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Johannes E. X. Rogi
Universitas Sam Ratulangi
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Economics, Econometrics & Finance Environmental Science Mathematics Physics Social Sciences

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KERAGAMAN BUAH PALA (Myristica fragrans Houtt) DI KABUPATEN KEPULAUAN SANGIHE DAN KABUPATEN SITARO ., Robert; Runtunuwu, S. D.; Rogi, J. E.X.; Pamandungan, Yefta
EUGENIA Vol 21, No 3 (2015)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.21.3.2015.9721

Abstract

ABSTRACT   This study aims to determine the nutmeg crop diversity is based on the character of the fruit, seeds, nutmeg mace in Sangihe Island Regency (Island of Sangihe) and District SITARO (Siau Island). The method used is the method of direct observation at the farmer's planting area nutmeg. Location research based on secondary data, namely the districts and villages producer of nutmeg, then determined the three observation points in each study site. Each observation point is determined 10 samples to be observed fruit trees, and every tree observed 20 fruit ready for harvest. Samples of plants is determined by: 1) Age of plants, which is about 15-30 years, and 2) The state of the plant, which is being fruitful and healthy tree. Observations carried out on: 1) The shape of fruit, 2) Color rind 3) Thick flesh, 4) Weight pieces, 5) The length of the fruit, 6) diameter pieces, 7) The color of the fruit flesh, 8) Weight seed fresh, 9) Lengh seed, 10) diameter seed, 11) weight  mace fresh, 12) Color mace. The results showed: 1) The shape of fruit and nutmeg seeds in Sangihe Islands Regency is more diverse than in the District Sitaro. 2) The highest weight of fresh nutmeg obtained from the location Talawid weighing 57.95 g fresh weight and r lowest nutmeg obtained from the location Karatung I is weighing 35.91 g fresh weight nutmeg while the highest was obtained from the location that is weighing 9.45 g Talawid and the lowest seed fresh weight was obtained from the location Karatung I are weighing 6.75g. 3) The same colors are red blood mace. Keywords: nutmeg plant, diversity of fruit, Sangihe, SITARO
KERAGAMAN BUAH PALA (Myristica fragrans Houtt) DI KABUPATEN KEPULAUAN SANGIHE DAN KABUPATEN SITARO ., Robert; Runtunuwu, S. D.; Rogi, J. E.X.; Pamandungan, Yefta
EUGENIA Vol 21, No 3 (2015)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.21.3.2015.9700

Abstract

ABSTRACT   This study aims to determine the nutmeg crop diversity is based on the character of the fruit, seeds, nutmeg mace in Sangihe Island Regency (Island of Sangihe) and District SITARO (Siau Island). The method used is the method of direct observation at the farmer's planting area nutmeg. Location research based on secondary data, namely the districts and villages producer of nutmeg, then determined the three observation points in each study site. Each observation point is determined 10 samples to be observed fruit trees, and every tree observed 20 fruit ready for harvest. Samples of plants is determined by: 1) Age of plants, which is about 15-30 years, and 2) The state of the plant, which is being fruitful and healthy tree. Observations carried out on: 1) The shape of fruit, 2) Color rind 3) Thick flesh, 4) Weight pieces, 5) The length of the fruit, 6) diameter pieces, 7) The color of the fruit flesh, 8) Weight seed fresh, 9) Lengh seed, 10) diameter seed, 11) weight  mace fresh, 12) Color mace. The results showed: 1) The shape of fruit and nutmeg seeds in Sangihe Islands Regency is more diverse than in the District Sitaro. 2) The highest weight of fresh nutmeg obtained from the location Talawid weighing 57.95 g fresh weight and r lowest nutmeg obtained from the location Karatung I is weighing 35.91 g fresh weight nutmeg while the highest was obtained from the location that is weighing 9.45 g Talawid and the lowest seed fresh weight was obtained from the location Karatung I are weighing 6.75g. 3) The same colors are red blood mace. Keywords: nutmeg plant, diversity of fruit, Sangihe, SITARO
IDENTIFIKASI VARIETAS KENTANG “SUPERJOHN” BERDASARKAN PENANDA RAPD (Random Amplified Polymorphic DNA) Runtunuwu, David S.; Rogi, J. E.X.; Palendeng, J. H.
EUGENIA Vol 17, No 1 (2011)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.17.1.2011.7140

