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KMID : 1025520110530030227
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Journal of Animal Science and Technology
2011 Volume.53 No. 3 p.227 ~ p.235
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Intestinal Growth and Development of Weanling Pigs in Response to Dietary Supplementation of Antibiotics, Phytogenic Products and Brewer's Yeast plus Bacillus Spores
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Lee C.-Young
Lim Jung-Won
Ko Young-Hyun
Kang Sun-Young
Park Man-Jong
Ko Tae-Gu
Lee Ji-Hoon
Young Hyun
Jeong Kyu-Sik
Jang In-Surk
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Abstract
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A total of 96 crossbred weanling barrows aged 21 days were randomly allocated to 32 pens of a new nursery to investigate the effects of antibiotics, phytogenics, and probiotics on intestinal growth and development. The animals were fed a set of three-phase basal diets containing 0.3% zinc oxide (CON) or the basal diets supplemented with 353 ppm of a combination of tiamulin, neomycin, chlortetracycline, and oxytetracycline (ANTI), 75 ppm triterpenoid saponin plus 150 ppm mixed saccharides (HERB; Sacchapin®), or 1 × 107 brewer’s yeasts plus 8 × 107 spores of each of Bacillus licheniformis and Bacillus subtilis per kilogram feed (PROBIO; Yeasture Plus 2B®) for five weeks. Thirty-two pigs representing as many pens were slaughtered at the end of the feeding trial, after which morphological measures and digestive enzyme activities of intestinal mucosa were determined. Weight gain and gain:feed of the pigs were not affected by the dietary treatments (TRT) during the overall feeding trial. Total intestinal length was greater in PROBIO than in ANTI (P<0.05). Wet mucosa weight of the duodenum was not affected by TRT. However, jejunal mucosa weight was greater in PROBIO than in any other group sum of mucosa weights of the duodenum and jejunum was greater (P<0.05) in PROBIO than in ANTI and HERB. The height and width of duodenal villus were not affected by TRT, but crypt depth decreased (P<0.05) in response to HERB and PROBIO vs CON. Specific activities of alkaline phosphatase, sucrase, maltase, lactase, and leucine aminopeptidase in the duodenum and jejunum were not changed by TRT. In conclusion, results suggest that the present dietary treatments have no effects on growth performance of weanling pigs and that of PROBIO enhances intestinal growth and development under a clean experimental setting.
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KEYWORD
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Weanling pig, Antibiotic, Herb extract, Probiotic, Intestine
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