STUDIES ON THE MINERALIZATION OF P AND S FROM FOOD WASTES AND CONCENTRATED ORGANIC AMENDMENTS IN AEROBIC CONDITION UNDER LABORATORY INCUBATION

Abstract

For crops to meet their nutritional needs, fertilizers to be applied on time, and nutrient utilizat ion to be more efficient, it is essential to have a thorough understanding of the process by whi ch nutrients are liberated from manure or compost after being applied through mineralization. The current study was conducted in a laboratory under aerobic conditions to investigate the mineralization of P and S in concentrated organic amendments. The following treatments were in this experiment: T0 = Control, T1 = Tea waste, T2 = Banana peel, T3 = Eggshell, T4 = Mustard oil cake, T5 = Fishmeal, T6 = Biochar Enriched Organic Amendments at the rate of 10 ton per hectare. A standard procedure was used to evaluate the physiochemical characteristics of the available phosphorous (P) and sulfur (S), pH and EC. The study on mineralization using a standard procedure, the physiochemical characteristics of the available P and S, pH and EC were evaluated. In the laboratory, the mineralization study was conducted for 90 days at 25 °C in an aerobic environment. For available P, the T4 treatment showed the maximum values at day 01, 15, 45, 60, and 75 days (0.8836, 0.7141, 0.6188, 0.9725 and 3.492 mgg-1, respectively). In some cases, fishmeal also recorded the topmost value for available P. The control treatment gave the lowest value for available P. The result of the experiment shows that the maximum available S 0.0176, 0.022, 89.08, 0.1100, 0.1321 and 0.2268 mgg-1 were recorded from T4 treatment at day 15, 30, 45, 60, 75 and 90 respectively. In most of the cases, T5 gave the statistically alike result of the highest result. The T0 treatment gave the lowest value for available S. Throughout the study periods, the pH and EC varies between the treatments.