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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 304 Documents
 13   14   15   16   17 
GANGGUAN HUMUS HUTAN DI TAHURA YANG BERBATASAN DENGAN LAHAN PERTANIAN MASYARAKAT, DESA DOLAT RAYAT KABUPATEN KARO Bangun Sikettang; Budi Utomo; Afifuddin Dalimunthe
Peronema Forestry Science Journal Vol 4, No 3 (2015): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

The forest is seen as an ecosystem, because forest is formed or composed by many components, each component can not stand on its own, can not be separated, even interplay and interdependence. One component forests have an important role to the availability of nutrient cycling in the forest is humus. Humus is part of the composition of the forest has its own function in maintaining the balance of nature. Without humus, then the forest will lose its function in maintaining the stability of the hydrological cycle and soil nutrient cycling. Accordingly, this research aims to detect differences in the thickness of humus at a distance of  0-500 m of agricultural land society, to determine the distance to the forest by forest communities Dolat Rayat villages, districts of Karo, and determine the impact of forest humus decision on vegetation For seedling and saplings. This research showed that the availability (thickness) humus in Forest Park (TAHURA) bordering agricultural land within the community is varied from 0-500 m and impaired. Withdrawal of forest humus reaches a distance of 250 m, and humus began to stabilize in thickness at a distance of  350 m into the forest. Withdrawal of humus also affects the amount and type of vegetation growing in the forest so that species diversity of an area to be low. In areas that do not damage the forest and humus disturbance to the number of individuals, and higher species diversity. Keywords: Forest Humus, Vegetation, Nutrient Cycle, Agricultural Land, Society
PEMANFAATAN BERBAGAI JENIS FUNGI UNTUK MENINGKATKAN PERTUMBUHAN Rhizophora apiculataDI DESA NELAYAN INDAH KECAMATAN MEDAN LABUHAN Rachel Nababan; Yunasfi Yunasfi; Mohammad Basyuni
Peronema Forestry Science Journal Vol 4, No 4 (2015): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

Mangrove rehabilitation is one of effort to save mangrove forest. Utilization of fungi as decomposer support to increase the plantation growth for rehabilitation. Fungi as microorganism may reduct material organic. The research gives information about the fungi  species in which to increase the growth of R. apiculata seedlings and can be used in rehabilitation of mangrove forest. The study was conducted from September 2014 to January 2015 using a completely randomized design (CRD) with treatment application types of fungi and five replications. There are three types of fungi namely A. flavus, A.terreus, T. harzianum, and control.  Utilization of T. harzianum treatment gave the best results of R. apiculata  seedlings, with an average height of 17.00 cm, diameter of  0.69 cm, leaf area of  743.36 cm2, total dry weight of 29.64 g. Compared to the control with average height of  7.36 cm,  0.54 cm of diameter, leaf area of  653.31 cm2, and 27.37 g of total dry weight.Keywords: rehabilitation, fungi, Rhizophoraapiculata, mangrove
SEBARAN SUKUN DAN PERSEPSI MASYARAKAT TERHADAP SUKUN (Artocarpus communis Forst) PADA DAERAH TANGKAPAN AIR DANAU TOBA DI NAGORI PURBA SARIBU KECAMATAN HARANGGAOL HORISON KABUPATEN SIMALUNGUN Jordy M Manurung; Budi Utomo; Afifuddin Dalimunthe
Peronema Forestry Science Journal Vol 4, No 4 (2015): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

Forests and land in the catchment area of Lake Toba, showed a decrease for  quality and quantity of the land. This study aims to determinethe public perception of breadfruit (Artocarpus communis Forst). Research carried out in the catchment area of Lake Toba, Simalungun. Analysing public perception using a questionnaire. Data from the questionnaire were analyzed by descriptive quantitative.  Perceptionis influencedby factors of age, education, livelihood and long lived. Research shows that there is a breadfruit distribution point in Haranggaol. Public perception of the breadfruit (Artocarpus communis Forst) is good. Where 58.41% of the people know and understand the benefits of breadfruit.Keywords: Breadfruit (Artocarpus communis Forst), Distribution of Breadfruit, Community Perception, Forest, Catchment Area
ANALISIS POTENSI DAN PENGARUH WAKTU PENYIMPANAN BUAH TERHADAP MUTU MINYAK KELAPA SAWIT TIPE DURA, PISIFERA, DAN TENERA DI KEBUN BANGUN BANDAR, DOLOK MASIHUL, SUMATERA UTARA Nofrizal Amri; 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

