Comparison of energy rationing systems for late gestation ewes: Impacts on ewe and lamb performance. Issue 8 (1st August 2016)
- Record Type:
- Journal Article
- Title:
- Comparison of energy rationing systems for late gestation ewes: Impacts on ewe and lamb performance. Issue 8 (1st August 2016)
- Main Title:
- Comparison of energy rationing systems for late gestation ewes: Impacts on ewe and lamb performance
- Authors:
- Campion, F. P.
McGovern, F. M.
Lott, S.
Fahey, A. G.
Creighton, P.
Boland, T. M. - Abstract:
- Abstract: The objectives of this study were 1) to compare the effects of a ME (AFRC, 1993 ) or a NE (Jarrige, 1989 ) system for rationing ewes during late gestation on ewe and progeny performance and 2) to investigate incremental increases in NE allocation above 100% of recommendation during late gestation on ewe and progeny performance. Fifty-two twin-bearing ewes ( n = 13 per treatment) were rationed to either 100% of recommended ME requirements (100% ME) or 100, 110, or 120% of recommended NE requirements (100% NE, 110% NE, and 120% NE) from d 112 of gestation to parturition. Mean energy intake, measured as ME and NE, from Day 112 of gestation to parturition was higher in all NE treatments compared with 100% ME ewes ( P = 0.01). Ewes offered the 3 NE treatments had a higher live weight at parturition compared with 100% ME ewes ( P = 0.02), with 100% NE and 120% NE ewes still being heavier than 100% ME ewes at 35 d postpartum ( P = 0.02). Increasing NE allowance resulted in a linear decrease in the level of BCS loss prepartum ( P = 0.01) and a linear increase in the level of BCS loss postpartum ( P = 0.01). There was no difference observed between any of the treatments in total colostrum produced to 18 h postpartum ( P = 0.29) or in total colostrum intake to 18 h postpartum ( P = 0.27). Increasing maternal NE allowance led to a linear increase in lamb serum IgG concentration at 24 h postpartum ( P = 0.03). The estimated milk production of 120% NE ewes tended to be higherAbstract: The objectives of this study were 1) to compare the effects of a ME (AFRC, 1993 ) or a NE (Jarrige, 1989 ) system for rationing ewes during late gestation on ewe and progeny performance and 2) to investigate incremental increases in NE allocation above 100% of recommendation during late gestation on ewe and progeny performance. Fifty-two twin-bearing ewes ( n = 13 per treatment) were rationed to either 100% of recommended ME requirements (100% ME) or 100, 110, or 120% of recommended NE requirements (100% NE, 110% NE, and 120% NE) from d 112 of gestation to parturition. Mean energy intake, measured as ME and NE, from Day 112 of gestation to parturition was higher in all NE treatments compared with 100% ME ewes ( P = 0.01). Ewes offered the 3 NE treatments had a higher live weight at parturition compared with 100% ME ewes ( P = 0.02), with 100% NE and 120% NE ewes still being heavier than 100% ME ewes at 35 d postpartum ( P = 0.02). Increasing NE allowance resulted in a linear decrease in the level of BCS loss prepartum ( P = 0.01) and a linear increase in the level of BCS loss postpartum ( P = 0.01). There was no difference observed between any of the treatments in total colostrum produced to 18 h postpartum ( P = 0.29) or in total colostrum intake to 18 h postpartum ( P = 0.27). Increasing maternal NE allowance led to a linear increase in lamb serum IgG concentration at 24 h postpartum ( P = 0.03). The estimated milk production of 120% NE ewes tended to be higher than all other treatments at wk 6 of lactation ( P = 0.08). Colostral SFA levels from 100% ME ewes was lower than that of all 3 NE treatments ( P = 0.01), and unsaturated fatty acid (UFA) levels in colostrum of the 100% ME ewes were lower than those of the 100% NE ewes ( P = 0.01). Cumulative levels of milk SFA, UFA, and MUFA did not differ between treatments ( P = 0.19). Lamb growth rates during the first 5 wk postpartum were unaffected by treatment ( P = 0.18) as were days to slaughter ( P = 0.34). It can be concluded that both ME and NE systems used in this study are appropriate for formulating ewe diets during late gestation. Increasing NE allocation above 100% altered the pattern of body reserve mobilization during late gestation and early lactation without observed variations in lamb performance during this time. … (more)
- Is Part Of:
- Journal of animal science. Volume 94:Issue 8(2016)
- Journal:
- Journal of animal science
- Issue:
- Volume 94:Issue 8(2016)
- Issue Display:
- Volume 94, Issue 8 (2016)
- Year:
- 2016
- Volume:
- 94
- Issue:
- 8
- Issue Sort Value:
- 2016-0094-0008-0000
- Page Start:
- 3441
- Page End:
- 3456
- Publication Date:
- 2016-08-01
- Subjects:
- energy -- gestation -- nutrition -- postpartum performance -- sheep
Livestock -- Periodicals
Livestock
Electronic journals
Periodicals
636.005 - Journal URLs:
- https://dl.sciencesocieties.org/publications/jas/index ↗
http://www.asas.org/jas/ ↗
https://academic.oup.com/jas ↗
http://www.oxfordjournals.org/ ↗ - DOI:
- 10.2527/jas.2016-0522 ↗
- Languages:
- English
- ISSNs:
- 0021-8812
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - BLDSS-3PM
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- 20837.xml