dc.contributor.author |
Adejoro, Festus Adeyemi
|
|
dc.contributor.author |
Hassen, Abubeker
|
|
dc.contributor.author |
Akanmu, Abiodun Mayowa
|
|
dc.date.accessioned |
2020-03-25T05:39:28Z |
|
dc.date.available |
2020-03-25T05:39:28Z |
|
dc.date.issued |
2019-10-25 |
|
dc.description.abstract |
Tannins have become important phytochemicals in ruminant production, due to their
wide range of biological activities. The use of a crude extract often comes with limitations, such
as reduced feed intake and fibre digestibility, which could be overcome by the use of encapsulated
tannin extract. In this study, four rumen-cannulated Merino wethers were used in a 4 4 Latin square
design to determine the e ect of encapsulating Acacia mearnsii tannin extract on intake, nutrient
digestibility, and methane emission. The animals were placed on one of the following diets: control
diet only, diet + silvafeed (Silvafeed ByPro, 10 g/kg feed), diet + Acacia tannin extract (ATE), 40 g/kg
feed), and, diet + lipid-encapsulated-ATE (palm oil encapsulated ATE, 50 g/kg feed) in 4 cycles.
Wethers were o ered an Eragrotis and Lucerne hay-based total mixed ration diet above maintenance
requirement with forage: concentrate ratio 50:50. Silvafeed, a commercial tannin additive, was used
as a positive control. Nutrient intake was not di erent across the treatments, but nutrient digestibility
was a ected by dietary additives (p < 0.05). Compared to the control, and unlike the crude extract,
encapsulated-ATE and silvafeed did not reduce dry matter, organic matter, and neutral detergent
fibre digestibility. While the overall N-retention and total N-excretion (g/d) were not a ected by
dietary additives, ATE and encapsulated-ATE diets reduced urine-N excretion (g/d) and only a slight
reduction was observed in silvafeed diet. The faecal-N proportion was highest in the ATE diet
(388 g/kg N-intake), followed by encapsulated-ATE (317 g/kg), and silvafeed (267 g/kg), with the
control diet having the lowest proportion (230 g/kg). The acetate:propionate (A:P) ratio reduced as
a result of the inclusion of dietary additives with crude ATE and silvafeed having lower A:P ratio
compared to the control diet. Methane production expressed in g/kg dry matter (DM) intake was reduced by 12%, 30% and 19% in the silvafeed, crude ATE and encapsulated-ATE diets, respectively
(p < 0.05). The reduced methane production with higher neutral detergent fibre (NDF) digestibility in
the encapsulated-ATE, compared to the crude-ATE, confirms that encapsulated-tannin can be used as
an additive in ruminant diets. |
en_ZA |
dc.description.department |
Animal and Wildlife Sciences |
en_ZA |
dc.description.librarian |
am2020 |
en_ZA |
dc.description.sponsorship |
The National Research Foundation (NRF), South Africa and the Carnegie Corporation of New York under the auspices of the Future Africa Fellowship Programme
of the University of Pretoria. |
en_ZA |
dc.description.uri |
http://www.mdpi.com/journal/animals |
en_ZA |
dc.identifier.citation |
Adejoro, F.A., Hassen, A. & Akanmu, A.M. 2019, 'Effect of lipid-encapsulated Acacia tannin extract on feed Intake, nutrient digestibility and methane
emission in sheep', Animals, vol. 9, no. 11, art. 863, pp. 1-13. |
en_ZA |
dc.identifier.issn |
2076-2615 (online) |
|
dc.identifier.other |
10.3390/ani9110863 |
|
dc.identifier.uri |
http://hdl.handle.net/2263/73822 |
|
dc.language.iso |
en |
en_ZA |
dc.publisher |
MDPI |
en_ZA |
dc.rights |
© 2019 by the authors.
This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license. |
en_ZA |
dc.subject |
Acacia |
en_ZA |
dc.subject |
Lipid-encapsulated tannin |
en_ZA |
dc.subject |
Methane emission |
en_ZA |
dc.subject |
Nitrogen balance |
en_ZA |
dc.subject |
Nutrient digestibility |
en_ZA |
dc.title |
Effect of lipid-encapsulated Acacia tannin extract on feed Intake, nutrient digestibility and methane emission in sheep |
en_ZA |
dc.type |
Article |
en_ZA |