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All Journal Agrikultura AGROEKOTEKNOLOGI JURNAL ILMU PERTANIAN Jurnal Penelitian Pertanian Terapan Jurnal AGROSAINS dan TEKNOLOGI SAINS TANAH - Journal of Soil Science and Agroclimatology Agrotekma: Jurnal Agroteknologi dan Ilmu Pertanian Jurnal Penelitian Kelapa Sawit Jurnal Agronomi Tanaman Tropika (JUATIKA) Jurnal Agro Estate Journal La Lifesci PERTANIAN TROPIK Jurnal Indonesia Sosial Teknologi Agrotech Journal Agroista: Jurnal Agroteknologi Agroland: Jurnal Ilmu-ilmu Pertanian Biodiversitas Journal of Biological Diversity
Mariani sembiring
Faculty Of Agriculture, Universitas Sumatera Utara. Jl. Prof. A. Sofyan No. 3, Kampus USU Padang Bulan, Medan 20155, North Sumatra, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Environmental Science Immunology & microbiology Law, Crime, Criminology & Criminal Justice Social Sciences

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Dynamics of Capsaicin Content of Red Chili (Capsicum annum L.) under Various Nutrient and Fertilization Statuses Okto Prandi Sihombing; Sarifuddin; Mariani Sembiring
JURNAL AGRONOMI TANAMAN TROPIKA (JUATIKA) Vol. 8 No. 1 (2026): Jurnal Agronomi Tanaman Tropika (JUATIKA) Vol. 8 No. 1 January 2026
Publisher : LPPM UNIVERSITAS ISLAM KUANTAN SINGINGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36378/juatika.v8i1.4895

Abstract

Accurate fertilization is an important factor affecting plant productivity. Indonesia currently ranks fourth amongthe world's largest red chili producers, but its productivity remains relatively low. Efforts to increase productivitycan be achieved through soil and plant analysis to provide site-specific fertilizer recommendations tailored toplant needs. This study aims to develop site-specific fertilizer recommendations to increase red chili productivityand to analyze the relationship between plant nutrient status and capsaicin content in Lubuk Cuik Village, LimaPuluh Pesisir District, Batubara Regency. The study was conducted at an altitude of 8 m above sea level using asurvey method. Plant samples were selected purposively based on differences in variety and harvest time, thenanalyzed in the laboratory as a basis for compiling fertilizer recommendations. The results showed that thenutrient status of red chili plants at the study site remained below optimal levels. Therefore, site-specificfertilizer recommendations were developed using a combination of three approaches: maintenance, sufficiency,and build. The fertilization guidelines were designed to achieve a yield of 21 tons/ha for the following varieties:Jitu (Urea 531 kg/ha, TSP 92 kg/ha, KCl 258 kg/ha), Laju (Urea 505 kg/ha, TSP 96 kg/ha, KCl 258 kg/ha), andlocal variety (Urea 513 kg/ha, TSP 94 kg/ha, KCl 255 kg/ha), assuming that crop residues are returned to thefield. Multiple regression analysis indicated that the relationship between nutrient status and capsaicin contentwas not statistically significant (R² = 0.084). However, nitrogen (N) and sulfur (S) tended to increase capsaicinlevels, whereas potassium (K) and phosphorus (P) tended to decrease them. The novelty of this study lies in thesimultaneous use of three approaches to link plant nutrient status analysis with site-specific fertilizerrecommendations, which is relatively new in red chili research.
Evaluation Status Hara Land and Leaf Plant Coconut Palm oil (Elaeis guineensis) Plantation People in Linggabayu District, Mandailing Natal Regency, North Sumatra Province, Indonesia Noviantika Nasution; Mukhlis; Mariani Br Sembiring
JURNAL AGRONOMI TANAMAN TROPIKA (JUATIKA) Vol. 8 No. 1 (2026): Jurnal Agronomi Tanaman Tropika (JUATIKA) Vol. 8 No. 1 January 2026
Publisher : LPPM UNIVERSITAS ISLAM KUANTAN SINGINGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36378/juatika.v8i1.5129

