Mineral status, metabolism and performance of dairy heifers receiving a combined trace element bolus and out-wintered on perennial ryegrass, kale or fodder beet

Norton Atkins*, Emma Bleach, Sandy Mackenzie, PR Hargreaves, Liam Sinclair

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

The effects of a cobalt (Co), copper (Cu), selenium (Se), and iodine (I) trace-mineral ruminal bolus on the mineral status and performance of out-wintered, pregnant dairy heifers was investigated. Nine commercial farms grazing pasture (G), kale (K), or fodder beet (F) were used (n=3 per forage), with forty heifers on each farm randomly allocated to not receive (B-) or receive (B+) two combined mineral boluses. Mean plasma Co concentrations were 0.021 and 0.041 μmol/L in B- and B+ respectively (p < 0.001), with serum vitamin B12 also higher in heifers receiving B+ than B- (p < 0.001). Mean plasma Se concentration was 0.50 and 0.82 μmol/L in B- and B+ respectively, with heifers that received B+ also having a higher (p < 0.05) mean blood GSH-Px concentration (30 and 76 U/mL haematocrit in B- and B+ respectively). Providing a mineral bolus did not affect plasma Cu concentration in heifers receiving G or F (p <0.05), but was higher in KB+ compared to KB- (p < 0.05) at the middle and end of the out-wintering period. Heifers receiving KB- also had a lower haemoglobin and red blood cell count, but a higher mean corpuscular volume than KB+ at the end of the out-wintering period. Animals receiving B- had a higher plasma thyroxine concentration (p < 0.05). Neither the bolus nor forage type affected body weight (p > 0.05), however condition score was higher (p < 0.05) in B+ at the end of the study. It is concluded that the provision of a trace mineral bolus increased plasma concentrations of the minerals supplied, with the greatest benefits in animals grazing kale, but these increases were not translated into improved performance.
Original languageEnglish
Article number103865
JournalLivestock Science
Volume231
Early online date11 Nov 2019
DOIs
Publication statusPrint publication - Jan 2020

Fingerprint

forage beets
Lolium
kale
Beta vulgaris
dairy heifers
Brassica
Trace Elements
Lolium perenne
Minerals
trace elements
heifers
minerals
metabolism
cobalt
Selenium
Cobalt
selenium
grazing
forage
Erythrocyte Count

Keywords

  • Brassica
  • Dairy heifer
  • Forages
  • Minerals
  • Vitamin B
  • Wintering

Cite this

@article{4f17c26b6f2c4d5998f2ad79daad4e5c,
title = "Mineral status, metabolism and performance of dairy heifers receiving a combined trace element bolus and out-wintered on perennial ryegrass, kale or fodder beet",
abstract = "The effects of a cobalt (Co), copper (Cu), selenium (Se), and iodine (I) trace-mineral ruminal bolus on the mineral status and performance of out-wintered, pregnant dairy heifers was investigated. Nine commercial farms grazing pasture (G), kale (K), or fodder beet (F) were used (n=3 per forage), with forty heifers on each farm randomly allocated to not receive (B-) or receive (B+) two combined mineral boluses. Mean plasma Co concentrations were 0.021 and 0.041 μmol/L in B- and B+ respectively (p < 0.001), with serum vitamin B12 also higher in heifers receiving B+ than B- (p < 0.001). Mean plasma Se concentration was 0.50 and 0.82 μmol/L in B- and B+ respectively, with heifers that received B+ also having a higher (p < 0.05) mean blood GSH-Px concentration (30 and 76 U/mL haematocrit in B- and B+ respectively). Providing a mineral bolus did not affect plasma Cu concentration in heifers receiving G or F (p <0.05), but was higher in KB+ compared to KB- (p < 0.05) at the middle and end of the out-wintering period. Heifers receiving KB- also had a lower haemoglobin and red blood cell count, but a higher mean corpuscular volume than KB+ at the end of the out-wintering period. Animals receiving B- had a higher plasma thyroxine concentration (p < 0.05). Neither the bolus nor forage type affected body weight (p > 0.05), however condition score was higher (p < 0.05) in B+ at the end of the study. It is concluded that the provision of a trace mineral bolus increased plasma concentrations of the minerals supplied, with the greatest benefits in animals grazing kale, but these increases were not translated into improved performance.",
keywords = "Brassica, Dairy heifer, Forages, Minerals, Vitamin B, Wintering",
author = "Norton Atkins and Emma Bleach and Sandy Mackenzie and PR Hargreaves and Liam Sinclair",
year = "2020",
month = "1",
doi = "10.1016/j.livsci.2019.103865",
language = "English",
volume = "231",
journal = "Livestock Science",
issn = "1871-1413",
publisher = "Elsevier",

}

Mineral status, metabolism and performance of dairy heifers receiving a combined trace element bolus and out-wintered on perennial ryegrass, kale or fodder beet. / Atkins, Norton; Bleach, Emma; Mackenzie, Sandy; Hargreaves, PR; Sinclair, Liam.

