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Titolo:
Enhanced reproductive performance of ewes given a sustained-release multi-trace element/vitamin ruminal bolus
Autore:
Hemingway, RG; Parkins, JJ; Ritchie, NS;
Indirizzi:
Univ Glasgow, Sch Vet, Dept Vet Clin Studies, Glasgow, Lanark, Scotland Univ Glasgow Glasgow Lanark Scotland Studies, Glasgow, Lanark, Scotland
Titolo Testata:
SMALL RUMINANT RESEARCH
fascicolo: 1, volume: 39, anno: 2001,
pagine: 25 - 30
SICI:
0921-4488(200101)39:1<25:ERPOEG>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
SELENIUM STATUS; CATTLE; ELEMENT;
Keywords:
ewes; reproductive performance; trace element/vitamin bolus supplementation; blood copper; blood glutathione peroxidase;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
23
Recensione:
Indirizzi per estratti:
Indirizzo: Hemingway, RG Univ Glasgow, Sch Vet, Dept Vet Clin Studies, Glasgow, Lanark, Scotland Univ Glasgow Glasgow Lanark Scotland gow, Lanark, Scotland
Citazione:
R.G. Hemingway et al., "Enhanced reproductive performance of ewes given a sustained-release multi-trace element/vitamin ruminal bolus", SMALL RUMIN, 39(1), 2001, pp. 25-30

Abstract

A sustained-release multi-trace element/vitamin bolus has been devised foradministration to ewes in advance of mating. Each bolus contained 5.3 g Cu, 50 mg Se, 90 mg Co, 100 mg 1, 3.2 g Mn and 4.7 g Zn with 268 x 10(3) IU Vitamin A, 54 x 10(3) IU Vitamin D and 800 IU Vitamin E, About 50% of each nutrient is released during the first 6 weeks. Thereafter the release rate slows and over the remaining life of the bolus (about 6 months extending to lambing time) the daily release rates are about 15 mg: Cu, 0.1 mg Se, 0.2 mg Co, 0.3 mg 1, 9.4 mg Mn and 13 mg Zn with 775 IU Vitamin A, 156 IU Vitamin D and 2 IU Vitamin E, In one study the proportion of twins born to ewes given the bolus was very significantly (P < 0.001) higher than for the untreated ewes and greater than for those given a copper injection or copper oxide needles. In a second study the proportion of ewes given a bolus and having twin lambs was significantly (P < 0.01) greater than for untreated ewes and significantly (P < 0.05) fewer ewes were non-pregnant. Tn a third study, giving a bolus to shearling eu;es tended (P = 0.06) to result in fewer non-pregnant animals: than for those untreated. Blood copper and Vitamin B-12concentrations and glutathione peroxidase activities were above normal values throughout. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/01/20 alle ore 12:26:58