Selenium Levels in Norwegian Dairy Herds Related to Reproductive and Health Performance

Ropstad, Erik; Øvernes, Gunnar; Refsdal, A. O.

doi:10.1080/00015128709436571

Cited by 10 publications

(20 citation statements)

References 13 publications

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“…The results indicate marginal Se status in a higher proportion of Norwegian dairy cows than that observed for vit E. This is not surprising, as farmland and crops are low in Se in most of Norway (Wu & Låg 1988, Øvernes & Frøslie 1992. However, the mean value in this study was 0.05 µg/g above the average reported by Ropstad et al (1987) in 147 lactating cows from 17 normal herds in Norway in April 1985.…”

Section: Vitamin E and Selenium Status Of Norwegian Cowscontrasting

confidence: 43%

“…On the other hand, the observed pattern is in fairly good accordance with the geographical distribution of Se in farmland soil, harvested roughage and sheep tissues (Wu & Låg 1988, Øvernes & Frøslie 1992, Sivertsen 2004). This regional effect may also explain the difference between the mean blood Se value in the present study and the one reported by Ropstad et al (1987). All their samples from normal lactating cows were collected in south-eastern Norway, and their results are not far from the levels recorded in region 1 in this study.…”

Section: Geographical Variationsupporting

confidence: 29%

“…Vit E and Se have been added to commercial concentrates for many years (Frøslie et al 1985). In spite of this, a previous study of 64 Norwegian dairy herds showed a substantial fraction at marginal Se levels (Ropstad et al 1987). Except for a recent study in 14 organic dairy farms (Govasmark et al 2005), systematic investigations of plasma vit E levels in dairy cattle have not been previously published in Norway.…”

Section: Introductionmentioning

confidence: 94%

“…This discrepancy is partly based on different estimates of the relation between blood Se and plasma Se, as all these authors agree that plasma Se levels above 0.07-0.075 µg/ml are adequate. In Norwegian cattle, Ropstad et al (1987) found that a plasma Se concentration of 0.07 µg/ml corresponded on average to a blood Se concentration of 0.13 µg/ml. In the present study, analysis of blood Se was preferred, because blood Se is considered to be the most reliable expression for long-term selenium supply (Scholz & Hutchinson 1979).…”

Section: Vitamin E and Selenium Status Of Norwegian Cowsmentioning

confidence: 99%

“…The practical importance of vit E and Se status for mastitis resistance and reproductive function in cows is more controversial (Radostits et al 2000). Several authors have reported a beneficial effect of vit E and/or Se on mastitis frequency (Smith et al 1984, Braun et al 1991, Malbe et al 1995, while others have failed to confirm such effects (Ropstad et al 1987, Ndiweni et al 1991, Batra et al 1992. Vit E and Se deficiency problems are well known in Norway (Frøslie et al 1980).…”

Section: Introductionmentioning

confidence: 99%

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Sivertsen

Øvernes²,

Østerås

et al. 2005

Acta Vet Scand

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Sivertsen T, Øvernes G, Østerås O, Nymoen U, Lunder T: Plasma vitamin E and blood selenium concentrations in Norwegian dairy cows: Regional differences and relations to feeding and health. Acta vet. scand. 2005, 46, 177-191. -Plasma α-tocopherol (vit E) and blood selenium (Se) concentrations in February were determined in samples from 314 dairy cows in Norway, selected to provide a representative subset of the Norwegian dairy cow population. Each sample was followed by a questionnaire with information about feeding of the cow at the time of sampling. The results were correlated to herd data and to calving and health data for each cow from the Norwegian Dairy Herd Recording System and the Norwegian Cattle Health Recording System. The mean concentrations were 6.9 µg vit E per ml plasma and 0.16 µg Se per g blood. Both levels were highest in mid lactation. Plasma vit E varied with the amount of silage fed to the cow, while blood Se varied with the amount of concentrates and mineral supplements, and with geographical region. No differences in vit E or Se levels were found between cows with recorded treatments for mastitis, parturient paresis or reproductive disorders in the lactation during or immediately prior to sampling, and those without such treatments. For ketosis, a small difference in blood Se was found between the groups with or without recorded treatments. It is concluded that winter-fed lactating cows in Norway had an adequate plasma level of vit E and a marginal-to-adequate level of Se.

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Section: Vitamin E and Selenium Status Of Norwegian Cowscontrasting

confidence: 43%

Section: Geographical Variationsupporting

confidence: 29%

Section: Introductionmentioning

confidence: 94%

Section: Vitamin E and Selenium Status Of Norwegian Cowsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Sivertsen

Øvernes²,

Østerås

et al. 2005

Acta Vet Scand

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Vitamin E supplementation for the ruminant

McDowell

Williams

Hidiroglou

et al. 1996

Animal Feed Science and Technology

148

102

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Maternal and Fetal Selenium Concentrations and Their Interrelationships in Dairy Cattle

Saun

Herdt²,

Stowe

1989

The Journal of Nutrition

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Paired dam-fetus serum, whole blood and liver samples were collected from 101 pregnant dairy cattle at slaughter to establish mean values for fetal tissue selenium concentration and to determine relationships between maternal and fetal selenium status. Samples were assayed for selenium concentration in serum, whole blood and liver and for whole blood glutathione peroxidase (GSH-Px) activity. Fetal age was estimated from fetal crown-to-rump length. Mean fetal liver (2.14 micrograms/g dry wt) and serum (21.4 ng/ml) selenium concentrations and whole blood GSH-Px activity (21.6 mu/ml) differed (P less than 0.0001, 0.0001 and 0.01, respectively) from corresponding maternal values (0.95 micrograms/g liver dry wt; 44.0 ng/ml; 16.7 mu/ml, respectively), while no differences were found between whole blood or erythrocyte selenium concentrations. Fetal liver selenium concentration was greater than corresponding maternal liver selenium in 99% (96/97) of the dam-fetal pairs, suggesting efficient placental transfer and fetal concentrating ability. Maternal liver selenium concentration was most highly correlated to all fetal tissue selenium concentrations and used to develop prediction models. These data suggest that selenium efficiently passes the placenta, and based on published values of adequate adult liver selenium concentrations and maternal-fetal relationships, we suggest an adequate liver selenium concentration in the bovine fetus to be greater than 2.2 micrograms/g liver dry wt, and in whole blood, greater than 120 ng/ml.

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Selenium Levels in Norwegian Dairy Herds Related to Reproductive and Health Performance

Cited by 10 publications

References 13 publications

Untitled

Untitled

Vitamin E supplementation for the ruminant

Maternal and Fetal Selenium Concentrations and Their Interrelationships in Dairy Cattle

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