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Tumpal HS Siregar, Tumpal HS
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Agriculture, Biological Sciences & Forestry Education

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IDENTIFIKASI DAN UJI METABOLIT SEKUNDER BANGUN-BANGUN (COLEUS AMBOINICUS) TERHADAP PENYAKIT JAMUR AKAR PUTIH (RIGIDOPORUS MICROPORUS) DI LABORATORIUM Dalimunthe, Cici Indriani; Sembiring, Yan Riska Venata; Andriyanto, Mochlisin; Siregar, Tumpal HS; Darwis, Hilda Syafitri; Barus, Diana Alemin
Jurnal Penelitian Karet JPK : Volume 34, Nomor 2, Tahun 2016
Publisher : Pusat Penelitian Karet - PT. Riset Perkebunan Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/ppk.jpk.v34i2.295

Abstract

Penyakit Jamur Akar Putih (JAP) termasuk penyakit berbahaya ditinjau dari akibat yang ditimbulkannya dan dapat menyebabkan kerugian finansial yang dihitung secara nasional mencapai IDR 300 miliar setiap tahunnya. Pengendalian penyakit dengan memanfaatkan ekstrak bangun-bangun yang berpotensi sebagai antimikroba belum banyak diterapkan di perkebunan karet. Tujuan penelitian ini adalah untuk mengidentifikasi metabolit sekunder bangun-bangun dan mengetahui persentase penghambatan metabolit sekunder bangun-bangun terhadap penyakit JAP skala laboratorium. Penelitian menggunakan Rancangan Acak Lengkap (RAL) faktorial dengan 2 fakor dan 3 ulangan. Faktor yang digunakan adalah dosis dan pelarut (aseton, n-heksana dan metanol). Komponen yang dianalisis adalah akar dan daun bangun-bangun untuk mengetahui metabolit sekunder yang dihasilkan bangun-bangun melalui identifikasi fitokimia kemudian diekstraksi dengan berbagai pelarut untuk diuji terhadap Jamur Akar Putih (Rigidoporus microporus). Parameter yang diamati yaitu luas pertumbuhan jamur dan persentase penghambatan JAP. Hasil identifikasi fitokimia menunjukkan bahwa akar dan daun bangun-bangun mengandung senyawa flavonoida, glikosida dan saponin. Senyawa ini tergolong dalam kategori senyawa polar dan semipolar sehingga akan mudah diekstraksi dengan menggunakan pelarut polar (aseton). Uji pendahuluan ekstraksi akar dengan berbagai macam pelarut dan dosis menunjukkan interaksi yang berpengaruh nyata. Persentase penghambatan tertinggi terdapat pada ekstrak akar dengan menggunakan pelarut aseton sebesar 98,46% pada dosis 10%. Uji lanjutan hasil fraksinasi dengan menggunakan kertas cakram menunjukkan daya hambat terkuat terdapat pada fraksi n-heksana (14-18,5 cm), fraksi etil asetat (13,5-15,5 cm), dan ekstrak etanol (7-10,5 cm).
ANALISIS STRATEGI BISNIS UNIT / DISTRIK SERDANG PT. PERKEBUNAN NUSANTARA III MEDAN Johan, T.Syahmi; Siregar, Tumpal HS; Hafiz, Faoza
JURNAL AGRICA Vol 5, No 2 (2012): JURNAL AGRICA
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (943.339 KB) | DOI: 10.31289/agrica.v5i2.1309

