Potentiality of Indigenous Earthworms (Perionyx excavatus, Perrier and Lampito mauritii, Kinberg) in Managing Lignocellulosic Wastes for Organic Farming

Resumo

The lignocellulosic wastes, cashew leaf litter (CLL) admixed with various animal dungscowdung (CD), sheepdung (SD) and horsedung (HD) have been subjected to vermicomposting by using indigenous earthworms, Perionyx excavatus and Lampito mauritii and to produce value added vermicompost. Four different combinations of each [100% dung alone, 3 : 1 (75% dung + 25% CLL), 2 : 2 (50% dung + 50% CLL) and 1 : 3 (25% dung + 75% CLL)] vermibeds were prepared for vermicomposting process. After 60 days, the vermicompost and worm-unworked normal compost were harvested and characterized and growth (biomass), reproductive performance of earthworms-cocoon production, hatchling number and recovery of vermicompost were also studied. The obtained results clearly showed that vermicompost from CLL admixed with CD at 2 : 2 ratio had lower pH, organic carbon, C–N ratio, C–P ratio, lignin, cellulose, hemicellulose and phenol content, and higher nitrogen, phosphorus, potassium, dehydrogenase and humic acid content than the raw substrates and normal compost. Also pronounced and better earthworm activity was found in the above combination for both species. Hence organic farming practices using vermicompost promise an alternative to the existing practices and proved as a sustainable approach.