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

말에서 사료 급여 수준이 분 젖산 생산 박테리아 및 pH 변화에 미치는 영향

  • 이종언 (농촌진흥청 국립축산과학원) ;
  • 김남영 (농촌진흥청 국립축산과학원) ;
  • 박남건 (농촌진흥청 국립축산과학원) ;
  • 오운용 (농촌진흥청 국립축산과학원) ;
  • 정하연 (농촌진흥청 국립축산과학원) ;
  • 좌재호 (국립원예특작과학원)
  • Received : 2010.01.07
  • Accepted : 2010.03.22
  • Published : 2010.04.30

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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