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All Journal Bumi Lestari Voteteknika (Vocational Teknik Elektronika dan Informatika) Berkala Perikanan Terubuk Jurnal Ilmu Lingkungan Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Jurnal Mirai Management JPF (Jurnal Pendidikan Fisika) Universitas Islam Negeri Alauddin Makassar Jurnal Teknologi Informasi dan Pendidikan Jurnal Magrobis Jurnal Zona Maeswara: Jurnal Riset Ilmu Manajemen dan Kewirausahaan Dinamika Pertanian International Journal of Economics and Management Research
Thamrin Thamrin
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Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Physics Other

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PENGARUH PUPUK BOKASHI DAN NPK MUTIARA TERHADAP PERTUMBUHAN DAN HASIL JAGUNG MANIS (Zea mays saccharata L.) Eka Rahmawati; Thamrin Thamrin; Mohammad Tri Wardani
Jurnal Magrobis Vol. 21 No. 1 (2021): Jurnal Magrobis
Publisher : Agriculture Faculty, University of Kutai Kartanegara, Indonesia

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Abstract

This study aims to determine the effect of bokashi fertilizer and NPK mutiara on the growth and yield of hybrid sweet corn. This research was started from November 2017 to March 2018, at Jl.Melak II, Maluhu Village, Tenggarong District, Kutai Kartanegara Regency, East Kalimantan Province. The research was arranged in a randomized complete block design (RCBD) with 4 x 3 factorial analysis with three replications. The first factor is bokasi treatment (b) which consists of 3 levels, namely b0 (without fertilizer), b1 (10.68 kg plot-1), b2 (21.37 kg plot-1) and the second factor of treatment is NPK fertilizer (n). which consists of 4 levels, namely n0 (without fertilizer), n1 (106.87 g plot-1), n2 (213.75 g plot-1), and n3 (248.37 g plot-1). Based on the results of the study, the bokashi treatment had a very significant effect on the average plant height at 14 days after planting. However, there was no significant effect on the average plant height at 34 days after planting and 54 days after planting and the average weight of the cob per plant. The highest average cob with husk weight per hectare (t ha-1) was in treatment b0 with a yield of 8.57 t ha-1 and the lowest was in treatment b2 of 7.22 t h-1. Based on the research results, NPK mutiara treatment has a very significant effect on the average plant height at 14 days after planting. However, it had no significant effect on the average plant height at 34 and 54 days after planting and the average weight of the cob per plant. The highest average cob with husk weight per hectare (t ha-1) was obtained in treatment n0 of 9.89 t ha-1 and the lowest was in treatment n2 with a yield of 5.12 t ha-1. The interaction between bokashi fertilizer and NPK had a very significant effect on plant height 14 days after. However, it had no significant effect on the average plant height at 34 and 54 days after planting and the average weight of cobs per plant. The highest average cob with husk weight (t ha-1) was obtained in the b0n3 treatment interaction of 12.22 t ha-1 and the lowest was in the b1n2 treatment of 5.05 t ha-1.
THE INFLUENCE OF SUBSTRATE NUTRIENT CONTENT ON THE DENSITY OF SEAGRASS (Enhalus acoroides) IN THE WATERS OF THE ISLAND OF PONCAN, NORTH SUMATRA PROVINCE Ellysa Shintya; Thamrin Thamrin; Zulkifli Zulkifli
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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Abstract

ABSTRACT This research was conducted in April-May 2019 in the waters of Poncan Island, North Sumatra Province, which aims to determine the large nutrient content of substrate (nitrate and phosphate), the level of seagrass density Enhalus acoroides, and to determine the effect of nutrient content of the substrate on the density of seagrass Enhalus acoroides. Determination of the research station by purposive sampling and research sampling using the transect line method. The results showed that the highest nutrient content of substrate (nitrate and phosphate) was found at Station II which has a type of muddy sand substrate and the area is influenced by tourist activity.Nitrate concentration values were 0,074 mg / l and 0,122 mg / l for phosphate concentration values.The highest seagrass density was in Station II with a value of 74,22 stands / m2which had the highest nitrate and phosphate content, and the lowest seagrass density was in Station III which had the lowest nitrate and phosphate concentrations.Simple linear regression test results of the influence of nutrient substrate on the density of seagrass with a value of R2(coefficient of determination) = 0,27 (nitrate), 0,40 (phosphate) indicates there was effect of nitrate and phosphate on the density of seagrass Enhalus acoroides. Keyword: Nutrient Substrate, Nitrate and Phosphate, Seagrass Density 
Analisis densitas Zooxanthella pada karang Acropora sp di Perairan Pulau Talam Tapanuli Tengah Provinsi Sumatera Utara Novri Ditama Syafni; Thamrin Thamrin; Efriyeldi Efriyeldi
Jurnal Zona Vol 6, No 2 (2022)
Publisher : Pelantar Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52364/zona.v6i2.62

