Comparative analysis of the productivity of two edible mushrooms (pleurotus eous and pleurotus ostreatus) on turf substrate (festuca ovina) in the haut-sassandra region (Côte d'Ivoire)

The use of various techniques for waste recovery in order to obtain value-added products is one of the objectives of sustainable development. One of the best ways to recover agricultural waste is to use it in mushroom cultivation. The objective of this study was to determine the colonisation and fruiting capacity of Pleurotus eous and Pleurotus ostreatus, cultivated on substrates based on grass clippings (Festucas ovina) and sawdust (control). The grass clippings were cut and dried in the sun for two weeks, then cut into pieces (2-3 cm). Agricultural lime and rice bran were added in varying proportions (1% agricultural lime and 0-15% rice bran) to obtain several formulations. These mixtures were then moistened (50-60% moisture content). The sawdust substrate consisted of 97% sawdust, 1% agricultural lime and 2% rice bran. This mixture was moistened to 85% moisture content and composted for two months. These different substrates were placed in heat-resistant bags and pasteurised for 2 hours and 30 minutes in a barrel. After cooling, the substrates were inoculated with P. eous and P. ostreatus mycelium. The parameters measured were mycelial growth and carpophore fruiting. The results show that both mushroom species completely colonise the sawdust substrate after 30 to 35 days. However, colonisation remains partial on the grass substrate after 50 to 60 days. In Pleurotus eous, production on the grass substrate varied from 4,199 to 5,268 g, compared to 1724 g for the sawdust substrate. The highest production was obtained with substrate F2, with a biological efficiency of 42%. In Pleurotus ostreatus, production varied from 1622 to 1936 g on the grass substrates, compared to 2625 g for the control. The highest yield was obtained on the turf formulations, with F2 producing 1936 g. Analysis of variance showed that the turf formulations had a significant effect on the fresh weight and diameter of the fruiting bodies. Disseminating these results to farmers is a way of adding value to agricultural waste and increasing their income.