In situ and mobile bag methodology to measure the degradation profile of processed feeds in different segments of the equine digestive tract

Hyslop, J. J.

doi:10.1016/j.livprodsci.2005.11.007

Cited by 10 publications

(9 citation statements)

References 21 publications

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“…Hyslop (2006) reviewed the mobile bags technique associated to horse degradation models and showed that effective neutral detergent fiber degradation of lucerne bags inserted in the caecum and recovered in the feces varied from 20 to 40%, while lucerne hay neutral detergent fiber varied from 14 to 40%, close values to those observed in the present study for the maximum degradation time. In horses, according to digestive tract disposition, protein digestion is initially enzymatic and occurs in the small intestine followed by fermentative digestion in the large intestine (NRC, 2007).…”

Section: Resultssupporting

confidence: 79%

“…Moore-Colyer et al (2002) observed in ponies that effective caecal degradation of grass dry matter at 40 and 60 hours of incubation reached values of 43.1 and 47.9%, respectively, while Hyslop (2006) observed 47 to 67% grass dry matter degradation.…”

Section: Resultsmentioning

confidence: 99%

“…Three or four bags were placed in the caecum at every incubation time, beginning always at 9 a.m.. The bags were incubated according to Hyslop (2006), for 0, 2, 4, 6, 12, 24 and 48 hours.…”

Section: Methodsmentioning

confidence: 99%

“…The knowledge of horse nutrition has followed the feed evaluation techniques applied to other species (Hyslop et al, 2006). The in situ technique was first developed for swine, applied to ruminants, and then methodological adaptation for horses allowed assessment of the dynamic of feed degradation at segments of the horse's gastrointestinal tract (Koller & Hintz, 1978;Udén & Van Soest, 1984;Miraglia et al, 1988;Moore-Colyer et al, 2002;Hyslop, 2006).…”

Section: Introductionmentioning

confidence: 99%

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In situ caecal degradation of roughages in horses

et al. 2010

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-The present study was carried out to evaluate the in situ degradation of dry matter (DM), neutral detergent fiber (NDF) and crude protein (CP) in roughages by the in situ caecal digestion technique in horses. The roughages evaluated were: Lucerne hay (Medicago sativa), peanut (Arachis pintoi cv. Amarillo), desmodio(Desmodium ovalifolium), stylo (Stylosanthes guianensis cv. Mineirão), pigeon pea (Cajanus cajan), lime-yellow pea (Macrotyloma axillare) and coastcross hay (Cynodon dactylon cv. coastcross). The assay was conducted in a complete randomized design with seven roughages and three replications. One mare with a cannula fitted in the caecum was used, fed diet consisting of coastcross hay (80%) and concentrate (20%) at 2.0% BW, four times a day. Nylon 6.5 × 20 cm bags were used with 45 μ/pore, containing 5. Key Words: cannula, digestion, fiber, forage, legume Degradação cecal in situ de alimentos volumosos em equinos RESUMO -Objetivou-se avaliar a degradação da matéria seca (MS), fibra em detergente neutro (FDN) e proteína bruta de alimentos volumosos pela técnica da digestão cecal in situ em equinos. Avaliaram-se as forrageiras: feno de alfafa (Medicago sativa), amendoim forrageiro (Arachis pintoi cv. Amarillo), desmódio (Desmodium ovalifolium), estilosantes (Stylosanthes guianensis cv. Mineirão), guandu (Cajanus cajan), macrotiloma (Macrotyloma axillare) e feno de coastcross (Cynodon dactylon cv. coastcross). O ensaio teve duração de 35 dias e foi realizado em delineamento inteiramente casualizado com sete alimentos e três repetições. Utilizou-se uma égua fistulada no ceco, alimentada com dieta composta por feno de coastcross (80%) e concentrado (20%), fornecida quatro vezes ao dia em quantidade equivalente a 2% do peso vivo. No ceco, foram inseridos 3 a 4 sacos de náilon de porosidade 45 μ de 6,5 × 20 cm, contendo 5,2 g de MS/saco, nos tempos de 2, 4, 6, 8, 12, 24 e 48 horas de incubação. Os parâmetros de degradação da MS de todos os volumosos foram significativos. Não houve ajuste no modelo de degradação da PB e FDN do guandu. O amendoim, estilosantes e macrotiloma apresentaram maior fração potencialmente degradável da MS, com valores de 53, 46,5 e 40%, respectivamente, e os maiores valores da fração solúvel de 20, 21, 28,6%, além de elevadas taxas de degradação (10,36, 20,26 e 14,8%h -1 ). Nestes alimentos, também foram observadas as maiores taxas de degradação da FDN (9,1 e 11,3, 11,2%h -1 ), das frações potencialmente degradáveis (55, 51,8 e 47,2%) e as mais altas taxas de degradação da PB em 48 horas de incubação (87, 95, 94,8%, respectivamente). O amendoim forrageiro, o estilosantes e o macrotiloma apresentam potencial de uso nas dietas para equinos.Palavras-chave: cânula, digestão, fibra, forrageiras, leguminosa R. Bras.