Abstract

Coral reefs are a unique ecosystem of tropical waters that have physical function as a beach protector with its nature that can reduce the energy of waves moving towards the coast. Coral reef ecosystems are a good places for spawning, nurturing and food sources for fish. The aim of this research was to determine the density of zooxanthella on coral Acropora sp based on different depths. The method that used in this research was a survey method by taking coral samples using purposive sampling technique, then the samples were analyzed and the data was discussed descriptively at the Marine Biology Laboratory, Faculty of Fisheries and Marine, Riau University. The results of this research on the waters of Talam Island obtained a brightness up to 100% of depth, a current velocity was 0.05–0.10 m/s, temperature ranging from 30-32 0C, salinity of 34 o/oo and pH ranging from 7.2–7.6. The corals that used as research objects for zooxanthella density were taken at a depth of 3 m, 5 m, and 7 m, namely the coral Acropora sp. The results showed that the average zooxanthella density on Acropora sp coral at a depth of 3 meters was 6.35x106 cells/cm2, a depth of 5 meters was 2.63x106 cells/cm2, and 1.95x106 cells/cm2 at a depth of 7 meters. Based on observations, the density zooxanthella was decreased by increasing depth.
Hubungan kondisi tutupan terumbu karang dengan kepadatan megabentos di perairan Pulau Talam Kabupaten Tapanuli Tengah Provinsi Sumatera Utara Alfeus Jhonson Armada H; Thamrin Thamrin; Irvina Nurrachmi
Jurnal Zona Vol 6, No 2 (2022)
Publisher : Pelantar Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52364/zona.v6i2.64

Abstract

This research was conducted in March 2022 in the waters of Talam Island, Central Tapanuli Regency, North Sumatra Province. This study aims to determine the relationship between coral cover and the density of megabenthos in the Talam Island area. The method used in this research is a survey method. Coral cover data were collected using the LIT (Line Intercept Transect) method and megabenthos data were collected using the BBT (Benthos Belt Transect) method. Observations were made at three station points with each station with a depth of 4 meters, 6 meters and 8 meters. The results showed that Talam Island had a good percentage of coral cover with an average of 54.74%. The highest density of megabenthos was Tridacninae found at each station, while the lowest density was Acanthaster planci. The overall megabenthos density has an average of 10.033 ind/ha. Coral reef cover relationship has an influence on the density of megabenthos, there is a strong positive effect on economic megabenthos and a strong negative on non-economic megabenthos.
Kondisi tutupan terumbu karang dan kelimpahan ikan karang famili Pomacentridae di perairan Pulau Talam Kabupaten Tapanuli Tengah Provinsi Sumatera Utara Muhammad Rafli; Zulkifli Zulkifli; Thamrin Thamrin
Jurnal Zona Vol 6, No 2 (2022)
Publisher : Pelantar Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52364/zona.v6i2.65

Abstract

This research was conducted in March 2022 in the waters of Talam Island, Central Tapanuli Regency, North Sumatera Province. This study aims to determine the condition of coral reef cover, abundance of reef fish family pomacentridae and the relationship between live coral cover and abundance of coral fish family pomacentridae in the waters of Talam Island. Coral reef cover data collection was carried out using the LIT (Line Intercept Transect) method, with a transect length of 50 meters and data collection for coral fish family pomacentridae using the UVC (Underwater Visual Cencus) method, with a transect length of 50 meters and a visibility limit of 2.5 meters to right and 2.5 meters to the left. Observations were made at three station points, each station at a depth of 4 m, 6 m and 8 m. Data depth of 4 m is considered to represent shallow waters, 6 m depth represents medium waters and 8 m depth represents deep waters. The results of this study indicate that the average percentage of live coral reef cover in the waters of Talam Island is 54.74% in the good category and the average abundance of coral fish family Pomacentridae is 4760 ind/ha with a total of 1071 individuals and is included in the abundant category. The results of simple linear regression analysis showed a correlation coefficient of 0.937 and a coefficient of determination of 0.8787.
Partisipasi masyarakat dalam pengelolaan sampah pemukiman di Kecamatan Senapelan Kota Pekanbaru Febriana Zulmi; Yusni Ikhwan Siregar; Thamrin Thamrin
Jurnal Zona Vol 6, No 2 (2022)
Publisher : Pelantar Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52364/zona.v6i2.60

