Vol. 9, Issue 12, Part D (2025)

The present field study was conducted to evaluate the bioconversion of silkworm rearing waste into nutrient rich compost using various decomposers under farmer’s conditions through on farm testing during 2019-20 and 2020-21 in Kolar district, Karnataka. Four treatments were tested, and compost was analyzed after 90 days. Microbial inoculation significantly enhanced nutrient enrichment and biomass conversion. Organic carbon increased from 44.0% in T₁ to 51.0% in T₄, while total N rose from 1.24% to 1.99%, decreasing the C:N ratio from 26.52 to 23.94. The highest P and K were in T₃ (0.52% and 6.75%). Micronutrient enrichment peaked in T₄ (Zn 42.10 ppm, Cu 8.20 ppm, Fe 1742 ppm, Mn 158.30 ppm, B 24.60 ppm). Compost yield improved from 720 kg ton⁻¹ (T₁) to 940 kg ton⁻¹ (T₄), indicating superior biomass recovery. Results demonstrate that microbial consortia-based composting, particularly T₄, is effective for seri-waste valorization and sustainable nutrient recycling compare to T₁ (control).