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Article

The Influence of Age and Winter Environment on Protein Block Intake Behavior of Beef Cattle Winter Grazing Mixed-Grass Rangelands †

1
Northern Agricultural Research Center, Montana State University, Havre, MT 59501, USA
2
PerforMix Nutrition Systems, Nampa, ID 83687, USA
3
Department of Animal and Range Sciences, Montana State University, Bozeman, MT 59717, USA
*
Author to whom correspondence should be addressed.
This paper is an extended version of the conference proceeding: Wyffels, S.A., Parsons, C.T., Dafoe, J.M., Boss, D.L., McClain, T.P., Carter, B.H., DelCurto, T. 2020. The influence of age and winter environment on Rumax Bovibox and Bovibox HM supplement intake behavior of winter grazing beef cattle on mixed-grass rangelands. In Western Section American Society of Animal Science, Madison, WI, USA, 19–23 July 2020; Translational Animal Science, pp. S37–S42.
Academic Editor: Brian J. Leury
Ruminants 2021, 1(2), 191-201; https://doi.org/10.3390/ruminants1020014
Received: 29 July 2021 / Revised: 28 September 2021 / Accepted: 7 December 2021 / Published: 9 December 2021
(This article belongs to the Special Issue Feature Papers of Ruminants 2021-2022)
This study evaluated the influence of cow age and temperature adjusted for windchill (Twindchill) on supplement intake behavior of cattle winter grazing rangelands. A mixed-age herd of Angus-based cows (291 and 316 in year 1 and 2, respectively) were classified by age (1-, 2-, 3-, 4-, 5–7-, and ≥8-year-old) and grazed rangeland pasture (329-ha) for two consecutive winters. Cows were provided free-choice access to supplement protein blocks in a SmartFeedPro self-feeder system. An Onset HOBO Weather Station collected data throughout the grazing period. Supplement intake (expressed as kg∙d−1 and g∙kg body weight−1), the coefficient of variation in supplement intake and intake rate (g∙min−1) displayed Twindchill × cow age × year interactions (p ≤ 0.02). In general, cow age displayed a quadratic effect on all supplement intake variables (p ≤ 0.04), where 3- to 4-year-old cattle had the greatest supplement intake with the least variation, while yearling cattle had the least amount of supplement intake and the greatest variation. In conclusion, winter environmental conditions interacted with cow age to affect cattle supplement intake behavior and, consequently, the efficacy of nutrient delivery systems for beef cattle winter grazing on rangelands. View Full-Text
Keywords: beef cattle; cow age; environment; protein blocks; supplement intake beef cattle; cow age; environment; protein blocks; supplement intake
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MDPI and ACS Style

Wyffels, S.A.; Parsons, C.T.; Dafoe, J.M.; Boss, D.L.; Carter, B.H.; DelCurto, T. The Influence of Age and Winter Environment on Protein Block Intake Behavior of Beef Cattle Winter Grazing Mixed-Grass Rangelands. Ruminants 2021, 1, 191-201. https://doi.org/10.3390/ruminants1020014

AMA Style

Wyffels SA, Parsons CT, Dafoe JM, Boss DL, Carter BH, DelCurto T. The Influence of Age and Winter Environment on Protein Block Intake Behavior of Beef Cattle Winter Grazing Mixed-Grass Rangelands. Ruminants. 2021; 1(2):191-201. https://doi.org/10.3390/ruminants1020014

Chicago/Turabian Style

Wyffels, Samuel A., Cory T. Parsons, Julia M. Dafoe, Darrin L. Boss, Boone H. Carter, and Timothy DelCurto. 2021. "The Influence of Age and Winter Environment on Protein Block Intake Behavior of Beef Cattle Winter Grazing Mixed-Grass Rangelands" Ruminants 1, no. 2: 191-201. https://doi.org/10.3390/ruminants1020014

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