Abstract

The problem of waste management which is still a city problem, if the waste is not done properly it will cause problems. Uncontrolled piles of garbage due to human activities will have an impact on environmental problems such as decreasing the beauty of the city, the emergence of odors from waste decomposition, the occurrence of air pollution due to burning waste that interferes with public health and a source of disease for human health. This research was conducted in Senapelan District, Pekanbaru City from February to April 2022. The type of research is quantitative analytic with cross sectional. The population is all heads of families with a sample of 94 people with purposive sampling. The results showed that there was no influence of age, education, occupation, on community participation in residential waste management in Senapelan District, Pekanbaru City and there was an influence on infrastructure, knowledge, perception, on community participation in residential waste management in Senapelan District, Pekanbaru City. It takes a conducive environment and good infrastructure in waste management in settlements in Senapelan District, Pekanbaru City
Hubungan kepadatan megabentos dan padatan tersuspensi terhadap tutupan terumbu karang pada Kawasan Konservasi Pesisir dan Pulau-Pulau Kecil (KKP3K) Tapanuli Tengah, Sumatera Utara Bima Wahyu Nugroho; Rifardi Rifardi; Thamrin Thamrin
Jurnal Zona Vol 6, No 2 (2022)
Publisher : Pelantar Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52364/zona.v6i2.61

Abstract

This research was conducted in March 2022 in the Marine Conservation Area, Tapanuli Tengah Sumatera Utara. This study aims to determine the relationship between coral cover, total suspended solid and the density of megabenthos found in the Marine Conservation Area, Tapanuli Tengah Sumatera Utara. The method used in this study is a survey method and spatial analysis tools method. Coral cover data was collected using the LIT (Line Intercept Transect) method and megabenthos data was collected using the BBT (Benthos Belt Transect) method. The results showed that Marine Conservation Area, Tapanuli Tengah, Sumatera Utara had a good percentage of coral cover. Not all types of megabenthos are present at every station, the highest density of megabenthos is Tridacninae, while the lowest density is Acanthaster planci. Then it was also found that there was an effect of the percentage of coral cover on economic and non-economic megabenthos. Total suspended solid consentration in this area was found  with an average of 8.27 mg/l. Based on the regression analysis in this study, showed that there was an effec of total suspended solid on percentage of coral cover.
KEBERLANJUTAN BIOTA SUNGAI SAIL KOTA PEKANBARU (STUDI KASUS DISTRIBUSI DAN KELIMPAHAN MAKROZOOBENTHOS) Muhammad Hasby; Thamrin Thamrin; Sukendi Sukendi
DINAMIKA PERTANIAN Vol. 29 No. 3 (2014): Jurnal Dinamika Pertanian Edisi Desember 2014
Publisher : UIR Press

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Abstract

Study on the biota sustainability of Sail River in Pekanbaru city was carried out in Sail River on June 2014. The objective of this study was to identify the macrozoobenthos community structure and its relation to the physical and chemical parameters of Sail river. Water and macrozoobenthos samples were taken at each station with 3 replications at the 5 stations, namely a sampling point upstream, mid-stream and downstream Sail River. The samples were analyzed in the Laboratory of Aquatic Ecology, Fishery and Marine Science Faculty, Riau University. The results indicate the macrozoobenthos samples were consisted of 3 phylums, 4 classes and 10 specieses. The abudance of the organisms was 68-532 individu/m2 with the diversity index (H’) was 0,65-2,19, the domination index (C’) was 0,23-0,72 and the homogenity index was 0,65-0,94. The Ammonia (NH3) and Chemical Oxygen Demand (COD) of the water exceeded the maximum threshold suggested by the Goverment Decree No. 82 / 2001, the Management of Water Quality and Pollution. The results showed the positive correlation betwen macrozoobenthos with various physical and chemical characteristics of the water, and the sediment and texture of the bottom material.
Pengaruh Orientasi Pelanggan Terhadap Kinerja Pemasaran Coffee Shop Di Kota Padang Melalui Kapabilitas Penciptaan Nilai Sebagai Variabel Mediasi Rifa Nabila Syahira; Thamrin Thamrin
Maeswara : Jurnal Riset Ilmu Manajemen dan Kewirausahaan Vol. 1 No. 5 (2023): OKTOBER : Maeswara
Publisher : Asosiasi Riset Ilmu Manajemen Kewirausahaan dan Bisnis Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/maeswara.v1i5.186

