Bromatological characterization of pleurotus ostreatus grown in different residues from different banana cultivars

Abstract

The objective of this work was to evaluate the nutritional composition (raw protein, ether extract, raw fber, FDA, FDN and ash) of the POS 09/100 strain of Pleurotus ostreatus grown in three combinations of residues (pseudo-stem, leave and pseudo-stem + leaf) and four banana tree cultivars (Thap maeo, Prata anã, Pelipita and Caipira). The basidiomata harvested were submitted to dehydration in a forced ventilation stove with temperature adjusted to 40°C until reaching constant weight, being then grinded in a knife mill. The method proposed by Kjeldahl (1883) was used to determine total nitrogen. The Weende method (AOAC, 1997) was employed to determine crude fber, acid-detergent fber (ADF) and neutral detergent fber (NDF). According to the results obtained, crude protein, ash, ADF and NDF contents varied with the kind of residue and banana tree cultivar; the substrate prepared with leaves of banana tree (Prata Anã cultivar) yielded the highest crude protein (35.4%) and ash (6.7%) contents in the basidiomata of P. ostreatus; the substrate prepared with pseudo-stem of banana tree (Prata Anã cultivar) provided the highest ADF (31.6%) and NDF (41.9%) contents in the basidiomata of P. os - treatus. Ether extract and crude fber contents of P. ostreatus didn't vary in function of the treatments, with averages of 2.45 and 11.27%, respectively.