Abstract

Oil palm (Elaeis guineensis Jacq.) is one of the most important plantation crops in Indonesia, and requireseffective soil and nutrient management to achieve optimal productivity. This survey aimed to evaluate soil andleaf nutrient status in oil palm plantations managed by smallholders in Linggabayu District, Mandailing NatalRegency, North Sumatra Province, Indonesia. Data were collected through field observations and soil and leafsampling in Batuloting Village, Banjar Selamat, and Padang Silojongan, with 10 trees sampled at each location. Allsamples were analyzed at the PT Socfin Indonesia (SOCFINDO) Laboratory to determine the macronutrient contentof nitrogen (N), phosphorus (P), potassium (K), and magnesium (Mg). The results showed that soil N, P, and Klevels at most locations were low to very low, while Mg levels ranged from low to high. Leaf tissue analysisrevealed that nitrogen content was generally within the optimal range at almost all locations, except in BanjarSelamat Village and Padang Silojongan, where deficiency symptoms were observed. Phosphorus content in leavesranged from adequate to optimal, while potassium content varied from low to optimal across sampling locations.Magnesium levels in leaves were relatively adequate, although a small percentage of samples still indicateddeficiencies. These findings suggest that, despite generally limited soil fertility, oil palm plants can effectivelyabsorb nutrients. This condition is supported by current fertilization practices and the physiological adaptabilityof oil palm plants to efficiently utilize soil nutrients. Therefore, site-specific nutrient management, particularlyfor N, P, and K, is recommended to improve soil fertility and maintain oil palm productivity in smallholderplantations.
Functional diversity of bacteria in various saline soil plant vegetations around Sialang Buah Coast, North Sumatra, Indonesia Mariani Sembiring; Juli M. Hutahuruk; Dwi Ningsih Susilowati; Erny Yuniarti; T. Sabrina; Luthfi A. Mahmud Siregar
SAINS TANAH - Journal of Soil Science and Agroclimatology Vol 21, No 2 (2024): December
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/stjssa.v21i2.80075

Abstract

Environmental conditions profoundly influence microbial diversity and activity in soil. For optimal growth, soil microbes face limiting factors such as temperature, moisture, pH, and salinity levels. This study aims to find types of functional bacteria that are able to live in saline soils. The study was conducted in the Soil Biology Laboratory at Universitas Sumatera Utara (USU), Indonesia. Soil samples were collected around the Sialang Buah Coast, Serdang Bedagai Regency, North Sumatra, Indonesia. The method employed in this research was random composite sampling taken from three vegetation types: mangrove forests, grasslands, and oil palm plantations, with sample collection locations influenced by tidal fluctuations. Ten sampling points were taken at each location and then composited for each vegetation type. The results of the study showed that there were ten species of bacteria that were able to live in saline soil, namely Pseudomonas aeruginosa, Burkholderia gladioli, Enterobacter cloacae, Brucella ciceri, Ochrobactrum oryzae, Achromobacter xylosoxidans, Priestia flexa, Enterobacter quasiroggenkampii, Bacillus cereus and Ochrobactrum oryzae. All bacteria found were able to grow on Pikovskaya, Alexandrov, and Jensen media and only seven species of bacteria were able to form biofilms, namely P. aeruginosa, B. gladioli, E. cloacae, B. ciceri, A. xylosoxidans, P. flexa, and E. quasiroggenkampii
Respons Pertumbuhan dan Serapan Hara Fosfat Bibit Kelapa Sawit (Elaeis guineensis Jacq.) Pada Media Gambut Yang Diaplikasi Amelioran dan Pupuk Hayati Nanda Rizky Utami; Abdul Rauf; Mariani Sembiring
Jurnal Penelitian Kelapa Sawit Vol 34 No 1 (2026): Jurnal Penelitian Kelapa Sawit
Publisher : Pusat Penelitian Kelapa Sawit

