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Radiosensitivity and the Influence of Gamma Rays Irradiation on Local Samosir Shallots Mariati Sinuraya; Rosmayati Rosmayati; Hasanuddin Hasanuddin; Diana Sofia Hanafiah
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 5, No 2 (2015): Life Sciences
Publisher : Syiah Kuala University

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Abstract

Bulbs  of    localSamosir  Shallot  with  the  weight  ranging  from  1,3  to1,7  g  were  irradiated  by  several doses of gamma rays in order to investigate the radiosensitivity and the effects of irradiatons on the plants. Dry bulbs 2,5 months after harvest were exposed to gamma raysradiation ranging from 0 Gy to  20  Gy  to  determine  their  responses  to  radiation  stress  and  the  effective  radiation  dose  for identification of Lethal dose 50 (LD50). Percentage of shoot growth was measured on 35th days after planting. The variation in morphological and agronomic characters were also determined.  The results indicated  that  increasing  doses  of  gamma  irradiation  had  significant  effect  on  shoot  growth. Increasing  in  gamma  rays  doses  from  0  Gy  to  11Gy  had  little  effect  on  percentage  of  shoot growth.With  the  increase  in  radiation  dosesabove  11Gy,  agreat  reduction  in  percentage  of  shoot growth  was  observed  in  irradiated  bulbs  as  compared  to  control.  The  LD50  values  of  local  Samosir Shallot  determined  from  linear  regression  analysis  (using  Curve-fit  Analysis    software)  based  on percentage  of  regenerated  shoot  growth  was  11.60  Gy.  There  were  also siqnificantdifferenciesbetweenregenerated  plants  growth  from  irradiated  bulbs  and  control (unirradiated).Treated bulbs produced shorther plant lenght and less leave number
Struktur dan Komposisi Jenis Tegakan Semai dan Pancang di Hutan Alam Akibat Pemanenan Kayu dengan Teknik Reduced Impact Timber Harvesting Diana Sofia Hanafiah; Muhdi Muhdi
Biota : Jurnal Ilmiah Ilmu-Ilmu Hayati Vol 15, No 2 (2010): June 2010
Publisher : Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24002/biota.v15i2.2695

Abstract

The effect of reduced impact timber harvesting technique to structure and species composition of seedling and poles was studied using the data of three plots each sized 100 m x 100 m, which are placed randomly at landing, middle skiddtrail and tips of skiddtrail, respectively. The aim of the study was to know the effect of reduced impact timber harvesting technique to structure and species composition of seedling and poles in tropical forest. The research showed that the forest harvesting caused the changing of the structure and species composition of seedling and poles in natural tropical forest.
Pendugaan Cadangan Karbon Pada Tanaman Karet (Hevea brasiliensis Muell. Arg.) Umur 10 Tahun di Perkebunan Rakyat Desa Tarean, Kecamatan Silindak, Kabupaten Serdang Bedagai Evan Satria Saragih; Muhdi Muhdi; Diana Sofia Hanafiah
Peronema Forestry Science Journal Vol 5, No 2 (2016): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

The rate of change in forest area into plantations tend to be greatly improved from year to year. As a result of forest land will be increasingly threatened its existence as it is converted to plantations. For that to know how the ratio of the absorption of CO2 by growers compared with forests. The purpose of this research were to know the carbon content in each section rubber tree (Hevea brasiliensis Muell. Arg.) and to determine the potential of carbon reserves in the rubber tree (Hevea brasiliensis Muell. Arg.) age of 10 years in people plantation Serdang Bedagai. The method of estimaty carbon stocks  had done destructive ends. Selection of plant samples carried out with purposive sampling. The best equation for estimating biomass and carbon selected using allometric equations based on the value of the highest R-Sq and practicality aspect. The results showed that allometric models for biomass and carbon wasW=3.42 DBH1.153 and  C = 0.58 DBH 1,586 respectively. The potential of biomass and carbon in smallholder rubber plantations Tarean Village, District Silindak, Serdang Bedagai were 40.54 tons / ha and 20.58 tons C/ ha ,respectively. Keywords: rubber, Carbon stocks, biomass, allometric models
PENDUGAAN CADANGAN KARBON PADA TANAMAN KARET (Hevea brasiliensis Muell. Arg.) DI PERKEBUNAN RAKYAT DESA TAREAN KECAMATAN SILINDAK, KABUPATEN SERDANG BEDAGAI Frans R Sipayung; Muhdi Muhdi; Diana Sofia Hanafiah
Peronema Forestry Science Journal Vol 5, No 2 (2016): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

