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Peronema Forestry Science Journal
Published by Universitas Sumatera Utara
ISSN : -     EISSN : -     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Arjuna Subject : -
Articles 23 Documents
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Search results for , issue "Vol 5, No 1 (2016): Peronema Forestry Science Journal" : 23 Documents clear
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.
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
KEBERADAAN FUNGI SELULOLITIK PADA TANAH BEKAS ERUPSI GUNUNG SINABUNG DI KABUPATEN KARO Dendi Parasian Pane; Deni Elfiati; Delvian Delvian
Peronema Forestry Science Journal Vol 5, No 1 (2016): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

Volcanic dust expelled while eruption have a sour potential of hydrogen and the result led to a decrease in the diversity various and microorganism population. The fungi are important instrument in the process of decomposition of organic material for all types of soil. The fungi selulolitic have the ability to hydrolyze the cellulose naturally through it’s cellulose activity. This research aims to study the presence of selulolitic fungi contained on land under forest stands are former eruption of Sinabung Mountain in Karo District. Soil sampling was done with diagonally composite. Soil samples exposed to the eruption consisted of two samples that volcanic dust with a depth of 0-5 cm and mixed with volcanic dust soil to a depth of 5-20 cm, while for the control of soil samples consisted of a sample of the soil to a depth of 0-20 cm. The isolation of fungi and identification were done in the laboratory of Soil Biology, Agroecotechnology, Faculty of Agriculture, University of Sumatera Utara. This research was carried out from March 2015 until May 2015. The results showed that there were 4 types of selulolitic fungi found in soil samples affected by volcanic dust and are not affected by volcanic dust, namely Aspergillus, Penicillium, Rhizopus, and Trichoderma.Keywords : volcanic dust, former eruption land, cellulose, selulolitic fungi
IDENTIFIKASI JENIS-JENIS MANGROVE YANG BERMANFAAT SECARA EKONOMI BAGI MASYARAKAT DI PULAU SEMBILAN DAN PULAU KAMPAI, KABUPATEN LANGKAT Eka Sapta Prasetya Silalahi; Budi Utomo; Yunasfi Yunasfi
Peronema Forestry Science Journal Vol 5, No 1 (2016): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

The destruction rate of mangrove in Indonesia progressively increased and the economy level , especially coastal people became higher. Therefore, it’s necessary to identify what type of mangrove that can economically profitable for society. The purpose of this research was to identify type’s of mangrove that beneficial economically to society in Kampai and Sembilan Island, knowing the utilization of mangrove that valuable in economy as well as the role and participation of people in the management and utilization of mangrove. The method that used is descriptive interviews and direct observation. The result showed the people in Kampai and Sembilan Island still have little knowledge about the mangrove, so that the people is difficult to utilize the mangrove maximally. The people of Kampai and Sembilan Island majority using mangrove from the economic side like wood for building , firewood and charcoal wood. The people use it for personal utilities. Type’s of mangrove that used in Sembilan island is Bakau (Rhizophora stylosa) and Api-api (Avicenia officialis) for building wood and firewood, while in Kampai Island type’s of mangrove that using is Bakau (Rhizophora stylosa) and Tengar (Ceriops tagal) for building wood and charcoal wood.Keyword: Economic Mangrove, Kampai Island, Sembilan Island
PENGGUNAAN BERBAGAI PUPUK KANDANG TERHADAP PERTUMBUHAN SUKUN (Artocarpus Communis Forst) PADA DAERAH TANGKAPAN AIR DANAU TOBA KECAMATAN HARANGGAOL HORISON Jonny L Hutabarat; Budi Utomo; Afifuddin Dalimunthe
Peronema Forestry Science Journal Vol 5, No 1 (2016): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

