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The objective of this research was to analyze the physical and mechanical properties of palm oil trunk. The result showed that in term of the vertical direction the lower part of stem had better physical (density, moisture content and shrinkage) and mechanical (modulus of elasticity, modulus of rupture, hardness, compressive and tensile strength parallel to grain) properties compared with medium and upper end part. In the horizontal direction the edge part of trunk had better physical and mech Apri Heri ISWANTO; Tito SUCIPTO; Irawati AZHAR; Zahrial COTO; Fauzi FEBRIANTO
Jurnal Ilmu dan Teknologi Hasil Hutan Vol. 3 No. 1 (2010): Jurnal Ilmu Teknologi Hasil Hutan
Publisher : Departemen Hasil Hutan, IPB

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The objective of this research was to analyze the physical and mechanical properties of palm oil trunk. The result showed that in term of the vertical direction the lower part of stem had better physical (density, moisture content and shrinkage) and mechanical (modulus of elasticity, modulus of rupture, hardness, compressive and tensile strength parallel to grain) properties compared with medium and upper end part. In the horizontal direction the edge part of trunk had better physical and mechanical properties than medium and center part. Keywords : horizontal direction, palm oil stem, physical pro-perties, mechanical properties, vertical direction

ANALISIS PEMASARAN PRODUK ROTAN OLAHAN DI KOTA BINJAI Pardamean Tampubolon; Irawati Azhar; Tito Sucipto
Peronema Forestry Science Journal Vol 4, No 1 (2015): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Utilization of non timber forest products, especially rattan gives a positive impact on industrial development in Indonesia. This study aims to determine the type and price of raw materials of rattan and rattan products processed were traded, and analyze the marketing flow of rattan product processed in Binjai of raw materials derived from Langkat. Data retrieved through interviews with intermediaries rattan craftsmen and traders, and tabulated, then calculated using the formula of marketing margins and profit margins are then analyzed. Rattan species that dominate in the industry, namely sega (Calamus caesius Blume) and getah (Daemonorops angustifolia Mart) and the type of rattan genera Calamus and Daemonorops be priced between Rp.3.000-Rp.20.000 per stem or per kg. Processed rattan products are tables, chairs, baskets, hood serving, place parcel rattan, wicker mirror with a selling price of between Rp.8.000-Rp.400.000 per unit. Based on the R/C ratio of the products in the rattan industry Aslinda, production of wicker basket viable and economically beneficial to the R/C ratio > 1 of 100 units of the product. There are three (3) types of marketing flow in Binjai, that is 1). The craftsmen is directly to consumer, 2). The craftsmen to store/retailers who will resell it to consumers and 3). The craftsmen and also seller to the consumer.Keywords : rattan, rattan products, marketing analysis, R/C ratio

Pengaruh Perlakuan Pengarangan dan Penambahan Partikel Kemiri Terhadap Kualitas Paving Block ( Frederick Raymond; Tito Sucipto; Irawati Azhar
Peronema Forestry Science Journal Vol 4, No 2 (2015): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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This experiment aims to determine the quality paving block with the addition of kemiri particles with carbonization treatment, evaluate the effect of adding particles and carbonization treatment and determine the number of particles and optimal treatment. Variations of these purpose was the particle composition (5%, 7%, 9%) and carbonization treatment. Characteristics of the paving block with treatments based on SNI 03-0691-1996 particle composition and carbonization treatment is from 24,21 to 62,53 MPa compressive strength (quality A-B), water absorption 1,89% - 2,79% (quality A), resistance to sodium sulfate 1,72% -2,82% (defects) and porosity of 1,31% - 5,67%. The treatment takes significant effect on the compressive strength, resistance to sodium sulfate and porosity but did not significantly affect the water absorption. Based on the results of analysis of variance, optimal treatment is the particle composition 7% with treatment without carbonization.Keywords: paving blocks, kemiri shell, carbonization, particle composition, quality.

Pengaruh Kadar Perekat Urea Formaldehida Terhadap Kualitas Papan Partikel dari Kayu Gamal (Gliricidia sepium Jonyal Periandi Sitanggang; Tito Sucipto; Irawati Azhar
Peronema Forestry Science Journal Vol 4, No 2 (2015): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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The stalk of the gamal wood is one of potential raw material for manufacturing particleboard. The purpose of this study was to evaluate the effect of urea formaldehyde adhesives content on physical and mechanichal properties of the particleboard and to determine the optimum urea formaldehyde adhesives content for the gamal particleboard. Particleboard were made with size 25 cm x 25 cm x 1 cm with density of 0,8 g/cm3. The particleboard be pressed by 1200C temperature during 8 minute with pressure 25 kg/cm2. Result showed the treatment of adhesive content have significant influence on moisture content, water absorption, thickness swelling, modulus of rupture (MOR) and internal bond (IB) gamal particleboard. The optimum treatment of urea formaldehyde adhesive content is 11%.Key words: Gliricidia sepium, particleboard, adhesive content, quality

