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All Journal Jurnal Ilmu Tanah dan Lingkungan (Journal of Soil Science and Environment) Agrikultura Microbiology Indonesia JTSL (Jurnal Tanah dan Sumberdaya Lahan) Journal of Degraded and Mining Lands Management AGRIVITA, Journal of Agricultural Science Jurnal Agroekoteknologi Jurnal Agro Jurnal Penelitian Pertanian Terapan Kultivasi Jurnal Teknologi Mineral dan Batubara SAINS TANAH - Journal of Soil Science and Agroclimatology Jurnal Agrotek Tropika Jurnal Agrotek Indonesia AGROLOGIA : Jurnal Ilmu Budidaya Tanaman Soil REns Jurnal Tanah dan Iklim Media Kontak Tani Ternak Composite Jurnal Teknologi Mineral dan Batubara Agrikultura Masyarakat Tani: Jurnal Pengabdian kepada masyarakat Scientific Contributions Oil and Gas AGROLOGIA: Jurnal Budidaya Tanaman
Pujawati Suryatmana
Departemen Ilmu Tanah Dan Sumberdaya Lahan, Faperta UNPAD
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Energy Engineering Environmental Science Immunology & microbiology Materials Science & Nanotechnology Medicine & Pharmacology Social Sciences Veterinary Other

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RESISTENSI AZOTOBACTER TERHADAP MERKURI DAN PENGARUHNYA PADA PERTUMBUHAN JAGUNG (ZEA MAYS L.) DI TAILING TAMBANG EMAS Hindersah, Reginawanti; Adawiah, Aliya Zahrah; Suryatmana, Pujawati; Dewi, Triyani
Jurnal Teknologi Mineral dan Batubara Vol 20 No 3 (2024): Jurnal Teknologi Mineral dan Batubara Edisi September 2024
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/jtmb.Vol20.No3.2024.1590

Abstract

Rhizobacteria from the N-fixing Azotobacter genera can be used as bioremediation agents. Azotobacter produces exopolysaccharides (EPS) that chelate heavy metals and synthesize metabolites to promote plant growth. This research aimed to analyze the resistance of the Azotobacter consortium isolated from tailings contaminated with mercury (Hg) in synthesizing secondary metabolites in liquid cultures contaminated with Hg, as well as the effect of the Azotobacter consortium on corn growth in various tailings-based media compositions containing Hg. The Hg resistance test was carried out using a completely randomized design with 100, 200, and 400 mg/L HgCl2 in N-free media. The greenhouse experiment was designed in a randomized block design to treat various concentrations of organic matter in the tailings. The results showed that Azotobacter isolates were able to survive in Ashby broth containing Hg up to 400 mg/L, and the consortium produced significant amounts of auxin, gibberellin, cytokinin, oxalic acid, citric acid, and EPS. In addition, Azotobacter increased corn growth in Hg-contaminated tailings with the addition of 6:4 compost (tailings: compost). Azotobacter is resistant to Hg up to 400 mg/L; as a consortium, it can produce secondary metabolites and has a good influence on the growth of corn in tailings containing Hg.
EFFECTS OF PETROFILIC MICROORGANISMS AND BULKING AGENT ON HYDROCARBON’S BIODEGRADATION EFFICIENCY Zulkifliani Zulkifliani; Pujawati Suryatmana; Annisa Rosalina Sylvia; Syafrizal Syafrizal
Scientific Contributions Oil and Gas Vol 39 No 3 (2016)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.39.3.100

Abstract

Bioremediation is a method which can be used to reduce the amount of pollutants or toxic substances that damage the environment through the use of microorganisms to remove the contaminants. The purpose of this research is to determine the effects of petrofilic microorganisms and bulking agent on the enhancement of hydrocarbon’s biodegradation efficiency, soil water content, growth rate of petrofilic bacteria and Azotobacter vinelandii. Nine treatments in this research were a petrofilic consortium (Pseudomonas spp., Actinomycetes sp., and petrofilic fungi) and Azotobacter vinelandii (biosurfactan), as well as bulking agent (rice husk charcoal and baglog waste of Oyster Mushrooms). The experiment design used was a randomized block design with three replications, so there were 27 experimental units (microscosmos). The result was that the application of petrofilic microorganisms and bulking agent is the best treatment to enhance the efficiency of hydrocarbon’s biodegradation, the growth rate of petrofilic bacteria, and soil water content. The petrofilic consortium treatment with the highest value of biodegradation efficiency reached 83,9%.
Improving substrate properties and foxtail millet growth in gold mine tailings using Azotobacter consortium Hindersah, Reginawanti; Adawiah, Aliya Zahrah; Suryatmana, Pujawati; Sule, Marenda Ishak Sonjaya; Wicaksono, Fiky Yulianto; Dewi, Triyani
Journal of Degraded and Mining Lands Management Vol. 13 No. 1 (2026)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2026.131.9293

