The impact of feeding supplemental minerals to sheep on the return of micronutrients to pasture via urine and faeces

A - Papers appearing in refereed journals

Kao, P-T., Fleming, H. R., Warren, H., Darch, T., McGrath, S. P., Buss, H. L. and Lee, M. R. F. 2023. The impact of feeding supplemental minerals to sheep on the return of micronutrients to pasture via urine and faeces. Scientific Reports. 13, p. 2747. https://doi.org/10.1038/s41598-023-29717-3

AuthorsKao, P-T., Fleming, H. R., Warren, H., Darch, T., McGrath, S. P., Buss, H. L. and Lee, M. R. F.
Abstract

The form (organic versus inorganic) of minerals (Se, Zn, Cu and Mn), supplemented to sheep (Charolais × Suffolk-Mule (mean weight = 57 ± 2.9 kg) at two European industrial doses, on the return of micronutrients to pasture via nutrient partitioning and composition in sheep urine and faeces was investigated. This gave four treatments in total with 6 animals per treatment (n = 24). The form of the supplemented minerals did not influence the excretory partitioning of micronutrients (Se, Zn, Cu and Mn) between urine and faeces, nor on their concentrations in the excreta. The two doses trialed however, may influence the Se flux in the environment through altering the ratios of Se:P and Se:S ratios in the faeces and Se:S ratio in the urine. Administration of the mineral supplements also improved the retention of P in sheep reducing its excretion via urine. Although the concentrations of readily bioavailable micronutrients in the faeces were not affected by the mineral forms, there were differences in the more recalcitrant fractions of Se, Zn and Cu (as inferred via a sequential extraction) in faeces when different forms of supplemental minerals were offered. The potential impact of these differences on micronutrient flux in pasture requires further investigation.

Year of Publication2023
JournalScientific Reports
Journal citation13, p. 2747
Digital Object Identifier (DOI)https://doi.org/10.1038/s41598-023-29717-3
Open accessPublished as ‘gold’ (paid) open access
FunderBiotechnology and Biological Sciences Research Council
Funder project or codeThe North Wyke Farm Platform- National Capability [2017-22]
Publisher's version
Output statusPublished
Publication dates
Online16 Feb 2023
Publication process dates
Accepted09 Feb 2023
ISSN2045-2322
PublisherNature Publishing Group

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