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Peronema Forestry Science Journal
Published by Universitas Sumatera Utara
ISSN : -     EISSN : -     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
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Articles 304 Documents
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Kualitas Laminasi Bambu Betung (Dendrocalamus asper) pada Berbagai Perlakuan Ukuran Sortimen dan Buku Bambu Putri Rafika Wulandari; Luthfi Hakim; Tito Sucipto
Peronema Forestry Science Journal Vol 4, No 4 (2015): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

Laminated boards made from bamboo betung (Dendrocalamus asper) with the influence of different sizes and the presence of node sortimen. The purpose of this study was to evaluate the physical and mechanical properties of laminated bamboo betung, evaluating the effect of nodes and size sortimen the physical and mechanical properties of laminated bamboo board betung and determine the best size and the existence of the book sortimen bamboo as laminate raw material. Testing the water content, water absorption, delamination and bending strength is based JAS standard SE-7 2003 on Flooring surfaces while bonding strength testing is done based on ISO standard ISO 16981-2012.  The results show the quality of bamboo betung laminate board meets the standards JAS-7-2003 SE for testing moisture content, delamination, but for testing water absorption does not fulfilling. On the mechanical properties of bamboo betung laminated board meets the standards JAS-7-2003 SE for testing bending strength and meets ISO 16981-2012 standards for surface bonding strength testing. The best treatment for laminated boards are laminated boards without involving nodes with a size of 20 cm sortimen.Keyword : Dendrocalamus asper, node, sortimen size, laminated board
UJI ANTIOKSIDAN DAUN MUDA DAN DAUN TUA GAHARU (Aquilaria malaccensis Lamk) BERDASARKAN PERBEDAAN TEMPAT TUMBUH POHON Rizki khadijah Harahap; Ridwanti Batubara; Surjanto Surjanto
Peronema Forestry Science Journal Vol 4, No 4 (2015): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

The leaf of aloe has an antioxidant activity which can reduce free radicals. The research of aloe toward chemical compund of fresh and rotten leaf, and its antioxidant activities. Ethanol extract the leaf o aloe by using maceration method, concentrated by rotary evaporator and evaporated by waterbath. The test of antioxidant activity use DPPH method 1,1- diphenil-2-picrylhydrazil (DPPH), and an observed parameter is the percentage of free- radical-reduction in 30th minute with different concentrations (40ppm, 60ppm, 80ppm, 100ppm ) and value of IC50  ( Inhubitory concentrations) is analyzed by using regressions equation. The of EESDG show the percentage of muffled- fresh-research leaf from arboretum of usu (Univercity of north sumatera) is higher as the entianceluent of concentration sample ;92,10% ; 92,10%; 93,80%; 93,80%; and the lowest percentage down to 22,26%; 25,31%; 27,94%; 35,72%. And result of antioxidant activity by using light of spectrophotometer is catched on the wave of 516 nm, and get the result that (EESDG) fresh and rotten leaf from Langkat has IC50 of 39,70 ppm and 40,03ppm. While fresh and rotten leaf from Arboretum of USU has IC50 of 28,50 and 43,20 ppm. The research result that the estracts of ethanol and simplisia aloe have a very strong antioxidant activity.Keywords:. gaharu leaf,ethanol extract, antioxidant activity
Kualitas Papan Partikel Batang Pisang Barangan Berdasarkan Variasi Kadar Perekat Phenol Formaldehida Johanna Christina Malau; Tito Sucipto; Apri Heri Iswanto
Peronema Forestry Science Journal Vol 5, No 1 (2016): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

Banana stem is one of alternative materials for particleboard manufacturing. Utilization of banana stems for particleboard can reduce the wood demand for industrial particleboard. The objective of this research was to evaluate the effect of resin level PF to physical and mechanical properties particleboard made from banana stems and to determine of the optimum resin level from particleboard. Varied concentration of PF resin as binder consist of  8%, 10%, 12%, 14%, and 16%. Size thickness and density target of particleboard were 25 x 25 cm2 x 1 cm and 0,70 gr/cm3 respectively. The result showed that, over all for physical properties density and moisture content had fulfill JIS A 5908 (2003). Banana stem particleboards had low dimensional stability. Trend of water absorption and thickness swelling showed that the increasing of resin level resulted of decreasing water absorption and thickness swelling parameter. For mechanical properties, MOE and IB for resin level 16% had fulfill standard. In generally, the high resin level caused improvement mechanical properties of particleboard.Keywords: banana stems, phenol formaldehyde, mechanical and physical properties, particleboard
Analisis Kualitas Pohon di 5 Jalur Hijau Kota Pematangsiantar Annie N Hutagalung; Delvian Delvian; Deni Elfiati
Peronema Forestry Science Journal Vol 5, No 1 (2016): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

