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Characterization of in situ fibre digestion of several fibrous foods

Published online by Cambridge University Press:  18 August 2016

B. Escalona ,
R. Rocha ,
J. García ,
R. Carabaño  and
C. de Blast
B. Escalona
Affiliation:
Departamento de Producción Animal, Universidad Politécnica ETS Ingenieros Agrónomos, 28040, Madrid, Spain
R. Rocha
Affiliation:
Departamento de Producción Animal, Universidad Politécnica ETS Ingenieros Agrónomos, 28040, Madrid, Spain
J. García
Affiliation:
Departamento de Producción Animal, Universidad Politécnica ETS Ingenieros Agrónomos, 28040, Madrid, Spain
R. Carabaño
Affiliation:
Departamento de Producción Animal, Universidad Politécnica ETS Ingenieros Agrónomos, 28040, Madrid, Spain
C. de Blast*
Affiliation:
Departamento de Producción Animal, Universidad Politécnica ETS Ingenieros Agrónomos, 28040, Madrid, Spain
*
†To whom correspondence should be addressed.
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Abstract

The disappearance of neutral-detergent fibre (NDF) from six fibrous foods (lucerne hay, NaOH-treated barley straw, olive leaves, paprika meal, soya-bean hulls and sunflower hulls) when incubated in the rumen of sheep in nylon bags was investigated. Source of fibre, time of incubation and its interaction had a significant (P < 0·01) effect on NDF degradation. Stepwise regression analysis showed that the best single predictor for NDF degradation rate was the hemicellulose fraction of NDF (HEMndf). The variables selected to predict potential degradability and degradability of NDF at 72 h were the proportions of acid-detergent lignin in NDF (ADLndf, first step) and of acid-detergent cutin in ADL (ADCadl, second step). For NDF degradability at 12 h, the variables selected were the proportions of HEMndf, ADLndf and ADCadl, in the first, second and third step, respectively. The results showed that ADC is an important component to understand NDF degradability at both 12 and 72 h.

Keywords

fibrerumen digestion
Type
Research Article
Information
Animal Science , Volume 68 , Issue 1 , February 1999 , pp. 217 - 221
Copyright
Copyright © British Society of Animal Science 1999

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