Abstract

ABSTRACT Identification using morphological characters has time consuming. Currently, identification using molecular markers has now been popular due to rapid, saving time and more precisely. Superjohn potato variety has been cultivated in North Sulawesi. However, the Superjohn potato variety has not been characterized using molecular markers. This research was aiming to identify “Superjohn” potato based on RAPD (Random Amplified Polymorphic DNA) markers. The research was conducted in field and laboratory. Field research was performed by taking some young leaves from “Superjohn”, Granola, and Atlantic variety from the field. Identification using molecular marker was conducted at laboratory.  Nine RAPD primers were used to identify the superjohn variety. The nine primers were OPA-1, OPA-2, OPA-3, OPA-4, OPA-5, OPA-7, OPA-9,  OPA-10, and  OPO-1.  The molecular identification revealed that “Superjohn” variety was different with Granola and Atlantic. OPA-9700 primer could be used for identification  “Superjohn” variety while OPA-101000 primer was suitable  for identification  Granola variety. Keywords:  Potatoes, variety, “Superjohn”, Granola, Atlantic, and RAPD ABSTRAK Penelitian ini dilakukan untuk mengidentikasi kentang “Superjohn” berdasarkan penanda RAPD (Random Amplified Polymorphic DNA).  Penelitian dilakukan di lapangan dan laboratorium. Penelitian lapangan dilakukan dengan mengambil beberapa daun muda dari varietas kentang “Superjohn”, Atlantik dan Granola. Kemudian  analisis DNA dilakukan di laboratorium menggunakan analisis RAPD. Berdasarkan penanda RAPD ternyata kentang “Superjohn” berbeda dari kentang Granola dan kentang Atlantik. Penanda RAPD OPA-9700 dapat digunakan untuk mengidentifikasi kentang“Superjohn” dan penanda RAPD  OPA-101000 dapat digunakan  untuk mengidentifikasi kentang Granola. Kata kunci:  Kentang,  varietas, Superjohn, Granola, Granola, RAPD
KESESUAIAN LAHAN TANAMAN JAGUNG DI KABUPATEN MINAHASA SELATAN Rogi, J. E.X.; Rombang, Johan A.; Kalangi, Josephus I.; Taher, Malsupri
EUGENIA Vol 13, No 3 (2007)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.13.3.2007.7387

Abstract

ABSTRACT   Rogi, J.E.X. et. al. 2007. The Suistability Land for Corn in the South Minahasa District. Eugenia 13 (3) : 320-326. Based on agri-climate and market prospective, corn is a potential comodity in the South-Minahasa District. From 215.000 ha of South-Minahasa District area, it has 18.437 ha harvest-area and in 2006 produced 52.747 tonnes corn. The above data showed that this district has a possibility to extend the corn planting area in suitable area. To find this suistability area for corn, a spatial data was composed based on soil and climate data using Geographic Information Systemm (GIS). Soil data consisted of texture, pH, C-organic, and cation exchange capacity (CEC), whereas climate data consisted of rainfall and air temperature. Spatial data in the form of land suitability map for corn in the South-Minahasa District was analysed using ArcViewer 3.2. software.   Keywords: Harvest area, soil and climate, spatial data, GIS, ArcViewer 3.2
KERAGAMAN BUAH PALA (Myristica fragrans Houtt) DI KABUPATEN KEPULAUAN SANGIHE DAN KABUPATEN SITARO Robert, Robert; Runtunuwu, S. D.; Rogi, J. E.X.; Pamandungan, Yefta
EUGENIA Vol 21, No 3 (2015)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.21.3.2015.9727

