The voluntary intake of silage by sheep:I. Interrelationships between silage composition and intake
Abstract
SUMMARY The voluntary intake by sheep of seventy silages was measured in experiments in several years. Linear and multiple regression analyses were made between these voluntary intakes and the contents of dry matter, various acids and nitrogen and the digestibility value determined in vivo. There were some differences in these relationships for silages made from different groups of species, particularly those made from legumes. Voluntary intake was positively correlated with the contents of dry matter, nitrogen, lactic acid as a percentage of total acids and with the Flieg index. Voluntary intake was negatively correlated with the contents of acetic acid and ammonia as a percentage of total N. Although pH alone did not account for a significant part of the variation in intake, multiple regressions in which pH and one of the measurements of fermentation quality were included were significant, with pH positively related to intake. When all silages were considered, the correlation between voluntary intake and the apparent digestibility of dry matter was not significant. However, for legumes this correlation was significant and positive and for grasses other than ryegrass the correlation was significant and negative.
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Past studies have sometimes associated high acetic acid concentrations in silages with lower DMI.
“In past studies, high concentrations of acetic acid in silages have sometimes been associated with lower DMI (Wilkins et al., 1971;Rook and Gill, 1990).”
From The effect of treating whole-plant barley with Lactobacillus buchneri 40788 on silage fermentation, aerobic stability, and nutritive value for dairy cows (2002) · cites this paper as Wilkins et al., 1971
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- Authors
- Wilkins, R. J., Hutchinson, K. J., Wilson, R. F., & Harris, C. E.
- ORCID
- Wilson, R. F.
- Venue
- The Journal of Agricultural Science
- Publisher
- Cambridge University Press (CUP)
- Published
- 1971-12
- Volume
- 77
- Issue
- 3
- Pages
- 531-537
- ISSN
- 0021-8596 (ISSN-L)
- 1469-5146
- OpenAlex
- W2146759895
- Cited by
- 189
- References
- 22
- Citations by year
- 2024: 3 · 2023: 1 · 2022: 1 · 2021: 1 · 2020: 4 · 2019: 3 · 2018: 3 · 2017: 3 · 2016: 1 · 2015: 2 · 2014: 3 · 2013: 3 · 2012: 1
- FWCI
- 10.06
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- The Journal of Agricultural Science (publishedVersion)
- Topics
- Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Ruminant Nutrition and Digestive Physiology
- Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Animal Nutrition and Physiology
- Life Sciences › Agricultural and Biological Sciences › Forestry › Pasture and Agricultural Systems
- Keywords
- silage, sheep, voluntary intake, silage composition, lactic acid, acetic acid, ammonia, silage pH, apparent digestibility, Fabaceae, Poaceae, ryegrass, nitrogen content
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