Utility of Biogas Sludge as Media for White Oyster Mushroom (Pleurotus florida)

Abstract

The aim of this research was to determine the effect of chicken manure in sludge biogas as substitute material for bran on oyster mushroom media to the productivity and to oyster mushroom produced. In each treatment, the media, biogas sludge, chicken manure, and mushroom produced were tested to define their chemical content, including water content, organic matter, crude fiber, organic C, total-N, total P, total K, C/N ratio, and microbiological test. The observed parameters included the time to start harvesting, fresh weight, number of mushroom caps, stem length, and diameter of the caps. The data was processed using the analysis of Variance-Completely Randomized Design Unidirectional and the average difference was tested using Duncan's Multiple Range Test (DMRT). The result of the chemical tests showed that the best quality of the media was obtained with 15% chicken manure addition as substitute for bran in biogas sludge (P4) with crude fiber content, organic-C level, P level, and K level were 15,14% , 49,1%, 0,54%, 77,56%, 1,42% and 0.94% respectively. The best results in biological test parameters such as age to start harvesting, fresh weight, stem length, diameter of caps, and number of caps were obtained in treatment P2 (50% bran and 50% sludge) because it could increase the fresh weight of the mushroom into 95,63 g. The results of proximate analysis showed that the quality of the oyster mushroom was most excellent in treatment P3 (25% bran and 75% sludge) because it could increase the level of water and organic materials into 82,86% and 79,60% respectively.