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All Journal Jurnal Hortikultura Indonesia (JHI) Agromet JURNAL PESISIR DAN LAUT TROPIS Jurnal MIPA EUGENIA Buletin Palma Jurnal Agroekoteknologi Terapan AGRI-SOSIOEKONOMI COCOS
Johannes E. X. Rogi
Universitas Sam Ratulangi
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Earth & Planetary Sciences Economics, Econometrics & Finance Environmental Science Mathematics Physics Social Sciences

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PENDUGAAN POTENSI PRODUKSI GANDUM (TRITICUM AESTIVUM L.) DI SULAWESI UTARA DENGAN MENGGUNAKAN PERANGKAT LUNAK SHIERARY WHEAT VERSI 2.0 Rogi, Johannes E. X.; Frans, Siska J.
EUGENIA Vol 17, No 1 (2011)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.17.1.2011.101

Abstract

The demand of wheat increases yearly in Indonesia. Therefore, Indonesia has imported wheat fromoverseas. Agronomically, wheat could be cultivated in Indonesia. Simulation model using ShieraryWheat ver 2.2 software developed by Handoko (1992) will be used in this studi. This software has beenvalidated by Rogi (1996) in several areas in Indonesia. This model has daily resolution which explainsinteraction between growth and development of wheat. Model inputs include weather elements such asradiation, temperature, humidity, wind and rainfall. Soil physical field capacity (water condition in thesoil), characteristic such as field capacity, wilt permanent point, and evaporation together with pH, totalnitrogen were incorporated in the model. Agronomical inputs such as irrigation, nitrogenous fertilizer,ground water and total nitrogen were used as hypothetical data. The research was aiming to assessthe best location and time for cultivated wheat ini North Sulawesi. The result showed that planted timein August had potential high yield followed by January, March, April, May, and Septemnber respectively.The suitable lacations for cultivated wheat in North Sulawesi were Tondano, Langowan, Tompaso,Tompaso Baru, and Kotamobagu. The best potential high yield was found in areas which had optimal ofair temperature and rainfall.Keywords : Wheat, Agronomically, Simulation model, Shierary Wheat Ver 2.0 ABSTRAKKebutuhan gandum yang terus meningkat setiap tahun di Indonesia dipenuhi dengan cara mengimpor,padahal secara agronomis gandum saat ini dapat dibudidayakan di daerah tropis dengan produksi yanglebih tinggi dan waktu panen yang lebih pendek. Penentuan daerah-daerah pengembangan Gandum diIndonesia seperti di Provinsi Sulawesi Utara penting untuk dilakukan dengan menggunakan modelsimulasi. Perangkat lunak Shierary Wheat Ver 2.0 yang dikembangkan Handoko tahun 1992 diMelbourne Australia dan divalidasi oleh Rogi (1996) dan telah dikalibrasi pada berbagai tempat diIndonesia. Model ini mempunyai resolusi harian yang menjelaskan proses interaksi antaraperkembangan dan pertumbuhan tanaman gandum. Input model terdiri dari unsur-unsur cuaca beruparadiasi matahari, suhu udara, kelembaban udara, kecepatan angin, dan curah hujan, sedangkan sifatfisik tanah (kapasitas lapang, titik layu permanen dan parameter evaporasi), serta sifat kimia tanah (pH,nitrogen total). Input agronomis berupa irigasi, pupuk nitrogen, kondisi awal berupa kadar air tanah dannitrogen total menggunakan data asumsi. Sehingga penelitian ini bertujuan untuk mendapatkan waktudan lokasi tanam yang terbaik untuk Tanam Gandum di Sulawesi Utara. Hasil penelitian mendapatkanbahwa Waktu tanam 1 Agustus mempunyai potensi hasil paling baik kemudian berturut-turut Januari,Maret, April, Mei dan September dengan lokasi yang sesuai adalah Tondano, Langowan, Tompaso,Tompaso Baru, dan Kotamobagu.
ANALISIS DAMPAK PERUBAHAN IKLIM TERHADAP PRODUKSI BERAS PROVINSI SULAWESI UTARA TAHUN 2013 – 2030 Hosang, Peter Rene; Tatuh, J.; Rogi, Johannes E.X.
EUGENIA Vol 18, No 3 (2012)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.18.3.2012.4101

