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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
 27   28   29   30   31 
RESPON CYLINDROCLADIUM SP. TERHADAP FUNGISIDA BERBAHAN AKTIF METIRAM SECARA IN VITRO Sri Martina Suseno; Edy Batara Mulya Siregar; Ridwanti Batubara
Peronema Forestry Science Journal Vol 5, No 3 (2016): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

Cylindrocladium sp. is a pathogen cause disease that attack eucalyptus and  it  was the highest type of disease that attack eucalyptus in toba pulp lestari. Fungicide was used to eradicate and prevent the growth of pathogens. One of the fungicide which  used was systemic fungicide with active substance metiram 70 %. The purpose of this study was to measure the area, diameter, density of the spore ,and to characterize the hyphae form of Cylindrocladium sp after being treated metiram 70 % in vitro in different concentrations. Sample that used taken from cylindrocladium collection from previous research. The result of this study showed that the most efective concentration of fungicide treatment in inhibiting growth and development area of cylindocladium sp was treatment 2,0 mg/ml. In observation of spore density and hyphae structures of cylindrocladium sp, the fungicide that given was able to give tangible effect but in observation of relative inhibiton, concentration of fungicide gave intangible effect in providing inhibition to pathogen of cylindrocladium sp.Keywords: eucalyptus, cylindrocladium sp, fungicide, metiram, in vitro
Pertumbuhan Dan Perkembangan Akar Semai Mangrove Sejati Ceriops tagal (Perr.) C.B.Rob Pada Berbagai Salinitas Marnida Uli Lubis; Mohammad Basyuni; Budi Utomo
Peronema Forestry Science Journal Vol 5, No 3 (2016): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

The deforestation of mangrove caused by human activities to the effected the composition of mangrove forest stand. It is therefore needed for mangrove rehabilitation to  restore mangrove ecosystem. Growth and root development of mangrove seedlings Ceriops tagal (Perr.) C.B.Rob under different salinity was studied in the greenhouse, Faculty of Agriculture, University of Sumatera Utara, started from 22nd May until 22nd November 2015. This study was aimed at  determining the level of seedling growth and root development under C. tagal seedlings under different salinity. This research used the completely  random design (CRD) with 5 treatment, namely 0%, 0,5%, 1,5%,  2%, and 3% for 10 replication. The best result showed that growth and seedlings development was obtained at 0,5% salinity, high growth of seedlings at 0,5%, diameter at 0,5%, number of leaf at 0,5%, leaf area  at 0,5%, thick leaves at 0,5%, number of root at 0,5%, length roots at 2%, root diameter at 0,5%, the water content of the root 0%, the water content of the shoot 0,5%, and the ratio of root and shoot at 0,5%. Keywords : Mangrove,  Ceriops tagal, salinity, root
APLIKASI AKTIVATOR UNTUK MEROMBAK ECENG GONDOK (Eichhornia crassipes (Mart.) Solms.) DARI DANAU TOBA MENJADI PUPUK ORGANIK Juliani Juliani; Afifuddin Dalimunthe; Budi Utomo
Peronema Forestry Science Journal Vol 5, No 3 (2016): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

Organic fertilizers such as compost is a natural fertilizer to add nutrients in the soil.Compost can be regarded as the product of fermentation of organic materials with a large number of microbes.The addition of activators or inoculum on the composting is part of an effort to accelerate the composting process. This research was done in November 2015 until January 2016 in experimental garden land USU campus in Padang Bulan, Medan. The experiment used a factorial randomized complete block design (RAK) factorial consisting of two factors.The first factor is the type of organic material consists of two levels the water hyacinth (Eichornia grassipes (Mart.) Solms.) smooth (A1) and the water hyacinth (Eichornia grassipes (Mart.) Solms.) rough (A2) and the second factor is the source of an organic activator which consists of four level without the type of activator (control) (B0), Mol fruit with vegetables (B1), Tape, tempe, with yakult (B2), and EM4 (B3). The parameters observed were comparison of temperature, pH and C/N ratio.The results of research showed that of water hyacinth (Eichornia grassipes (Mart.) Solms.) on some kind of local microorganisms (MOL) as fruit with vegetables (B1) MOL, Tape, tempe, with yakult (B2) MOL, and EM4 (B3) MOL, gives good the results of temperature, pH and C/N ratio of compost. Key words : Organic fertilizers, activators, the temperature  of  pH, the ratio of  C/N.
KEANEKARAGAMAN JENIS KANTONG SEMAR ( Nepenthes spp. ) DI CAGAR ALAM DOLOK SIBUAL-BUALI Muhaimin Zikri Pratama; Pindi Patana; Yunasfi Yunasfi
Peronema Forestry Science Journal Vol 5, No 3 (2016): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

