The composition of the fresh by-products is presented in Table 1
their in vitro DM digestibility in Table 2, and their in vitro organic matter (OM) and NDF digestibility in Table 7.
Aspergillus residue, okara, pomegranate pulp and avocado pulp were characterized by low DM content (161–200 g DM/kg fresh material) whereas grape pulp was drier (Table 1).
Ash content was low for all by-products. CP content was very high in okara and lower in the other by-products. Ether extract content wasvery high in avocado pulp, intermediate in grape pulp and lower in the other by-products. All by-products contained a high proportion of NDF and its composition varied according to the by-product.
In okara, hemicellulose content was higher thancellulose content, whereas in Aspergillus residue and avocado pulp, cellulose content was higher than that of hemicellulose.Grape pulp and avocado pulp contained high levels of lignin, pomegranate pulp had an intermediate level of lignin but ahigh level of soluble phenolics, and Aspergillus residue and okara were low in lignin and soluble phenolics.Aspergillus residue and okara were characterized by high in vitro digestibility of OM and NDF. Pomegranate pulp was characterized by intermediate in vitro digestibility of OM and low digestibility of NDF. Grape pulp and avocado pulp had thelowest in vitro digestibility of OM and of NDF (Table 7).