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28 September 2016 A nutritional evaluation of common barley varieties grown for silage by beef and dairy producers in western Canada
Jayakrishnan Nair, David Christensen, Peiqiang Yu, Aaron D. Beattie, Tim McAllister, Daalkhaijav Damiran, Natalie Preston, Leland Fuhr, John J. McKinnon
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Abstract

This study evaluated the nutritional and neutral detergent fiber digestibility (NDFD) characteristics of seven barley varieties (‘Conlon’, ‘CDC Copeland’, ‘CDC Cowboy’, ‘Falcon’, ‘Legacy’, ‘AC Metcalfe’, and ‘Xena’) grown for silage. Commercial samples (n = 80) harvested at the mid-dough stage were collected over 2 years (2012 and 2013). Average pH and dry matter (DM) content were 4.05% ± 0.17% and 36.8% ± 4.1%, respectively. ‘Falcon’ and ‘AC Metcalfe’ had higher (P < 0.05) CP relative to ‘CDC Copeland’ and ‘Xena’, with intermediate values for the other varieties. Acid (ADF) and neutral (NDF) detergent fiber contents were higher (P < 0.05) for ‘CDC Cowboy’ relative to ‘Conlon’. Starch was higher (P < 0.05) for ‘Legacy’ and ‘Conlon’ than ‘CDC Cowboy’, with intermediate values for other varieties. Legacy had a greater (P < 0.05) 6-h NDFD while ‘CDC Cowboy’ had a greater (P < 0.05) 30-h NDFD. Indigestible NDF (INDF; % NDF) was greater (P < 0.05) for ‘AC Metcalfe’ relative to ‘CDC Cowboy’ and ‘Falcon’. These results indicate that barley varieties vary with respect to chemical composition and NDFD and INDF contents. Selection for higher 30-h NDFD could result in improvements in DM and DE intake and performance of growing beef cattle.

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Jayakrishnan Nair, David Christensen, Peiqiang Yu, Aaron D. Beattie, Tim McAllister, Daalkhaijav Damiran, Natalie Preston, Leland Fuhr, and John J. McKinnon "A nutritional evaluation of common barley varieties grown for silage by beef and dairy producers in western Canada," Canadian Journal of Animal Science 96(4), 598-608, (28 September 2016). https://doi.org/10.1139/cjas-2016-0032
Received: 12 February 2016; Accepted: 31 May 2016; Published: 28 September 2016
JOURNAL ARTICLE
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KEYWORDS
barley silage
chemical composition
DaisyII
in vitro NDF digestibility
indigestible NDF
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