Fatty acid composition dynamics of rye (Secale cereale L.) and wheat (Triticum aestivum L.) forages under cattle grazing

Hannah N. Phillips, Bradley J. Heins, Kathleen Delate, Robert Turnbull

Research output: Contribution to journalArticlepeer-review

Abstract

There is little information on the fatty acid dynamics of forages under grazing. The objectives of this study were to determine the fatty acid compositions of fall-planted rye (Secale cereale L.) and wheat (Triticum aestivum L.) forages while rotationally grazed by steers (Bos Taurus L.) for seven weeks in the spring and summer in Minnesota, USA. With respect to the total fatty acids in forages, the concentration of α-linolenic acid (C18:3n-3) decreased linearly while the concentration of linoleic acid (C18:2n-6) increased quadratically over the grazing interval. Simultaneously, the omega-6 to omega-3 fatty acid ratio increased quadratically in forages. The fatty acid composition had a greater magnitude of variation in wheat compared to rye over the course of the grazing interval. The omega-6 to omega-3 fatty acid ratio was lower in wheat compared to rye for at least the first five weeks, but was ≤ 0.21 for both forages during the entire grazing interval. Results from this study indicated that forage fatty acid compositions varied based on number of days of the grazing interval and forage species, informing producers of potential grazing schedule adjustments to manage the dietary fatty acid intake of grazing cattle.

Original languageEnglish (US)
Article number10060813
JournalAgronomy
Volume10
Issue number6
DOIs
StatePublished - Jun 2020

Bibliographical note

Funding Information:
Funding: This research was funded by the National Institute of Food and Agriculture United States Department of Agriculture under award number 2014-51300-22541.

Publisher Copyright:
© 2020 by the authors.

Keywords

  • Cattle
  • Fatty acids
  • Forages
  • Grazing
  • Organic
  • Secale cereale
  • Triticum aestivum

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