Effects of feeding level on efficiency of high and low residual feed intake beef steers
Credit: Journal of Animal Science, Volume 98, Issue 10, October 2020, skaa317, doi.org/10.1093/jas/skaa317
Publisher: American Society of Animal Science
Rights: Name must appear as a credit whenever the image is used- Journal of Animal Science, Volume 98, Issue 10, October 2020, skaa317, https://doi.org/10.1093/jas/skaa317
Description: The physiological basis for differences in beef cattle feed efficiency, as defined by residual feed intake (RFI), has been explored extensively. Divergent RFI may be partially explained by differences in nutrient digestibility and rumen volatile fatty acid production (Johnson et al., 2019), feeding behavior (Parsons et al., 2020), and intestinal microbiome composition (Welch et al., 2020). With increasing concerns regarding climate change and narrow profit margins, a recent paper examined efficiency parameters in feed-restricted beef steers (Andreini et al., 2020). Results point to conserved mechanisms underlying low RFI which may be a cost benefit for producers experiencing fewer feed resources.