POTENSI PEMANFAATAN GAMBIR (Uncaria gambir Roxb) DI KECAMATAN PERGETTENG GETTENG SENGKUT, KABUPATEN PAKPAK BHARAT, PROVINSI SUMATERA UTARA Jeckson Fransiskus Sagala; Rudi Hartono; Irawati Azhar
Peronema Forestry Science Journal Vol 4, No 3 (2015): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Gambir (Uncaria gambir Roxb) is a kind of dried sap which is produced from leaves and twig of plant extract. Gambir is used traditionally for various purposes such as mixture of betel nut, drugs, adhesives and textile industry. One of central production of gambir in Indonesia is Pakpak Bharat District, North Sumatera Province. The purpose of this research were to getting information about technique of gambir processing in Sub-district of Pergetteng Getteng Sengkut and to comparing the quality of gambir with SNI 01-3391-2000. The method of this research was descriptive method using interview of respondent, then direct observation in field of gambir processing. The research showed that the technique of gambir processing generally was simple and used the traditional tools. The steps of gambir processing were boiling and compressing leaves, then the sap was got from compressed the leaves. After that, the sap was sedimented, drained to a paste form, and dried. The result of these research showed that the yield was 5.80% with the range from 5.26-6.04%. The moisture content of gambir from Simapera village was 15.38% and fulfilled the quality II, whereas the other villages in Sub-district Pergetteng Getteng Sengkut did not fulfill the quality requirements. Ash content and water-insoluble materials content were fulfilled the quality I and quality II.Keywords : Gambir, processing techniques, yield, moisture content, ash content, water-insoluble materials content

PENDUGAAN CADANGAN KARBON PADA TANAMAN BAMBU TALANG (Schizostachyum brachycladum Kurz.) DI HUTAN RAKYAT BAMBU DESA PERTUMBUKAN KECAMATAN WAMPU KABUPATEN LANGKAT Hafizah Arinah; Muhdi Muhdi; Irawati Azhar
Peronema Forestry Science Journal Vol 5, No 2 (2016): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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The Chlorophyll vegetation is able to absorb CO2 from the atmosphere through photosynthesis, as well as the bamboo talang does. The purpose of this research was to account the carbon content in each section of bamboo talang (Schizostachyum brachycladum kurz.) and to determine the best allometric model to estimate the potential of carbon reserves in the bamboo talang in harvested-over areas in people forest bamboo, Village Pertumbukan. The research was carried out in two stages, namely the first stage was to take the data in the field and the second stage was to analyze the carbon content in each section of bamboo talang in the laboratory. The results showed that the best allometric model for estimating biomass and carbon mass of bamboo talang was W = 44.614-14.047D+1.26D2 and C = 20.159-6.390D+0.585D2. Biomass and carbon mass off bamboo talang in People Forest Bamboo Pertumbukan Village, District Wampu, Langkat were 5.85 ton/ha and 2.82 ton C/ha, respectively. Keywords: Bambu talang (Schizostachyum brachycladum Kurz)., community forest, carbon stock, allometric models

ANALISIS BIOMASSA DAN CADANGAN KARBON BAMBU TALI (Gigantochloa apus Kurz.) DI HUTAN RAKYAT DESA SIRPANG SIGODANG KECAMATAN PANEI, KABUPATEN SIMALUNGUN Sihol Marito Malau; Muhdi Muhdi; Irawati Azhar
Peronema Forestry Science Journal Vol 5, No 2 (2016): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Forests absorb CO2 during photosynthesis and store it as organic matter in biomass plants, as well as bamboo plantations. This study aimed to : (1) analysis biomass and carbon stock (2) obtain a model Allometric estimation of carbon stocks in vegetation potential of oil palm plantations in North Sumatra; (3) obtain the potential carbon stocks in forest conversion to bamboo plantations in North Sumatra. This research was conducted in Forest Community Sirpang Sigodang Village, Subdistrict, Simalungun District. The research was carried out in two stages, namely the first stage were to data in the field and the second stage was analyze of carbon biomass and plant in the laboratory. Parameters measured in the field was wet weight, whereas in the laboratory is measured moisture content, volatile matter content, ash content and carbon content. Carbon plants in the plot were determined using allometric models bamboo carbon rods. Models the relationship between plant biomass or carbon rods with dimensions created with a method that describes the relationship Allometric biomass or carbon mass per plant as a function of the diameter. The results showed that the best model of allometric equations for estimating biomass and carbon mass of bamboo plantations was W= 81.324+22.411D+1.710D2 and C=45.979+12.792D+0.973D2 (W=biomass; C=carbon mass; D= diameter), resulting in biomass and carbon mass of tali bamboo plants respectively were 10.91 ton/ha and 5.49 ton C/ha. Keywords: Bambu tali (Gigantochloa apus Kurz)., Community Forest, biomass analisys, carbon stock, Sirpang Sigodang Village.

