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Ridwanti Batubara
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Jenis, Potensi dan Nilai Ekonomi Hasil Hutan yang Dimanfaatkan Masyarakat sekitar Tahura Bukit Barisan Faujiah Nurhasanah; Ridwanti Batubara; Oding Affandi
Peronema Forestry Science Journal Vol 1, No 1 (2012): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

TAHURA Bukit Barisan represent a forest bunch which is have direct interaction between people and forest. Doulu and Jaranguda Village is around Tahura area. Therefore was conducted   research to know type, potency  and economic value of forest product which  exploited  by society around TAHURA. The method that is used to determine  the respondent is snowball sampling method. Based on interview on  responden, type of forest  product which  exploited by  people around TAHURA area are  regen bamboo, bulak bamboo, medical plant, honey and animal . The biggest Economics value at both village  is Bamboo Regen exploiting equal to Rp.1.069.256.000,00. Forest provide a major contribution to public life. Key words : TAHURA, type, economic value, contribution
PENILAIAN EKONOMI SAMPAH KERTAS DI KOTA MEDAN Ori Yani Yunilda; yunus afifuddin; Ridwanti Batubara
Peronema Forestry Science Journal Vol 1, No 1 (2012): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

Problems were caused by used paper in each area are common problems, especially in urban area, for example Medan city. Types rubbish were generated from household level to the level of industries different, namely organic and inorganic. Example of organic rubbish is a used paper. One of the countermeasures for used paper are not to accumulate by collecting and selling used paper for recycling. The purpose of this study was to identify source used paper, the economic value and the benefits and the flow of marketing of used paper were collected and sold by people in the city of Medan. Based interviews with respondents, the source used paper were from household, market, office, shop and newspaper distributor. The greatest economic value is major collector that Rp. 115.162.500,- of year per respondent. The lowest economic value is collector that Rp. 1.055.000,- of year per respondents. Collected and sold of used paper while were contributing to the collectors that 27,85 % to total income respondents of month; the minor collectors that 38,87 % to total income respondents of month and the major collectors that 68,96 % to total income respondents of month. The flow are marketing of used paper from collectors, minor collectors, major collectors and end at the used paper mill. Key words: used paper, Medan, contribution, economic value
ANALISIS PEMASARAN KEMENYAN (Styrax spp.) (Studi Kasus : Kec. Pollung, Kab. Humbang Hasundutan) Bobby Raya Simanjuntak; yunus afifuddin; Ridwanti Batubara
Peronema Forestry Science Journal Vol 1, No 1 (2012): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

Forest incense owned District Pollung potential managed and marketed for economic improvement. It aims to analyze the marketing groove incense, knowing economic value from incense and determining marketing strategies in District Pollung, District Humbang Hasundutan. The method applied is purposive sampling with total sample of 40 (forty) respondents. Data collected through observation and analysis problems with interviews using questionnaires to farmers and entrepreneurs incense. Overall data, both primary and secondary, then tabulated according to need. The value of highest profit margins obtained farmers on market II, amounting to 72.22% and the smallest profit margins in the village collecting 10% on market I. The largest average income is equal Rp.2.829.400/ family leader/month in Pandumaan. While the smallest income of Huta Paung Utara Rp.1.024.600/family leader/month. Strategic marketing priorities incense is formed farmer groups and cooperatives at the village, the supervision of the marketing system incense, incense sustainable management, human resource and the use of incense superior seedlings. Keywords: incense, marketing, economic value and marketing strategy
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.
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
TINGKAT KESUKAAN MASYARAKAT TERHADAP TEH DAUN GAHARU (Aquilaria mallacensis Lamk.) DIBANDINGKAN TEH LAIN YANG BEREDAR DI PASARAN Roy Brema Ginting; Ridwanti Batubara; Herawaty Ginting
Peronema Forestry Science Journal Vol 4, No 3 (2015): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

Agarwood leaves contain chemical compounds such as flavonoid, flavons, flafonols and isoflavones that can be use as a brewed beverage. That has a function as an antioxidant. The objective of this research was to determine the consumen preference on agarwood leaf tea compared other tea on the market. Types of tea on the market were used as a comparison is C. cinencis tea and soursop leaf tea. This study was made in 4 stages i.e plant sampling, making agarwood leaf tea, determination of tannin content, and evaluation of consumen preference on agarwood leaf tea by hedonic test on taste, aroma, and colour using 1-5 scale i.e (very unlike-very like) for agarwood leaf tea at 0 and 2 month of storage. The highest to lowest of tannin content was found in C. cinencis tea (0,5464%),agarwood leaf tea (0,2571%), and soursop leaf tea (0,0643%). In the 0 month storage preference level of society against agarwood leaf tea is favored as seen from the scores obtained in terms of taste, aroma and colour that is 3,72; 3,10; 2,42. For the agarwood leaf tea that has been storage for 2 month, agarwood leaf tea still favored where the score for taste, aroma and colour were 3,34; 3,04; 2,36.Key words: agarwood tea, consumen preference, and hedonic test
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
MODIFIKASI TEKNIK PEMANENAN DENGAN PERLAKUAN FISIK DALAM UPAYA PENINGKATAN PRODUKTIVITAS GETAH KEMENYAN TOBA (Styrax sumatrana) Septborn Winner Simamora; Muhdi Muhdi; Ridwanti Batubara
Peronema Forestry Science Journal Vol 4, No 1 (2015): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

Styrax sumatrana is one of the flagship plant in North Sumatra which has enough potential to be developed. The research was to know frankincense sap productivity Toba (S. sumatrana) with the modification of the physical treatment by being hit and treated with aluminum foil and closed with a combination of both. Making scractch is done by maked cuts in the skin in a vertical line with a length of 2-3 cm with a depth (depending on the thickness of the skin) to the wood. The results showed that treatment with a physical beating and beating and closure combination significantly different physical treatment, closure, while the physical treatment with a combination of beating and beating and closing were not significantly different. The best in productivity of Styrax sumatrana  is beating and combination, the value is 437,82 g/tree/year.Keywords: Styrax sumatrana, sap, modified harvesting techniques, physical treatment
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
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%
Co-Authors ABDUL RAUF Afifuddin Dalimunthe Arvand Samosir Bobby Raya Simanjuntak Edy Batara Mulya Siregar Estri Yosa Damanik Faujiah Nurhasanah Herawaty Ginting Janter Bronson Samosir Josua M Sitanggang Juki Pimroi Hutabalian Hutabalian Luthfi Hakim Mohd Hasmadi Ismail Muhdi Muhdi Oding Affandi Ori Yani Yunilda Rahmawaty Rahmawaty, Rahmawaty Rizki khadijah Harahap Rizky Amalia Roy Brema Ginting Seca Gandaseca Septborn Winner Simamora Sintike Frastika Sri Martina Suseno Surjanto Surjanto Yunus Afifuddin