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http://dx.doi.org/10.5536/KJPS.2009.36.1.057

Effects of Dietary Various Energy and Protein Levels on Productivity, Blood Composition and Meat Quality in Cross-Bred Chicks  

Jeong, Y.D. (School of Animal Science & Biotechnology, Chonbuk National University)
Youn, M.J. (School of Animal Science & Biotechnology, Chonbuk National University)
Ryu, M.S. (School of Animal Science & Biotechnology, Chonbuk National University)
Ryu, K.S. (School of Animal Science & Biotechnology, Chonbuk National University)
Publication Information
Korean Journal of Poultry Science / v.36, no.1, 2009 , pp. 57-67 More about this Journal
Abstract
These studies were conducted to investigate the various dietary CP and ME feeding effect on productivity, blood composition and meat quality in cross bred chicks. Seven hundred twenty one day old cross bred chicks (Hanhyup Samho) were alloted to the floor pen for early starting (0~2 weeks), starting (3~5 weeks), growing (6~8 weeks), finishing period (9~10 weeks). Dietary ME and CP were 3,000, 3,100 kcal/kg, and 22% for early starting period, 19, 20, 21% for starting period, 18, 19, 20% for growing period, 17, 18, 19% for finishing period. Weight gain and feed consumption were weekly measured and feed conversion ratios were calculated. Blood and breast meat were collected at the end of experiment. Birds fed ME 3,100 kcal/kg diets improved significantly compared with others for the first two weeks (P<0.05). Feed conversion was statistically improved in CP (22)21% treatment relative to that of CP (22)20% from three to five weeks of age. No difference were found from 6 to 8 weeks of age. Weight gain and feed conversion also improved in ME 3,100 kcal/kg treatments, but feed intake decreased significantly in CP ($22{\times}21{\times}20$)19% treatment for the rest of experimental period (P<0.05). There was interaction between ME and CP for the first five weeks (P<0.05). Blood total protein showed higher in ME 3,100 kcal/kcal treatment than ME 3,000 kcal/kg (P<0.05). There were no differences in albumin, total cholesterol and glucose, but CP ($22{\times}20{\times}19$)18 treatment showed higher glucose than other treatments (P<0.05). Cooking loss, tenderness and water holding capacity were not different. However, pH was dependent on dietary ME, CP and existing the interaction between ME and CP treatments (P<0.05). As the results of this experiment, ME and CP were confirmed the 3,000 kcal/kg, 22% for the first two weeks 3,100 kcal/kg, 21% from three to five weeks of age, 3,100 kcal/kg, 18% for the growing period, 3,100 kcal/kg, 17% for the rest of period. However, further research would be required to confirm more optimum dietary nutrition for cross bred chicks.
Keywords
cross bred chicks; performance; blood composition; meat quality; dietary CP and ME;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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