Chemical characterization and in vitro digestibility of Amazonian seeds and agro-industrial by-products with potential for animal feed

The chemical characteristics and in vitro digestibility of eleven inputs, divided intothree groups were determined: seeds (sacha inchi [(Plukenetia volubilis], castor [Ricinuscommunis] and chia [Salvia hispanica]), by-products derived from rice (nielen, husk andpowder) and agro-industrial residues of tropical plants and fruits (sugarcane bagasse,coffee pulp, outer shell and mucilage of cocoa [Theobroma cacao], orange pulp [Citrussinensis] and bean pod [Caesalpinia spinosa]) with potential in animal feed. The sampleswere collected in the Amazon region, Peru. Its proximal composition, crude fibre content(FC), neutral detergent fibre (NDF), acid detergent fibre (ADF), calcium and phosphorus,as well as in vitro digestibility and gross energy (EB) were determined. Oilseeds stoodout for their high oil content, high energy value and an important source of calcium andphosphorus; sacha inchi presented high protein content of 28.75 +/- 0.29%. Rice by-products were shown to be important sources of carbohydrates, with high digestibilityexcept for the husk. The latter, like the residues of sugar cane and cocoa, showed a highcontent of FC, FDA and NDF. Among the other agro-industrial residues, the coffee pulppresented higher protein content with 9.7%; orange and bean residues have highercalcium values (between 0.5 and 0.7%), phosphorus (between 0.3 and 0.5%) and highdigestibility (between 93 and 95%). Therefore, the evaluated inputs, due to their chemicalcomposition, low cost and bioavailability, show potential for animal feed