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All Journal Jurnal Ilmu Kehutanan Jurnal Manusia dan Lingkungan
T.A. Prayitno
Fakultas Kehutanan, Universitas Gadjah Mada
Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Environmental Science Social Sciences

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Sifat Papan Laminasi Kayu Randu (Ceiba pentandra (L.) Gaertn) dengan Variasi Pola Gergajian Lamina dan Arah Lapisan Muhammad Navis Rofii; Prasetyo Prasetyo; Tomy Listyanto; Annisa Primaningtyas; Yustinus Suranto; T.A. Prayitno; Ragil Widyorini
Jurnal Ilmu Kehutanan Vol 16 No 1 (2022): Maret
Publisher : Fakultas Kehutanan Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2090.435 KB) | DOI: 10.22146/jik.v16i1.1739

Abstract

Kapok wood (Ceiba pentandra (L.) Gaertn) is a low-density wood species that can become a light construction material in the form of laminated timber products. This study aimed to understand the properties of laminated timber from kapok wood at different sawing patterns of laminae and core layer orientation. This study used kapok wood produced from community forests and PVAc (Polyvinyl Acetate) resin as the binder to produce laminated timber. The laminated boards were manufactured from dried laminas, measuring 100 x 9.5 x 1.7 cm, and were glued together with the resin before being pressed and clamped with the pressure of 1 MPa for 12 hours. The dimension of the final laminated board was 100 x 38 x 5 cm. Before being cut for the physical and mechanical properties tests, the laminated boards were conditioned at room temperature for a week. The results indicated that sawing patterns had insignificant effects on moisture content, density, static bending properties, and bonding strength of laminated boards. The core layer orientation had a significant effect on the density and the modulus of rupture. Generally, laminated board from kapok wood with the parallel grain direction of the core layer resulted in higher static bending properties and...
VARIASI GENETIK SIFAT-SIFAT KAYU UJI KETURUNAN ACACIA MANGIUM UMUR 5 TAHUN DI WONOGIRI, JAWA TENGAH (Genetic variation of wood properties in progeny trial of Acacia mangium on 5 years old in Wonogiri, Central Java) Mudji Susanto; Mohammad Naiem; Eko Bhakti Hardiyanto; T.A. Prayitno
Jurnal Manusia dan Lingkungan Vol 20, No 3 (2013): November
Publisher : Pusat Studi Lingkungan Hidup Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jml.18499

Abstract

ABSTRAKUji keturunan A. mangium generasi pertama dari Papua New Guinea and Queensland-Australia telah dibangun di Wonogiri - Jawa Tengah pada Desember 1993. Seleksi pohon di dalam famili telah dilakukan menggunakan variabel pertumbuhan, namun belum menggunakan variabel sifat-sifat kayu.  Tujuan dari penelitian ini adalah untuk mengetahui pengaruh provenans maupun famili terhadap keragaman diameter dan sifat-sifat kayu A. mangium tersebut pada umur 5 tahun. Hasil penelitian menunjukkan bahwa berat jenis kayu tergolong sedang yaitu rata-rata sebesar 0,44 dan panjang serat tergolong serat pendek yaitu rata-rata sebesar 1,04 mm. Di uji keturunan A. mangium tersebut terdapat keragaman antar famili di dalam provenans dan keragaman antar provenans pada sifat prsentase kayu teras, berat jenis kayu, dan kadar air.  Heritabilitas individu untuk diameter batang dan persentase kayu teras sangat rendah (h2i=0,03 untuk diameter dan h2i=0,05 untuk persentase kayu teras), sementara sifat-sifat kayu mempunyai heritabilitas individu yang tergolong rendah  sampai tinggi yaitu h2i=0,10-0,56. Hasil dari penelitian tersebut mengindikasikan bahwa seleksi pohon menggunakan sifat-sifat kayu seharusnya dilakukan untuk meningkatkan kualitas kayu.  ABSTRACTFirst generation (F-1) of progeny trial of Acacia mangium originated from Papua New Guinea and Queensland-Australia was established in Wonogiri, Central Java on December 1993. The tree selection within family  were carried out base on growth characteristic, whereas the wood property traits were not included. The objective of this research is  to find the effect of provenance or family in variation of diameter and  wood properties  of`A. mangium in the trial in 5 years old. The results showed that mean of wood specific gravity was 0.44 (it was medium catagory)  and mean of fiber length was 1.04 mm (it is short fiber category).  Variation of heartwood area, wood specific gravity, and moisture content showed significantly differences among provenance or between family within provenance.  Individual heritability of diameter and heartwood area were low (h2i=0.03 for diameter and  h2i=0.05 for heartwood area), however individual heritability of wood properties were low to high (hi2=0.10-0.56). The result of investigation indicated that trees selection using wood properties  should be conducted to improve wood quality in the progeny trial.  
Co-Authors Annisa Primaningtyas Eko Bhakti Hardiyanto Mohammad Naiem Mudji Susanto Muhammad Navis Rofii Prasetyo Prasetyo Ragil Widyorini Tomy Listyanto Yustinus Suranto