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Digestibility of silages in relation to their hydroxycinnamic acid content and lignin composition

AuthorsTaboada, Alfredo; Novo-Uzal, Esther; Flores, Gonzalo; Loureda, María; Barceló, Alfonso Ros; Masa Vázquez, Antón ; Pomar, F.
KeywordsIn vivo digestibility
Cell wall
Issue Date2010
PublisherJohn Wiley & Sons
CitationJournal of the Science of Food and Agriculture 90 (7): 1155- 1162 (2010)
AbstractBACKGROUND: The effectiveness of the analysis of cell wall-bound hydroxycinnamic acids and the composition of lignin to evaluate the in vivo digestibility of a silage collection with unknown botanical composition was evaluated.
RESULTS: Syringyl units content and total etherified phenols showed the highest correlation coefficients with in vivo dry matter digestibility (IVDMD) (r = − 0.792 and r = − 0.703, respectively), while guaiacyl units and total phenols showed the highest correlation coefficients with in vivo organic matter digestibility (IVOMD) (r = − 0.871 and r = − 0.817, respectively). Using the above-mentioned chemical parameters, 10 equations were also developed to predict in vivo digestibility. The prediction of IVDMD produced a high adjusted R2 value (0.710) using syringyl, total lignin, etherified total phenols, esterified ferulic acid and total phenol content as predictors. The prediction of IVOMD produced a higher adjusted R2 value (0.821) using guaiacyl, total phenols, total ferulic acid and etherified p-coumaric acid content as predictors.
CONCLUSION: Cell wall digestibility depends on a multiplicity of factors and it is not possible to attribute a causal effect on in vivo digestibility to any single factor. However, syringyl and guaiacyl content and etherified phenols emerge as good predictors of digestibility.
Publisher version (URL)http://dx.doi.org/10.1002/jsfa.3933
Identifiersdoi: 10.1002/jsfa.3933
issn: 0022-5142
e-issn: 1097-0010
Appears in Collections:(MBG) Artículos
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