In: Livestock Science, Vol. 231, 103865, 01.2020.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Mineral status, metabolism and performance of dairy heifers receiving a combined trace element bolus and out-wintered on perennial ryegrass, kale or fodder beet

AU - Atkins, Norton

AU - Bleach, Emma

AU - Mackenzie, Sandy

AU - Hargreaves, PR

AU - Sinclair, Liam

PY - 2020/1

Y1 - 2020/1

N2 - The effects of a cobalt (Co), copper (Cu), selenium (Se), and iodine (I) trace-mineral ruminal bolus on the mineral status and performance of out-wintered, pregnant dairy heifers was investigated. Nine commercial farms grazing pasture (G), kale (K), or fodder beet (F) were used (n=3 per forage), with forty heifers on each farm randomly allocated to not receive (B-) or receive (B+) two combined mineral boluses. Mean plasma Co concentrations were 0.021 and 0.041 μmol/L in B- and B+ respectively (p < 0.001), with serum vitamin B12 also higher in heifers receiving B+ than B- (p < 0.001). Mean plasma Se concentration was 0.50 and 0.82 μmol/L in B- and B+ respectively, with heifers that received B+ also having a higher (p < 0.05) mean blood GSH-Px concentration (30 and 76 U/mL haematocrit in B- and B+ respectively). Providing a mineral bolus did not affect plasma Cu concentration in heifers receiving G or F (p <0.05), but was higher in KB+ compared to KB- (p < 0.05) at the middle and end of the out-wintering period. Heifers receiving KB- also had a lower haemoglobin and red blood cell count, but a higher mean corpuscular volume than KB+ at the end of the out-wintering period. Animals receiving B- had a higher plasma thyroxine concentration (p < 0.05). Neither the bolus nor forage type affected body weight (p > 0.05), however condition score was higher (p < 0.05) in B+ at the end of the study. It is concluded that the provision of a trace mineral bolus increased plasma concentrations of the minerals supplied, with the greatest benefits in animals grazing kale, but these increases were not translated into improved performance.

AB - The effects of a cobalt (Co), copper (Cu), selenium (Se), and iodine (I) trace-mineral ruminal bolus on the mineral status and performance of out-wintered, pregnant dairy heifers was investigated. Nine commercial farms grazing pasture (G), kale (K), or fodder beet (F) were used (n=3 per forage), with forty heifers on each farm randomly allocated to not receive (B-) or receive (B+) two combined mineral boluses. Mean plasma Co concentrations were 0.021 and 0.041 μmol/L in B- and B+ respectively (p < 0.001), with serum vitamin B12 also higher in heifers receiving B+ than B- (p < 0.001). Mean plasma Se concentration was 0.50 and 0.82 μmol/L in B- and B+ respectively, with heifers that received B+ also having a higher (p < 0.05) mean blood GSH-Px concentration (30 and 76 U/mL haematocrit in B- and B+ respectively). Providing a mineral bolus did not affect plasma Cu concentration in heifers receiving G or F (p <0.05), but was higher in KB+ compared to KB- (p < 0.05) at the middle and end of the out-wintering period. Heifers receiving KB- also had a lower haemoglobin and red blood cell count, but a higher mean corpuscular volume than KB+ at the end of the out-wintering period. Animals receiving B- had a higher plasma thyroxine concentration (p < 0.05). Neither the bolus nor forage type affected body weight (p > 0.05), however condition score was higher (p < 0.05) in B+ at the end of the study. It is concluded that the provision of a trace mineral bolus increased plasma concentrations of the minerals supplied, with the greatest benefits in animals grazing kale, but these increases were not translated into improved performance.

KW - Brassica

KW - Dairy heifer

KW - Forages

KW - Minerals

KW - Vitamin B

KW - Wintering

UR - http://www.scopus.com/inward/record.url?scp=85076273160&partnerID=8YFLogxK

U2 - 10.1016/j.livsci.2019.103865

DO - 10.1016/j.livsci.2019.103865

M3 - Article

VL - 231

JO - Livestock Science

JF - Livestock Science

SN - 1871-1413

M1 - 103865

ER -