Global warming is causing an increase in temperature of the earth's atmosphere, climate change, resulting in the dry season and rising temperatures. Efforts to control global warming is with the plant the absorption of carbon. One of which is rubber plant that has a high potential carbon reserve. The purpose of this research want to know the carbon content in each section rubber tree (Hevea brasiliensis Muell. Arg.) and determine the potential of carbon reserves in the rubber tree (Hevea brasiliensis Muell. Arg.) Age of 5 years in people plantation Serdang Bedagai. The method of estimaty carbon stocks done destructive and selection of plant samples carried out with purposive sampling. The carbon content in each section rubber trees (Hevea brasiliensis Muell. Arg.) 5 years of age is different is stem 50.37%, 40.58% branches and leaves 21.68%. The results showed that allometric models for biomass and carbon has W = 3.425 DBH1.153 and C = 0.582 DBH 1.586 , respectively. The potential of biomass and carbon in smallholder rubber plantations Tarean Village, District Silindak, Serdang Bedagai were 2.71 tons / ha and 1.18 tons C / ha, respectively. Keywords: Karet (Hevea brasiliensis Muell. Arg), carbon stocks, biomass measurement, allometric models.
PENDUGAAN CADANGAN KARBON TUMBUHAN BAWAH PADA KEMIRINGAN LAHAN YANG BERBEDA DI HUTAN PENDIDIKAN UNIVERSITAS SUMATERA UTARA KABUPATEN KARO Sartika EC Siallagan; Muhdi Muhdi; Diana Sofia Hanafiah
Peronema Forestry Science Journal Vol 5, No 3 (2016): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

The purpose of this study were to determine the potential of carbon on under storey level and to determine the effect of slope on a large or small carbon stocks in understorey in education forest University of North Sumatera District Karo. The research was conducted in April 2015. Data was collected by using purposive sampling with random start. Plot size is 20m x 20m as 6 plots with 3 plots in area ramps and 3 plots in steep terrain. Data were collected by destructive methods. The results showed that 14 species are found under the ramps region and 12 species on the steep region. Potential carbon found in the ramps region that is equal to       93,08 kg/ha and the potential of the carbon contained in the steep region that is equal to 83,84 kg/ha. The carbon in the ramps region is larger than in the steep region. Keywords: carbon, understorey, ramps region, steep region, education forest University of North Sumatera
PERTUMBUHAN DAN KANDUNGAN N,P,K BIBIT KELAPA SAWIT (Elaeis guineensis Jacq.) PADA MEDIA TANAM LIMBAH PABRIK KELAPA SAWIT DI MAIN NURSERY MEYLIN KRISTINA SARAGIH; Chairani Hanum; Diana Sofia Hanafiah
Jurnal Agroekoteknologi Vol 4, No 4 (2016)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (125.223 KB) | DOI: 10.32734/jaet.v4i4.13506

Abstract

Penelitian ini bertujuan untuk melihat pertumbuhan dan kandungan NPK bibit Kelapa Sawit ( Elaeis guineensis Jacq) dengan Media Tanam Limbah di Main Nursery. Penelitian ini menggunakan Rancangan Acak Kelompok ( RAK), dengan 2 faktor perlakuan, media tanam yang terdiri dari 5 komposisi Faktor I, M0 : Top Soil, M1 : Top Soil + Serat Kelapa Sawit, M2 : Top Soil + TKKS, M3 : Top Soil + Solid decanter, M4 : Top Soil +Serat Kelapa Sawit + TKKS + Solid decanter, faktor II adalah, Varietas yang terdiri dari 3 jenis yaitu: V1 : D x P 239, V2 : D x P Simalungun, V3: D x P Avros. Hasil penelitian ini menunjukan bahwa perlakuan komposisi media tanaman (Top Soil + Solid decanter + TKKS + Serat) 1:1:1:1, memberikan respon yang baik  terhadap tinggi tanaman, lingkar batang dan kandungan fosfor pada varietas DXP239.
Agronomic Improvement of Argomulyo Soybean Variety [Glycine max (l) merr] through Induced Mutation by Gamma Irradiation in M1 and M2 Generation Diana Sofia Hanafiah; Trikoesoemaningtyas Trikoesoemaningtyas; Sudirman Yahya; Desta Wirnas
Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal Vol 27, No 3 (2010)
Publisher : Fakultas Biologi | Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.mib.2010.27.3.199

Abstract

Gamma ray irradiation, especially applied at low doses, is one of methods to produce plant genetic diversity by means of micromutation. The objectives of this research was to determine the radiosensitivity of Argomulyo variety of soybeans (Glycine max (L) Merr) by gamma ray irradiation and to estimate genetic variablity of the crop after  irradiation. To determine the radiosensitivy, the seeds of Argomulyo variety were treated with gamma ray irradiation at  200 Gy, 400 Gy, 600 Gy, 800 Gy, and 1000 Gy. Curve-fit analysis was employed to find the Lethal Doses 50 (LD50) value . To evaluate the genetic variablity after irradiation with gamma ray, seeds of Argomulyo was irradiated under LD50  at doses of 0 Gy, 50 Gy, 100 Gy, 150 Gy, and 200 Gy.  The results showed that LD50 value was 457.17 Gy. The study found that for Argomulyo variety the LD20 was 490.93 Gy and the LD50 was 457.17 Gy.  Genetic variability was observed in various agronomic characters of M2 generation after low dose of gamma ray irradiation treatment of 50, 100, 150 and 200 Gy. The highest genetic variability was found at 200 Gy for plant height, number of productive nodes, and number of pods.  The variability of agronomic characters of soybean after irradiation was due to genetic factors. The highest heritability estimates was observed in plant height and number of productive pods. The succeding generation of putative mutants will be selected for productivity and drought tolerance.