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All Journal Agroland : Jurnal Ilmu-Ilmu Pertanian Jurnal Hutan Tropika Jurnal Penelitian Hasil Hutan
T.A. Prayitno
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Decision Sciences, Operations Research & Management Materials Science & Nanotechnology

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DISTRIBUTION OF CERTIFIED WOOD TEAK WOOD MACHINING PROPERTIES AS EXPORT FURNITURE MATERIALS: Sebaran Sifat Pemesinan Kayu Jati Hutan Rakyat Bersertifikasi Sebagai Bahan Mebel Ekspor Sushardi; T.A. Prayitno; Y. Suranto; Ganis Lukmandaru
HUTAN TROPIKA Vol 16 No 1 (2021): Volume 16 Nomor 1 Tahun 2021
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jht.v16i1.2963

Abstract

Pengujian sifat pemesinan kayu jati hutan rakyat menjadi sangat penting untukmendapatkan informasi penggunaannya sebagai bahan baku mebel kualitas ekspor.Penelitian bertujuan mengetahui pengaruh perbedaan lokasi dan umur tanaman terhadapsifat pemesinan kayu jati hutan rakyat. Penelitian dilaksanakan di hutan rakyat jatitersertifikasi pada umur 6, 8 dan 10 tahun. Pengujian sifat pemesinan dilakukan menurutmetode ASTM D1666-87. Penelitian menggunakan analisis varian program SPSS 20.0dengan uji lanjut Tukey. Hasil penelitian menunjukan jati hutan rakyat di lokasi Nglipar,Playen dan Dlingo dan umur pohon 6, 8 dan 10 tahun menghasilkan sifat pemesinan yangberbeda sangat nyata, dengan kualitas kelas mutu I dan sifat pemesinan sangat baik,kecuali di lokasi Dlingo dan umur 6 tahun dengan kelas mutu II dan sifat pemesinan baik.Sifat pemesinan jati hutan rakyat mempunyai nilai bebas cacat penyerutan 79.86 – 87.97%, pembentukan 80.96 - 90.06 %, pemboran 80.34 -89.85 % dan pengampelasan 80.19-94.47 %.Kata kunci : Hutan jati rakyat, pemesinan, penyerutan, pembentukan, pemboran,pengampelasan
SEBARAN, POTENSI DAN KUALITAS KAYU EBONI (Diospyros celebica Bakh.) DI SULAWESI Muhammad Asdar; T.A. Prayitno; Ganis Lukmandaru; Eny Faridah
Agroland: Jurnal Ilmu-ilmu Pertanian Vol 22, No 2 (2015)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (847.542 KB)

Abstract

Ebony (Diospyros celebica Bakh.) isan endemic species of Sulawesi. The heartwood of ebony is composed of a series of axial and alternating black and paler streaks. Thisstreak pattern determinesof wood quality. Excessive exploitation causes ebony become scarce and has been classified as vulnerable by IUCN and Appendix II by UNEP - WCMC. Currentdistribution, potency (standing stock) and wood quality of each natural habitat of ebony in Sulawesi are not yet known. This study aims to determine the distribution, potency and wood quality on its natural habitat in Sulawesi. Standing stock data obtained with inventory and the results of the previous inventory.  GPS coordinates of each habitat is taken to make a map. Streaks quality class based on ebony factory standard in Palu and Makassar. The results showed that habitat of ebony was naturally found in Districts of Gowa, Maros, Pangkep, Barru, Sidenreng Rappang, Luwu, Luwu Timur (South Sulawesi Province), Mamuju (West Sulawesi Province), Donggala, Parigi Moutong, Poso and Morowali (Central Sulawesi Province).  The highest standing stock was found at Cenrana, Maros which is about 95,05 m3ha-1.  Most of the remaining ebony habitat were found in the protected areas. Wood quality class A and B were found in Sausu and Poso while other areas classified as class C. Key Words:  Ebony Wood,  Endemic Species Of Sulawesi, Strike Quality 
PENGARUH PENAMBAHAN SERAT KAYU PINUS DAN BAMBU PETUNG TERHADAP KUALITAS PAPAN SERAT KERAPATAN SEDANG KAYU MAHANG DENGAN PEREKAT ASAM MALAT Agus Wahyudi; T.A. Prayitno; Ragil Widyorini; J.P. Gentur Sutapa
Jurnal Penelitian Hasil Hutan Vol. 37 No. 2 (2019): Jurnal Penelitian Hasil Hutan
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2019.37.2.81-92

Abstract

Properties and quality of fibreboard products are much influenced by quality of the fiber materials, pressing process, and the amount and type of the used adhesive. The use of malic acid adhesives in the manufacture of medium density fibreboards (MDF) from mahang wood has low mechanical properties, especially modulus of static value. This paper studies on the effect of adding long fibers of pine wood and petung bamboo to improve the properties of MDF mahang wood with malic acid adhesives. The compositions ratio of mahang wood, pine wood, and petung bamboo fiber are 100/0/0, 90/10/0, 80/20/0, 90/0/10, 80/0/20, and 80/10/0, malic acid content of 25 wt % based on dry weight fibers and hot pressing at 180ºC for 10 minutes. Physical and mechanical tests were accomplished according to JIS 5905-2003 testing standard. Result shows the addition of long fibers of pine wood and petung bamboo increased the mechanical value of MDF from mahang wood. The best mixture of fiber is 90% mahang wood fiber and 10% petung bamboo, with value internal bonding 0.7 MPa, modulus of rupture 9.11 Mpa, and modulus of elasticity 2.5 GPa.
PENGARUH UMUR POHON TERHADAP SIFAT DASAR DAN KUALITAS PENGERINGAN KAYU WARU GUNUNG (Hibiscus macrophyllus Roxb.) Efrida Basri; T.A. Prayitno; Gustan Pari
Jurnal Penelitian Hasil Hutan Vol. 30 No. 4 (2012): Jurnal Penelitian Hasil Hutan
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2012.30.4.243-253

Abstract

This study examines wood properties as the indicator of waru gunung wood quality based on age and axialdirectionand their implication on drying quality. Wood samples used in this study collected from three ages, i.e. 8, 12, and16years.Thesamples were arranged in axial direction of the tree stem,namely, bottom, middle, and top portions. The basicproperties of the wood observed i.e. fiber length, specific gravity (SG), and wood shrinkages for each axial portions wereobserved in radial direction from near pith, central and near bark. Fiber length measurements were undergoneusingprocedure practiced at the Centerfor Research and Development on Forestry Engineering and Forest ProductsProcessingBogor. Specific gravity and shrinkage were determined in accordance with the modified ASTM D143-94, meanwhiledrying properties and qualitieswere observed using the modified Terazawa method.Results revealed that thefiber length and SG of waru gunung were affected by tree ages, andposition of the tree stemin both axialand radial directions. Considering basic propertiesand dryingqualities of the series wood aging, itturned out that wood with tree age of 16 years could comply with the requirementsforfurniture material.
Co-Authors Agus Wahyudi Efrida Basri ENY FARIDAH Ganis Lukmandaru Gustan Pari J.P. Gentur Sutapa Muhammad Asdar Ragil Widyorini Sushardi Y. Suranto