Abstract

Improper disposal of mercury (Hg)-contaminated tailings on agricultural fields can reduce land quality for food production. A pot experiment was conducted to evaluate the effect of the Azotobacter consortium, comprising Azotobacter tropicalis S5, A. vinelandii S6a, and A. chrooccocum S9, on the Carbon-to-Nitrogen (C/N) ratio and Hg levels in tailings as well as foxtail millet growth, biomass, and mercury in plants. The experiment used a randomized block design with three levels of Azotobacter liquid inoculant, i.e., 3, 15, and 30 mL per pot, and six replications. The control did not receive inoculant. After six weeks, the treatment did not alter the pH, total nitrogen, organic carbon, carbon-to-nitrogen ratio, or total mercury levels in the soil; however, it did promote an increase in shoot height and leaf number, without affecting plant biomass. Applying 30 mL/pot of Azotobacter inoculant enhanced Azotobacter and total bacterial populations in the rhizosphere. The Azotobacter inoculant did not alter nitrogen uptake but potentially reduced mercury content in the plants. The Pearson’s test showed that Azotobacter levels in the substrate were significantly correlated with the decreased mercury content of plants. These findings suggest that the application of the Azotobacter consortium can lead to improved plant growth and a reduction in mercury uptake by millet plants grown in tailing-based substrate. Further research is necessary to develop more effective inoculants and extend the study period.
Peran Azolla dalam Memperkaya Amelioran Organik sebagai Pupuk Hayati Padat dan Cair pada Padi Organik Setiawati, Mieke Rochimi; Suswanto, Irwan; Suryatmana, Pujawati
Soilrens Vol 23, No 2 (2025)
Publisher : Dept Ilmu Tanah & Sumberdaya Lahan Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/soilrens.v23i2.69717

Abstract

Improvement of rice productivity can be achieved by conducting farming efficiency and utilizing  local resources. The Azolla water fern is a local resource that can be used as organic fertilizer in organic farming. Organic farming is a cultivation technique that utilizes organic materials to preserve the production environment so that the sustainability of agriculture can be maintained. This study aimed to determine the efficiency of the use of organic ameliorant added with Azolla sp. compost and biological fertilizers on soil C-organic content, C/N ratio of soil and organic rice yields. This research was conducted at the Experimental Station of the Faculty of Agriculture, Universitas Padjadjaran. The design used was randomized block design (RBD) with six treatments and four replications. The treatment is used in the form of a combination of organic ameliorants (straw and animal manure 10 tons ha-1 and straw, Azolla sp. and compost 7.5 tons ha-1) and solid and liquid biofertilizers with doses each of 10 kg ha-1  and 5 L ha-1.  Result showed that the soil treated with combination of organic ameliorant added Azolla sp with solid biofertilizer had higher C-organic content compared to other treatments. Whereas the aplication of organic ameliorant added with Azolla sp. combined with liquid biofertilizers has increased organic rice yield.
Efek Inokulasi Bakteri Pemfiksasi N dalam Carrier Organik terhadap Pertumbuhan dan Hasil Padi Gogo pada Inceptisol Suryatmana, Pujawati; Setiawati, Mieke Rochimi
Soilrens Vol 23, No 2 (2025)
Publisher : Dept Ilmu Tanah & Sumberdaya Lahan Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/soilrens.v23i2.69714