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ABSTRACT   Climate change has caused in the decreasing of rice production worldwide which affects food security condition in North Sulawesi. Therefore, efforts need to be done to anticipate this issue. A combination of numerical and spatial models was chosen in this study. Paddy rice numerical simulation model described relationships between crops’ physical environmental conditions and physiological condition in the forms of mathematical equations. Model inputs included climatic components, such as: light, temperature, humidity, wind speed and rainfall; soil physical components including: soil capacity, permanent wilt point, soil evaporation parameter; soil chemical variables including: pH and total nitrogen; agronomical input including: crop varieties, seed growth rate, irigation and nitrogen fertilizer; initial conditions including: ground water concentration, mineral nitrogen (NH4 and NO3) from various soil layers. Model output can be determined based on the purpose of the study. This research concluded that (a) rainfall pattern change and temperature’s increase affected paddy rice production, (b) 141,677 ton of rice shortage will be occurred in 2030. Strategics to anticipate this condition should be formulated. It is recommended to conduct a further research on compiling climate change data in North Sulawesi. Also, it is crucial to produce best paddy rice varietas resistant of climate change through biotechnology. Keywords : climate change, produce   ABSTRAK   Perubahan iklim mengakibatkan terjadi gangguan dalam produksi tanaman padi yang mempengaruhi kondisi ketahanan pangan di Sulawesi Utara sehingga perlu adanya langkah-langkah mengantisipasinya. Metode penelitian dilakukan dengan menggunakan pendekatan yang mengintegrasikan model numerik dan spasial. Model numerik simulasi tanaman padi menjelaskan hubungan antara kondisi fisik lingkungan dengan kondisi fisiologis tanaman dalam bentuk persamaan-persamaan matematis.  Input model terdiri dari unsur-unsur cuaca berupa radiasi surya, suhu dan kelembaban udara, kecepatan angin dan curah hujan; sifat fisik tanah (kapasitas lapang, titik layu permanen dan parameter evaporasi tanah); sifat kimia tanah (pH, nitrogen total); input agronomis (varietas, laju penggunaan benih, irigasi, pemupukan nitrogen); serta kondisi awal berupa kadar air tanah dan nitrogen mineral (NH4 dan NO3) dari berbagai lapisan tanah.  Sedangkan untuk output dapat disesuai dengan tujuannya. Penelitian ini dapat disimpulkan bahwa (a) perubahan pola curah hujan dan kenaikan suhu udara mempengaruhi produksi tanaman padi, (b) prognosa ketersediaan beras pada tahun 2030 mengalami defisit sebesar 141,677 ton, sehingga diperlukan langkah strategi untuk mengantisipasi. Eugenia Volume 18 No. 3  Desember 2012 Kata kunci : perubahan iklim, produksi
PENENTUAN WAKTU TANAM PADI SAWAH DI KABUPATEN SANGIHE DENGAN MENGGUNAKAN MODEL SIMULASI SHIERARY RICE Fattah, Farida; Rogi, J. E.X.; Toding, Mariam M.
EUGENIA Vol 21, No 3 (2015)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.21.3.2015.9696

Abstract

ABSTRACT   Decline in rice production in Sangihe Island partly due to climate change and the implementation of a less precise planting time. Rice Shierary  model was used to predict the timing of planting paddy and has advantages in time and cost savings. This study aims to determine the exact time of planting in paddy rice crops in the district of South Manganitu, North Tabukan and Tamako, as well as to determine whether the results of the simulation model Shierary Rice together with the results obtained from the Central Bureau of Statistic Sangihe Islands. Input model consists of solar radiation, rainfall, temperature and humidity, field capacity, permanent wilting point, varieties, irrigation, nitrogen fertilization, longitude and latitude of the study area. While the output was paddy rice yield potential. It can be concluded that (a) the appropriate planting time of paddy in the South Manganitu namely in June with a potential yield of 4.25 tonha-1 and March with a potential yield of 3.88 tonha-1. (b) the appropriate planting time of paddy in the  North Tabukan namely in June with a potential yield of 4.27 tonha-1 and March with a potential yield of 3.62 tonha-1. (c) the appropriate planting time of paddy in Tamako ie in March with a potential yield of 3.58 tonha-1 and February with a potential yield of 3.28 tonha-1. (d) the yield of rice field paddy with the determination of planting time by using the model of Shierary Rice nearing/line with productivity results which obtained by the Central Statistics Agency (BPS) Sangihe Islands. Keywords: planting, paddy, simulation models, Shierary Rice
Laju Tumbuh Umbi Tanaman Kentang Varietas Granola dan Supejohn di Dataran Medium dengan Pemulsaan Johannes E. X. Rogi; Hanny S. G. Kembuan; Johan A. Rombang
Jurnal Hortikultura Indonesia Vol. 7 No. 2 (2016): Jurnal Hortikultura Indonesia
Publisher : Indonesian Society for Horticulture / Department of Agronomy and Horticulture

