Bioconversion of agroindustrial residues by Pleurotus ostreatus cultivation
DOI:
https://doi.org/10.33885/sf.2005.3.938Keywords:
Pleurotus ostreatus, fresh substrates, residues, nutrient availability, digestibilityAbstract
Bioconversion of rice straw (Oriza sativa), coffee pulp (Coffea arabica) and banana
leaves (Musa sapiensis) after Pleurotus ostreatus cultivation was evaluated. Nutrient
availability and digestibility assays were performed both in fresh substrates and residues.
Changes within substrates were analyzed through t (student) paired tests. Coffee pulp
showed a decrease in lignin, cellulose, organic cell wall and low digestibility fractions
(P<0.05); an increase in the C/L ratio, organic cell content and IVDMD but no change on the
available protein, hemicellulose and high digestibility fraction. For banana leaves, available
protein, lignin, cellulose hemicellulose, organic cell wall contents and the low digestibility
fraction decreased (P<0.05); organic cell content and the high digestibility fraction showed a
significant increase; C/L ratio and IVDMD showed no change. A decrease in the available
protein, organic cell wall and low digestibility fraction was observed for rice straw (P<0.05).
Organic cell content and the high digestibility fraction exhibited a significant increase.The
rest of the response variables had no change on this substrate. Lignin reduction indicated a
positive bioconversion effect over coffee pulp and banana leaves. Changes in organic cell
contents, organic cell wall and low digestibility fraction indicated a positive bioconversion
effect for all substrates.
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