Abstract

National rice production in Indonesia is supported by two main rice-growing types—lowland (paddy) and upland (dryland) rice. Lowland rice contributes a larger share to national rice productionthan upland rice. However, several constraints in lowland rice cultivation may hinder efforts to furtherincrease its productivity. One alternative approach to address these constraints is the development ofupland rice cultivation. The objective of this study was to investigate the effects of urea fertilizerdosage and nitrogen-fixing bacteria (NFB) applied with different carrier materials (compost, amixture of compost and rice bran, and Azolla) on the growth and yield of upland rice grown onInceptisols in Jatinangor. The experiment was arranged in a randomized block design with twofactors: urea fertilizer dosage (100% and 50% of the recommended rate) and the application ofnitrogen-fixing bacteria using various carrier materials (compost, rice bran, and Azolla meal) as wellas a liquid culture without a carrier. The results demonstrated that the effect of urea dosage wasindependent of the nitrogen-fixing bacteria applied using carrier materials. Individually, thetreatments were not significantly affected the population of Azotobacter spp. and Azospirillum spp.,plant height, number of panicles, or 1,000-grain weight of upland rice. However, the nitrogen-fixingbacteria inoculation with a mixed carrier (compost, rice bran, and Azolla) significantly increased filledgrain weight, resulting in the highest average filled grain yield of 37.30 g per plant.
Properties of Azotobacter as biofertilizer and biocontrol of Fusarium Reginawanti Hindersah; Vera Oktavia Subardja; Pujawati Suryatmana; Rija Sudirja
AGROLOGIA: Jurnal Ilmu Budidaya Tanaman Vol 13 No 1 (2024): Agrologia : Jurnal Ilmu Budidaya Tanaman
Publisher : Fakultas Pertanian, Universitas Pattimura Ambon, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/agrologia.v13i1.12761

Abstract

The Nitrogen-fixer bacteria, Azotobacters, are the potential Plant Growth Promotion Rhizobacteria for increasing plant growth and productivity due to their prominent role as biofertilizer dan bioprotectant. The objective of the experiment was to identify the plant-growth related characteristic of various Azotobacter isolates and to test their antagonism to soil-borne pathogen Fusarium. The five Azotobacter isolates were grown in Nitrogen-free slant for determining their ability to fix the Nitrogen, producing phytohormones and exopolysaccharides, and to inhibit the growth of Fusarium oxysforum f.sp. batatas. The results verified that all isolates synthesize various concentration of Indole acetic acid, Gibberellin, Zeatin and Kinetin as well exopolysaccharide in the N-free media. However, this study found that Azotobacter AzV1 did not detected to fix the N. This study suggests that Azotobacter has a dual function as biofertilizer and bioprotectant.
Pengaruh Pengetahuan Petani terhadap Minat Penggunaan Pupuk Hayati dan Pupuk Organik di Desa Mekarasih, Kecamatan Jatigede, Kabupaten Sumedang Herdiyantoro, Diyan; Suryatmana, Pujawati; Setiawan, Ade; Sandrawati, Apong; Sara, Dirga Sapta; Kamaluddin, Nadia Nuraniya; Ismail, Ade
Agrimasta Vol 3, No 2 (2026): Maret
Publisher : Fakultas Pertanian, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/agrimasta.v3i2.70294

Abstract

Peningkatan adopsi pupuk hayati dan pupuk organik merupakan strategi penting untuk pertanian berkelanjutan. Penelitian ini bertujuan menganalisis pengaruh pengetahuan petani terhadap minat penggunaan pupuk tersebut di Desa Mekarasih, Kecamatan Jatigede, Kabupaten Sumedang. Metode penelitian menggunakan kuesioner skala Likert pada sembilan responden dan dianalisis dengan regresi linear. Hasil penelitian menunjukkan pengetahuan petani akan pupuk hayati berpengaruh signifikan terhadap minat penggunaan pupuk hayati (Sig. = 0,007 < 0,05) dengan kontribusi 67,2% (R2 = 0,672), sedangkan pengetahuan petani akan pupuk organik tidak berpengaruh signifikan (Sig. = 0,53 > 0,05). Literasi teknologi pupuk hayati menjadi kunci utama dalam meningkatkan minat petani beralih ke input pupuk yang ramah lingkungan.
The effect of beneficial microorganism as biofertilizer application in hydroponic-grown tomato Setiawati, Mieke Rochimi; Afrilandha, Nandha; Hindersah, Reginawanti; Suryatmana, Pujawati; Fitriatin, Betty Natalie; Kamaluddin, Nadia Nuraniya
SAINS TANAH - Journal of Soil Science and Agroclimatology Vol 20, No 1 (2023): June
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/stjssa.v20i1.63877

