The Effects of L-Carnitine and Different Levels of Animal Fat on Performance, Carcass Characteristics, some Blood Parameters and Immune Response in Broiler Chicks

Iranian Journal of Applied Animal Science

مقاله 16، دوره 4، شماره 3، آذر 2014، صفحه 561-566   

نوع مقاله: Research/Original Article

نویسندگان

K. Parsaeimehr^{* 1}؛ M. Afrouziyeh²؛ S. Hoseinzadeh²

¹Department of Animal Science, College of Agricultural Science, Urmia University, Urmia, Iran

²Department of Animal Science, Tabriz Branch, Islamic Azad University, Tabriz, Iran

چکیده

This study was conducted to investigate the effects of L-carnitine and different levels of animal fat on performance, carcass characteristics and some blood parameters of broiler chickens. Two hundred one-day old male broiler chicks were allotted to5 treatments in 4 replicates and 10 birds in each replicate. Dietary treatments consisted of: 1) diet with 5% vegetable oil (T1), 2) diet with 5% vegetable oil + 300 mg/kg L-carnitine (T2), 3) diet with 4% animal fat + 300 mg/kg L-carnitine (T3), 4) diet with 5% animal fat + 300 mg/kg L-carnitine (T4) and 5) diet with 6% animal fat + 300 mg/kg L-carnitine (T5). The dietary treatments had not significant effect on body weight gain in days 1-21 (P>0.05). The body weight of chicks fed T4 diet was increased in days 22-42 and whole period of the experiment (P<0.05). The diet with L-carnitine and 5% animal fat had a significant effect on feed conversion ratio (P<0.05). L-carnitine increased both thigh meat (P<0.05) and breast muscle percentages (P<0.01). The diets T3 and T4 reduced abdominal fat percentage (P<0.05). Diet T4 had a significant effect on fabricious bursa weight (P<0.05). The T3 and T5 diets had a significant effect on spleen weight (P<0.05). The diets with L-carnitine had a significant effect on heart weight (P<0.05). The results showed that adding L-carnitine in diet had no significant effect on blood parameters (P>0.05). Adding L-carnitine had a significant effect on Newcastle disease antibody titer at day 32 (P<0.05) but it had no significant effect on Newcastle disease antibody titer at day 42 (P>0.05).

کلیدواژه‌ها

animal fat؛ blood metabolites؛ broiler performance؛ immune response؛ L-carnitine

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