture content, air-dried density, and oven-dried density were varied in the axial direction. Meanwhile in the radial direction, fiber length, density, and static bending strength increase from the pith towards the bark. In contrast, green moisture content decreases from the pith towards the bark.Keywords: density, fast-growing, fiber length, modulus of elasticity, shrinkage.  AbstrakPemanfaatan jenis kayu cepat tumbuh perlu ditingkatkan untuk mendukung kelanjutan industri perkayuan di Indonesia. Jabon (Neolamarckia cadamba Miq.) adalah salah satu jenis kayu cepat tumbuh yang banyak ditanam di hutan rakyat Pulau Jawa pada beberapa tahun terakhir, termasuk di Yogyakarta. Penelitian ini bertujuan untuk memberikan informasi terkait kualitas kayu jabon di hutan rakyat, berdasarkan dimensi serat, sifat fisika dan mekanikanya. Variasi aksial dan radial sifat kayu dalam satu batang pohon juga diamati. Sebanyak 3 batang pohon jabon bebas cacat dari hutan rakyat di Kabupaten Sleman, Yogyakarta, ditebang dan dibuat sampel uji. Hasil pengamatan menunjukkan bahwa kadar air kering udara (KAKu), kerapatan kering udara (KKu), dan kerapatan kering oven (KKo) bervariasi pada arah aksial. Sementara itu pada arah radial, variasi terlihat pada panjang serat, kerapatan, dan kekuatan lengkung statis yang menunjukkan pola peningkatan dari empulur menuju kulit. Sebaliknya, kadar air segar menurun dari empulur menuju kulit.Kata kunci: cepat tumbuh, kerapatan, modulus elastisitas, panjang serat, penyusutan
TEGANGAN PERTUMBUHAN PERMUKAAN KAYU JABON UMUR 5 TAHUN DARI HUTAN RAKYAT DI SLEMAN, YOGYAKARTA Ridho, Muhammad Rosyid; Marsoem, Sri Nugroho; Listyanto, Tomy; Sulistyo, Joko
JURNAL HUTAN LESTARI Vol 12, No 4 (2024): JURNAL HUTAN LESTARI
Publisher : Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jhl.v12i4.79496

Abstract

Burflower (Neolamarckia cadamba Miq.) is a fast-growing wood species which has been planted in some community forest on Java Island in recent years. This study aims to examine the surface growth stress of 5-year-old burflower wood from a community forest in Sleman, Yogyakarta. In addition, the axial variation of the surface growth stress within the stem also studied. The strain gauges method was conducted to determine the surface-released strains (SRS) in the stem periphery. The results show that the mean value of longitudinal SRS was -241,58 μɛ (-239 "“ 1.141 μɛ), while tangential SRS was -208,89 μɛ (-564 "“ 18 μɛ). These SRS values were considered low (under 650 μɛ) therefore the burflower wood theoretically has no potential for processing defects. There is no significant difference in SRS value within stem in the axial direction. This result indicates that the SRS measurement for 5-year-old burflower wood can be carried out only in the breast high of standing trees. Keywords: Periphery, processing-defects, strain gauges, strains Abstrak Jabon (Neolamarckia cadamba Miq.) adalah spesies kayu cepat tumbuh yang banyak ditanam di hutan rakyat di Pulau Jawa dalam beberapa tahun terakhir. Penelitian ini bertujuan untuk mempelajari tegangan pertumbuhan permukaan kayu jabon yang berumur 5 tahun dari hutan rakyat di Kabupaten Sleman, Yogyakarta. Selain itu, variasi aksial dari tegangan pertumbuhan dalam satu batang pohon juga dipelajari. Metode strain gauges digunakan untuk menentukan pelepasan regangan permukaan (PRP) pada periferi batang pohon. Hasil penelitian menunjukkan nilai rerata PRP longitudinal yaitu 241,58 μɛ (-239 "“ 1.141 μɛ), sedangkan PRP tangensial sebesar -208,89 μɛ (-564 "“ 18 μɛ). Nilai PRP yang relatif rendah (di bawah 650 μɛ) menunjukkan bahwa kayu jabon secara teori tidak berpotensi mengalami cacat pengolahan. Tidak ditemukan adanya perbedaan signifikan nilai PRP dalam satu pohon pada arah aksial. Hasil ini mengindikasikan bahwa pengukuran PRP pada kayu jabon umur 5 tahun cukup dilakukan pada bagian setinggi dada saja pada saat pohon masih berdiri. Kata Kunci: Cacat pengolahan, periferi, regangan, strain gauges
Co-Authors Adrie Oktavio Anggara, Jaclyn Regina Angkadjaja, Belinda Manuela Evi Triana Fia Sri Mumpuni Gaby, Cecilia Gunawan, Fayola Feivel Hamidy, Raymond Heroney, Hevenney Vianie Hesti Wijayanti Irra Chrisyanti Dewi Jacob, Alexander Michael Joko Sulistyo Muarif, Muarif Muarif, Muarif Muhammad Rosyid Ridho Naiola, Elidar Napitupulu, Rostiati NR Nikkuni, Sayuki Nyoman Puspa Asri Oki Krisbianto Praharnata, Praharnata Purnama Dewi R. Sapto Hendri Boedi Soesatyo Rachman, Hans Rahmaningsih, Heni Ramli, Adilah Md Rini Handayani Rita Dwi Rahayu Sri Nugroho Marsoem Swee Ling, Joanna Ho Tomy Listyanto Widiasih, Lutfi Erlita Widiasih, Lutfi Erlita Winata, Kezia Jasmine Yati Sudaryati Soeka Yoewono, Jessica Renata Yu, Shin Ying