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Information Journal Paper

Title

THE OPTIMUM ENERGY DENSITY IN DIETS FOR LORI‐BAKHTIARI LAMBS DURING A FATTENING PROGRAM

Pages

  595-599

Abstract

 Forty growing ram LAMBs (Lori-Bakhtiari breed) averaging 28 kg (±1.5) were allocated in this study to evaluate the optimal dietary energy density in a LAMB FATTENING enterprise in Iran. The feed intake (FI), body weight (BW), gain to feed ratio (G: F) and carcass characteristics were studied. Four treatments differed in metabolizable energy content (ME) as follow; 2, 2.3, 2.6 and 2.9 Mcal/kg for treatments 1 to 4, respectively. The study lasted 120 days and all the experimental LAMBs were slaughtered and carcass composition was compared among treatments. Average daily gains were 230, 252, 267 and 259 g/d for treatments 1 to 4, respectively (P<0.01). Moreover, lower energy density resulted in up to 19% greater FI (P<0.01) and higher F: G ratio (P<0.01) and therefore lower carcass growth efficiency (P<0.05). Higher energy density improved G: F ratio; but caused fatter carcasses compared to lower dietary energy levels. In addition to fatter carcasses for higher energy diets, the greatest tail-fat weight was observed for treatment 4 (2.9 Mcal/kg) and may explain the lower feed efficiency in this treatment. The values for LEAN MASS weights were 12.7, 14.1, 14.7 and 12.7 kg for treatments 1 to 4, respectively. Overall, the best carcass efficiency was found with treatment 3. Based on these results, energy density of 2.6 Mcal/kg may be recommended for growing Lori-Bakhtiari male LAMBs in a FATTENING enterprise under the conditions of this trial.

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    APA: Copy

    KAZEMI BONCHENARI, M., JAVANMARD, M.R., & ESLAMIZAD, M.. (2015). THE OPTIMUM ENERGY DENSITY IN DIETS FOR LORI?BAKHTIARI LAMBS DURING A FATTENING PROGRAM. IRANIAN JOURNAL OF APPLIED ANIMAL SCIENCE, 5(3), 595-599. SID. https://sid.ir/paper/682696/en

    Vancouver: Copy

    KAZEMI BONCHENARI M., JAVANMARD M.R., ESLAMIZAD M.. THE OPTIMUM ENERGY DENSITY IN DIETS FOR LORI?BAKHTIARI LAMBS DURING A FATTENING PROGRAM. IRANIAN JOURNAL OF APPLIED ANIMAL SCIENCE[Internet]. 2015;5(3):595-599. Available from: https://sid.ir/paper/682696/en

    IEEE: Copy

    M. KAZEMI BONCHENARI, M.R. JAVANMARD, and M. ESLAMIZAD, “THE OPTIMUM ENERGY DENSITY IN DIETS FOR LORI?BAKHTIARI LAMBS DURING A FATTENING PROGRAM,” IRANIAN JOURNAL OF APPLIED ANIMAL SCIENCE, vol. 5, no. 3, pp. 595–599, 2015, [Online]. Available: https://sid.ir/paper/682696/en

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