POTENSI HASIL HUTAN NON KAYU KELOMPOK PALMAE BERBASIS SISTEM INFORMASI GEOGRAFIS (SIG) DI KECAMATAN LUMBAN JULU KPHL MODEL UNIT XIV TOBASA Tarida Olivia A Hutapea; Rahmawaty Rahmawaty; Irawati Azhar
Peronema Forestry Science Journal Vol 5, No 2 (2016): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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As a family of Arecaceae generally Palmae is in the form of palm or shrubs. The purpose of this study was to identify and map the distribution of Non Wood Forest Production (NWFP) group palmae along with its standing in the utilization of the potential of NWFP by the community. Field data colected from March to May 2015. The method used is systematic sampling with ramdom start with 0.5% of sampling intensity. Mapping the distribution of use software ArcView GIS 3.3. Exploration results and the identification of palmae species from 19 ha of sample plots or 475 plots contained 707 palmae rod consisting of 2 sub-families and 7 species. The results showed that the most dominant species spreading is Hotang buar-buar (Calamus scipionum Loureiro) at an altitude of 1300 m above sea level and Bagot (Arenga pinnata) at 1400 m above sea level with IVI = 71,78%; and IVI = 113,75 %. The highest species diversity index value at an altitude of 1300 m above sea level 1,64. Keyword: KPHL Tobasa, HHNK, Palmae, GIS, Lumban Julu Sub Ditrict

MODEL ALOMETRIK BIOMASSA DAN MASSA KARBON BAMBU BELANGKE (Gigantochloa pruriens Widjaja.) DI HUTAN RAKYAT DESA SIRPANG SIGODANG, KECAMATAN PANEI, KABUPATEN SIMALUNGUN Yonri Situmorang; Muhdi Muhdi; Irawati Azhar
Peronema Forestry Science Journal Vol 5, No 2 (2016): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Bamboo has a high carbondioxide absorption, but quantitively this ability of bamboo belangke (Gigantochloa pruriens Widjaja.) has not much known. This research was conducted in the area of forest community Sirpang Sigodang village, Panei Sub District, Simalungun District. The research was carried out in two stages, namely the first stage were to data in the field and the second stage was analyze of biomass and carbon plant in the laboratory. Parameters measured in the field was wet weight, where as in the laboratory is measured moisture content, volatile matter content, ash content and carbon content. The results showed that the best model of alometric equations for estimating biomass and carbon of bamboo belangke (Gigantochloa pruriens Widjaja.) was W = 38.258-10.683D+0.854D2 and C = 14.994-4.139D+0.339D2. The potential of biomass and carbon contained in bamboo belangke (Gigantochloa pruriens Widjaja.) were 8.67 ton/ha and 4.05 ton C/ha. Keywords: Allometric Models, Babu belangke (Gigantochloa pruriens Widjaja), community forest, Sirpang Sigodang Viilage.

POTENSI TUMBUHAN OBAT DI CAGAR ALAM DOLOK SAUT, DESA PANSUR NATOLU, KECAMATAM PANGARIBUAN, KABUPATEN TAPANULI UTARA Marjuki Sihombing; Irawati Azhar; Yunus Afifuddin
Peronema Forestry Science Journal Vol 5, No 3 (2016): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Dolok Saut Preserve as a part of protected forest has many forest products potency, especially medical plants. However, data of medical plants that grow in the preserve had not been documented, so that need to be done of research to analyze the biodiversity and potential of medical plants in Dolok Saut Preserve. The purpose of the research was to know the potential and biodiversity of medical plants in Dolok Saut Preserve. The research had been done in November 2015 to December 2015. The method that used is purposive sampling plots with 20x20 meter square width. The species and the quantity of medical plants that found at preserve was identified.The result of medical plants biodiversity showed 12 species of medical plants. The biodiversity of medical plants in Dolok Saut Preserve at undergrowth stafe was 2,07, seedling stage was 0,23, saplings stage was 0,43, poles stage was 0,38, and trees stage was 0,58. Keywords : biodiversity, Dolok Saut Preserve, medical plants

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