Abstract

             The strategy is an action that is incremental (constantly increasing) and continuously, and is based on the customer expected in the future. The speed of innovation of new markets and changing patterns of consumer requires core competencies. This research was conducted at PT. PTPN III Serdang District II (DSER 2), with the objectives of : (1) to analyze the strengths, weaknesses, threats and opportunities the business units of  PTPN III, (2) to identify the business strategies implemented by each business unit/district in PTPN III, as one of the incremental actions and continous for the customers expectations towards the products.The results showed that: (1) based on internal factor analysis, the strengths and the weaknesses of the business unit District of Serdang II are the high sales value, healthy financial condition, organizational structure, educational background, soil fertility and plant age composition.While the weakness of the business unit are the age composition of employees, competitive HPP and activity based costing, (2) the opportunities and threats in the business unit Serdang District II are the development of downstream industries, foreign currency appreciation, global cultural phenomenon, waste utilization and increased market share. While the threat of the business unit are the environment business security, economics and the global financial crisis, the competitor technology development, product availability substitution, selling price volatility changes and consumer demand, (3) the business unit Serdang District II has the strengths to increase the productivity through the optimization aspects of culture and technology plants, improving coordination and synergy with related parties in the cost efficiency of every business activity and encourage the improvement of the quality and competence of the Human Resources (HR), (4) the  business strategy that can be done by business unit Serdang District II are the aggressive strategy intensive, vertical integration and strategy diversifrkasi. By the three alternative strategies that have been, the intensive strategy is the main option to be implemented, the integration strategy and diversification strategy.  Keywords : strategy, incremental, continuous and customer orientation             
Analisis Pemasaran Kelapa di Kecamatan Tanjung Tiram Kabupaten Batubara Eldiyus, Rahmadani; Siregar, Tumpal HS; Lubis, Syaifuddin
JURNAL AGRICA Vol 6, No 2 (2013): JURNAL AGRICA
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (586.243 KB) | DOI: 10.31289/agrica.v6i2.1338

Abstract

Tanjung Tiram District is the central areas and the potential for development of coconut commodities because of the natural conditions. The purpose of the study was to determine the coconut marketing channel system, to know the marketing margin on each marketing channel and to determine the level of coconut marketing efficiency. This research is quantitative descriptive by survey method. The research instruments used the interviews and questionnaires. The respondents in the sample used by 80 coconut farmers at Tanjung Tiram District of Batubara Regency. The result of study shows that the most small marketing margin at channel 3 (coconut farmer - retailer - consumer) of Rp. 700/piece of coconut, while the most of marketing margin at channel 2 (coconut farmer - wholesaler - consumer) and channel 5 (coconut farmer - trader - merchants of the city - town factory or retailer - consumer). The conclusion of this study is there are 5 types of coconut marketing channels at Tanjung Tiram District. In terms of the coconut marketing margin that channel 3 most efficient compared  to channel 1, 2, 4 and 5. The farmers choose the channel 1, channel 2, channel 4 and channel 5 even buy coconut at a price lower than the channels 3 because of the four marketing channels to absorb any coconut production whenever farmers at harvest time. Keyword : coconut, traders, marketing  
Strategi Pengembangan Komoditi Karet di Kabupeten Tapanuli Selatan Nurhafifah, Nurhafifah; Siregar, Edi Batara Mulya; Siregar, Tumpal HS
JURNAL AGRICA Vol 4, No 2 (2011): JURNAL AGRICA
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1035.321 KB) | DOI: 10.31289/agrica.v4i2.1312

Abstract

The rubber is one of the plantation commodity which is the source of livelihood for 1.6 million peasant families, as well as the second largest source of foreign exchange after palm oil and also employers as well as suppliers of various raw materials in the domestic rubber industry. As a commodity plantation, in the development, are required to contribute to optimal results both for the welfare of the community and the sustainability of its business . The objectives of this study  are: to determine the external and internal strategic factors that influence the development of smallholder rubber agribusiness in South Tapanuli, to determining the strategic formulation of smallholder rubber development of agribusiness in South Tapanuli, and construct the strategic priority to develop agribusiness in smallholder rubber South Tapanuli .From the analysis, can be conclusions that: there were 13 external strategic factors and 10 internal strategic factors affecting the development of smallholder rubber agribusiness in South Tapanuli. The results of analysis by the SWOT matrix and QSPM analysis can be recommended six priority smallholder rubber agribusiness development strategy and medium term and six long-term strategic priorities to be diimplemerrtasikan by policy makers to agribusiness development of smallholder rubber in South Tapanuli . Keywords : rubber, SWOT and QSPM, agribusiness
Co-Authors Cici Indriani Dalimunthe Diana Alemin Barus, Diana Alemin Edi Batara Mulya Siregar Eldiyus, Rahmadani Hafiz, Faoza Hilda Syafitri Darwis, Hilda Syafitri Johan, T.Syahmi Lubis, Syaifuddin Mochlisin Andriyanto, Mochlisin Nurhafifah, Nurhafifah Yan Riska Venata Sembiring, Yan Riska Venata