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/iopri.jur.jpks.v34i1.229

Abstract

This research aims to examine the effect of the application of ameliorants and biofertilizers on growth, phosphorus nutrients in the soil, and nutrient absorption in plants. This research was conducted in a greenhouse at the Faculty of Agriculture, University of North Sumatra, using peat soil, volcanic ash, zeolite, mycorrhiza, and phosphate-solubilizing bacteria. This study used a Randomized Block Design (RBD) with two factors. The first factor is biofertilizer: control, phosphate-solubilizing bacteria (PSB), arbuscular mycorrhizal fungi (AMF), and a combination of PSB with AMF. The second factor is ameliorant: control, volcanic ash, zeolite, and a combination of volcanic ash with zeolite: with 3 replications. The results showed that there was an increase in the height of oil palm seedlings where the best treatment was the application of AMF (1.97% - 7.88%) and the best treatment for the application of volcanic ash (4.27% - 7.07%). In the observation of soil pH, the application of ameliorants had a significant effect (3.53% - 4.5%) on all materials, while the application of biofertilizers also had a significant effect on the increase in soil pH (1.41% - 3.84%) on all materials provided. In the observation of available phosphorus in the soil, the application of biofertilizers affected the increase in the value of available phosphorus in the soil, where the best value was from the application of PSB (10.31%), while the application of ameliorants also had a significant effect where the best treatment was the application of volcanic ash (30.63%). In the measurement of phosphorus nutrient absorption, the application of biofertilizers had a good effect (increased) (13.41%) compared to the control, but in the application of ameliorants, there was a decrease in phosphorus absorption results compared to the control with the lowest value in the application of zeolite (-1.56%). The results of this study indicate that ameliorants and biofertilizers can be recommended for marginal soils, especially peat soils, as supporting materials for the media in oil palm seedling cultivation.
Soil macrofauna diversity in andisol after eight years of Mount Sinabung eruption in Sumatra, Indonesia mariani sembiring; HIDAYATULAH MUNAWAROH; MUKHLIS MUKHLIS; BENNY HIDAYAT; TENGKU SABRINA
Biodiversitas Journal of Biological Diversity Vol. 22 No. 6 (2021)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d220603

Abstract

Abstract. Sembiring M, Munawaroh H, Mukhlis, Hidayat B, Sabrina T. 2021. Soil macrofauna diversity in andisol after eight years of Mount Sinabung eruption in Sumatra, Indonesia. Biodiversitas 22: 3024-3030. The eruption of Mount Sinabung resulted in volcanic ash covering the soil of various thicknesses. That will affect the population and diversity of macrofauna in it. This research aimed to determine the Andisol soil macrofauna in Karo District with various thicknesses of volcanic ash covering from Mount Sinabung. This research was conducted in May 2019. Plots were placed in four locations, Location I: processed land (0 cm), Location II: Land covered by thin ash (?2 cm), Location III: Land covered by medium ash (2-5 cm), Location IV: Land covered by thick ash (?5 cm). Sampling was conducted by using the Pitfall trap, Monolith squared, and Hand sorting methods. The research results indicated that the thicker the volcanic ash covering the soil surface, it would reduce soil moisture, soil water content, organic C, and soil pH, but on the other hand, increase the soil temperature. A total of 20 species were able to live on the Andisols affected by the eruption of Mount Sinabung.
Diversity of non-symbiotic nitrogen-fixing bacteria and their potential in andisols affected by the eruption of Mount Sinabung, North Sumatra, Indonesia mariani sembiring; T. SABRINA
Biodiversitas Journal of Biological Diversity Vol. 22 No. 8 (2021)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d220854

