Influence of Complexed Zinc Products on Live Performance and Carcass Grade of Broilers

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Abstract: Abstract Hess, J.B., Bilgili, S.F., Parson, A.M. and Downs, K.M. 2001. Influence of complexed zinc products on live performance and carcass grade of broilers. J. Appl. Anim. Res., 19: 49–60. The influence of supplementing diets with zinc (Zn) amino acid complexes on live performance and carcass quality of female (Experiment 1) and male broiler chickens (Experiment 2) was investigated. In Experiment 1, day-old female chicks were fed, under summer conditions, one of 4 dietary treatments: a control and diets supplemented with Zn (40 ppm) from Zn-methionine, Zn-lysine, or a commercial mixture of Zn-methionine and Zn-lysine. During the rearing period, body weight and feed conversion were measured. Randomly selected birds were processed with subsequent evaluation of foot pad lesions and carcass grades. In Experiment 2, male chicks were fed similar diets as Experiment 1, but under cool weather conditions. Live performance variables were measured and randomly selected- birds were processed to assess carcass defec...

Keywords: Broilers, bruising, Zinc complexes, live performance,