India, as an agro-based country, produces large quantities of sugarcane bagasse (SCB), the fibrous residue of the sugar industry, which presents significant waste management challenges. Vermicomposting has proven to be an environmentally friendly method to convert such agro-industrial wastes into valuable compost. This study assessed the effect of biochar applied at different concentrations (0-6%) on the co-vermicomposting of sugarcane bagasse and cow dung using Eudrilus eugeniae. Microbial population dynamics and the humification index were monitored as indicators of compost quality and maturity. The results showed that biochar amendments notably affected microbial density and enzymatic activity, with the 4% biochar treatment yielding the greatest enhancement. Furthermore, humification, measured by HI, was accelerated in biochar-amended composts, with a decline of up to 90%, indicating improved compost maturity and stability. These findings illustrate that adding biochar at suitable levels can enhance vermicomposting efficiency, nutrient bioavailability, and microbial performance. Overall, biochar-enriched vermicomposting offers a sustainable approach to valorise sugarcane bagasse and cow dung, providing an effective solution for organic waste management while producing high-quality compost suitable for agricultural use.
Keywords: Bagasse, Biochar, Humification index, Amendment, Eudrilus eugeniae
How to cite this article: K VK, Kumar AKK, R GK, Impact of Biochar Amendment on Microbial Biodiversity and Humification Index in Vermicomposting of Sugarcane Bagasse. Int J Drug Deliv Technol. 2026;16(2s): 185-191; DOI: 10.25258/ijddt.16.185-191