Mechanism of Redox Reaction in Soil Chemistry

Author: Abirami R., S. Jothimani and D. Leninraja

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Abstract

Soil chemical reactions involve both oxidation and reduction reactions, which together are called redox reactions. Soil pH mainly controls the redox reaction process. Another indicator of a redox reaction is redox potential. The relationship between soil pH and Eh is based on soil condition; acid soil raises pH due to a decrease in redox potential, whereas alkaline soils are antithetical. The changes in these reactions in soil interrupt the presence of microorganisms and their growth development. Some microorganisms require oxidized elements for their survival, and the enzymatic action of microorganisms may adversely affect the redox reaction. The transformation of the elements and the availability of nutrients in soil are also influenced by redox reactions. This paper mainly reviews the redox reaction in various aspects that are connected to pH relations, the response of microorganisms, its effect on soil fertility, nutrient availability, plant growth, and the response of plants due to the redox reaction, which are all positioned in the existing documents. Need more investigation to determine the individual factors contribution.

Keywords

Redox reaction, relations between pH and Eh, nutrient status, plant response to Eh, microorganism response to Eh

Conclusion

The oxidation and reduction of the soil are major factors that influence nutrient availability, which directly affects plant survival, growth, and productivity (Pezeshki and DeLaune 2012). The presence or absence of soil microbes is determined by oxidation and reduction potential. The redox potential is greater than 100 mV (moderately reduced and oxidized), offering the microbes oxidation and reduction status of soil, whereas the redox reaction is less than 100 mV (reduced and highly reduced soil). The effect of soil texture is not significant and reduces oxidation and reduction status (Olufemi Gabriel Dayo-Olagbende, 2020). In soils with low organic matter, slowing down the reduction process results in less benefit in terms of soil fertility under submerged conditions (Sahrawat 1998; Narteh and Sahrawat 1999, 2000). Soil pH was greatly altered the soil condition due to the result of oxidation and reduction reaction. The oxidation process tends pH towards acidity or alkalinity; however, the reduction process tends pH towards a neutral condition (Dayo-Olagbende et al., 2022).

References

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How to cite this article

Abirami R., S. Jothimani and D. Leninraja (2023). Mechanism of Redox Reaction in Soil Chemistry. Biological Forum – An International Journal, 15(10): 1317-1321.