Nepenthes is a carnivorous plant that has a unique bag, each end of the leaf. This unique bag can trap insects or other small animals, as in the pocket there is nectar glands (glands honey) that can trap insects especially with the sweet taste. This research was conducted in the Nature Reserve Dolok Sibual Buali from August until October 2014. This study aims to determine the diversity of plant species in the area of ​​Nepenthes Nature Reserve Dolok Sibual-Buali, North Sumatra and Knowing dominance Nepenthes plants are found in the Nature Reserve Dolok Sibual -Buali, North Sumatra. This survey using the cluster method to determine the area of ​​the sample is based on consideration of the existence of Nepenthes (searching the sample). From the research results can be seen, there are 5 types of Nepenthes in Cagar Alam Dolok Sibual Buali, namely N. Bongso  N. ovata, N. reinwardtiana, rhombicaulis N., and N. tobaica. Total clumps most is N. reinwardtiana with 169 clumps and clumps least number is N. ovata with 54 clumps. Keywords: Cagar Alam Dolok Sibual Buali, species diversity, Nepenthes.
ANALISIS DAN PENGEMBANGAN KAWASAN WISATA KAWAH PUTIH KECAMATAN SILAU KAHEAN, KABUPATEN SIMALUNGUN, PROVINSI SUMATERA UTARA Polman Roni Tua S; Siti Latifah; Pindi Patana
Peronema Forestry Science Journal Vol 5, No 3 (2016): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

Kawah Putih Dolok Tinggi Raja is a target destination of tourist attraction in Simalungun. One of the benefits that can be gained is the development of natural forest areas for ecotourism. This study aims to (1) analyzing the potential attraction to Kawah Putih for the development of ecotourism. (2) to analyze the problems of nature tourism development strategy in the region SWOT attractions. This researched used Analysis SWOT. The result showed that the Attraction Nature Kawah Putih  has decent potential to be developed on the level 72,91%, and the feasibilty of the SWOT of analysis are quadran I, which means to have strength and opportunities can develop a tourist attraction. Keyword : development, Kawah Putih, potential attractions, Simalungun District
PENDUGAAN CADANGAN KARBON ABOVE GROUND BIOMASS DI KECAMATAN LUMBAN JULU KABUPATEN TOBA SAMOSIR Desrina Natalia Manalu; Rahmawaty Rahmawaty; Riswan Riswan
Peronema Forestry Science Journal Vol 5, No 3 (2016): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

The destruction of forests, climate change and global warming, causing indirect benefits from the forest is reduced, because the forest is the largest carbon sink and play an important role in the global carbon cycle. In order to reduce the rate of global warming, this study estimated the potential of carbon stock. The study aimed to calculate carbon stocks above ground biomass in Lumban Julu Sub-District. This study was conducted in February to May 2015 in Lumban Julu Sub-District, Toba Samosir District. Non destructive method were used in this study. Parameters measured in the field were diameter breast height (DBH) and height of the tree.The result showed that the amount of carbon content in above ground biomass in Lumban Julu Sub-District stands in Jangga Toruan Village and Jangga Dolok Village, respectively by 202,59 ton/ha and 204,79 ton/ha. The value of the carbon content in Lumban Julu Sub-District classified as good. Keywords: Above ground biomass, carbon cycle, global warming, Lumban Julu, Toba Samosir
IDENTIFIKASI POHON PLUS DI KECAMATAN LUMBAN JULU KPHL MODEL UNIT XIV TOBA SAMOSIR San France; Rahmawaty Rahmawaty; Mohammad Basyuni
Peronema Forestry Science Journal Vol 5, No 3 (2016): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