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (325.07 KB) | DOI: 10.29244/jhi.7.2.83-90

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ABSTRACTResearch on growth rate of two cultivars of potato c.v. Granola and Supejohn at medium altitude using mulching methods was conducted at Paslaten village, Subdistrict of West Langowan, District of Minahasa, North Sulawesi. Research location was at medium altitude of 750 m above sea level. The objectives of this research were to determine growth rate of potato tuber grown at medium altitude and the most suitable mulch. The research was arranged in a randomized complete block design with two treatments and three replications. The first factor was potato cultivars (Granola and Supejohn) and second factor was mulching methods (no mulch, straw mulch and black silver plastic). Research result showed that straw mulch treatment increased growth rate of Granola and Supejohn cultivars 0.87 g plant-1 day-1 and 0.73 g plant-1 day-1, respectively while black silver plastic treatment only increased the growth rate of Granola and Supejohn cultivars 0.70 g plant-1 day-1and 0.59 g plant-1 day-1, respectively. The highest tuber dry weight was achieved by straw mulch. The best treatment was Granola grown in straw mulch. The lowest growth rate occurred at the mulch treatment which were 0.49 g plant-1 day-1 for Granola cultivar and 0.47 g plant-1 day-1 for Supejohn cultivar.Keywords: black silver plastic mulch, dry weight, growth rate, potato, straw mulch    ABSTRAKPenelitian tentang laju tumbuh tanaman kentang dengan 2 (dua) varietas yaitu Granola dan Supejohn di dataran medium dengan menggunakan mulsa dilakukan di Desa Paslaten, Kecamatan Langowan Barat, Kabupaten Minahasa Provinsi Sulawesi Utara. Lokasi penelitian berada di dataran medium dengan elevasi 750 m di atas permukaan laut. Penelitian bertujuan untuk mendapatkan besarnya laju tumbuh umbi tanaman kentang yang dikembangkan di dataran medium dan jenis mulsa yang paling sesuai. Penelitian menggunakan rancangan acak kelompok dengan 2 (dua) faktor dan 3 (tiga) ulangan yaitu faktor I tanaman kentang (varietas Granola dan Supejohn) dan faktor II yaitu perlakuan mulsa (tanpa mulsa, mulsa jerami dan mulsa plastik hitam perak). Hasil penelitian menunjukkan bahwa perlakuan mulsa jerami meningkatkan laju tumbuh umbi pada varietas Granola sebesar 0.87 g tanaman-1 hari-1 dan varietas Supejohn sebesar 0.73 g tanaman-1 hari-1. Perlakuan mulsa plastik hitam perak meningkatkan laju tumbuh umbi pada varietas Granola sebesar 0.70 g tanaman-1 hari-1 dan varietas Supejohn 0.59 g tanaman-1 hari-1. Bobot kering umbi tertinggi dicapai oleh mulsa jerami. Perlakuan terbaik ialah varietas Granola yang diberi mulsa jerami. Laju pertumbuhan terendah terdapat pada perlakuan tanpa mulsa sebesar 0.49 g-1 hari-1 untuk kultivar Granola dan 0.47 g-1 hari-1 untuk Supejohn.Kata kunci: bobot kering, kentang, laju tumbuh, mulsa jerami, mulsa plastik hitam perak
PENGUJIAN DAN PENERAPAN MODEL SIMULASI PERTUMBUHAN DAN PERKEMBANGAN TANAMAN GANDUM (Triticum aestivum L.) BERDASARKAN INTERAKSI AIR DAN NITROGENVALIDATION AND APPLICATION OF THE GROWTH AND DEVELOPMENT SIMULATION MODEL OF WHEAT ... Johannes E. X. Rogi; I. Handoko; D. Murdiyarso; Aan A. Daradjat
Agromet Vol. 13 No. 1 (1998): JUNE 1998
Publisher : PERHIMPI (Indonesian Association of Agricultural Meteorology)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (11956.217 KB) | DOI: 10.29244/j.agromet.13.1.25-40

