Plasma amino acid profiles of dairy heifers grazing pasture, chicory and plantain

Innocent Rugoho, Grant Edwards, David Pacheo, Jeffrey McCormick, Chris Logan, Long Cheng

Research output: Contribution to journalArticle

Abstract

The objective of this study was to quantify amino acid (AA) profiles in plasma collected from dairy heifers grazing swards containing ryegrass/clover, chicory and plantain in autumn and spring. The study comprised a 28-day autumn trial and a 21-day spring trial using 56 Friesian x Jersey heifers. Total AA concentrations ranged from 2849 to 3165 μM in autumn and from 3195 to 3454 μM in spring, with no treatment effect. Season affected essential AA (EAA) and total AA concentrations. Total plasma AA concentrations were lower in autumn (2965 μM) than in spring (3303 μM). Based on these results, feeding dairy heifer’s either pure chicory, binary mixture or pure plantain does not affect EAA and total AA of Friesian x Jersey heifers. Further, no relationship was established between AA and weight gain of heifers in this study.
Original languageEnglish
Pages (from-to)1-7
Number of pages7
JournalNew Zealand Journal of Agricultural Research
DOIs
Publication statusE-pub ahead of print - 03 Feb 2019

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chicory
dairy heifers
pasture
amino acid
grazing
pastures
plasma
amino acids
autumn
heifers
Jersey
sward
Lolium
essential amino acids
weight gain

Cite this

Rugoho, Innocent ; Edwards, Grant ; Pacheo, David ; McCormick, Jeffrey ; Logan, Chris ; Cheng, Long. / Plasma amino acid profiles of dairy heifers grazing pasture, chicory and plantain. In: New Zealand Journal of Agricultural Research. 2019 ; pp. 1-7.
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Plasma amino acid profiles of dairy heifers grazing pasture, chicory and plantain. / Rugoho, Innocent; Edwards, Grant; Pacheo, David; McCormick, Jeffrey; Logan, Chris; Cheng, Long.

In: New Zealand Journal of Agricultural Research, 03.02.2019, p. 1-7.

Research output: Contribution to journalArticle

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AB - The objective of this study was to quantify amino acid (AA) profiles in plasma collected from dairy heifers grazing swards containing ryegrass/clover, chicory and plantain in autumn and spring. The study comprised a 28-day autumn trial and a 21-day spring trial using 56 Friesian x Jersey heifers. Total AA concentrations ranged from 2849 to 3165 μM in autumn and from 3195 to 3454 μM in spring, with no treatment effect. Season affected essential AA (EAA) and total AA concentrations. Total plasma AA concentrations were lower in autumn (2965 μM) than in spring (3303 μM). Based on these results, feeding dairy heifer’s either pure chicory, binary mixture or pure plantain does not affect EAA and total AA of Friesian x Jersey heifers. Further, no relationship was established between AA and weight gain of heifers in this study.

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