Improving Qualitative Properties of Extruded Linsee d as Mixed with Different Absorbent Materials in Iran

Abstract

Limited data exist about the production of extruded linseed as a feed ingredient in farm animal nutrition. The objective of this study was t o produce and evaluate extruded linseed mixed with alfalfa hay, pistachio by-products, and sugar beet pulp or corn grain in different proportions of linseed: alfalfa hay: pist achio by-products at ratios of 70:15:15, 70:20:10, 70:10:20, and 80:10:10 for quality parame ters and in situ rumen Dry Matter (DM) degradability. Using a completely randomized d esign, the treatment containing alfalfa hay had higher Extrusion Effectiveness (EE) , Water Holding Capacity (WHC), and Angle of Repose (AR), but lower Oil Loss (OL) a nd Bulk Density (BD) than other treatments (P< 0.05). There were no differences amo ng extruded linseed products with different ratios of linseed: alfalfa: pistachio by- products for EE, WHC, and AR (P> 0.05). The treatment with an 80:10:10 ratio had the highes t OL among all treatments and the treatment with a 70:15:15 ratio had lower BD than t he others (P< 0.05). The DM degradability parameters of extruded products was a ffected by the absorbents and the treatment containing alfalfa hay had higher potenti al DM degradability than other treatments (P< 0.05). In conclusion, extruded treat ment with alfalfa hay had the highest EE, oil retention capacity and potential rumen DM d egradability compared to other treatments. In addition, extruded linseed product w ith an 80:10:10 ratio of linseed: alfalfa hay: pistachio by-products had higher OL than the o ther ratios. Keywords: Alfalfa, Fat absorption capacity, Pistachio by-products.