Abstract

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Produktivitas Jagung (Zea mays L.) pada Berbagai Tingkat Naungan Tanaman Kelapa (Cocos nucifera L.) JOHANNES E.X. ROGI; J. I. KALANGI; JOHAN A. ROMBANG; A. LUMINGKEWAS; S. TUMBELAKA; YULIA PASKALINA
Buletin Palma No 38 (2010): Juni, 2010
Publisher : Pusat Penelitian dan Pengembangan Perkebunan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/bp.v11n38.2010.49-59

Abstract

Productivity of Corn (Zea mays L.) at Various Levels of Shading inCoconut Field (Cocos nucifera L.)Coconut cultivation in monoculture had problems in field production, processing and marketing that can cause low coconut farmers income. Therefore we need coconut farm diversification by increasing the potential of land among the coconut trees. Area of land that used coconut palm is only about 20% so that the remaining land that can be used for other commodities is 80%. One of the plants can be cultivated among the coconut is corn. Land use among the coconut palm is expected to increase corn production because corn is one of the leading food commodities and the potential in Indonesia. The objective of this study to determine the productivity of corn plants at different levels of shade by coconut palm. The research was conducted at the experimental Garden Kima Atas, Indonesia Coconut and Other Palm Research Institute (ICOPRI), North Sulawesi. This research was conducted from June to November 2007. The results showed that an increase in production of plant dry weight in treatment D (corn planted in open areas) is higher than treatment A (corn grown in between coconut palm old), B (corn grown inbetween coconut palm 20 years old) and C (corn grown in between coconut palm 50 years old).
Pemberian Plant Growth Promoting Rhizobacteria (PGPR) Untuk Meningkatkan Produksi Padi Gogo Dan Jagung Dalam Sistem Tumpang Sari Olivia Komansilan; Jeanne Martje Paulus; Johannes E.X Rogi
Jurnal MIPA Vol. 12 No. 1 (2023)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/jm.v12i1.43186

Abstract

Pemanfaatan PGPR pada sistem tanam tumpang sari padi gogo dan jagung diharapkan mampu membantu tanaman menyerap usnsur hara dengan lebih efisien sehingga upaya peningkatan produksi  tanaman  yang lebih  ramah lingkungan  dapat tercapai. Penelitian bertujuan mengkaji pengaruh pemberian PGPR bagi peningkatan produksi padi gogo dan jagung pada system tumpangsari serta mengetahui nilai kesetaraan lahan pada sistem tumpangsari padi gogo dan jagung setelah diberikan aplikasi PGPR dengan konsentrasi yang berbeda yaitu K1= 5 ml/liter, K2 = 10 ml/liter dan K3 = 15 ml/liter. Penelitian ini menggunakan Rancangan Acak Kelompok dengan 9 kombinasi perlakuan dan diulang sebanyak 3 kali sehingga didapatkan 27 petak percobaan. Bahan yang digunakan pada penelitian ini adalah benih padi gogo, jagung hibrida, dan PGPR. Alat yang digunakan mencakup cultivator, cangkul, sabit, meteran, jangka sorong, hand sprayer, tali dan alat pendukung lainnya. Hasil penelitian ini mendapatkan bahwa perlakuan PGPR dengan konsentrasi 5 ml/liter, 10 ml/liter, 15 ml/liter pada tanaman padi gogo hanya berpengaruh nyata pada jumlah anakan produktif pada sistem tumpangsari namun tidak berbeda nyata pada variable yang lain pada tanaman padi gogo maupun jagung. Hasil terbaik terlihat pada pemberian konsentrasi PGPR 15 ml/liter. Nilai kesetaraan lahan didapati bahwa pada perlakuan PGPR konsentrasi 5 ml/liter NKL : 1,26, konsentrasi 10 ml/liter NKL: 1,16, sedangkan konsentrasi 15 ml/liter NKL : 1,21.
RESPON EVAPOTRANSPIRASI TANAMAN PADI (Oryza Sativa L.) VARIETAS PERMATA DAN SERAYU TERHADAP VARIASI KETEBALAN TANAH MENGGUNAKAN METODE SYSTEM OF RICE INTENSIFICATION (SRI) DI DESA RASI, KABUPATEN MINAHASA TENGGARA Greydi F. H. Punusingon; Daniel P. M. Ludong; Johannes E. X. Rogi
EUGENIA Vol. 27 No. 1 (2021)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.27.1.2021.43258