Indonesia is currently the largest producer palm oil in the world with its production about 33.000.000 ton/year in 2014. This research is dealing with potency and quality of palm oil types of dura, pisifera and tenera based on time storage of fruit (0, 7, 14, 21, 28 days). The research was performed on August to December 2014, in Bangun Bandar plantation, Dolok Masihul, North Sumatera. Parameters measured for oil potency was crude palm oil (CPO) content and for quality of palm oil were β-carotene content, deterioration of bleachability index (DOBI),  free fatty acid content, and moisture content β-carotene content and DOBI were analyzed by Spectrophotometer at 446 nm and 269 nm. Free fatty acid was determined by titration, and moisture content was measured by an electronic moisture analyzer.  Results showed that potency of palm oil types of dura, pisifera, tenera were 23,5 %, 26,2 %, 23,6 %, respectively. β-carotene content and DOBI of palm oil types of dura, pisifera, and tenera were decreased by time storage of fruit. Free fatty acid and moisture content of palm oil types of dura, pisifera, and tenera were increased by time storage of fruit. Based on the results, time of storage of fruit affected poorly in quality of palm oil. Keywords: palm oil, quality, potency, type of oil palm.
ANALISIS KERUGIAN EKONOMIS DAN PEMETAAN SEBARAN SERANGAN RAYAP PADA BANGUNAN SMP NEGERI DI KOTA PEKANBARU Meita Endasura; Yunus Afifuddin; Lutfhi Hakim
Peronema Forestry Science Journal Vol 4, No 1 (2015): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

Termites are pests that can cause the damage to buildings and can make a big economic losses.The Junior High school building is one of the object that target by termites which haven’t been studied and investigated. This study intend to get the value of economic losses caused by termites attack toward the Junior High School buildings in Pekanbaru. The dis- tribution of termites mapped using Geographic Information System (GIS). The method used was direct observation, in- terviews using questionnaires and analyze the damage to buildings using a tally sheet. The result showed that 75% of The Junior High School building were attacked by the termites and 25% of The Junior High School building weren’t at- tacked by the termites.48% of the The Junior High School building have medium damage and 27 % have small dam- age.Termite species found are Cryptotermes cynocephalus Light for dry wood termites and Microtermes inspiratus Kemmer for subterranean termites  Keywords: Termites, The Junior High School buildings, Economic losses, Geographic information system (GIS)
Produktivitas Getah Pinus (Pinus Merkusii Jungh Et De Vriese) Berdasarkan Ketinggian Tempat dan Konsentrasi Stimulansia Asam Cuka (C2H4O2) Arvand Samosir; Ridwanti Batubara; Afifuddin Dalimunthe
Peronema Forestry Science Journal Vol 4, No 2 (2015): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

The Production of oleoresin is affected by the application of stimulant and effect of elevation. The purpose of this research were to know the effect of  C2H4O2 stimulant and effect of elevation to P. merkusii and to know the C2H4O2 concentration and the best of elevation. This research were carried at working area of PT. Inhutani IV, Siborong-borong in March – April 2014 using factorial randomized block design with two factors, i.e. the concentration of stimulant (0, 10, 20 and 30%) and elevation (900 m, 1050-1150 m, 1150-1250 m,  1250-1350 m and 1350-1400 m). Parameter measured were quality and quantity of oleoresin (gram). Result of this research showed that the application of C2H4O2 stimulant on the tapping of pine trees increase considerably to oleoresin. The concentration of C2H4O2 (30%) and the elevation 900 meters  can gave the best product of oleoresin, i.e. 154,15 grams/tree/month. Quality of oleoresin were got at this research was B quality.Key word : P. merkusii, resin, stimulant, elevation.
STUDI KOMPARASI SNI 01-4449-2006 DENGAN JIS A 5905 : 2003 . Ulfah Hanum Nasution; Yunus Afifuddin; Lutfhi Hakim
Peronema Forestry Science Journal Vol 4, No 1 (2015): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

