Effect of Various Rice Residue Decomposer on Nutrient Release Pattern from Treated Rice Residue in Light Textured Soil

The pot experiment was conducted to evaluate the nutrient release pattern from rice residue in the soil using 8 different decomposers in light textured soil of Western Indo-Gangetic plain for 90days incubation. The results ecluides that all the properties increased with incubating time except pH and soil organic carbon. However, among treatments, urea and Trichoderma treated residue revealed highest declining in the pH while Jivamrit and Trichoderma treated pots for EC after 90days of incubation. Higher the availability of substrate in untreated rice residue revealed highest organic carbon content. Among the nutrients, N resembled with urea treated residues while P, K, Fe, Mn and Cu revealed highest for vermicompost treated pot and Zn for Trichoderma treated pots. The lowest concentration of each nutrient was recorded for non-treated rice residue which might be due to reduced rate of mineralization and decomposition.