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Effect of concentrate feeding sequence on equine hindgut fermentation parameters

Published online by Cambridge University Press:  08 December 2016

S. Sadet-Bourgeteau ,
C. Philippeau  and
V. Julliand
S. Sadet-Bourgeteau*
Affiliation:
AgroSup Dijon, URANIE, USC1335 Nutrition du cheval athlète, 26 Bd Docteur Petitjean, F-21079 Dijon, France
C. Philippeau
Affiliation:
AgroSup Dijon, URANIE, USC1335 Nutrition du cheval athlète, 26 Bd Docteur Petitjean, F-21079 Dijon, France
V. Julliand
Affiliation:
AgroSup Dijon, URANIE, USC1335 Nutrition du cheval athlète, 26 Bd Docteur Petitjean, F-21079 Dijon, France
*
†E-mail: [email protected]
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Abstract

Feeding a diet with a small amount of hay and a high proportion of concentrate given in large meals entails a risk of colic to horses as this can impact the hindgut microbial ecosystem. To counteract this potential negative effect, one feeding strategy is to modify the distribution sequence of concentrate and hay. The purpose of the present study was to assess the impact of feeding the concentrate meal before or with the hay meal on fermentative parameters postprandial variations in caecum and right ventral colon contents and faeces. We focused on the comparison of pH value and volatile fatty acid (VFA) concentrations between the three compartments. Four horses fitted with two cannulas in the caecum and right ventral colon were fed a 100% hay diet (H) for a 3-week period, and then a 40% concentrate–60% hay diet for two consecutive periods of 3 weeks each. Concentrate and hay were offered simultaneously in two equal meals at 0800 and 1700 h (HC1) during one period, or separately in two equal meals at 0800 and 1600 h for the concentrate and at 1000 and 1730 h for hay (HC2) during the second one. During the 2nd week of each diet period (H, HC1, HC2), caecal, right ventral colonic and faecal samples were collected before (0) and at 2, 4, 6 and 8 h after the morning meal. pH values and VFA concentrations were measured. Adding concentrate to the hay was associated with a decrease of pH value in the caecum, right ventral colon and faeces and an increase of faecal VFA concentrations (P<0.01). An impact of the concentrate feeding sequence was observed on caecal pH and faecal propionate concentration (P<0.001) but none on the other parameters investigated. In the caecum and right ventral colon, pH values decreased and VFA concentrations increased within the range of 4 to 8 h after the morning meal. Our data suggested that the variation of faecal pH could be an indicator of those of the caecal and right ventral colonic pH with a delay of 2 h. The present study showed that hay and commercial pelleted could be safely distributed simultaneously, thus making easier every day horse feeding.

Keywords

concentrate feeding sequencefermentative parametershindguthorsepostprandial evolution
Type
Research Article
Information
animal , Volume 11 , Issue 7 , July 2017 , pp. 1146 - 1152
Copyright
© The Animal Consortium 2016 

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