This study aims to determine the tree species and tree quality found on five green belt in Pematangsiantar. This study was carried out along the Medan road, Sisingamangaraja road, Rakutta sembiring road, Ahmad yani road and D. I Panjaitan road. This research used census and scoring methods. Assessment conducted of tree health involved trunk health and crown health,and then the technical of trees involved threat to buildings, threats to roads, sidewalks and drainage, and threats to electric and telephone wires. Results showed that tree species found in five green belt as much as nine trees. The trees most often found are mahogany (Swietenia mahogani). The quality of trees in five green belt when viewed from the tree health included in light category, and from technical trees included in moderate category. The most good quality tree located on Ahmad yani street, while the most low quality trees are on the Rakutta sembiring street. This is indicated from the cumulative value ≥2,5 on Rakutta sembiring road has the highest percentage that is 14,93 %.Keywords : Green belt, Tree species, Tree quality
STRUKTUR VEGETASI DAN CADANGAN KARBON TEGAKAN DI KAWASAN HUTAN CAGAR ALAM LEMBAH HARAU KABUPATEN LIMA PULUH KOTA SUMATERA BARAT Muhammad Iko Pratama; Delvian Delvian; Kansih Sri Hartini
Peronema Forestry Science Journal Vol 5, No 1 (2016): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

composition of plant species and the amount of carbon stocks stored in Nature Reserve Forest Lembah Harau at tree level and the level of the pole. The sampling intensity is 5 % of the total area of 270.5 ha. So that the total area of observation is 13.525 ha with a plot measuring 20 m x 100 m were 68 plots. In each plot were made sub-sub plot measuring 20 m x 20 m for tree and 10 m x 10 m for pole. Vegetation analysis use a combination of track method and swath line method, while the biomass estimation use non destructive sampling method. The results showed that 80 kinds of plants with a number of individuals as much as 246 individuals/ha. The highest important value indeks of tree species is Rhodelia teysmani with the value 53.33 %, while in the pole species is Nephelium mutabile with the value 46.30 %. The amount of carbon stocks stored in trees and poles are 62.57 ton/ha.Keywords : vegetation , carbon stock , nature reserve lembah harau
JENIS, HARGA KAYU KOMERSIL DAN ANALISIS EKONOMI PADA INDUSTRI KAYU SEKUNDER (PANGLONG) DI KABUPATEN KARO ( Bhima mahawira; Tito Sucipto; Rudi Hartono
Peronema Forestry Science Journal Vol 5, No 1 (2016): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

This research aimed to determine the type and price of commercial timber traded in Karo district. This research investigated the secondary wood industry usually called “panglong” as an object as well as the source of information. This research was conducted by the observation to secondary wood industry in 17 districts of Karo. Data  include the type, size, and price of wood, then data was tabulated. Then, the economic analysis for secondary industry wood was performed. The analysis results of 17 from  industry  surveyed in Karo district showed that the type of wood being traded were dominated by any kind of hard wood with percentage of 100%, pine (Pinus merkusii) of 88.23%, any hard woods of 76.47%, and meranti (Shorea sp) and dammar (Shorea macroptera) of 23.52%. Pine has the cheapest price among the commercial timber species that are traded others. Traded timber prices ranging from Rp. 10000 to Rp 11000 per inch. The greater secondary wood sawmill is UD. Surbakti with 25 employees and the BEP value of door frame production are Rp. 572625/ product, window sills Rp. 574875/product, while the smallest is UD. Mual Nauli with 2 employees and BEP value of window sills are Rp 250000 / product and ventilation Rp 62500 / product.Keywords: Secondary Wood Industry, Panglong, Economic Analysis.
KERAGAMAN GENETIK TIGA POPULASI KELAPA SAWIT (Elaeis guineensis Jacq.) TIPE PISIFERA BERDASARKAN MARKA RAPD Heru Prayogi; Mohammad Basyuni; Lollie AP Putri
Peronema Forestry Science Journal Vol 4, No 2 (2015): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

Palm oil producing oil is one of the famous of oil palm plantations as a source of producer non- petroleum oil for Indonesian foreign exchange. Superior varieties of palm oil produced by various research institutions that is tenera originated crossly from dura x pisifera (DxP). Pisifera has an important function in the production of seed of oil palm. Pisifera population is very important to be managed and developed . A RAPD is a method to identify a number of large polymorphism DNA in the genome quickly, efficiently and suitable for the study of genetic diversity. The purpose of this research is to analyze genetic diversity on pisifera type of palm oil by three population namely Yangambi origin, LaMe origin and LaMe silang lanjut in  Bangun Bandar seed productions PT Socfin Indonesia analyzed by RAPD markers. Eighteen  sample for each pisifera population of Yangambi origin, LaMe origin and LaMe silang lanjut showed moderate level of genetic diversity which is shown the average value of 0.24 with the highest was 0,28 and the lowest value was 0.21. The percentage of highest polymorphic on the primer 15 and primer 19 of LaMe origin which reached 100%. The Polymorphic information content (PIC) highest on the primer 11 was on Yangambi origin and primer 10 was laMe silang lanjut of 0.49, while to the lowest PIC on primer 21 of LaMe origin was 0.01.Key words: Palm oil, Elaeis guineensis Jacq., RAPD, genetic diversity
RESPONS PERTUMBUHAN TANAMAN DAN KONSENTRASI RANTAI PANJANG POLYISOPRENOID TERHADAP VARIASI NAUNGAN DAN SALINITAS PADA MANGROVE Sonneratia alba Smith. Evan Kharogi Sinulingga; Mohammad Basyuni; Yunasfi Yunasfi
Peronema Forestry Science Journal Vol 4, No 3 (2015): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