Abstract

This study aims to analyze how customer orientation, value creation capabilities and marketing performance affect coffee shops in Padang city. This research was conducted on 90 coffee shop business actors in Padang city with quantitative research methods. The data of this study were analyzed by using PLS 4, the data processed in this study to examine the relationship between customer orientation, value creation capabilities on marketing performance. This study produces answers that all hypotheses are proposed and shows that customer orientation has a significant positive effect on the performance of coffee shops in the city of Padang. Customer orientation has a positive and significant influence on value creation capabilities. Value creation capability has a positive and significant influence on the marketing performance of coffee shops in Padang city. Customer orientation has a positive and significant effect on the marketing performance of coffee shops in Padang city through value creation capability as a mediating variable.
The Effect of E-Service Quality, E-Trust and E-Satisfaction on Repurchase Intention through Prior Online Experience as a Moderation Variable : (Empirical Study on Tokopedia E-Commerce Service Users in Padang City) M Nabil Akmal; Thamrin Thamrin
International Journal of Economics and Management Research Vol. 4 No. 2 (2025): August: International Journal of Economics and Management Research
Publisher : Pusat Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/ijemr.v4i2.397

Abstract

This study aims to analyze the influence of e-service quality, e-trust, and e-satisfaction on the repurchase intention of Tokopedia marketplace customers in Padang City, and to examine the role of prior online experience as a moderating variable in this relationship.The study uses a quantitative approach with hypothesis testing to test the causal relationship between the independent and dependent variables. Based on the results of data analysis, it was found that e-service quality and e-satisfaction have a positive and significant effect on repurchase intention, while e-trust does not have a significant effect on repurchase intention. Regarding the role of prior online experience as a moderating variable, the results of the study show that previous online shopping experience is able to moderate (strengthen) the relationship between e-service quality and repurchase intention as well as the relationship between e-satisfaction and repurchase intention. However, prior online experience failed to moderate the relationship between e-trust and repurchase intention. Based on the results of the analysis, it shows that the quality of electronic services and customer satisfaction supported by previous positive experiences are key factors that drive repurchase intention on the Tokopedia marketplace, while consumer trust does not relatively affect repurchase intention in the context of this study.
Co-Authors Abd. Rasyid Syamsuri Adi Candra Adrian Adrian Afrizal Tanjung Ahmaddul Hadi Alfeus Jhonson Armada H Almasri Amelia Linggawati Andi Yusapri Anisa Novia Sari Anniswati Anniswati Aras Mulyadi Astuti Marnis Ayura Amanda Fassa Bima Wahyu Nugroho Delsina Faiza Desyandri Desyandri Edidas , Edidas Efriyeldi, Efriyeldi Eka Rahmawati Elizal, Elizal Ellysa Shintya Elmizal Elmizal Fachry Abda El Rahman Farid Febrianda Fauzi Rizky Harahap Febeyessy Aritonang Febriana Zulmi Firman Indra Arya Gina Ulfa Fitria Hanesman Hanesman Hapzi Ali Heni Pujiastuti Ilmiyati Rahmy Jasril Ince Raden Irvina Nurachmi Jean Novia Ain Joko Samiaji Juliaman Sitopu Kasman Rukun Khaidir Khaidir M Nabil Akmal M. Ridho Fadillah Mesi Yurez Mohammad Tri Wardani Mubarak Mubarak Muhammad Hafiz Perdana Muhammad Hasby Muhammad Rafli Musrifin Galib Nita Cahyaning Novri Ditama Syafni Nursyirwani, Nursyirwani Putra Jaya Rana Zahra Rifa Nabila Syahira Rifardi Riki Apriyandi Rizky Almanda Sabran Sabran Setyo S. Moersidik Sofyan Husein Siregar Sopyan Hadi Sukendi Sukendi Syafruddin Nasution Syaiful Bahry Wenika Fitria Dona Windy Anjeli Hutahaean Wonang Saputra Yusni Ikhwan Siregar