Abstract

ABSTRACT   This study aims to determine the nutmeg crop diversity is based on the character of the fruit, seeds, nutmeg mace in Sangihe Island Regency (Island of Sangihe) and District SITARO (Siau Island). The method used is the method of direct observation at the farmer's planting area nutmeg. Location research based on secondary data, namely the districts and villages producer of nutmeg, then determined the three observation points in each study site. Each observation point is determined 10 samples to be observed fruit trees, and every tree observed 20 fruit ready for harvest. Samples of plants is determined by: 1) Age of plants, which is about 15-30 years, and 2) The state of the plant, which is being fruitful and healthy tree. Observations carried out on: 1) The shape of fruit, 2) Color rind 3) Thick flesh, 4) Weight pieces, 5) The length of the fruit, 6) diameter pieces, 7) The color of the fruit flesh, 8) Weight seed fresh, 9) Lengh seed, 10) diameter seed, 11) weight  mace fresh, 12) Color mace. The results showed: 1) The shape of fruit and nutmeg seeds in Sangihe Islands Regency is more diverse than in the District Sitaro. 2) The highest weight of fresh nutmeg obtained from the location Talawid weighing 57.95 g fresh weight and r lowest nutmeg obtained from the location Karatung I is weighing 35.91 g fresh weight nutmeg while the highest was obtained from the location that is weighing 9.45 g Talawid and the lowest seed fresh weight was obtained from the location Karatung I are weighing 6.75g. 3) The same colors are red blood mace. Keywords: nutmeg plant, diversity of fruit, Sangihe, SITARO
MODEL PERTUMBUHAN DAN PRODUKSI JAGUNG HIBRIDA PADA PERLAKUAN PEMBERIAN NITROGEN SERTA PEMANGKASAN TASSEL Paat, Frangky J.; Rogi, J. E.X.; Runtunuwu, David S.
EUGENIA Vol 16, No 3 (2010)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.16.3.2010.7139

Abstract

ABSTRACT This research was aimed to identify the growth and production model of hybrid maize in each treatments of nitrogen application and tassel trimming. This research was carried out in field experiment in Tountimomor Village of Kakas District in Minahasa Regency.  The result of this research showed that this model could stimulate the growth and production of maize with the total biomass of 8000 kg/ha. Optimum leaf nitrogen of 1.6 % at 49 day after cultivate. The highest leaf biomass from field measurement was reached in nitrogen fertilizing of 92 kg/ha. The highest tassel biomass from field measurement was obtained in treatment trimming which was 4 gr/ha. Keywords : Growth  Model, Production, Maize,  Nitrogen, Tassel Trimming ABSTRAK Penelitian ini bertujuan untuk mengidentifikasi pertumbuhan dan model produksi dari jagung hibrida dalam tiap-tiap perlakuan pemberian nitrogen dan pemangkasan tassel. Penelitian ini dilaksanakan di kebun percobaan di desa Tountimomor Kecamatan Kakas Kabupaten Minahasa. Hasil dari penelitian ini menunjukan bahwa model dapat menstimulasi pertumbuhan dan produksi jagung dengan jumlah biomassa 8000 kg/ha. Nitrogen daun optimum adalah 1,6% pada 49 hari setelah ditanam. Biomassa daun tertinggi didapat pada pemberian Nitrogen sebesar 92 kg/ha. Biomassa tassel tertinggi dari pengukuran lapangan didapat dalam perlakuan pemangkasa tassel sebanyak 4gr/ha. Kata kunci: Model pertumbuhan, Produksi, Jagung, Nitrogen, Pemangkasan Tassel.
IDENTIFIKASI VARIETAS KENTANG SUPERJOHN BERDASARKAN PENANDA RAPD (Random Amplified Polymorphic DNA) S., Runtunuwu D.; Rogi, J. E. X.; Palendeng, J. H.
EUGENIA Vol 17, No 1 (2011)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.17.1.2011.100