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Section: Resultssupporting

confidence: 79%

Section: Resultsmentioning

confidence: 99%

“…Three or four bags were placed in the caecum at every incubation time, beginning always at 9 a.m.. The bags were incubated according to Hyslop (2006), for 0, 2, 4, 6, 12, 24 and 48 hours.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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In situ caecal degradation of roughages in horses

et al. 2010

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“…Although several workers have examined the total intestinal tract digestibility of different fibrous feeds in horses using the mobile bag technique (Martin-Rosset et al, 1984;Macheboeuf et al, 1995;Moore-Colyer et al, 2002;Hyslop, 2006), limited information is still available on the site and to the extent of their digestion within the different regions of the gastrointestinal tract. Knowledge of the amount of feed that is digested within a certain region of the gut is particularly useful when considering energy production and use (Vermorel and Martin-Rosset, 1997).…”

Section: Pre-cecal Digestionmentioning

confidence: 99%

Understanding the equine cecum-colon ecosystem: current knowledge and future perspectives

Santos¹,

Rodrigues²,

Bessa³

et al. 2011

Animal

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Having evolved as a grazing animal, a horse's digestive physiology is characterized by rapid gastric transit, a rapid but intense enzymatic digestion along the small intestine, and a long and intense microbial fermentation in the large intestine. The process of understanding and describing feed degradation mechanisms in the equine digestive system in general, and in the hindgut ecosystem in particular, is essential. Regardless of its importance for the nutritional status of the host, the significance of the cecum-colon ecosystem has not yet been fully understood, and few reports have focused deeply on the contribution of the hindgut microbial population to the nitrogen and energy requirements of the horse. Compared to ruminal activity, very little is known about hindgut ecosystem activity in the horse. Information concerning the metabolism of this microbial population and its requirements is lacking. The use of internal bacterial markers for quantifying microbial outflow in ruminants is widely reported. These techniques can be applied to cecum-colon microbial quantification, contributing to a better characterization of this ecosystem. It is likely wrong to believe that the optimization strategy in the hindgut is similar to what happens in the rumen -that is, to maximize microbial growth and, therefore, fermentation. If we consider the type of substrate that, in normal conditions, arrives in the hindgut, we can expect it to be nitrogen limiting, providing limited nitrogen-based substrates for microbial fermentation. In this review paper, we intend to gather existing information on the equine ecosystem and to provide future perspectives of research.Keywords: horse, cecum, colon, digestive strategy ImplicationsThe process of understanding and describing degradation mechanisms in the equine digestive ecosystem in general, and in the hindgut in particular, is essential to provide information for proper feeding practices to be implemented. Regardless of its importance for the nutritional status of the host, the significance of hindgut fermentation has not yet been fully understood, and few reports have focused deeply on the contribution of the hindgut microbial population to the nitrogen and energy requirements of the horse. In this review paper, we intend to gather existing information on the equine ecosystem and to provide future perspectives of research. IntroductionHorses are free-ranging herbivores of grassland environments adapted to eat large quantities of high fiber feeds (Janis, 1976;Bennett, 1980). Nowadays, with the increase of their use in sports and leisure, many horses are housed during long periods of time and fed daily on two or three meals of forages plus concentrate. The forage component of the diet is sometimes characterized by having low-tomedium energy concentration and variable levels of fiber and protein (Micol and Martin-Rosset, 1995). This pattern of feed supply is not as expected by the horse's phylogenetic adaptation to grassland environments (Janis, 1976). These management procedures have i...

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