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The purpose of this study was to calculate the amount of water required during the growth phases of the rice var. Permata and Serayu with soil layer thickness of 25 cm and 35 cm.This research was conducted in September - December 2019 in Rasi Village, Ratahan District, Southeast Minahasa Regency. The research was carried out experimentally and the observed data in the field were analyzed descriptively. This study consisted of two treatment factors, i.e. variety (Serayu and Permata) and the thickness of the cultivated soil (25 and 35 cm). The rice plants were planted in and in theiron boxes (60 X 60 cm) in the paddy fields. The total Evapotranspiration or water requirement for rice planted the iron boxeswere188 and 254 L, respectively, for soil depth of 25 and 35 cm in Serayu. For the Permata variety with a soil depth of 25 and 35 cm, the water requirement were175 and 231L, respectively.
PENDUGAAN DEFISIT DAN SURPLUS AIR UNTUK PENGEMBANGAN TANAMAN JAGUNG (ZEA MAYS L.) DI KABUPATEN GORONTALO DENGAN MENGGUNAKAN MODEL SIMULASI NERACA AIR Yunnita Rahim; Johannes E. X. Rogi; Samuel D. Runtunuwu
AGRI-SOSIOEKONOMI Vol. 11 No. 1 (2015)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (301.402 KB) | DOI: 10.35791/agrsosek.11.1.2015.7166

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This study aims to apply the water balance simulation model developed by Handoko (1992) for estimating the deficit and surp4lus water for the development of corn plants in the province of Gorontalo. This study was implemented from April to August 2014 in the District of Gorontalo. The study metods included field studies and modeling of water balance using a simulation model by Handoko (1992). The results showed that the period of water deficit was found in August and September where rainfall (Ch) is smaller than potential evapotranspiration (ETP) whereas periods of surplus water in the district of Gorontalo found in January to July and October to December where rainfall (Ch) exceeds potential evepotranspiration (ETP).
PENGARUH PEMANGKASAN DAUN BAGIAN BAWAH TERHADAP PRODUKSI JAGUNG MANIS (Zea mays var. saccharata Sturt) Augus Y. M. Sumajow; Johannes E. X. Rogi; Selvie . Tumbelaka
AGRI-SOSIOEKONOMI Vol. 12 No. 1A (2016)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (226.128 KB) | DOI: 10.35791/agrsosek.12.1A.2016.11537

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The purpose of this study was to determine the effect of trimming the bottom leaves to the increased production of sweet corn crop. This research was arranged in a completely randomized design (CRD) with 4 treatments and repeated 5 times. Pruning is done at the age of 50 days after planting. The results obtained from this study are pruning significant effect on the rising corncob where the highest rates in the third pruning leaves the bottom (P3) weighing 333.04 g. In the variable length cob, cut 3 pieces (P3) gives the most high, 21.25 cm while trimming treatment 1 piece (P1) and a second piece (P2) shows the results are not significantly different from each other but significantly different from that of the untreated (P0) , While on the cob entire circumference of the variable level of treatment (P1, P2, P3) results are not significantly different from each other but all three significantly different from that of the untreated (P0) ddengan highest yield is in P3 which is 17.27 cm. from these results it can be concluded that treatment of the bottom leaf pruning can increase the production of sweet corn.
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 Daniel Murdiyarso Daniel P. M. Ludong David P. Rumambi David S. Runtunuwu Deiske A. Sumilat Diane J. Kusen Diane Tiwow Dianita Rogi Edy F. Lengkong Farida Fattah, Farida Frangki Sambeka Frangky J. Paat Franly J.I. Lamia Gabai, Maria Galensong, Justio P.D. Greydi F. H. Punusingon Handoko Handoko Hanny S. G. Kembuan Indri S. Manembu Indry E, Karundeng Inkiriwang, Annatje E.B. 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. Khoirul Insan Kotangon, Antoneta Kartini Lamia, Franly J.I. Langimanapa S. Demmassabu Malsupri Taher Mariam M. Toding, Mariam M. Marjam Toding Marjam Toding, Marjam Master R.L. Sirait Meity R. Rantung Olivia Komansilan Paulus, James Pemmy Tumewu Peter Rene Hosang Pongoh, Jantje ., Rifaine M.N. Erungan Rifaine M.N. Erungan, Rifaine M.N. Rignolda Djamaluddin Robert . Robert Robert Rogi, Dianita Runtunuwu D. S. Runtunuwu, Semuel 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 Stanley A.F. Walingkas Sumayku, Bertje R.A. Tiwow, Diane Tulungen, Antje Grace W. Rotinsulu Wakiah, Sitti Wenny Tilaar Wilhelmina Patty Yefta Pamandungan Yefta Pamandungan Yitenus Tabuni Yorri Y. J. Sanger YULIA PASKALINA Yunnita Rahim