Assessment of physicochemical properties, manurial value and mineral composition of vermicompost prepared from poultry deep litter

Vermicompost Quality from Poultry Deep Litter

Abstract

This study was conducted to evaluate the physicochemical properties, manurial value, and mineral composition of vermicompost prepared from poultry deep litter and dry tree leaves. Poultry deep litter was used as the primary substrate, while dried leaves of Ashoka, Peepal, Semal, and Banyan trees were used as carbonaceous material to maintain an optimum C:N ratio of 25:1. Alkaline pretreatment using NaOH (0.2 mol/kg) was applied to enhance decomposition, and earthworms (Perionyx ceylanesis) were used for vermicomposting. The experiment was conducted for 90 days under controlled moisture and pH conditions. Significant changes (P<0.05) were observed in physicochemical parameters during vermicomposting, including reduction in pH, organic matter, crude fibre, and total carbon, along with an increase in total ash and dry matter. Manurial values such as potassium and calcium increased, while nitrogen and phosphorus showed a gradual decline. Mineral elements including zinc, manganese, and iron increased significantly (P<0.05) during the composting period. The results indicate that poultry deep litter combined with dry tree leaves can be efficiently converted into nutrient-rich vermicompost suitable for agricultural use.