The potential of Pleurotus-treated olive mill solid waste as cattle feed |
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| Authors: | Ariel Shabtay Yitzhak Hadar Harel Eitam Arieh Brosh Alla Orlov Yaakov Tadmor Ido Izhaki Zohar Kerem |
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| Institution: | 1. Animal Nutrition Group, Department of Animal Sciences, Wageningen University, De Elst 1, 6708 WD Wageningen, The Netherlands;2. Plant Breeding, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, The Netherlands;1. Food Sciences Laboratory, Department of Biology, Faculty of Sciences – Semlalia, Cadi Ayyad University, P.O. Box: 2390, 40001 Marrakech, Morocco;2. Department of Biology, Faculty of Sciences – Semlalia, Cadi Ayyad University, P.O. Box: 2390, 40001 Marrakech, Morocco |
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| Abstract: | The aims of the current study were to follow: (1) the capability of the edible mushroom Pleurotus ostreatus to degrade cell wall components and soluble phenols of the olive mill solid waste (OMSW), and improve it for ruminant nutrition (2) the fate of oil and the lipid-soluble compounds tocopherols, squalene and β-sitosterol in the fermented OMSW. A significant decrease in oil and lipid-soluble compounds with a concomitant shift in the fatty acid profile and degradation of soluble phenols took place already after 14 d. The utilization of lipids by the fungus shifted the degradation of the structural carbohydrates to a later stage, and significantly reduced the metabolizable energy of the OMSW. We propose that edible fungi with reduced lipase activity would preserve the energy and health promoting ingredients of the oil, and force the fungus to degrade structural carbohydrates, thus improving its digestibility. |
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| Keywords: | Pleurotus ostreatus Olive mill solid waste Cattle nutrition Squalene Phenols |
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