Herviyanti Herviyanti, Amsar Maulana, Irwan Darfis, Moli Monikasari, Dewi Rezki, Darusman Darusman
Glyphosate contamination in horticultural land, particularly in Inceptisols with low adsorption capacity, necessitates effective amelioration strategies using closed-house chicken litter (CHCL). This study evaluated the adsorption capacity of CHCL-derived compostchar in ameliorated Inceptisols using a completely randomized design (CRD) with three replicates and batch equilibrium methods modeled by the Freundlich and Langmuir isotherms. Compostchar application significantly enhanced soil quality and glyphosate capacity. Incorporation of biochar improved chemical stability and physical properties, as indicated by reduced volatile matter (VM) and increased bound carbon, ash content, pH, electrical conductivity (EC), and cation exchange capacity (CEC). Compared to 15% biochar, the 80% CHCL + 20% biochar-CHCL formulation exhibited superior performance, producing a more stable aromatic carbon structure, improved pore distribution, and a higher density of active sites in increased maximum adsorption capacity (6248.36 mg g-1) and consistently high sorption efficiency (≈70–92%) across concentrations. Additionally, compostchar application increased soil pH by 0.75, point of zero charge (PZC) 0.40, and EC by 0.13 dS m-1 compared to the control. These findings indicate a synergistic enhancement of physicochemical interactions between soil-ameliorant and glyphosate. Thus, the 80% CHCL + 20% biochar formulation is suggested as a successful method to enhance soil quality and pesticide retention. © 2026 The authors.
Department of Soil Science and Land Resources, Faculty of Agriculture, Andalas University, Padang City, 25164, Indonesia; Research Group of Food Safety, Research Center for Food Technology and Processing, National Research and Innovation Agency (BRIN), Yogyakarta, 55861, Indonesia; Faculty of Agriculture, Andalas University, Padang, 25164, Indonesia; Department of Agroecotechnology, Faculty of Agriculture, Andalas University, Dharmasraya, 27573, Indonesia; Department of Soil Science, Faculty of Agriculture, Syiah Kuala University, Banda Aceh, 23111, Indonesia
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