Abstract

Identification using morphological characters has time consuming. Currently, identification usingmolecular markers has now been popular due to rapid, saving time and more precisely. Superjohnpotato variety has been cultivated in North Sulawesi. However, the Superjohn potato variety has notbeen characterized using molecular markers. This research was aiming to identify ―Superjohn‖ potatobased on RAPD (Random Amplified Polymorphic DNA) markers. The research was conducted in fieldand laboratory. Field research was performed by taking some young leaves from ―Superjohn‖, Granola,and Atlantic variety from the field. Identification using molecular marker was conducted at laboratory.Nine RAPD primers were used to identify the superjohn variety. The nine primers were OPA-1, OPA-2,OPA-3, OPA-4, OPA-5, OPA-7, OPA-9, OPA-10, and OPO-1. The molecular identification revealedthat ―Superjohn‖ variety was different with Granola and Atlantic. OPA-9700 primer could be used foridentification ―Superjohn‖ variety while OPA-101000 primer was suitable for identification Granolavariety.Keywords: Potatoes, variety, “Superjohn”, Granola, Atlantic, and RAPD ABSTRAKPenelitian ini dilakukan untuk mengidentikasi kentang ―Superjohn‖ berdasarkan penanda RAPD(Random Amplified Polymorphic DNA). Penelitian dilakukan di lapangan dan laboratorium. Penelitianlapangan dilakukan dengan mengambil beberapa daun muda dari varietas kentang ―Superjohn‖,Atlantik dan Granola. Kemudian analisis DNA dilakukan di laboratorium menggunakan analisis RAPD.Berdasarkan penanda RAPD ternyata kentang ―Superjohn‖ berbeda dari kentang Granola dan kentangAtlantik. Penanda RAPD OPA-9700 dapat digunakan untuk mengidentifikasi kentang―Superjohn‖ danpenanda RAPD OPA-101000 dapat digunakan untuk mengidentifikasi kentang Granola.
WILAYAH SURPLUS DAN DEFISIT AIR DI SENTRA PRODUKSI PADI SULAWESI UTARA MENGGUNAKAN MODEL NERACA AIR Panelewen, J. H.; Rogi, J. E.X.; Rotinsulu, W.
EUGENIA Vol 18, No 3 (2012)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.18.3.2012.4100

Abstract

ABSTRACT   The research was conducted in the field and laboratory. Fieldwork in paddy rice production center was done to collect geographical coordinates while data analysis was conducted in the Laboratory of Ecosystem Modelling, Faculty of Agriculture, Sam Ratulangi University. Laboratory analysis was done to validate water balance model and to develop water surplus dan water shortage maps. This research was done during August 2012. Data collection included identification, inventory and data analysis. Then it continued with developing digital maps using Geographical Information Systems (GIS) for water balance model. Model inputs included climatic variables (rainfall, temperature, humidity, sunlight, and windspeed), ground water content and leaf area index. Parameter inputs included crop variety and location. Model simulation indicated that rainfall trend in North Sulawesi has increased especially in Januari, April dan November. Conversely, a decrease rainfall trend was ocurred in February and September. Spatial map showed that water surplus ocurred in Minahasa Selatan, Bolaang Mongondow, Bolang Mongondow Utara and Bolaang Mongondow Selatan. On the other hand, water shortage in North Sulawesi was experienced in October. Keywords : geographical information systems, water balance model   ABSTRAK   Penelitian ini dilakukan di lapangan dan laboratorium. Kerja lapangan di sentra produksi padi dilakukan untuk mengumpulkan data koordinat geografis sedangkan data analisis dilakukan di Laboratorium Model Ekosistem, Fakultas Pertanian, Universitas Sam Ratulangi. Analisis Laboratorium dilakukan untuk memvalidasi model neraca air dan untuk mengembangkan peta kelebihan dan kekurangan air. Penelitian ini dilakukan selama bulan Agustus 2012. Pengumpulan data meliputi identifikasi, inventarisasi dan analisis data. Kemudian dilanjutkan dengan mengembangkan peta digital dengan menggunakan Sistem Informasi Geografis (SIG) untuk model neraca air. Model input meliputi variabel iklim (curah hujan, suhu, kelembaban, sinar matahari, dan kecepatan angin), kadar air tanah dan indeks luas daun. Parameter input meliputi berbagai varietas tanaman dan lokasi. Model simulasi menunjukkan bahwa curah hujan tren di Sulawesi Utara telah meningkat terutama pada Januari, April dan November. Sebaliknya, penurunan curah hujan tren yang terjadi pada bulan Februari dan September. Spasial peta menunjukkan bahwa surplus air terjadi di Minahasa Selatan, Bolaang Mongondow, Bolang Mongondow Utara dan Bolaang Mongondow Selatan. Di sisi lain, kekurangan air di Sulawesi Utara dialami pada bulan Oktober. Kata kunci: sistem informasi geografis, model neraca air
PERTUMBUHAN DAN PRODUKSI DUA VARIETAS KENTANG (Solanum tuberosum L.) PADA DUA KETINGGIAN TEMPAT Mailangkay, Benjamin H.; Paulus, Jeanne M.; Rogi, Johannes E.X.
EUGENIA Vol 18, No 2 (2012)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.18.2.2012.3954

