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image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Canadian Journal of ...arrow_drop_down
image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
Canadian Journal of Animal Science
Article . 1990 . Peer-reviewed
License: CSP TDM
Data sources: Crossref
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FEED INTAKE OF GROWING BULLS DURING SEVERE WINTERS

Authors: G. I. CHRISTISON; H. H. NICHOLSON; N. F. CYMBALUK;

FEED INTAKE OF GROWING BULLS DURING SEVERE WINTERS

Abstract

Dry matter (DM) intake was recorded daily for 12 pens of young bulls for 140 d in each of eight winters. Monthly means for DM intake ranged from 1.94 to 2.62 kg 100 kg−1 body weight (BW) and average daily gains (ADG) ranged from 1.15 to 1.46 kg d−1. Stepwise multi-variable procedures indicated that days on test (age) accounted for most of the variation in feed intake (partial R2 = 0.380). Climatic variables provided little additional explanation. Dry matter intake was scaled to 100 kg BW to minimize the influence of increasing weight with time. The multi-variable model which described weight-scaled DM intake included age (partial R2 = 0.509) and daily temperature (partial R2 = 0.013). Weight-scaled intake declined with age; the temperature effect represented a 2% increase in response to a drop in temperature from 0 to −15 °C. Equivalent increases in weight-scaled DM intake of 4.5 and 6.5%, respectively, were calculated by simple linear regressions based on daily or monthly temperature and intake values. Temperatures below −20 °C had no greater effect on intake or weight-scaled intake than those in the −10 to −20 °C range. It was also concluded that silage was unlikely to reduce DM intake at low temperatures and that European breeds of bulls had a twofold greater (P < 0.01) increase in weight-scaled DM intake in response to cold than did British breeds. Key words: Cattle, cold, environment, feed intake, winter

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
2
Average
Average
Average
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