Forest area at catchment area Lake Toba reduced to thousands of acres, resulting in a lot of open land, the land’s ability to absorb water is reduced and became dry land so that land productivity declined catchment area Lake Toba. Breadfruit plants can increase the productivity of land and can be used as plant reforestation to prevent erosion. Manure is manure originating from livestock manure that can memperpaiki structure and texture of the soil, raising the soil absorption of the water, raising the activity of soil microorganisms and as a source of nutrients for plants. The purpose of this study was to determine the effect of various types of manure on the growth of breadfruit.Manure is used is chicken manure, duck manure, goat manure and cow manure. This study was conducted in September-November 2014, at the catcment area Lake Toba, District Haranggaol, Simalungun. Parameters measured were high seed, seed diameter, leaf area, crown area, number of leaves and leaf water content. The results showed that administration of various types of manure significant effect on the growth of breadfruit seeds and the best treatment is chicken manure.Keywords: manure, breadfruit, growth, catchment area
Identifikasi dan Pemetaan Pohon Sarang Orangutan Sumatera (Pongo abelii) di Kawasan Penyangga Cagar Alam Dolok Sibual-buali (Studi Kasus : Desa Bulu Mario, Aek Nabara dan Huraba) Etti Nur Cahyani; Anita Zaitunah; Pindi Patana
Peronema Forestry Science Journal Vol 5, No 1 (2016): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

The research was conducted in March – August 2014 in Bulu Mario, Aek Nabara and Huraba Villages. Research method used line transect and purposive sampling. This research aims to identification and mapping of the tree and nest of Sumatran Orangutan (Pongo abelii) in Dolok Sibual-buali Nature Reserve buffer zone (Bulu Mario, Aek Nabara and Huraba villages). The results showed that the most trees were used as the nest of Sumatran Orangutan (Pongo abelii) were  Syzygium sp. (Hau Dolok) and Quercus gemelliflora Blume (Hoteng) trees. The trees have the meeting branch, a series of many leaves and twigs, the trees weren’t Sumatran Orangutan’s feed with hight 11-15 m, diameter 20-30 m, branch pattern was adjacent, type of canopy was irregular shape and spherical, and nest high 11-15 m. The position of the nest is most commonly found nesting in position I (near by the main branch) and nest type is C (the nests are made of Orangutan still looks intact, but most of the leaves have started to wilt and there are small holes in the nests). The distribution of the nest and trees of Sumatran Orangutan (Pongo abelii) had clumped spasial patterns of distribution, with a dispersion index of 1.25, was on flat-very steep slope, altitude 401-1400 meters above sea level and had NDVI values 0.15-0.61, mixed plantation and secondary forests in the villages around of Dolok Sibual-buali Natural Reserve, exactly in Bulu Mario, Aek Nabara and Huraba villages.Keywords : Pongo abelii, Syzygium sp., Quercus gemelliflora Blume, Identification and Mapping of the Tree and Nest of Sumatran Orangutan
ANALISIS FINANSIAL PEMANFATAN DAN PENGOLAHAN DAUN JERUJU (Acanthus ilicifolius L) MENJADI BERBAGAI PRODUK OLAHAN (Financial Analysis of utilization and Processing of Jeruju Leaves (Acanthus ilicifolius L) Becomes Various Products) Eko Prayogo; Agus Purwoko; 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

Jeruju is one of mangrove commodities that can be found at various location including in Sei Nagalawan village. Most of the utilization of jeruju leaves still conventional and subsistence .jeruju utilization is still limited for the leaves and roots. At household jeruju leaves processing has been in Sei Nagalawan village it was process then into jeruju kerupuk and jeruju tea. According the study aim to know finansial feasibility leaves processing household jeruju, to know processing of jeruju leaves becomes various products, the financial feasibility and to know added value jeruju leaves in every production process in Sei Nagalawan village. This research was done in March 2015. Sampling was done by purposive and the method used in the form of cost and revenue analysis, RC Ratio analysis, Break event point analysis, and Added value analysis. This research showed that financially, jeruju kerupuk enough being product because its RC ratio more than one (1,17) and therefore jeruju tea enough being product because its RC ratio more than one (2,14). BEP total of jeruju kerupuk is 31 packs while jeruju tea is 7 packs and BEP price is about Rp 5.200,- per pack for jeruju kerupuk and Rp 4.700,-/ packs for jeruju tea. Added value for jeruju kerupuk is Rp 49.577,-/kg, and for jeruju tea is Rp 81.150,-/kg. Market opportunity is still possible, because it's still rare in market. Strategic area of  Sei Nagalawan village will support access to market.Key words : Jeruju Leaves, financial analysis, added value, Jeruju Kerupuk product, Jeruju Tea.

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