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All Journal JTSL (Jurnal Tanah dan Sumberdaya Lahan) Journal of Degraded and Mining Lands Management Wikrama Parahita : Jurnal Pengabdian Masyarakat Jurnal Pengabdian Pada Masyarakat Paspalum: Jurnal Ilmiah Pertanian Soil REns Agrikultura Masyarakat Tani: Jurnal Pengabdian kepada masyarakat
Marenda Ishak Sonjaya Sule
Agroteknologi, Universitas Padjadjaran
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Environmental Science Industrial & Manufacturing Engineering Social Sciences Other

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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.
Co-Authors Abraham Suriadikusumah Adawiah, Aliya Zahrah Ade Setiawan Alifa Salsabila Anindya Apong Sandrawati Bari, Ichsan Nurul Betty Natalie Fitriatin Cucu Suherman Emma Trinurani Sofyan Fiky Yulianto Wicaksono Geavani Meidinisa Setiadi Gustian, Daffa Gamyam Herislan, Raihan Febriana Hidayat, Syamsuddin Irwandhi Nadia Astriani Nadia N Kamaluddin Pujawati Suryatmana Reginawanti Hindersah Rina Devnita Satria, Rievansyah Eka Shantosa Yudha Siswanto Shantosa Yudha Siswanto Siswato, Shantosa Yudha Triyani Dewi Widara Almaghfirah Ismail