Selenium Supplements in Salt for Sheep

Ullrey, D. E.; Light, Merle R.; Brady, Paul S.; Whetter, P. A.; Tilton, J. E.; Henneman, H. A.; Magee, W. T.

doi:10.2527/jas1978.4661515x

Cited by 19 publications

(3 citation statements)

References 5 publications

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“…Numerous studies have investigated the effects of feeding supplemental Se, primarily the inorganic salts sodium selenite and selenate, to livestock with the goal of preventing Se deficiency ( − ). Relatively few studies have examined Se accretion in beef of animals fed feedstuff sources of Se such as high Se hay or wheat.…”

Section: Discussionmentioning

confidence: 99%

Selenium Accumulation in Beef: Effect of Dietary Selenium and Geographical Area of Animal Origin

Hintze

Lardy

Marchello

et al. 2002

J. Agric. Food Chem.

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Selenium (Se) is an essential nutrient with multiple human health benefits; the single most important dietary source of Se is beef. The Se content of beef varies, and cattle fed a high selenium diet may have Se concentrations in beef that are well above average. Such beef is potentially a unique supplemental source of dietary Se. To examine factors affecting Se accumulation in beef, 16 steers (initial wt 374.4 +/- 33.7 kg) were taken from seleniferous or nonseleniferous areas and fed in a 2 x 2 factorial design with diets high or moderate in Se (11.9 or 0.62 mg Se/kg diet). Diets contained 50% alfalfa, 25% wheat, and 25% corn on a dry matter basis. All dietary Se was from agricultural products, and Se in the high Se diet was primarily from high Se wheat and alfalfa hay. A loin muscle biopsy was taken at the start of the trial to determine initial Se content of beef. Steers were slaughtered after 14 weeks of the trial, and edible carcass (round, sirloin, shoulder clod, and ribeye) and organ samples were collected. Diets did not affect growth or feed intake (P > 0.05), and Se toxicity signs were not observed. Different cuts of meat had similar Se concentrations, and the Se content of all cuts was increased by both high dietary Se and high Se background. Except for liver and kidney, Se in tissues was increased by seleniferous background (P < 0.02) and high dietary Se (P < 0.001). Kidney Se concentrations of animals fed the high Se diet were lowest in animals from seleniferous areas (P = 0.04), suggesting a possible adaptation to the high Se diet. These results demonstrate that cattle fed diets high in Se from agricultural products will accumulate substantial amounts of Se in the beef without developing signs of Se toxicity and that prior Se status regulates Se accumulation in some organs. They further demonstrate that management practices may be altered so as to make beef a significant source of dietary Se.

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Section: Discussionmentioning

confidence: 99%

Selenium Accumulation in Beef: Effect of Dietary Selenium and Geographical Area of Animal Origin

Hintze

Lardy

Marchello

et al. 2002

J. Agric. Food Chem.

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“…Data for plasma and serum selenium concentrations published in the literature are highly variable. Thus, Ullrey et al (1978) found 25 -53 mgSe/L (selenium deficient) in samples of sheep blood plasma from Michigan. Samples from North Dakota (Se adequate) contained 160-170 mgSe/L.…”

Section: Discussionmentioning

confidence: 97%

Selenium status of sheep and their lambs in the Northern Serbian province of Vojvodina

Pešut¹,

Jovanovic²,

Gvozdić³

et al. 2004

Acta vet. (Beogr.)

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The blood plasma concentrations of selenium and plasma and whole blood GSH-Px activities were determined in 30 sheep on three farms (A=Kać, B=Ečka and C=Čoka) in marginally deficient areas of Vojvodina. Selenium concentrations in feedstuffs from the territories surrounding the studied farms were lower than 0.10 ppm in more than 90% of the samples. Plasma selenium concentrations in sheep from farms A, B and C were 83.44 ± 19.09 μg/L; 183.90 ± 37.10 μg/L and 82.14±25.09 μg/L respectively. Plasma GSH-Px activity was the lowest on farm B (0.70 ± 0.37 μkat/L), nonsignificantly higher on farm A (0.81 ± 0.40 μkat/L) and highest on farm C (1.66 ± 0.88 μkat/L). Mean whole blood GSH-Px activities ranged between 194.38 μkat/L (farm C) and 236.51 μkat/L (farm B). On farm A the blood plasma concentrations of selenium and plasma and whole blood GSH-Px activities were determined also in suckling lambs in relation to their mothers. Plasma selenium content in lambs (50.58 ± 10.06 μg/L) was lower than in adult sheep at the same location. Both plasma (0.81 ± 0.40 μkat/L) and whole blood (424.21 ± 117.19 μkat/L) GSH-Px activities were significantly higher in lambs compared to their dams

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“…These authors reported that pastured ewes consumed on average about 3 g of salt per day. Ullrey et al (5) fed either high or low selenium rations to ewes which also had access to salt containing 0,30,65, or 170 ppm selenium. Salt consumption varied widely in ewes (2-14 g/day) and lambs (1.5-19 g/day), but at all levels of supplementation it proved safe and effective in preventing subclinical selenium deficiency.…”

Section: Introductionmentioning

confidence: 99%

Selenised compressed salt blocks for selenium deficient sheep

Money

Meads²,

Morrison³

1986

New Zealand Veterinary Journal

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Salt blocks containing 30 or 120 ppm selenium were tested as the sole supplement for sheep farmed in a selenium-deficient area of New Zealand (Te Anau). Both concentrations were unsatisfactory in preventing selenium deficiency. In five trials using 120 ppm Se salt, the highest percentages of sheep found to be deficient were 31% (lambs) and 32% (ewes). If sheep which were classed as marginally deficient were included these percentages became 63% (lambs) and 56% (ewes). Some instances of selenium-responsive unthriftiness in lambs were encountered, and in one trial there was the possibility of selenium-responsive infertility having contributed to the low lambing performance of the ewes. There was no evidence of white muscle disease. Selenium levels in the liver and kidney were well below the permitted maximum. Because selenised salt failed to eliminate selenium deficiency, its use as a sole supplement for sheep grazing selenium deficient pasture is not recommended.

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Selenium Supplements in Salt for Sheep

Cited by 19 publications

References 5 publications

Selenium Accumulation in Beef: Effect of Dietary Selenium and Geographical Area of Animal Origin

Selenium Accumulation in Beef: Effect of Dietary Selenium and Geographical Area of Animal Origin

Selenium status of sheep and their lambs in the Northern Serbian province of Vojvodina

Selenised compressed salt blocks for selenium deficient sheep

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