![]() The results of the present study indicate that biomass of water hyacinth weed can safely be used with rice straw (1:1) as the alternate substrate for the cultivation of Pleurotus species to reduce the cost of production of protein-rich oyster mushroom and to recycle the vast amount of nuisance weed in an eco-friendly way. Minerals (Fe, Cu, Zn) and toxic elements (Pb, Cd, As) though flow from the substrate of RS + WH (1:1) to the mushrooms do not accumulate at a toxic level. No significant differences are observed between the nutrient qualities of the oyster mushrooms that grow either on rice straw or on water hyacinth supplemented rice straw (1:1). The yield of mushrooms significantly increases with their 1:1 combination (RS + WH 1:1), especially in the first flush. To obtain a cost-effective production of oyster mushrooms, invasive aquatic weed water hyacinth has been tried out as a substrate in different combinations with rice straw (1:1, 1:2, 2:1) for the cultivation of Pleurotus species.
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