Feeding value of poultry by-products extruded with cassava, barley, and wheat middlings for broiler chicks: the effect of ensiling poultry by-products as a preservation method prior to extrusion
1994
Patterson, P.H. | Acar, N. | Coleman, W.C.
In one experiment, six treatment diets including two levels of cassava meal, barley, or wheat middlings extruded with poultry by-products (PBP; a 3:1 ratio of broiler offal and condemned carcasses) were compared with a corn and soybean meal control diet for broiler performance from 1 d to 3 wk of age. No treatment differences in body weight (P > .05) were observed, and all chicks averaged 166, 421, and 788 g at 1, 2, and 3 wk of age, respectively. Weight gain and feed consumption were not affected by the experimental diets (P > .05). Birds fed the control diet had better overall feed conversion (1.24) than birds fed the diet containing 20% extruded barley and PBP (1.37) (P < .05). Feeding PBP extruded with cassava (10 and 20%) or barley (10%) resulted in equal broiler performance at less cost than birds fed the control diet. In a second experiment, 10% sucrose was mixed with PBP by weight and ensiled for 7 d at ambient temperatures in an anaerobic vessel. Diets containing cassava extruded with fresh and ensiled PBP (FR-PBP and EN-PBP, respectively) were compared with control diets (CON) for broilers to 6 wk of age. No differences in body weight were observed by 6 wk. Feed conversion of the CON birds was poorer than the birds fed the FR-PBP (P < .05). Chilled carcass yield was better for the CON compared with the EN-PBP treatment, however, dietary treatment had no effect on the percentage breast meat, thigh, drumstick, wing, or cage. These findings suggest that the extruded feeds resulted in equal live performance and parts yield compared with commercial broiler feeds. Feed costs were reduced as a result of using the extruded feeds and ensiling poultry by-products was a viable method of preservation before extrusion.
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