Abstract

Abstract. Sembiribg M, Sabrina T. 2021. Diversity of non-symbiotic nitrogen-fixing bacteria and their potential in andisols affected by the eruption of Mount Sinabung, North Sumatra, Indonesia. Biodiversitas 22: 3539-3544. Nitrogen is the main macro-nutrient that is very important for plant growth. Nitrogen is absorbed by plants in the form of NO3-or NH4+ ions from the soil. The andisols affected by the eruption of Mount Sinabung alter the chemical, physical and biological characteristics of the soil. As a result, the population of beneficial microbes in the soil decreased, so soil fertility also decreased. The aim of this research is to determine the diversity of nitrogen-fixing microbes in andisol soil affected by the Mt. Sinabung eruption. The soil samples used in this research were collected from andisols affected by the eruption of Mount Sinabung. The isolation of non-symbiotic nitrogen-fixing bacteria was carried out using a nitrogen-free Jensen medium. The results showed that five non symbiotic N-fixing bacteria can increase the N content in andisols affected by Mount Sinabung eruption. Enterobacter cloacae can increase soil N by 111.76% as compared to without microbial application.
Diversity of phosphate solubilizing bacteria and fungi from andisol soil affected by the eruption of Mount Sinabung, North Sumatra, Indonesia MARIANI SEMBIRING; T. SABRINA
Biodiversitas Journal of Biological Diversity Vol. 23 No. 2 (2022)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d230216

Abstract

Abstract. Sembiring M, Sabrina T. 2021. Diversity of phosphate solubilizing bacteria and fungi from andisol soil affected by the eruption of Mount Sinabung, North Sumatra, Indonesia. Biodiversitas 23: 713-719. Phosphate solubilizing microbes are present in all locations with different population levels. The eruption of Mount Sinabung in 2013 resulted in changes in soil pH and the soil’s microbial population, such as phosphate solubilizing microbes. This research aimed to obtain environmentally-specific phosphate solubilizing microbes derived from andisol soil impacted by the eruption of Mount Sinabung, which excelled in increasing the availability of phosphate. Sampling was conducted in Desa Kutarayat, Naman Teran Sub-district, Karo District, North Sumatra Province, Indonesia. Isolation of phosphate solubilizing microbes was carried out on pikovskaya media, and test of phosphate solubilizing microbes potential was conducted on solid and liquid pikovskaya media. Organic acid content was determined using high performance liquid chromatography (HPLC) and microbial identification was performed using PCR-sequencing. The result showed that 4 isolates of each phosphate-soluble fungi and bacteria were isolated from andisol soil affected by the eruption of Sinabung mountain. It was also observed that phosphate solubilizing microbes’ ability to produce organic acids varied. The obtained fungi could dissolve P in some phosphate source either on solid media or liquid medium. Talaromyces pinophilus (J2) can increase the highest availability of P in andisol soil.
Diversity of potassium solving microbes on andisol soil affected by the eruption of Mount Sinabung, North Sumatra, Indonesia MARIANI SEMBIRING; T. SABRINA
Biodiversitas Journal of Biological Diversity Vol. 23 No. 4 (2022)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d230406

Abstract

Abstract. Sembiring M, Sabrina T. 2022. Diversity of potassium solving microbes on andisol soil affected by the eruption of Mount Sinabung, North Sumatra, Indonesia. Biodiversitas 23: 1759-1764. Potassium (K) is one of the macronutrients needed by plants for seeds' growth, development, and quality. Andisols covered by volcanic ash from Mount Sinabung contain potassium ranging from 0.39-0.58 me/100g. The use of microbes is one of the alternatives methods to increase the availability of potassium in the soil that can be absorbed by plants. This study aimed to find environment-specific superior potassium-solvent microbes. Soil sampling was carried out in Kutarayat Village, Nama Teran Sub-district, Karo District, North Sumatra, Indonesia. The method used is random composite sampling by taking samples from 4 different locations. Sampling points were taken on Andisol soil that had been processed, covered with thin, medium, and thick ash. Sampling was carried out at a depth of 0-20 cm from the ground surface around the rhizosphere area. Isolation of bacteria and fungi was carried out by using multilevel dilutions. The microbes obtained after using the pour plate method were identified at molecular level by using PCR. Microbial potential test was carried out by using andisol soil which was incubated for 30 days. Parameters observed were soil pH, exchangeable potassium, soil organic carbon, and microbial population. 7 bacterial isolates and 3 potassium solubilizing fungi were isolated and identified during the present study. All bacterial and fungal isolates obtained were able to increase the availability of potassium soil exchange. The research results show that Talaromyces pinophilus can increase potassium soil exchange up to 102.94%.
Effectiveness of Dyella japonica and Enterobacter cloacae as biofertilizers to increase maize (Zea mays) production on andisol soil MARIANI SEMBIRING; TENGKU SABRINA
Biodiversitas Journal of Biological Diversity Vol. 23 No. 7 (2022)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d230704