The need for quality seed source is found to be a very important thing today, a lot of land rehabilitation work to be performed due to the large number of illegal logging and deforestation. The need for quality seeds which can be used as a seed source for the development of land rehabilitation. This study aimed to identify the source of the seeds in the form of seed gardens in the area of model XIV Toba Samosir ​​Protection Forest Management Unit, Lumban Julu Sub-District. This research was conducted from March to August 2015. Scoring method of plus trees , and  0.04 % of sampling intensity were used in this research , with a total area of ​​3761 Ha in the observation plots can be as much as 38 Plot observation, with a distance of each plots was 300 meters and each plot measuring 20 m x 20 m. Microsoft Excel were used in this research. The Results  showed 15 individuals was identified as plus trees, they are 8 Pine (Pinus merkusii), among of them was found 3 was  identified in Motung Village, 5 was in Pasar Lumban Julu Village. Furthermore 3 was Jelutung trees (Dyera costulata), 1 was identified in Jangga Dolok Village, 2 was in Pasar Lumban Julu Village, and then 4 was Puspa trees (Schima walichii), 1 was identified in Jangga Dolok Village. and 3 was in Pasar Lumban Julu Village.Keywords: Forest Management Unit, Plus Trees, Scoring Method, Seed, Toba Samosir
KLASIFIKASI PENGGUNAAN LAHAN DI HUTAN KEMASYRAKATAN KESATUAN PENGELOLAAN HUTAN LINDUNG MODEL UNIT XIV TOBA SAMOSIR Dea Kartika Br Pinem; Rahmawaty Rahmawaty; Abdul Rauf
Peronema Forestry Science Journal Vol 5, No 3 (2016): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

Toba Samosir Forest  Management Unit has a Community Forest (HKm) managed by Farmers Group Association Sibisa Motung. This study aimed to classify land use in community Forest at Toba Samosir Forest Management Unit. The research was conducted from April to May 2015 using the Stratified Random Sampling method. The results showed that there are six land use system in HKm, that is the type of combination of forest trees and perennial plants (PlPhTh), the type of combination of forest trees, perennial plants and vegetable plants (PlPhThTs), the type of combination of forest trees, perennial plants and fruit plants (PlPhTtPb), the type of combination of forest trees, vegetable plants and fruit plants (PlPhTsPb), the type of combination of forest trees and vegetable plants (PlTtPb), type of forest trees, perennial plans, vegetable plants and fruit plants (PlPhTtTsPb) and spread in village Motung, village Pardamean Sibisa and village Sigapiton. Combination type of forest trees, perennial plans, vegetable plants and fruit plants are either applied for maximing farmland and provide economic benefits for farmers. Keywords: Land Use Classification, Community forest, Forest Management Unit, Toba Samosir,
UJI POTENSI FUNGI PELAPUK PUTIH DARI BATANG KAYU EUKALIPTUS (Eucalyptus deglupta) SEBAGAI PENDEGRADASI LIGNIN Ridho Perdana Ompusunggu; Edy Batara Mulya Siregar; Lutfhi Hakim
Peronema Forestry Science Journal Vol 5, No 3 (2016): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

Lignin is a heterogeneous polymer and complex structure consisting of koniferil alcohol, sinaphil alcohol, and kumaril alcohol making it difficult to overhauled. The complex structure of lignin with high molecular weight and insoluble in water makes lignin difficult to degrade. The purpose of this research is to get white rot fungi in biopulping process by measuring the activity of Lignin Peroxidase Enzime (LiP) at white rot fungi which is obtained. The sample of rotten eucalyptus wood taken from Taman Hutan Raya (Tahura) Berastagi. Bavendamm test have found three genus of fungi which are Phanerochaete sp. 1, Phanerochaete sp. 2, Trametes sp. The highest activity of lignin peroxidase enzyme was produced by Phanerochaete sp. 2. Key words: Eucalyptus wood, White rot fungi, Bavendamm test, lignin peroxidase enzyme
Respon Phaeophleospora sp. Terhadap Fungisida Berbahan Aktif Metiram Secara in Vitro Josua M Sitanggang; Edy Batara Mulya Siregar; Ridwanti Batubara
Peronema Forestry Science Journal Vol 5, No 3 (2016): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

Phaeophleospora sp is one of diseases which attack eucalyptus plant particulaily on eucalyptus nursery. This disease has been spread almost in the whole world. North Sumatera Control of the disease itself still use a fungicide and one of them is the fungicide active ingredient Metiram 70%. The purpose of this reseaech is to know the response of Phaeophleospora with fungicide Metiram substance 70% treatment with 0,4 ,0,8 ,1,2 and 1,6 mg/ml as concentrate. Response which measured was colony growth (wide, diameter, spora density, and change that happened to hifa). Research conducted at Forest Biothechnology Laboratory and Pest Plant Pathology Laboratory, Agriculture Faculty, University of North Sumatera. Used general linear non factorial with five times repetitions.        The 70% metiram treatment in 0,4, 0,8, 1,2 and 1,6 mg/ml  significant to the growth (wide, diameter, barriers relative and spore density) and also caused swelling on hyphae and change of form, tekstur and the color of colony Phaeophleospora sp. in vitro.Keywords : Phaeophleospora sp, Response In Vitro, Metiram 70%

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