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http://dx.doi.org/10.5713/ajas.15.0426

Growth Performance, Relative Meat and Organ Weights, Cecal Microflora, and Blood Characteristics in Broiler Chickens Fed Diets Containing Different Nutrient Density with or without Essential Oils  

Kim, Sang-Jin (Laboratory of Poultry Science, Department of Animal Science and Technology, College of Animal Bioscience and Technology, Konkuk University)
Lee, Kyung-Woo (Laboratory of Poultry Science, Department of Animal Science and Technology, College of Animal Bioscience and Technology, Konkuk University)
Kang, Chang-Won (Laboratory of Poultry Science, Department of Animal Science and Technology, College of Animal Bioscience and Technology, Konkuk University)
An, Byoung-Ki (Laboratory of Poultry Science, Department of Animal Science and Technology, College of Animal Bioscience and Technology, Konkuk University)
Publication Information
Asian-Australasian Journal of Animal Sciences / v.29, no.4, 2016 , pp. 549-554 More about this Journal
Abstract
The present study was conducted to investigate whether dietary essential oils could affect growth performance, relative organ weights, cecal microflora, immune responses and blood profiles of broiler chickens fed on diets containing different nutrient densities. A total of eight hundred-forty 1-d-old male broiler chicks were randomly allotted into twenty-eight pens (7 pens per treatment, 30 chicks per pen). There were four experimental diets containing two different nutrient densities and supplemented with or without essential oils. Experimental period lasted for 35 days. No clear interaction between nutrient density and essential oils on any of growth performance-related parameters was observed. Live body weights were affected (p<0.05) by nutrient density at 21 days and by dietary essential oils at 35 days. Essential oils significantly (p<0.05) increased daily body weight gain and feed conversion ratio during the periods of 22 to 35 and 1 to 35 days, but failed to affect feed intake during the entire experimental period. Daily weight gain at 1 to 21 days and feed intake at 1 to 21 and 1 to 35 days were significantly impaired (p<0.05) by nutrient density. There were significant treatment interactions (p<0.05) on relative weights of bursa of Fabricius and abdominal fat contents. Finally, either essential oil or nutrient density did not influence the relative percentages of breast and leg meats, the population of cecal microflora, blood parameters and antibody titers against Newcastle disease and infectious bronchitis in broiler chickens. It was concluded that dietary essential oils, independent to nutrient density, failed to stimulate feed intake, but increased growth performance in broiler chickens.
Keywords
Growth Performance; Nutrient Density; Essential Oils; Broiler Chickens;
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