Physiochemical and microbial changes during organic liquid fertilizer preparation using animal and plant materials under anaerobic conditions

Abstract

The recycling of organic wastes from biological fermentation processes for agricultural production is a fast development of bioconversion strategy. Microbes play a major role on physiochemical changes during Organic Liquid Fertilizer (OLF) preparation. Hence, this study investigated the Physiochemical changes such as pH, EC,TDS , nutrient availability and microbial count..The OLF was produced prepared compost, banana peels, wild sunflower leaves, and goat manure at the rates of 80g:50g:80g:80g (w/w) respectively. Also, brown sugar (25g/l of water) was added as a fermenting agent. The anaerobic fermentation was allowed up to 30 days. The results significantly (P<0.05) showed that, maximum EC (9.93 dS/m), TDS (6200 mg/L), lower pH (4.6), higher total nitrogen (513.4 mg/L), and total phosphorous (588.19 mg/L) at 15 DAF than at 30 DAF. Anyhow, significantly higher total potassium (6.42 mg/L) was reported at 30 DAF than at 15 DAF. Further, the increased number of microbes did not significantly influence on physiochemical changes of OLF, but s bacteria (14.09±0.3), Actinomycets (16.1±0.2) and fungus count (11±0.3) were significantly increased at 30DAF. It is concluded that except for potassium level, parameters such as EC, pH, TDS, N, P and microbial performance were highly recorded at 15DAF. Hence, a short fermentation time period (15 Days) would be recommended to achieve the best physiochemical parameters during the OLF preparation.