Abstract

The use of N2-fixing bacteria and growth hormone-producing rhizobacteria delivers nitrogen, enhances nutrients absorption by plants, and reduces the usage of inorganic fertilizers. Implementing biofertilizer in the hydroponic system as a means to reduce application of synthetic nutrient is recently in interest due to economic, food safety, and sustainability factors. This study determines the effects of biofertilizer dose on tomato yields in the hydroponics system. A randomized block design was utilized that consisted of seven treatments, namely 100% inorganic fertilizer and 0% biofertilizer (control), and various doses of inorganic nutrient combined with 25%, 50%, 75%, and 100% biofertilizer. The result illustrated that the application of biofertilizer augmented the population of endophytic bacteria, Azotobacter sp., Azospirillum sp., phosphate solubilizing bacteria, and nitrogen content. The distinct combination of biofertilizer did not alter the phosphorus and potassium content compared to control samples however resulted in superior tomato grade. The 50% inorganic fertilizer and 100% biofertilizer combination amplified the weight of the fruit by 36% compared to the control. This finding indicates that the application of biofertilizers in the hydroponic system for tomato plants is not only beneficial in minimizing the dosage of inorganic fertilizers but also enhancing the fruit quality.
Synergistic effect of Azotobacter sp. and bulking agents on hydrocarbon bioremediation performance in petroleum-contaminated soil Suryatmana, Pujawati; Hindersah, Reginawanti; Setiawati, Mieke Rochimi; Parnadi, Wahyudi Widyatmoko; Zulkifliani, Zulkifliani; Syafrizal, Syafrizal
Journal of Degraded and Mining Lands Management Vol. 13 No. 3 (2026)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2026.133.10369

Abstract

Petroleum hydrocarbon contamination is a critical environmental issue in tropical soils. This study evaluated the effects of Azotobacter sp. and two bulking agents: rice husk biochar (RHB) and spent oyster mushroom substrate (SOMS),  on a microcosm scale of petroleum-contaminated Ultisols. The experiment design used a randomized block design (RBD). Treatments included single and combined applications of Azotobacter sp. and bulking agents. Results showed that SOMS  amendment yielded significantly (p< 0.05) the highest microbial populations,  fungi (43.23 × 104 CFU g?¹) and bacteria (42.633 x 106 CFU g?¹), the highest degradation rate (0.040 mg L?¹ cell?¹ day?¹) and efficiency (81.62%) compared with the control (0.012 mg L?¹ cell?¹ day?¹; 39.55%). Azotobacter sp. inoculation combined with SOMS increased Azotobacter sp. density (59.167 × 104 CFU g?¹). Azotobacter sp. produced a biosurfactant that was dominated by Oleic acid. The hydrocarbon biodegradation rate improvements were linked to increased soil pH, nutrient availability, and biosurfactant production by Azotobacter sp. Meanwhile, RHB alone showed lower performance, but when combined with Azotobacter sp. improved degradation relative to the control. Integrating Azotobacter sp. inoculation with nutrient-rich bulking agents, particularly SOMS, significantly improves petroleum hydrocarbon biodegradation in Ultisols by optimizing physicochemical and biological conditions for indigenous microbial consortia.
Response of Maize Plant Growth Due to Application of Liquid and Solid (Microbeads) Diazotroph Endophytic Bacteria Biofertilizer (Respon Pertumbuhan Tanaman Jagung Akibat Aplikasi Pupuk Hayati Cair dan Padat (Microbeads) Bakteri Endofitik Diazotrof) Regina Teuresna Dewi; Mieke Rochimi Setiawati; M. Julio Ferdiansyah; Eki Riftahur Rizki; Nadia Nuraniya Kamaluddin; Pujawati Suryatmana; Anne Nurbaiti; Reginawanti Hindersah; Betty Natalie Fitriatin; Rangga Jiwa Wibawa
Jurnal Agroekoteknologi Vol 18, No 1 (2026)
Publisher : Jurusan Agroekoteknologi Fakultas Pertanian Untirta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33512/jur.agroekotetek.v18i1.40482

