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Supplementation of lactating ewes with a glucogenic preparation or β-carotene in mid- To late lactation on subsequent milk yield and luteinizing hormone secretion
dc.creator | Brozos, C. N. | en |
dc.creator | Kiossis, E. | en |
dc.creator | Fthenakis, G. C. | en |
dc.creator | Tsousis, G. | en |
dc.creator | Boscos, C. | en |
dc.date.accessioned | 2015-11-23T10:24:16Z | |
dc.date.available | 2015-11-23T10:24:16Z | |
dc.date.issued | 2007 | |
dc.identifier.issn | 83984 | |
dc.identifier.uri | http://hdl.handle.net/11615/26480 | |
dc.description.abstract | The effects of a glucogenic preparation (Nutrimix®) or β-carotene (Rovimix® beta carotene) supplementation of ewes during mid- to late-lactation on their milk yield were assessed in a study where 66 Chios-breed ewes were allocated into three equal (n = 22) groups. Ewes in group A received daily a glucogenic preparation and those in group B β-carotene, starting 35 d before estrus synchronization until 7 d after artificial insemination (supplementation period); ewes in group C were untreated controls. The estrus cycle was synchronized and double AI was carried out 48 and 60 h after withdrawal of progestagen sponges. Milk yield was measured daily during the supplementation period. Blood samples were collected at 2-h intervals, from 28 to 54 h after sponge withdrawal; the concentration of plasma luteinizing hormone (LH) was measured. Increased milk yield was recorded after supplementation with the glucogenic preparation (P < 0.05), but not with β-carotene (P > 0.05). There were no differences in LH concentration during surge release in supplemented ewes; furthermore, there were no differences between groups in body weight and litter size. It is concluded that supplementation of ewes with a glucogenic preparation during mid- to late-lactation may lead to improved milk production. | en |
dc.source | Canadian Journal of Animal Science | en |
dc.source.uri | http://www.scopus.com/inward/record.url?eid=2-s2.0-34547249953&partnerID=40&md5=1585b24ce98f5f483e68671dc196b070 | |
dc.subject | β-carotene | en |
dc.subject | Energy | en |
dc.subject | Luteinizing hormone | en |
dc.subject | Milk yield | en |
dc.subject | Sheep reproduction | en |
dc.subject | Ovis aries | en |
dc.title | Supplementation of lactating ewes with a glucogenic preparation or β-carotene in mid- To late lactation on subsequent milk yield and luteinizing hormone secretion | en |
dc.type | journalArticle | en |
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