International Journal of Advanced Multidisciplinary Research and Studies
Volume 3, Issue 3, 2023
Effect of Composting on Substrate Quality, Mycelial Growth and Mushroom Yield: Case of Pleurotus Ostreatus Var 2175 Produced Respectively on Broken Cottonseed and Composted Grevillea Sawdust
Author(s): Nahimana Prosper Pacelis, Kiyuku Prosper, Nzigamasabo Aloys, Dr. Ir. Niyoyankana Bonaventure, Sindayikengera Severin
This research aims to improve the productivity of oyster mushrooms by improving the quality of the culture substrate given that contamination continues to be noticed despite the fact that pasteurization has been well conducted. The study took place in the food microbiology laboratory of the Faculty of Agronomy and Bioengineering and in the organic chemistry laboratory of the Faculty of Sciences at the University of Burundi. The main objective of our study was to highlight the effect of composting on the quality of the substrate, on mycelial growth and on the yield of fungi in the case of Pleurotus Ostreatus Var 2175 produced respectively on broken cotton seeds and composted Grevillea sawdust. The hypotheses posed were to see if the composting of the substrate makes it possible to create a selective medium which promotes the mycelial growth of the oyster mushrooms to the detriment of bacteria and competing and antagonistic moulds. Before the experiment, the substrate contained Bacteria, Rhizopus, Tricoderma, Aspergillus Flavus and Aspergillus Niger, but during composting we observed an elimination of these microorganisms. The results obtained proved that composting makes it possible to create a selective medium which favors the mycelial growth of oyster mushrooms to the detriment of competing and antagonistic bacteria and moulds. Nevertheless, it is preferable to supplement the substrate thus treated with nitrogen-rich supplements to readjust its C/N ratio since the latter deviates considerably from the value required for oyster mushrooms during composting.
Keywords: Substrat, Myciculture, Compostage, Pleurotes, Brisures, Moisissures
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