Reuse of degraded Pleurotus ostreatus (Jacq.) P. Kumm. substrate by supplementation with wheat bran. Quantitative parameters

Abstract

This research work was conducted in order to investigate the agronomic feasibility of Pleurotusostreatus by reusing spent substrates previously in crops of the same mushroom. After the physical and chemical characterization of the substrates, we have evaluated quantitative production parameters in one growing season. As base material, the experiment was arranged in wheat straw (WS) and spent Pleurotus substrate (SPS) to generate prepared substrates with the participation of the same, alone, and mixed in different proportions with wheat bran (WB). Unsupplemented SPS, supplemented SPS with 600 g of WB, mixture of WS + unsupplemented SPS, and mixture of WS + supplemented SPS with 600 g of WB, are prepared substrates with biological efficiencies (BE) ranging between 41 and 66% and an excellent unit weight of sporophores harvested. All correlations established among the germination index (GI), earliness (expressed as days to first harvest), yield components and BE were significant and positive correlation coefficients expressed.

Use of Spent Mushroom Substrate in New Mushroom Crops to Promote the Transition towards A Circular Economy

“…In Spain, the Mushroom Research, Experimentation and Services Center (CIES) has carried out different investigations on the reuse of a wheat straw-based substrate, previously used in growing cycles of P. ostreatus, in new production cycles of the same fungus (double-cropping) [48,[76][77][78][79][80][81]. For this, the effect of the addition of different enrichment materials, such as commercial supplements, wheat straw and wheat bran, as well as combinations with SMS of A. bisporus has been studied.…”

Formaldehyde-free bio-composites based on Pleurotus ostreatus substrate and corn straw waste

“…3). At a high temperature, the abundant protein in the P. ostreatus substrate (Buendía et al 2016) reacted with the abundant cellulose in the P. ostreatus substrate and corn stalk to form a hydrophobic ester, as evidenced by the FT-IR spectra of the bio-composites f3 to f7 (Fig. 5b).…”