Enhancing soil health and crop productivity: the role of zinc-solubilizing bacteria in sustainable agriculture

Zinc is essential for various plant physiological functions, including enzyme activation, protein synthesis, and stress resistance. However, nearly half of the world’s arable soils are zinc-deficient, adversely affecting crop productivity and human health, especially in regions reliant on plant-based diets. Traditional zinc supplementation methods, such as chemical fertilizers, often fall short due to environmental and economic limitations. This study highlights Zinc solubilizing bacteria (ZSB) as a sustainable alternative, capable of converting insoluble zinc into bioavailable forms through mechanisms like organic acid production, chelation, and siderophore activity, thus enhancing plant zinc uptake. These bacteria also contribute to soil health by improving microbial diversity, enzyme activity, and soil structure, promoting nutrient cycling and supporting plant growth. Field studies demonstrate that ZSB inoculation increases crop yields, enhances plant health, and improves the nutritional quality of produce. The integration of ZSB into biofertilizer formulations further highlights their role in sustainable agriculture by reducing dependence on chemical fertilizers. This study emphasizes the need for advanced research into next-generation technologies like genomic engineering, nano-formulations, and precision agriculture to enhance the efficacy and adoption of ZSB. Despite their promise, challenges such as storage, field performance variability, and regulatory hurdles limit widespread adoption. Ultimately, the use of ZSB offers a promising pathway to address global challenges of zinc deficiency, soil health, and food security, contributing to sustainable agricultural practices. Future research should focus on optimizing ZSB formulations, developing robust strains, and integrating ZSB with precision agriculture. Hence this study concludes that ZSB-based biofertilizers offer a valuable, eco-friendly solution to zinc deficiency, promoting sustainable agriculture and contributing to global food security and soil health.

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