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Harry Praptoyo
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Agriculture, Biological Sciences & Forestry

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Studi Perbandingan Metode Sampling Bor Riap dengan Disk untuk Pengukuran Proporsi dan Dimensi Serat Kayu Sengon Salomon (Paraserianthes falcataria, (L.) Nielsen) Comparative Study of Two Types Sampling Method for Measuring Cell Proportion and Fiber Dimension on Sengon Salomon Wood (Paraserianthes falcataria (L.) Nielsen) Harry Praptoyo
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 3, No 2 (2005): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (370.588 KB) | DOI: 10.51850/jitkt.v3i2.290

Abstract

The objective of this research was to determine the differentiation on the measurement result of cell proportion and fiber dimension that caused by the different of sampling methods. The research was conducted at the Laboratory of Wood Structure and Properties, Faculty of Forestry, Gadjah Mada University.The research designed with completely random design composed by factorial experiment, which considered two factors, namely: 1) Sampling methods: disk method and drill method, and 2) Radial distribution: center/pitch, center-bark and near bark. Analysis of variance was conducted in order to evaluate the variation in all data of two factors mentioned above. The relationship between sampling method and radial distribution was also evaluated. The data variables were: fiber length, cell diameter, lumen diameter, cell wall thickness, and the proportion of vessel, rays, fiber and parenchyma. The observation on fiber length was conducted by using light microscope or scanning electron microscope. The observation on cell proportion was conducted by using photomicroscope and dot grid.The results of the research showed that the different of sampling methods have not any influenced to the measurement result of cell proportion and fiber dimension on Sengon wood. Whereas the radial distribution of wood has significant influenced in fiber dimension, especially in fiber length and cell wall thickness, but in cell proportion, radial distribution has not influenced.
Physical and Mechanical Properties of 10-Year Old Superior and Conventional Teak Planted in Randublatung Central Java Indonesia Fanny Hidayati; Joko Sulistyo; Ganis Lukmandaru; Tomy Listyanto; Harry Praptoyo; Rini Pujiarti
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 13, No 1 (2015): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (241.155 KB) | DOI: 10.51850/jitkt.v13i1.55

Abstract

Tree breeding program has been conducted in Indonesia in order to produce more productive teak trees. Recently, from this program, superior clones (clone source) of teak have been selected for the establishment of the wider plantations. These clones show a good performance on growth characteristics such as stem diameter and tree height. However, it is important to evaluate wood quality of selected superior teak. Physical (heartwood percentage, wood color, basic density, and shrinkage per 1% change in moisture content) and mechanical (static bending strength and compressive strength) properties were investigated for 10-year old of two sources type of teak (superior and conventional) planted in Randublatung, Central Java, Indonesia. There was not significant different between superior and conventional teak was found in all physical and mechanical properties of both teak wood, suggesting that wood properties of both teak are similar at the same age. All trees are in juvenile phase as show by increasing of basic density from pith to bark. Basic density has positively correlation with all mechanical properties measured. It can be said that basic density can be used to estimate mechanical properties.Keywords: conventional teak, mechanical properties, physical properties, superior teak
Co-Authors Fanny Hidayati Ganis Lukmandaru Joko Sulistyo Rini Pujiarti Tomy Listyanto