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KMID : 1025520000420060849
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Journal of Animal Science and Technology
2000 Volume.42 No. 6 p.849 ~ p.858
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Effects of Dietary Supplementation of Probiotics(MS102R) on Performance , Blood Cholesterol Level , Size of Small Intestine and Intestinal Microflora in Broiler Chicks
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김문수/Kim, M. S.
강창원/김용란/안병기/Kang, C. W./Kim, Y. R./Ahn, B. K.
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Abstract
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A study was conducted to investigate the effect of dietary supplementation of multiple probiotics (MS^(102)) obtained from local soil on growth performance, blood cholesterol level, size of small intestine and intestinal microflora in broiler chicks. A total of 240 broiler chick(3 d old, Ross x Ross) were randomly divided into 12 groups and assigned to four dietary treatments, which were a basal diet containing 0.1% salinomycin and 0.05% Zn-bacitracin and three non-medicated diets containing 0.1. 0.3, or 0.5% MS^(102). The bird were fed ad libitum from 3 to 28 d of age. Average daily gain(ADG), average daily feed intake(ADFI), feed conversion rate(FCR) and body composition as % of body weight(BW) were determined at 21 and 28 d of age. The length and weight of small intestine, blood cholesterol level and intestinal microflora were measured at 28 d of age. The chick fed starter diet containing 0.1 or 0.3% MS^(102)(3 to 21 d of age) showed significantly improved ADG and FCR(P$lt;0.05) compared to those of the other groups during the first stage of experimental period(3 to 21 d of age). During the later stage(21 to 28 d of age), ADG and FCR of birds fed non-medicated probiotics diet were not significantly different from those fed medicated basal diet. Abdominal fat(%BW) of the bird fed the MS^(102) supplemented diets were significantly lower(P$lt;0.05) than that of the control group. The body composition(%BW) of liver, breast and leg muscles were not significantly different among treatments. Dietary MS^(102) supplementation resulted in a significantly increased relative size of small intestine measured as % per 100 g BW(P$lt;0.05). Blood cholesterol levels of broiler chicks fed MS^(102) diets were significantly lower(P $lt; 0.05) than that of the control. Total number of cecal microbes and lactic acid bacteria were not significantly different among treatments. However, cecal Coliforms sp. counts of birds fed 0.1%, 0.3% and 0.5% MS^(102) diets were significantly reduced(P $lt; 0.05) compared to those of medicated control group. These results indicate that locally obtained multiple probiotics MS^(102) can be effectively used as a growth promoting agent for non-medicated broiler diet.
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