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http://dx.doi.org/10.5536/KJPS.2012.39.3.195

Growth Performance and Carcass Characteristics of Two Different Broiler Strains by Different Levels of Metabolizable Energy  

Kim, Jong-Seol (Animal Resources Research Center, College of Animal Bioscience and Technology, Konkuk University)
Kwon, Jung-Taek (Harim, Ltd.)
Kim, Je-Hun (Animal Resources Research Center, College of Animal Bioscience and Technology, Konkuk University)
Oh, Sung-Taek (Animal Resources Research Center, College of Animal Bioscience and Technology, Konkuk University)
Lee, Bo-Keun (Animal Resources Research Center, College of Animal Bioscience and Technology, Konkuk University)
Zheng, Lan (Animal Resources Research Center, College of Animal Bioscience and Technology, Konkuk University)
Jung, Moon-Sung (Harim, Ltd.)
An, Byoung-Ki (Animal Resources Research Center, College of Animal Bioscience and Technology, Konkuk University)
Kang, Chang-Won (Animal Resources Research Center, College of Animal Bioscience and Technology, Konkuk University)
Publication Information
Korean Journal of Poultry Science / v.39, no.3, 2012 , pp. 195-205 More about this Journal
Abstract
The objective of this study was to evaluate the effects of different levels of dietary ME on growth performance and carcass characteristics in two different strains of broiler chicken. A total of one thousand, 1-day-old A strain and R strain male chicks were randomly assigned into 8 treatments in a $2{\times}4$ factorial arrangement. They were fed iso-nitrogenic (CP 21%) crumbled diets formulated to contain metabolizable energy (ME) 2,950 to 3,250 kcal/kg in increment of 100 kcal/kg in the starter phase (1 to 21d) and iso-nitrogenic (CP 19%) pelleted diets containing same ME levels as in the finishing phase (22 to 38d). The body weight (BW) gain of chicks fed the lower ME diets (2,950 or 3,050 kcal/kg) were higher than those of the higher ME groups. The dietary energy level showed significant effects on feed intake and feed conversion rate (FCR) from 1 to 38 days of age (p<0.05). With the increment of dietary energy, feed intake tended to be reduced, whereas FCR was improved in the two strains of broiler chickens. The lowest FCR was observed at 3,250 kcal/kg diet groups in both of the two strains from 1 to 38 days of age. Feed intake and BW gain during 38 days were significantly affected by the strain factor. Increasing dietary energy up to 3,250 kcal/kg had no effect on the relative weights of breast meat and abdominal fat. The dietary energy and strains showed significant effects on the dressing percentage. There were no significant differences in various blood profiles except for GPT activity.
Keywords
broilers; energy; metabolizable energy; carcass characteristics;
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Times Cited By KSCI : 1  (Citation Analysis)
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