Abstract

ABSTRACT   This study aimed to examine the growth and production of potato crop varieties and varieties Granola Supejhon on two altitude, which is 750 m above sea level and 1200 m above sea level, studies using randomized block design with two factors. The first factor is the Granola variety and Supejhon. The second factor is the altitude, which is 750 m above sea level and 1200 m asl. The results of this study indicate that the rate Crop Growth Rate (LTT) and the Tuber Growth Rate (LTU) of Supejhon Granola varieties have a much higher altitude 1200 m asl (Modoinding) compared with altitude 750 m asl (Langowan). The altitude effect on the number of tubers / plant and production / plot, otherwise varieties had no effect on the number of tubers / plant, weight of tubers / plot and production / plot, and there is no interaction between variety and altitude. At altitude 750 m asl, both varieties yield an average production of tubers / plot of 1343.20 g (1.34 kg), whereas the altitude of 1200 m asl generate 7462.18 g (7.46 kg). Based on the average, the weight of tubers / plant and production / plots at very low reached by the two varieties of Granola and Supejhon well, so that the two varieties are not recommended to be cultivated at altitude 750 m above sea level. Further research is needed to examine other potato varieties that can be cultivated in areas with altitude of 750 m asl. Keywords: Potato, growth, production, level altitudes ABSTRAK Penelitian ini bertujuan untuk mengkaji pertumbuhan dan produksi tanaman kentang varietas Granola dan varietas Supejhon pada dua ketinggian tempat, yaitu 750 m dpl dan 1200 m dpl, penelitian  menggunakan Rancangan Acak Kelompok dengan dua faktor.  Faktor pertama adalah varietas  Granola dan Supejhon.  Faktor kedua adalah ketinggian tempat, yaitu 750 m dpl dan 1200 m dpl. Hasil penelitian ini menunjukkan bahwa Laju Tumbuh Tanaman (LTT) rata-rata dan Laju Tumbuh Umbi (LTU) rata-rata varietas Granola dan Supejhon memiliki nilai yang jauh lebih tinggi pada ketinggian tempat 1200 m dpl (Modoinding) dibandingkan dengan ketinggian tempat 750 m dpl (Langowan).  Ketinggian tempat berpengaruh terhadap jumlah umbi/tanaman dan produksi/petak, sebaliknya varietas tidak berpengaruh terhadap jumlah umbi/tanaman, bobot umbi/petak dan produksi/petak, serta tidak terdapat interaksi antara varietas dan ketinggian tempat. Pada ketinggian tempat 750 m dpl, kedua varietas menghasilkan rata-rata produksi umbi/petak sebesar 1343,20 g (1,34 kg), sedangkan pada ketinggian tempat 1200 m dpl menghasilkan 7462,18 g (7,46 kg).  Berdasarkan nilai rata-rata, bobot umbi/tanaman dan produksi/petak yang sangat rendah dicapai oleh kedua varietas baik Granola maupun Supejhon, sehingga kedua varietas tersebut tidak dianjurkan untuk dibudidayakan pada ketinggian 750 m dpl.  Perlu dilakukan penelitian lanjutan untuk menguji varietas kentang lainya yang dapat dibudidayakan pada daerah dengan ketinggian tempat 750 m dpl. Kata kunci: Kentang, pertumbuhan, produksi, ketinggian tempat
EFEKTIFITAS WAKTU PEMBERIAN DAN KONSENTRASI PACLOBUTRAZOL TERHADAP PERTUMBUHAN DAN HASIL KENTANG (SOLANUM TUBEROSUM L.) VARIETAS SUPEJOHN Rogi, Johannes E.X.; Sambeka, Frangki; Runtunuwu, Semuel D.
EUGENIA Vol 18, No 2 (2012)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.18.2.2012.3566

