Digestion of cereals in the equine gastrointestinal tract measured by the mobile bag technique on caecally cannulated horses

Rosenfeld, Irene; Austbø, D.

doi:10.1016/j.anifeedsci.2008.09.002

Cited by 31 publications

(35 citation statements)

References 22 publications

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“…The range in the recommendation for the upper level of starch per meal reported in the literature probably results from variation in the extent of pre-caecal starch digestibility, which largely depends on starch sources (De Fombelle et al, 2004;Rosenfeld and Austbo, 2009;Hymoller et al, 2012) and physicochemical forms of cereal grains (Rosenfeld and Austbo, 2009;Hymoller et al, 2012). Using the same batch of barley, a greater mobile bag pre-caecal starch disappearance was found for ground, pelleted or steam-flaked forms than for whole grain (Philippeau et al, 2014).…”

Section: Introductionmentioning

confidence: 71%

Impact of barley form on equine total tract fibre digestibility and colonic microbiota

Philippeau

Sadet-Bourgeteau

Varloud³

et al. 2015

Animal

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This study aimed at assessing the impact of four barley forms on total tract apparent digestibility of dietary fibre in horses fed a large amount of starch in the morning meal (0.27% BW). Processed barley forms had a greater pre-caecal starch digestibility than the whole form. Based on this result, we hypothesised that using barley-processing methods would limit the potential dumping of undegraded starch in the hindgut of horses and, consequently, the potential negative effect on fibre degradation in the hindgut. In a 4 × 4 latin square design, four mature geldings fitted with a right ventral colon-fistula were fed a meadow hay : concentrate (62 : 38; dry matter (DM) basis) diet at 1.7% BW. The concentrate was made of 80% barley distributed either as whole grain or as processed forms: 2.5 mm ground, pelleted or steam-flaked. For each period, total tract apparent digestibilities of DM, NDF and ADF were determined over 3 consecutive days by total faecal collection, whereas pH, volatile fatty acids (VFA) concentrations and cultural functional bacteria counts (total anaerobic, cellulolytic bacteria, lactic acid producers, amylolytic bacteria and lactic acid utilisers) in colonic content were evaluated on 1 day 4 h after the morning meal. Total tract apparent digestibility of DM and dietary fibre was influenced ( P < 0.05) by barley form. Diets including thermo-mechanically treated barley forms led to a higher ( P < 0.05) total tract apparent digestibility of NDF than those constituted of ground barley and also led to a greater ( P < 0.05) total tract apparent digestibility of ADF than those made of whole or ground barley forms. However, no significant difference was observed in colonic pH, VFA concentrations and cultural bacteria concentrations. Owing to a high starch supply in the morning meal, the concentration of the functional bacteria in the colonic content averaged 7.8 log CFU/ml, 5.9 NPM/ml, 6.9 and 7.3 CFU/ml for total anaerobic, cellulolytic, amylolytic and lactic acid-utilising bacteria, respectively. Consequently, providing horses with pelleted or steam-flaked instead of ground barley forms may limit the negative impact of starch on fibre digestibility in horses fed a high level of starch in the morning meal (0.27% BW). Moreover, the fibre-to-starch ratio fed in this experiment did not cause any digestive upset.

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Section: Introductionmentioning

confidence: 71%

Impact of barley form on equine total tract fibre digestibility and colonic microbiota

Philippeau

Sadet-Bourgeteau

Varloud³

et al. 2015

Animal

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“…Furthermore, grain diets result in uniform particle sizes in the swallowed boli in contrast to fibrous diets (Meyer et al, 1986), hence the milling treatment appeared to simulate the chewing of grain fed horses with healthy teeth (Rosenfeld and Austbø, 2009). On the other hand it has been observed that hasty eaters do not chew their feed as thoroughly as more slow eating horses (Meyer et al, 1995) and that their hasty chewing action results in larger particle sizes and less uniform particle size distribution of the digesta (Meyer et al, 1995), hence the blended samples mimicked the chewed grain of hasty eaters or horses with neglected teeth well.…”

Section: Modelled Chewing Actionsmentioning

confidence: 97%

Cereal starch, protein, and fatty acid pre-caecal disappearance is affected by both feed technological treatment and efficiency of the chewing action in horses

et al. 2012

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“…This difference is due to the way the bags are collected; for the authors mentioned, it was done with the collection of feces in collector bags that were emptied three times a day, while in this study the bags were collected immediately after excretion, 24 hours a day, during the experimental period. Rosenfeld & Austbø (2009) recovered about 61% of the bags in the feces 72 h after gastric insertion. De Fombele et.…”

Section: Resultsmentioning

confidence: 99%

Roughage digestion evaluation in horses with total feces collection and mobile nylon bags

et al. 2012

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-This study aimed to evaluate the nutrient digestibility of roughages in horses with total feces collection and mobile bags. Two trials were carried out simultaneously. The first trial evaluated the digestibility of nutrients of coastcross hay (Cynodon dactylon cv. coastcross) with total feces collection. The second trial assessed the digestibility of nutrients of alfalfa hay (Medicago sativa), peanut (Arachis pintoi) and coastcross hay with mobile bags. This trial was conducted with gastric insertions of nylon bags every 12 hours, and each bag contained 663 mg of feed samples in a proportion of 17 mg DM/cm 2 .Feces and bags were collected directly from the stall floor immediately after excretion. There was no difference between the digestibility of dry matter, crude protein, carbohydrates and hydrolysable carbohydrates of coastcross hay estimated with feces collection and mobile bags. Forage peanut showed high nutrients digestibility, with values close to those observed with alfalfa, indicating potential for use in diets for horses.

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Digestion of cereals in the equine gastrointestinal tract measured by the mobile bag technique on caecally cannulated horses

Cited by 31 publications

References 22 publications

Impact of barley form on equine total tract fibre digestibility and colonic microbiota

Impact of barley form on equine total tract fibre digestibility and colonic microbiota

Cereal starch, protein, and fatty acid pre-caecal disappearance is affected by both feed technological treatment and efficiency of the chewing action in horses

Roughage digestion evaluation in horses with total feces collection and mobile nylon bags

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