2014
DOI: 10.5433/1679-0359.2014v35n5p2739
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Variations among animals when estimating the undegradable fraction of fiber in forage samples

Abstract: The objective of this study was to assess the variability among animals regarding the critical time to estimate the undegradable fraction of fiber (ct) using an in situ incubation procedure. Five rumenfistulated Nellore steers were used to estimate the degradation profile of fiber. Animals were fed a standard diet with an 80:20 forage:concentrate ratio. Sugarcane, signal grass hay, corn silage and fresh elephant grass samples were assessed. Samples were put in F57 Ankom® bags and were incubated in the rumens o… Show more

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“…Results obtained in the tropics have demonstrated that there are animal influences on in situ degradation parameters [ 10 ], which would indicate that an evaluation of the in situ degradation profile obtained with a single animal may bias the degradation rate estimates. Although diet is considered to have the greatest impact on rumen microbial diversity [ 11 , 12 ], there is an intrinsic effect of the host animal on microbial population structures [ 13 , 14 ].…”
Section: Introductionmentioning
confidence: 99%
“…Results obtained in the tropics have demonstrated that there are animal influences on in situ degradation parameters [ 10 ], which would indicate that an evaluation of the in situ degradation profile obtained with a single animal may bias the degradation rate estimates. Although diet is considered to have the greatest impact on rumen microbial diversity [ 11 , 12 ], there is an intrinsic effect of the host animal on microbial population structures [ 13 , 14 ].…”
Section: Introductionmentioning
confidence: 99%