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Physiochemical Characteristics and Molecular Structures for Digestible Carbohydrates of Silages

The main objectives of this study were (1) to assess the magnitude of differences among new barley silage varieties (BS) selected for varying rates of in vitro neutral detergent fiber (NDF) digestibility (ivNDFD; Cowboy BS with higher ivNDFD, Copeland BS with intermediate ivNDFD, and Xena BS with lower ivNDFD) with regard to their carbohydrate (CHO) molecular makeup, CHO chemical fractions, and rumen degradability in dairy cows in comparison with a new corn silage hybrid (Pioneer 7213R) and (2) to quantify the strength and pattern of association between the molecular structures and digestibility of carbohydrates. The carbohydrate-related molecular structure spectral data was measured using advanced vibrational molecular spectroscopy (FT/IR). In comparison to BS, corn silage showed a significantly (P < 0.05) higher level of starch and energy content and higher degradation of dry matter (DM). Cowboy BS had lower feeding value (higher indigestible fiber content and lower starch content) and lower DM degradat...

Authors:   Basim Refat; Luciana L. Prates; Nazir A. Khan; Yaogeng Lei; David A. Christensen; John J. McKinnon; Peiqiang Yu
Journal:   Journal of Agricultural and Food Chemistry
Year:   2017
DOI:   10.1021/acs.jafc.7b01032
Publication date:   05-Oct-2017
Facts, background information, dossiers
  • Energy
  • Dairy
  • barley
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