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All Journal BIOTROPIA - The Southeast Asian Journal of Tropical Biology Jurnal Ilmu dan Teknologi Kayu Tropis

Iskandar Z Siregar

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Author-ID : 3156894

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology Veterinary

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Articles

INTRASPECIFIC VARIATION ON EARLY GROWTH OF Neolamarckia cadamba MIQ. IN PROVENANCE-PROGENY TESTS IN WEST JAVA PROVINCE, INDONESIA Dede J Sudrajat; Nurhasybi Nurhasybi; Iskandar Z Siregar; Ulfah J Siregar; Irdika Mansur; Nurul Khumaida
BIOTROPIA - The Southeast Asian Journal of Tropical Biology Vol. 23 No. 1 (2016)
Publisher : SEAMEO BIOTROP

Genetic parameters on early growth of Neolamarckia cadamba, an indigenous species with potential as a source of wood timber, were estimated in open-pollinated provenance-progeny tests at two sites in West Java Province, Indonesia. The experiment was conducted using randomized complete block design with 12 provenances, 105 families and 5 replications of 4-tree row plots. Total height and root collar diameter were measured at the age of 18 months growth. Significant differences among the provenances and families within provenances were observed for height and collar diameter at all sites, except for the collar diameter of among provenances at Parungpanjang site. In general, Garut (GSJ) provenance performed better growth at the two sites than Kualakencana (KKP) and Nusa Kambangan (NKJ) provenances. The evaluation of component of variance at the two sites showed that the provenance effects (ranging from 0.5 to 1.7%) contributed more to total variance than family within provenance effects(ranging from 0.4 to 0.6%). Genetic correlations between height and collar diameter were weak to moderate. Heritability was low for all traits at Limbangan, while at Parungpanjang, the heritability was moderate. Estimation of genetic gain for height and diameter by proportional selected family 0.30 was 0.13 and 0.18 for Limbangan and 0.31 and 0.16 for Parungpanjang. Heritability measurement should be sustained to reach stable value. Stable heritability combined with selection of family and selection within family will improve genetic gain.Keywords: Genetic correlation, genetic parameter, heritability, Neolamarckia cadamba, progeny, provenance, selection

Sifat Kimia dan Dimensi Serat Kayu Mangium (Acacia mangium Willd.) dari Tiga Provenans. Chemical Properties and Fiber Dimension of Acacia mangium Willd. from Three Provenances Wasrin Syafii; Iskandar Z Siregar
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 4, No 1 (2006): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

The objectives of this research are to evaluate the chemical components and the fiber dimension of Acacia mangium Willd from three provenances. The wood samples used in this study are grown in Parungpanjang, Bogor originated from three provenances namely Queensland (QLD), Papua New Guinea (PNG), and East Indonesia (EI). The chemical components measured in this study are cellulose, hemicelluloses, lignin, and extractives, while fiber dimensions and its derivatives determined are Runkle Ratio, Felting Power, Muhlsteph Ratio, Flexibility Ratio, and Coefficient of Rigidity. This research indicated that among three provenances investigated, the Queensland provenance is better than two others as sources of raw material for pulp and paper due to the highest cellulose content and lowest lignin and extractives contents. Likewise, from fiber dimension aspect, Queensland provenance also showed better properties than that of PNG and EI

Resin Duct Anatomical Structure of High Resin Yielder Pinus merkusii Arida Susilowati; Imam Wahyudi; Supriyanto Supriyanto; Iskandar Z Siregar; Corryanti Corryanti; Apri H Iswanto
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 11, No 2 (2013): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

The objective of this research was to characterize resin duct anatomical structure of high resin yielder pine (Pinus merkusii) that influences resin production. Samples were collected from high resin yielder pine with different resin production class from seedling seed orchard Cijambu, Sumedang and normal trees from Bogor. Samples than evaluated through microscopic and macroscopic observation to get information about some parameter related to resin duct. The result on anatomical structure characterization showed that high resin yielder trees compared to that of normal one are as followed: darker in wood colour (reddish brown compared to creamy white), higher in number of axial resin duct (9.401.68 mm-2 to 101.30 mm-2 compared to 40.96 mm-2), wider in resin duct diameter (468.8998.72 μm to 562.11181.62 μm compared to 109.4211.26 μm), thicker in epithelium cell (50.81 12.20 μm to 58.599.55 μm compared to 23.1787 μm). These differences may affect to quantity of resin yielder compared to normal producer.Key words: anatomical structure, epithelium, high resin yielder, Pinus merkusii, resin duct