Japan and Indonesia has own criteria in determinating the applicable standards for fiberboard in accordance with the development of industry in each country. JIS and SNI have differences and similarities that are only applicable in their respective countries so that the necessary information to evaluate these standards in order to be valid not only in each country. The purpose of this research is to compare SNI 01-4449-2006 with JIS A 5905-2003. Data analysis was done  by using descriptive comparative technic that is compare standards specified in SNI 01-4449-2006 with JIS A 5905-2003 so that known differences and similarities of each standard. Result of the comparition between the parameter of JIS A 5905-2003 and SNI 01-4449-2006 show that the overall standard is different. The difference between these two standardsis available on the parameters of normative parameters of mold thickness, length and width, provided that te testing and measurement of test samples. JIS A 5905-2003has testing standards for fire resistance test and resistance for weather and  SNI 01-4449-2006 doesn’t have that testing standards. Based of the comparition of the parameters between JIS A 5905-2003 and SNI 01-4449-2006, it can be concluded that JIS A 5905-2003is more complete than SNI 01-4449-2006.Keywords: Indonesia National Standard, Japanese Industrial Standar, Compare.
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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Abstract

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 Diameter dan Konsentrasi Stimulansi Asam Cuka (C2H4O2) Terhadap Produktivitas Getah Pinus (Pinus merkusii Jungh et de Vriese) Juki Pimroi Hutabalian Hutabalian; Ridwanti Batubara; Afifuddin Dalimunthe
Peronema Forestry Science Journal Vol 4, No 3 (2015): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

The Production of oleoresin is affected by the find out of stimulant and effect of diameter. The purpose of this research were to know the effect of C2H4O2 stimulant and effect of diameter to P. merkusii and to know the C2H4O2 concentration and the best of diameter. This research were carried at working area of PT. Inhutani IV, Siborong-borong in Maret – April 2014 using factorial randomized block design with two factors, i.e. the concentration of stimulant (0%, 10%, 20% and 30%) and diameter (25-30 cm, 31-35 cm, 36-40 cm and 41-45 cm). Parameter measured were production of oleoresin (gram). Result of this research showed that the application of C2H4O2 stimulant on the tapping of pine trees increase considerably to oleoresin. The application of C2H4O2 resulted in more than 2 – 4 times the yield of oleoresin from tree without stimulant. The concentration of C2H4O2 (30%) and the diameter 41-45 cm can gave the best product of oleoresin.The lowest sap production is 10.12 gram in each tree per a mounth and the highest production is 176.30 gram in each tree per a mounth.Key word : Pinus merkusii, Resin, Stimulant, Diameter
Sifat Fisis dan Mekanis Kayu Karet(Hevea brasiliensis MUELL Arg) Bekas Sadapan dan Kayu Karet tanpa Sadapan Rudy Hartono Sipahutar; Tito Sucipto; Apri Heri Iswanto
Peronema Forestry Science Journal Vol 4, No 1 (2015): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

Rubber wood asone of light conctruction material was produced from community forest.  The objective of theseresearch was to evaluatethe physical and mechanical properties of tapping and untapping rubber wood for considering as construction materials.physical and mechanical testing refers to british standard (BS:373-1957). The result of these research showed that physical properties value such as air dry moisture content, specivic gravity, and longitudinal, radial, tangential shrinkage were 13,46-22,43%, 0,61-0,73,0,62-1,32%, 1,05-3,65% and 2,39-5,30%respectively for tapping rubber wood.  Furthermore forthe similar patameter, untapping rubber wood were 7,44-14,68%, 0,57-0,71 and 0,6-2,09%, 1,27-4,13%, 2,5-5,35% respectively.The mechanical properties value included of moe,mor, parallel compression strength, and hardness for tapping and untapping rubber wood were 67813-129480 kg/cm2 and52759-107817 kg/cm2, 751,61-1071,68 kg/cm2 and 649-899,74  kg/cm2, 83,79-148,43 kg/cm2 and 80,54-137,88  kg/cm2, 16,99-21,94 kg/cm2 and 12,7-17,9 kg/cm2 respectively.Key words: rubber wood, tapping and untapping, physical and mechanical properties

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