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All Journal PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat Acta Solum
Melinda Trisya Yulianto
Universitas Pembangunan Nasional Veteran Jawa Timur
Agriculture, Biological Sciences & Forestry Economics, Econometrics & Finance Law, Crime, Criminology & Criminal Justice Public Health Social Sciences

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Humic Acid and Nitrogen Fertilizer Effects on Nitrogen Availability and Bacterial Population in Sipramin-Affected Paddy Soil Melinda Trisya Yulianto; Wanti Mindari; Rossyda Priyadarshini; Dzarifah Zulperi; M. Ghufron Chakim
Acta Solum Vol. 4 No. 3 (2026): July 2026
Publisher : Department of Soil, Faculty of Agriculture, Lambung Mangkurat University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/actasolum.v4i3.3590

Abstract

The accumulation of sodium (Na) due to the continuous use of sipramin reduces the physical, chemical, and biological quality of soil, thereby affecting nitrogen (N) availability and microbial activity. This study aimed to evaluate the combined effect of humic acid and different nitrogen fertilizer sources on nitrogen availability (NH₄+ and NO₃-) and bacterial population dynamics in sipramin-affected paddy soil. The experiment was conducted under greenhouse conditions using a completely randomized factorial design with two factors: humic acid doses (0, 20, 40, and 60 kg ha-¹) and nitrogen fertilizer sources (NPK Phonska, urea, KNO₃, and MAP) at an equivalent rate of 92 kg N ha-¹. Observations included NH₄+, NO₃-, and total bacterial populations, and data were analyzed using analysis of variance (ANOVA). The results showed that the interaction between humic acid and nitrogen fertilizer did not significantly affect nitrogen availability. However, both factors individually showed significant effects on NO₃- availability, indicating their role in influencing nitrogen dynamics. Bacterial populations increased from 7 to 21 Day After Treatment (DAT) and decreased at 42 DAT, reflecting temporal microbial dynamics during incubation. Although changes in bacterial populations coincided with variations in nitrogen forms, this relationship could not be directly confirmed due to the limitation of total culturable bacteria analysis. These findings highlight the importance of humic acid and nitrogen fertilizer management in regulating nitrogen dynamics under high-Na soil conditions, while further studies on specific microbial groups are needed to better understand the underlying mechanisms.
Implementasi Raised Bed Berbasis Limbah Organik pada Pertanian Perkotaan untuk Mendukung Food Coping Strategy: Implementation of Raised Bed Based on Organic Waste in Urban Agriculture to Support Food Coping Strategy Wanti Mindari; Mirza Ramadhani; Oentari Prilaningrum Sutanto; Melinda Trisya Yulianto; Qonita Mumtazia Kamilah
PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat Vol. 11 No. 5 (2026): PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat
Publisher : Institute for Research and Community Services Universitas Muhammadiyah Palangkaraya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33084/pengabdianmu.v11i5.10778

Abstract

Urban farming has emerged as one of the solutions to strengthen food security, improve environmental quality, and provide economic benefits in urban areas. One commonly applied method is the raised bed system, which optimizes the use of limited land and enhances the efficiency of soil media management. However, farmer groups often face challenges in managing organic waste and optimizing growing media in restricted spaces. This community service program was implemented in collaboration with the Minasari Farmers Group located on Jemursari XIX Street, Jemur Wonosari Sub-district, Wonocolo District, Surabaya, involving 23 members. The stages of activities included site survey and green space landscape design, construction of raised beds, application of Hugelkultur techniques using organic waste (banana trunks, twigs, and other biomass materials), delivery of crop cultivation training, and program evaluation. The results showed that the application of Hugelkultur-based raised beds improved the quality of planting media, expanded opportunities for vegetable and herbal crop cultivation, and supported circular economy principles (3R: Reduce, Reuse, Recycle). Through this program, the Minasari Farmers Group is expected to become a model for productive, aesthetically pleasing, and sustainable urban farming in Surabaya.
Co-Authors Dzarifah Zulperi M. Ghufron Chakim Mirza Ramadhani Oentari Prilaningrum Sutanto Priyadarshini, Rossyda Qonita Mumtazia Kamilah Wanti Mindari