Abstract

ABSTRACT   The study aimed to examine the influence of time of application and concentration of paclobutrazol on growth and yield of potato crop Supejohn held in District Modoinding South Minahasa regency, from March to June 2012, using a randomized block design with two factors. The first factor is the concentration of Paclobutrazol with four standards are: 0 ppm, 75 ppm, 100 ppm, 125 ppm and the second factor is the provision of a three-level applications MST 4, 5 and 6 MST MST (Week After Planting). Based on research, the results of analysis of variance showed an interaction between application timing and concentration of paclobutrazol. Combination treatment with 125 ppm paclobutrazol 6 WAP application time can give significant effect on plant height, number of chlorophyll content, percentage weight class tuber yield components in the form of increased crop production amounted to 45.04 kg / plot (24 plants) / range 52. ton / ha by pressing the vegetative growth of plants. Key words : Supejohn, time application, concentration, paclobutrazol
Co-Authors A. LUMINGKEWAS Aan A. Daradjat Antoneta Kartini Kotangon Augus Y. M. Sumajow Augus Y. M. Sumajow, Augus Y. M. Benjamin H. Mailangkay Bertje R. A. Sumayku Bonaventura R. Lienargo Budi Utomo Mondolu Charissa Maria Simbawa Chintya Gita Sartika Modeong D. Murdiyarso Daniel P. M. Ludong David P. Rumambi David S. Runtunuwu Diane Tiwow Dianita Rogi Farida Fattah, Farida Frangki Sambeka Frangky J. Paat Franly J.I. Lamia Greydi F. H. Punusingon Handoko Handoko Hanny S. G. Kembuan Indry E, Karundeng J. H. Palendeng J. H. Panelewen J. I. KALANGI J. Tatuh Jantje ., Pongoh Jeanne . Paulus Jeanne M. Paulus Jeanne Martje Paulus Jelie Viekson Porong JOHAN A. ROMBANG Josephus I. Kalangi Kaeng, Silvana E. Kotangon, Antoneta Kartini Langimanapa S. Demmassabu Malsupri Taher Mariam M. Toding, Mariam M. Marjam Toding Marjam Toding, Marjam Master R.L. Sirait Meity R. Rantung Olivia Komansilan Pemmy Tumewu Peter Rene Hosang Pongoh, Jantje ., Rifaine M.N. Erungan Rifaine M.N. Erungan, Rifaine M.N. Robert . Robert Robert Runtunuwu D. S. S. D. Runtunuwu S. David Runtunuwu S. TUMBELAKA Sakti Karokaro Sakti Karokaro, Sakti Samuel D. Runtunuwu Selvie . Tumbelaka Selvie . Tumbelaka, Selvie . Selvie G. Tumbelaka Semuel D. Runtunuwu Semuel D. Runtunuwu Semuel Runtunuwu Silvana E. Kaeng Siska J. Frans Sitti Wakiah Sofia Wantasen W. Rotinsulu Wakiah, Sitti Yefta Pamandungan Yefta Pamandungan Yitenus Tabuni Yorri Y. J. Sanger YULIA PASKALINA Yunnita Rahim