Mangroves has a special ability to adapt with extreme environmental conditions. This condition allows mangroves to produce secondary metabolites as chemical defenses for their sustainability. Polyisoprenoid is one of the secondary metabolites which unknown function. The purpose of this study is to analyze the growth of S. alba seedling in responsse to shade variations and salinity concentration and its influence on the concentration of long-chain polyisoprenoid. The research was conducted from August to December 2014 using Factorial Completely Randomized design with shade treatment of 0%, 25%, 50%, and 75% along with salinity levels of 0%, 1.5% and 3%. Analysis of non-saponifiable lipid content and polyisoprenoid was done by comparing the leaves and roots of S. alba seedlings in variation 0% shade and 3% with salinity variations and in 75% shade with 3% salinity. The results showed that growth of S. alba seedling was optimum variation of 0% shade and 3% salinity showing 100% growth, 2.6 cm height, 0.17 mm diameter, 0.113 g fresh weight root, 0, 08 g dry weight root, 0.15 g wet weight shoot, 0.05 g dry weight shoot, 4 leaves number and ratio shoot and roots was 0.59. Polyisoprenoid content obtained at 190,5 ml in leaves an 133,4 ml in roots from variation 0% shade and with 3% salinity but in 75% shade with 3% salinity at 185,2 ml in leaves and 231,9 ml in  roots. Polyisoprenoid may play an important role in adapting the availability light intensity, which polyisoprenoid concentration increased with reducing light intensity on S. alba seedlings.Keywords : Mangroves, S. alba, shade, salinity, polyisoprenoid
Kualitas Papan Partikel dari Limbah Batang Kelapa Sawit dan Mahoni pada Variasi Kadar Perekat Phenol Formaldehida Shanty Sianturi; Rudi Hartono; Tito Sucipto
Peronema Forestry Science Journal Vol 4, No 4 (2015): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

The combination of oil palm trunk waste and mahogany’s can increase the quality of particle board. The purpose of these study were to evaluated the effect of variations of phenol formaldehyde adhesive content and to determine the most valuable adhesives content towards the quality of particle board made from waste of oil palm trunk and mahogany’s. The treatment variation were variations of PF adhesives content  were 8%, 10%, 12%, 14%, and 16%. Particle board made with size 25 cm x 25 cm x 1 cm with target density of 0,7 gr/cm3, pressure in 30 kg/cm2, and temperature in 170°C in 10 minutes. The experimental result were compared with SNI 03-2105-2006. The statistical analysis used a single completely random experimental with 3 replication. The result showed that density value was 0.49-0.56 g/mc3, moisture content was 3.52-4.25%, water absorption in immersion for 2 hours was 67.35-117.33%, and 24 hours was 75.74-132.22%, thickness swelling on immersion for 2 hours was 8.61-33.79%, and 24 hours was 10.91-35.37%, IB values was 0.44-1.36 kg/cm2, MOE values was 7090-15529 kg/cm2, and MOR values was 75.17-169.82 kg/cm2. Variations of PF adhesive give the effect of physical and mechanical properties significantly except moisture content. The physical properties in this experiment were density, moisture content, thickness swelling on immersion for 2 hours with adhesives content were 14% and 16%, also for 24 hours with adhesive content was 16%, had been fulfilling the standard. All of IB and MOE value didn’t fulfill the standard, but the value of MOR only  in 8% adhesive content didn’t fulfill the standard. The best treatment was PF adhesive content 14%.Keywords:       oil palm trunk waste, mahogany’s, phenol formaldehyde, physical and mechanical properties, particle board.
PENGARUH INOKULASI MIKORIZA ARBUSKULA TERHADAP PERTUMBUHAN BIBIT TANAMAN SLOW GROWING (GLODOKAN DAN TANJUNG Reza Dimas Putra; Delvian Delvian; Deni Elfiati
Peronema Forestry Science Journal Vol 5, No 1 (2016): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

This research aims to find out the response or effect of arbuscular mycorrhizal inoculation on growth of slow growing plant. This research was conducted in the greenhouse of the Faculty of Agriculture, University of North Sumatra, Medan.This research uses completely randomized factorial design with 2 factors namely mycorrhizal doses (0 g / seed, 5 g / seed, 10 g / seed, and 15 g / seeds) and plant species (glodokan and tanjung). Parameters measured were plant height, plant diameter, leaf number, percentage of root colonization, P uptake, total dry weight, and short root ratio. The results showed the interaction between plant species and dose mycorrhizal not significantly affected all parameters of eachs treatment. Conversely single factor plant species showed significant effect on all parameters of each treatment, but to a single factor dose of mycorrhizal significant effect on the total dry weight and P uptake but no significant effect on the parameters of height, diameter, number of leaves, the ratio of the root crown and root colonization. Different types of plants  will give a different response to growth.Keywords: Mycorrhizal Fungi, Tanjung, Glodokan, Marginal Land

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