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 | 0008-3984 | |
dc.identifier.uri | http://hdl.handle.net/11615/26479 | |
dc.description.abstract | The effects of a glucogenic preparation (Nutrimix((R))) or beta-carotene (Rovimix((R)) 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 P-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 beta-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 | <Go to ISI>://WOS:000247122300008 | |
dc.subject | sheep reproduction | en |
dc.subject | milk yield | en |
dc.subject | beta-carotene | en |
dc.subject | energy | en |
dc.subject | luteinizing | en |
dc.subject | hormone | en |
dc.subject | PROPYLENE-GLYCOL | en |
dc.subject | DAIRY-COWS | en |
dc.subject | OVARIECTOMIZED EWES | en |
dc.subject | GROWTH-HORMONE | en |
dc.subject | GLUCOSE | en |
dc.subject | PROGESTERONE | en |
dc.subject | REPRODUCTION | en |
dc.subject | GONADOTROPIN | en |
dc.subject | ENERGY | en |
dc.subject | SHEEP | en |
dc.subject | Agriculture, Dairy & Animal Science | en |
dc.title | Supplementation of lactating ewes with a glucogenic preparation or beta-carotene in mid- to late lactation on subsequent milk yield and luteinizing hormone secretion | en |
dc.type | journalArticle | en |