Abstract

Abstract. Sembiring M, Sabrina T. 2022. Effectiveness of Dyella japonica and Enterobacter cloacae as biofertilizers to increase maize (Zea mays) production on andisol soil. Biodiversitas 23: 3338-3343. Nitrogen is a very important nutrient in plant growth because it is one of the constituents of plant cells. The availability of nitrogen nutrients in the soil is very low, and this is because nitrogen is easily leached and easy to evaporate. Application of N-fixing microbes is one way to increase the availability of nitrogen in the soil. This study aims to utilize nitrogen-fixing microbes to increase nutrient uptake, production, and efficiency of urea fertilization. The study used a factorial randomized block design (RBD) consisting of Factor I, namely biofertilizer consisting of 4 treatments, namely without the application of bacteria (N0), Dyella japonica 5g (N1), Enterobacter cloacae 5g (N2) and D. japonica 2.5g + E. cloacae 2.5g (N3). Factor II is urea fertilizer with 5 levels U0 = No urea fertilizer, U1 = 1.25 g, U2 = 2.50 g, U3 = 3.75g and U4 = 5g. Parameters observed were plant height observed in weeks I-VIII, plant nitrogen (N) uptake (mg/plant), phosphorus (P) uptake (mg/plant), potassium (K) uptake (mg/plant), and plant production (g). Sampling of plants for analysis of nutrient uptake was carried out at the end of the vegetative period, namely the 8th week, while for plant production parameters, plant samples were taken at the 12th week. The results showed that the applications of nitrogen-fixing bacteria could increase N uptake up to 89.35%, P uptake up to 79.57%, K uptake up to 48.81%, and crop production increase up to 49.76%. The applications of nitrogen-fixing microbes can streamline the use of urea fertilizer by up to 50%. In general, the best treatment is the applications of D. japonica and E. cloacae plus 2.5g urea (N3U2).
Exploring the diversity of cellulolytic microorganisms from tea factory waste and evaluating their potential in breaking down tea waste MARIANI SEMBIRING; MUKHLIS MUKHLIS; RAZALI RAZALI; BENNY HIDAYAT
Biodiversitas Journal of Biological Diversity Vol. 26 No. 1 (2025)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d260137

