Performance and carcass quality of broiler chickens fed a corn-soybean meal diet containing graded barley levels without or with enzyme
Farran M.T. | Barbour G.W. | Usayran N.N. | Darwish A.H. | Machlab H.H. | Hruby M. | Ashkarian V. | Farran, M.T., Department of Animal Sciences, Faculty of Agricultural and Food Sciences, American University of Beirut, P.O. Box 11-0236, Riad El-Solh Rd., Beirut 1107-2020, Lebanon | Barbour, G.W., Lebanese Agricultural Research Institute, P.O. Box 287, Beqa'a, Lebanon | Usayran, N.N., Lebanese University, Animal Production Department, Beirut, Lebanon | Darwish, A.H., Lebanese Agricultural Research Institute, P.O. Box 287, Beqa'a, Lebanon | Machlab, H.H., Lebanese Agricultural Research Institute, P.O. Box 287, Beqa'a, Lebanon | Hruby, M., Danisco Animal Nutrition, 8362 Tamarack Village, Suite 119-200, Woodbury, MN 55125, United States | Ashkarian, V., Department of Animal Sciences, Faculty of Agricultural and Food Sciences, American University of Beirut, P.O. Box 11-0236, Riad El-Solh Rd., Beirut 1107-2020, Lebanon | Farran, M. T.; Department of Animal Sciences, Faculty of Agricultural and Food Sciences, American University of Beirut, P.O. Box 11-0236, Riad El-Solh Rd., Beirut 1107-2020, Lebanon; email: [email protected] | University: American University of Beirut; Faculty: Faculty of Agricultural and Food Sciences; Department: Animal and Veterinary Sciences; | Animal and Veterinary Sciences | [email protected] | Faculty of Agricultural and Food Sciences | Farran, MT | Barbour, GW | Usayran, NN | Darwish, AH | Machlab, HH | Hruby, M | Ashkarian, VM | Farran, MT (reprint author), Amer Univ Beirut, Fac Agr and Food Sci, Dept Anim Sci, POB 11-0236,Raid El Solh Rd, Beirut 11072020, Lebanon. | American University of Beirut
Three experiments were conducted to evaluate broiler chicken performance, ready-to-cook carcass value, and the size of cut-up parts of the left carcass section in response to feeding a corn-soybean meal diet containing graded levels of Litani (L 2), Pamir 35 (P 2), or Rihan 03 (R 6) barley without or with 0.1percent enzyme. In the first experiment, a diet containing 25percent L 2 or R 6 without or with enzyme was fed during the finisher period. Enzyme supplementation of the barley containing diets improved (Pandlt;0.01) broiler weight gain and feed conversion values. Enzyme containing diets supplemented with 0, 15, 30, and 45percent L 2, P 2, and R 6 were fed from hatch to 42d of age in the second experiment. There was a decrease (Pandlt;0.06) in cumulative performance with a concomitant increase (Pandlt;0.01) in abdominal fat pad yield when the level of barley was increased to 45percent. In the third experiment, diets containing 15, 20, 25, 30, and 35percent R 6 without or with enzyme were fed from hatch till market age. Enzyme addition improved feed conversion and increased abdominal fat pad yield whereas breast muscle and thigh yields were decreased when barley level exceeded 25percent (Pandlt;0.01). In conclusion, enzyme supplementation to barley diets improved efficiency of feed utilization but increased abdominal fat yield with no significant effect on breast muscle, thigh, and drum yields. The current findings indicate that levels up to 25percent of R 6 barley could be incorporated in diets up to market age without affecting broiler production parameters. © 2010 Japan Poultry Science Association.
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