Grazing behavior and production for lactating cows differing in residual feed intake while grazing spring and summer rangeland Article Swipe
James Sprinkle
,
Melinda J Ellison
,
J. B. Hall
,
Joel Yelich
,
Carmen M Willmore
,
Jameson R Brennan
·
YOU?
·
· 2021
· Open Access
·
· DOI: https://doi.org/10.1093/tas/txab063
YOU?
·
· 2021
· Open Access
·
· DOI: https://doi.org/10.1093/tas/txab063
The objectives were to determine if previously classified, efficient (LRFI, low-residual-feed intake, n = 12 × 2 yr) vs. inefficient (HRFI, high-residual-feed intake, n = 12 × 2 yr) lactating 2-yr-old Hereford × Angus cows differed in grazing behavior, body weight (BW), body condition score (BCS), and calf weaning weight while grazing rugged rangeland pastures. Cows were fitted with grazing halters containing both an accelerometer and a global positioning system (GPS) data logger during June 14 to July 4, 2016, August 2 to 25, 2016, May 23 to June 12, 2017, and August 5 to 28, 2017. GPS data were recorded at 7-min intervals in 2016 and 4-min intervals in 2017 and accelerometer data recorded at 25 times/s. Grazing time (GT), resting, walking, bite rate (BR), daily travel distance (DTD), elevation, and slope were analyzed with a mixed model that included fixed effects of RFI group, day, and RFI group × day and cow within treatment as the random effect. Cow BW, BCS, and calf weaning weight were analyzed by analysis of variance with treatment as the main effect. There were no differences (P > 0.10) due to RFI detected for BW, BCS, or calf weaning weights. During periods of mild heat load (MHL), HRFI cows spent more (P < 0.05) time resting during the day at lower elevations (P < 0.05) than LRFI cows. During a 6-d period in spring with only 2 h MHL, HRFI cows grazed 1.7 h/d longer than LRFI cows (P < 0.05); commencing grazing earlier in the morning and extending the grazing bout later. During the summer with > MHL, LRFI cows grazed more than HRFI cows 18% of the time (P < 0.10). The HRFI cows had greater GT than LRFI cows only 3% of the time (P < 0.10) during summer. There was no difference (P > 0.10) in BR between HRFI and LRFI cattle. The DTD tended (P < 0.10) to be greater for LRFI cattle during summer 2017. Over all sample periods, HRFI had greater walking than LRFI 15% of the time and LRFI exceeded HRFI cattle for walking 3% of the time (P < 0.10). The greater walking for HRFI was assumed to be associated with more search grazing. Metabolic heat load on hot summer days for HRFI cattle is presumed to have contributed to differences observed in grazing behavior. These results suggest that lactating cows with low-RFI phenotypes appear to be better adapted to grazing rugged rangelands in late summer during periods of MHL.
Related Topics
Concepts
Grazing
Animal science
Residual feed intake
Weaning
Rangeland
Body weight
Biology
Ecology
Feed conversion ratio
Endocrinology
Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1093/tas/txab063
- https://academic.oup.com/tas/article-pdf/5/2/txab063/38690853/txab063.pdf
- OA Status
- gold
- Cited By
- 10
- References
- 45
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W3150811075
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W3150811075Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.1093/tas/txab063Digital Object Identifier
- Title
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Grazing behavior and production for lactating cows differing in residual feed intake while grazing spring and summer rangelandWork title
- Type
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articleOpenAlex work type
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enPrimary language
- Publication year
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2021Year of publication
- Publication date
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2021-04-01Full publication date if available
- Authors
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James Sprinkle, Melinda J Ellison, J. B. Hall, Joel Yelich, Carmen M Willmore, Jameson R BrennanList of authors in order
- Landing page
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https://doi.org/10.1093/tas/txab063Publisher landing page
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https://academic.oup.com/tas/article-pdf/5/2/txab063/38690853/txab063.pdfDirect link to full text PDF
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YesWhether a free full text is available
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goldOpen access status per OpenAlex
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https://academic.oup.com/tas/article-pdf/5/2/txab063/38690853/txab063.pdfDirect OA link when available
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Grazing, Animal science, Residual feed intake, Weaning, Rangeland, Body weight, Biology, Ecology, Feed conversion ratio, EndocrinologyTop concepts (fields/topics) attached by OpenAlex
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10Total citation count in OpenAlex
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2025: 5, 2023: 1, 2022: 1, 2021: 3Per-year citation counts (last 5 years)
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45Number of works referenced by this work
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10Other works algorithmically related by OpenAlex
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| primary_topic.domain.display_name | Life Sciences |
| primary_topic.subfield.id | https://openalex.org/subfields/1103 |
| primary_topic.subfield.display_name | Animal Science and Zoology |
| primary_topic.display_name | Effects of Environmental Stressors on Livestock |
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| counts_by_year[2].cited_by_count | 1 |
| counts_by_year[3].year | 2021 |
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| publication_date | 2021-04-01 |
| publication_year | 2021 |
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