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http://dx.doi.org/10.5187/JAST.2010.52.2.111

The Effects of Different Feeding Levels on the Number of Fecal Lactic Acid-producing Bacteria and Fecal pH in Horses  

Lee, Chong-Eon (National Institute of Animal Science, RDA)
Kim, Nam-Young (National Institute of Animal Science, RDA)
Park, Nam-Geon (National Institute of Animal Science, RDA)
Oh, Woon-Young (National Institute of Animal Science, RDA)
Cheong, Ha-Yeun (National Institute of Animal Science, RDA)
Joa, Jae-Ho (National Institute of Horticultural & Herbal Science, RDA)
Publication Information
Journal of Animal Science and Technology / v.52, no.2, 2010 , pp. 111-116 More about this Journal
Abstract
This study was conducted to determine the effects of different feeding levels on the number of fecal lactic acid-producing bacteria and fecal pH in horses. In Exp. 1, 6 female cross-bred horses ($332.4{\pm}50.4\;kg$, 5 year old) were fed 2% hay or 2% concentrates of BW for 30 d, and the number of fecal Lactobacilli and Streptococci was measured. For Exp. 2, 5 castrated Thoroughbred ($474.5{\pm}64.6kg$, 4 year old) and 5 female cross-bred horses ($343.6{\pm}56.3\;kg$, 5 year old) were allotted to high- or low-concentrates diets (5 levels) for 30 d in a $5{\times}5$ Latin square design, and the fecal pH was assessed. In Exp. 3, 3 castrated Thoroughbred ($482.6{\pm}53.3\;kg$, 4 year old) were fed high- or low-alfalfa hay diets (3 levels) for 30 d in a $3{\times}3$ Latin square design, and the fecal pH was measured. Feeding high-concentrates diets increased (P<0.05) the number of fecal lactic acid-producing bacteria (Lactobacilli and Streptococci) and decreased (P<0.01) the fecal pH. Feeding alfalfa hay with high-concentrates diet (2% alfalfa hay + 1% concentrates of BW) decreased (P<0.01) the fecal pH. These results showed that feeding high-concentrates diets increased lactic acid-producing bacteria in the large intestine and decreased the intestinal or fecal pH causing colic or laminitis, indicating that the proper fiber/concentrates (1:1) should be maintained in horses.
Keywords
Horse; Feeding system; Lactic acid; Feces; pH;
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