Aplikasi Isotop δ13C dan δ18O untuk Lacak Balak Kayu Jati (Tectona grandis Linn.f.) di Jawa Application of Isotopes δ13C and δ18O for Teak Wood (Tectona grandis Linn.f.) Timber Tracking in Java Agus Kholik; Djiono Djiono; Iskandar Z Siregar; Ulfah J Siregar; Lina Karlinasari; Tedi Yunanto
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 7, No 1 (2009): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Tracking the origin of Teak timber and its wood product is possible to be carried out using stable isotopes fingerprinting. To enrich the available variation patterns, Teak woods samples were collected from nine Forest Management Units (FMUs) representing all provinces and Teak centres in Java. Mills from all part of woods were mixed for analyses. The mills were burned under vacuum in a reactor system at 1200oC for 2 h, the resulting clean CO2 was transferred to the mass spectrometer to determine its isotopic composition of δ13C and δ18O. The generated data was then analysed using multivariate analysis. The results showed that isotopes analysis grouped Teak populations in Java intoWest Java population and mixed Central-East Java population. To consider wood as material for fingerprinting traded forest product, a refinement on method should be done.

Wood Quality of Clones Teak with Different Planting Distance Andi D Yunianti; Imam Wahyudi; Iskandar Z Siregar; Gustan Pari
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 9, No 1 (2011): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Many researchs have been done focusing on the wood quality of teak (Tectona grandis L.f.) especially at the various age level and different locations. This research analyzed different planting distance : (3 x 3) m2 and (2 x 6) m2 from 2 clones; Cepu and Madiun cloned. Oven-dried density, fiber dimension, microfibril angle and modulus of elasticity were determined to asses the wood quality. The results showed that the wood quality of teak from spacing (3 x 3) m2 were better than (2 x 6) m2, although diameter and growth rate were higher in spacing (2 x 6) m2. However, there were not diffrences of wood quality for both clones.Key words : Cepu clone, Madiun clone, planting distance, Tectona grandis, wood quality.

Keragaman Genetik Pertumbuhan dan Hubungannya dengan Penetrasi Pilodyn pada Uji Provenansi-Keturunan Jabon (Neolamarkcia cadamba (Roxb) Bosser) di Parung Panjang, Bogor) (Genetic Variation of Growth and Its Relationship with Pilodyn Penetration on Provenance-Progeny Trial of Jabon (Neolamarkcia cadamba (Roxb) Bosser) at Parung Panjang, Bogor) Nelly Anna; Iskandar Z Siregar; Supriyanto Supriyanto; Lina Karlinasari; Dede J Sudrajat
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 16, No 2 (2018): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Jabon (Neolamarkcia cadamba (Roxb) Bosser) is a fast growing and preferred species as material for various wood industries. However, the growth and quality information of its wood is still limited. This study aims to assess the characteristics of growth, physical properties of wood, genetic parameters of growth and physical properties of wood, and its relationship with pilodyn penetration on provenance-progeny trial of jabon in Parung Panjang, Bogor. Measurement of growth characteristics was performed on height and diameter at breadst height (DBH), whereas the physical properties of wood (density, specific gravity, and moisture content) were performed using core samples (destructive methods) and density estimation with pilodyn (nondestructive method). Statistical analysis explains that there are significant differences between provenances in height, diameter, pilodyn penetration, density, and specific gravity, except for moisture content. The mean of plant survival percentage of 36 months old jabon was 52.8%. The relationship between growth character and the physical properties of wood with pilodyn penetration is negative and weak, except in moisture content, positive but weak. The estimation of individual heritability value ranges from 0.011 to 0.183, while heritability of the family ranges from 0.017 to 0.308.

Co-Authors Agus Kholik Andi D Yunianti Apri H Iswanto Arida Susilowati Corryanti Corryanti Dede J Sudrajat Dede J Sudrajat Djiono Djiono Gustan Pari Imam Wahyudi Indrawan, Imam Wahyudi Irdika Mansur Lina Karlinasari Nelly Anna Nurhasybi Nurhasybi Nurul Khumaida Supriyanto Supriyanto Tedi Yunanto Ulfah Juniarti Siregar Wasrin Syafii dan Kurnia Sofyan Gustan Pari Buchari

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