Abstract

Abstract. Sembiring M, Mukhlis, Razali, Hidayat B. 2025. Exploring the diversity of cellulolytic microorganisms from tea factory waste and evaluating their potential in breaking down tea waste. Biodiversitas 26: 377-385. The rate at which organic materials decompose is influenced by their cellulose, lignin, and hemicellulose content. To accelerate the decomposition process, cellulolytic microorganisms can be employed, which can be isolated from organic materials. Tea plants, as a significant plantation commodity, produce various types of waste during processing, including solid, liquid, and gas wastes. Solid waste from tea factories is produced in large quantities year-round and has substantial potential as a source of organic material. This research aimed to find cellulolytic microbes that were sourced from tea waste and have superior potential in the decomposition of organic matter, especially tea waste. The research involved several stages: isolating microbes from semi-processed waste from the Bah Butong tea factory, purifying the microbes to obtain pure isolates, testing the semi-qualitative potency of these isolates on CMC (Carboxyl methyl cellulase) media, and assessing the degradation potential of the superior isolates on raw tea factory waste. The research findings revealed the presence of five bacteria and two fungi from tea factory waste that have potential as decomposer microbes: Enterobacter oligotrophicus (AS), Stenotrophomonas maltophilia H05 (BS), S. maltophilia (CS), Priestia megaterium (DS), Methylophilus methylotrophus (ES) and cellulolytic fungi Aspergillus fumigatus (J1) and Aspergillus corrugatus (J2). Overall, the use of these cellulolytic bacteria and fungi can accelerate the decomposition of tea factory waste, with compost nitrogen content increasing by 102%. The application of Aspergillus corrugatus (J2) and Methylophilus methylotrophus (ES) is the best treatment with the lowest C/N ratios and the highest total nitrogen content.
Co-Authors ABDUL RAUF Abdul Rauf Abdul Rauf Abdul Rauf Ade Ine Imansari Agustini, Fenny Alfredo Sitorus Alida Lubis Amos Simanungkalit Andi Andi Andri Ikhsan Armando Septian Simbolon Armando Septian Simbolon Aslan Pasaribu Asmarlaili S. Hanafiah asmarlaili sahar hanafiah Beatrix I. L. J. Sinaga BENNY HIDAYAT BENNY HIDAYAT Benny Hidayat Benny Hidayat Bintang Bintang Sitorus Bintang Sitorus Budi Ananda Pratama Budi Ananda Pratama Cynthia Simanjuntak Damanik, Revandy Damanik, Revandy I.M Danu Syahputra Lubis Dea Walucky Saragih Deni Elfiati Deni Elfiati deyu zahraini putri Dwi Ningsih Susilowati Edi Sigit Sutarta Edi Sigit Sutarta Eko Andreas Sihite Erny Yuniarti Fauzi Fauzi Githa Noviana Guntoro Guntoro . Hardy Guchi Hendrik Dharmansyah HIDAYATULAH MUNAWAROH Imam Ramadhan Intan Safitri Jamila Jamilah Jamilah Jamilah Jul Bahori Panggabean Juli M. Hutahuruk Julpan Lynneus Sitohang Lady Sarah Lisa Mawarni Luthfi Aziz Mahmud Siregar M.M.B. Damanik Manullang, Yedija Mardiana Wahyuni Mardiana Wahyuni@gmail.com Marta Ritonga Meilissa Damayanti Lumban Gaol Muhammad Maulana Ghifari Muhammad Nazarul Yanis Muhammad Titan Hafizal Muhammad Yusuf Dibisono Mukhlis MUKHLIS MUKHLIS Mukhlis Mukhlis MUKHLIS MUKHLIS Mukhlis Mukhlis Muklis Muklis Nanda Rizky Utami Ni Komang Sri Lumbung Artha Wardani Nini Rahmawati Nofriyanto Pakolo Nofriyanto Pakolo Noviantika Nasution Novita Sari Nur Ulina Warnisyah S Sebayang, Nur Ulina Warnisyah S Okto Prandi Sihombing Posma Marbun Purba Marpaung Putra, P. A. S. Putu Oka Samirana rahmayanti rahmayanti Raja Forman Barasa Razali RAZALI RAZALI Revandy Damanik Rhiki Budianto Ricky Elmando Saragih Ridwandi Ridwandi Rino P. C. Purba Rizky Dharmawan Margolang, Rizky Dharmawan Margolang, Ropikoh Hasibuan Sakiah Sakiah Sakiah Sakiah Sarifuddin Sarifuddin Sarifuddin Sitohang, Julpan Lynneus Sitorus Sitorus Supriadi Supriadi Supriadi Susianti Susianti Marbun T Sabrina T Sabrina T. SABRINA T. SABRINA T. SABRINA T. Sabrina TENGKU SABRINA TENGKU SABRINA Tengku Sabrina Tengku Sabrina Tengku Sabrina Tioner Purba Tosuko Utomo Triani, Agus vijay sitanggang Viky Fatmala Wahyuni, Mardiana Wilda Lumban Tobing Yaya Hasanah Yedija Manullang Yopie Priest Aulia Sinaga yudi sudarno sihombing Zoel Hani Hasibuan Zulkifli Nasution Zulkifli Nasution