Abstract

This study aimed to evaluate the effect of diazotrophic endophytic bacteria inoculation in liquid and microbeads formulations on the vegetative growth of maize (Zea mays L.). The experiment was conducted from September 2025 to March 2026 at the Soil Biology Laboratory and Ciparanje Experimental Field, Faculty of Agriculture, Universitas Padjadjaran. The study used a Randomized Block Design consisting of seven treatments and four replications. Treatments included liquid and microbeads biofertilizers containing Gluconacetobacter diazotrophicus strain GD 3-1, Paraburkholderia sp. strain GD 12-2, and their consortium. Observed parameters included plant height, stem diameter, leaf area, intensity of plant pest disturbance, and stem endophytic bacterial population. Data were analyzed using analysis of variance (ANOVA) followed by the Scott-Knott test at a 5% significance level using Statistical Package for the Social Sciences (SPSS) 21. The results showed that biofertilizer application significantly affected maize growth at the late vegetative stage. Liquid formulation of G. diazotrophicus produced the highest plant height at 8 weeks after planting, while microbeads formulation showed more stable growth responses during the observation period. Biofertilizer treatments also increased leaf area and stem endophytic bacterial population compared with the control treatment. In addition, inoculated plants showed better tolerance to pest attacks during the vegetative stage. Overall, the application of diazotrophic endophytic bacteria, particularly G. diazotrophicus, demonstrated potential to improve maize vegetative growth and support sustainable agricultural practices.
Co-Authors . WISJNUPRAPTO Adawiah, Aliya Zahrah Ade Ismail Ade Setiawan Aditya, Fasa Aditya, Fasa Aditya, Fasa Afrilandha, Nandha Agung Karuniawan Agung Muhammad Yusuf Aliya Zahrah Adawiah Alyani Shabrina Amalia Chusnul Anas Ramdhani Andi Hana Mufidah Elmirasari Anne Nuraini Anne Nurbaiti Anne Nurbaity Anni Yuniarti Annisa Rosalina Sylvia Annisa Rosalina Sylvia Apong Sandrawati Asmiran, Priyanka Aten Komarya Bagus Adityo Bang, Sunbaek Benny Joy Betty N. Fitriatin Betty Natalie Fitriatin Budiman, Muhammad Nafariz Chotimah, Andina Christine Angel Damayani, Maya Dedeh H. Arief Dedi Ruswandi Denny Sobardini Sobarna Denny Sobardini Sobarna Dewi, Yeni Wispa Dewikusuma Ikhsani Adhiningtyas Dirga Sapta Sara Diyah Sri Utami Diyan Herdiyantoro Djuwansah, Muhamad Rachman EDWAN KARDENA Eka Safitri Eki Riftahur Rizki Emma Trinurani Sofyan Enny Ratnaningsih Erni Erni Erni Suminar Eso Solihin Evi Entang Fatimah Evi Entang Fatimah Fadhilla Oktavianingtyas Trisilvi Fajri Syahid Nurhakim Febby Nur Indriani Fera Siti Meilani Fiky Yulianto Wicaksono Gordon Pius Marihot Halimah, Ummu ‘Azizah Handayani, Sri Harry Rum Haryadi Ibnu Rizki Perdana Ikrar Nusantara Putra Ikrar Nusantara Putra Ilyas, Ichsan Indra Herliana Iskariman, Ahlan Azman Iva Fitriani Jajang Sauman Hamdani Januar, Dodi Ganjar Jihan Fitria Meilani Khumairah, Fiqriah Hanum Latifah, Tipah Leoni Silvia Lia Nur Linda M. Julio Ferdiansyah Maharani, Nadhira Saniya Mahdi Argawan Putra Mahfud Arifin Marenda Ishak Sonjaya Sule Masruri, Muhammad Kholil Maulana, Nurzen Maya Damayani Maya Damayanti Meddy Rachmadi Mieke Rochimi S Mieke Rochimi Setiawati Mieke Rochimi Setyawati Muhammad Agus Mulyana Muhammad Amir Solihin Nadia N. Kamaluddin Nadia Nuraniya Kamaluddin Nanda Aditya Setyawan NENNY NURLAENY Ninda Meiditia Putri Nizar Ulfah Nugraha, Gita Bina Nugraha, Gita Bina Nugraha, Gita Bina Nurullita Fitri Qurnia Oviyanti Mulyani Parnadi, Wahyudi Widyatmoko Pirda Nurhopipah Probo Condrosari Rachelita, Nadia Rainaldi, Rainaldi Rangga Jiwa Wibawa Rara Rahmatika Risanti Regina Teuresna Dewi Reginawanti Hindersah Reginawati Hindersah Rhazista Noviardi Rhazista Noviardi Rhazista Noviardi Richard A. Gunawan Ridha Hudaya Rija Sudirja Rina Devnita Risanti, Rara Rahmatika Risanti, Rara Rahmatika Salsabilla, Camilla Sandra Amalia Riyadi Sandrawati, Apong Santi Rosniawaty Setiawati, Mieke Richimi Shinta Nurrizqi Indrayani Silmi Rahadiana Putri Sumadi Sumadi Suswanto, Irwan syafrizal Syafrizal Syafrizal Syafrizal Syafrizal Syariful Mubarok Syifa Nabila Kurnia Sylvia, Annisa Rosalina Tarra Martiana Dewi Triyani Dewi Tualar Simarmata Ummu ‘Azizah Halimah Uum Umiyati Vera Oktavia Subardja Vera Oktavia Subarja Wati, Dyah Aditya Yori Tridendra Yudhistari Sihombing Yuliati Machfud Yusup Hidayat Zahra Ilmiyati Zellya Handyman Zulkifliani Zulkifliani Zulkifliani Zulkifliani, Zulkifliani Zulkifliani, Zulkifliani