NL Journal of Agriculture and Biotechnology
(ISSN: 3048-9679)

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Ecotoxicological Assessment of Nanomaterials Used in Agriculture: Impacts on Soil Microorganisms and Non-Target Species

Author(s) : Dr. Pooja R*.
DOI : 10.71168/NAB.03.02.148

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Abstract

The Rapid Integration of Engineered Nanomaterials (ENMs) into agricultural practices particularly as nano-fertilizers, nano-pesticides, and soil amendments has raised critical concerns regarding their unintended ecotoxicological consequences. While nanotechnology offers substantial agronomic benefits, comprehensive understanding of its impacts on soil microorganisms and non-target species remains limited. This study systematically evaluates the ecotoxicological effects of agriculturally applied nanomaterials on soil microbial communities and representative non-target organisms across multiple trophic levels. Using a combination of standardized ecotoxicity assays, soil enzyme activity profiling, microbial diversity analyses, and organism-level bioassays, the effects of commonly used nanomaterials, including metal-based, metal oxide, and carbon-based nanoparticles, were assessed. Results indicate that ENM exposure can significantly alter soil microbial biomass, enzymatic activities, and community structure, primarily through mechanisms involving oxidative stress, membrane disruption, and altered nutrient cycling. Non-target organisms such as earthworms, beneficial arthropods, and soil microfauna exhibited dose-dependent physiological and behavioral responses, highlighting potential risks to ecosystem functioning. Importantly, the magnitude of ecotoxicological effects was strongly influenced by nanoparticle physicochemical properties, application rates, soil characteristics, and exposure duration. This study underscores the necessity for integrative, multi-scale risk assessment frameworks that bridge laboratory findings with field-level realities. The findings contribute critical insights toward the development of safer nano-enabled agricultural inputs and inform regulatory strategies aimed at minimizing ecological risks while sustaining agricultural productivity. Keywords: Agricultural nanomaterials, Ecotoxicology, Soil microorganisms, Non-target species, Environmental risk assessment.

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