Abstract
Abstract Lentinula edodes mushrooms were produced by solid-state fermentation, using as substrates different mixtures of wheat straw (WS), corn-cobs (CC), and oak-wood sawdust (OS). Studies were conducted for evaluating their bio-transformation efficiency with respect to substrate colonization, time of sporophore production, biological efficiency, and mushroom nitrogen content, as well as basidiocarp number and size. First, the potential of residue-substrates to support early fructification was evaluated in glass-tubes. The mushrooms appeared 50–60 days after inoculation, with WS and CC promoting earlier sporophore initiation than did OS. A second experiment, where L. edodes mushrooms were cultivated in ‘bag-logs’, revealed high productivity on CC and high mushroom protein content on OS-based substrates. However, WS appeared to promote early fructification and mushroom quality. Finally, mushroom production characteristics in tubes and bags were correlated with nitrogen content and C/N ratio of substrates. Early fructification was positively related to nitrogen content. Substrate mixtures with lower C/N ratio favoured earlier sporophore induction.
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