Effects of Different Selenium Sources on Performance, Carcass Characteristics, Plasma Glutathione Peroxidase Activity and Selenium Deposition in Finishing Hanwoo Steers

Lee, S. H.; Park, B. Y.; Yeo, Joon Mo; Lee, Sung S.; Lee, J. H.; Ha, Jong K.

doi:10.5713/ajas.2007.229

Cited by 13 publications

(12 citation statements)

References 32 publications

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“…In the current study, supplementation with Se or vitamin E had no effect on DMI. This is consistent with previous studies indicating that there is no beneficial effect of dietary Se and vitamin E on feed intake in sheep (Rock et al, 2001;Qin et al, 2007;Kumar et al, 2009) or dairy cattle (Lee et al, 2007;Ebrahimi et al, 2009;Covey et al, 2010) under TNC. However, the interaction between dietary Se plus vitamin E and high environmental temperature on feed consumption in sheep has not previously been investigated.…”

Section: Discussionsupporting

confidence: 93%

Effects of selenium and vitamin E on performance, physiological response, and selenium balance in heat-stressed sheep1

Alhidary

Shini

Jassim

et al. 2015

Journal of Animal Science

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Forty-two 7-mo-old Australian Merino wethers were used in a 50-d trial to investigate the effects of Se and vitamin E on the performance and physiological responses of heat-stressed sheep. Sheep were exposed to thermoneutral conditions (maximum = 24°C and minimum = 20°C) for 28 d followed by heat (maximum = 38°C and minimum = 28°C) for 22 d. Hot conditions were imposed between 0700 and 1800 h. Sheep were randomly allocated to diets containing 0.8 mg/kg Se (Sel-Plex), 150 mg/kg vitamin E, or 0.8 mg/kg Se and 150 mg/kg vitamin E for either the duration of the study (50 d) or from d 1 of the hot period until the end of the study. A control group that received no supplemental Se and vitamin E for the duration of the study was included. Feed intake was measured daily and sheep were weighed weekly. Blood samples were collected from all sheep before feeding on d 1, 21, and 49 for measurement of biochemical and enzymatic variables. The concentration of Se was determined in offered and refused feed, feces, urine, water, plasma, liver, and kidneys. Exposure to heat reduced ( < 0.05) DMI by 11.9%, ADG by 198 g, serum concentration of urea nitrogen and Se by 17.8%, and plasma total antioxidant status by 26.4%. During hot conditions, sheep receiving Se and vitamin E supplements for 50 d had reduced ( < 0.05) BW loss and elevated G:F compared to control sheep. Serum Se concentration and the plasma total antioxidant status were greatest in sheep receiving Se and vitamin E supplements for 50 d ( < 0.05). These results indicate that dietary supplementation with Se and vitamin E reduces the adverse effects of a high heat load. Additional studies are warranted to elucidate the mechanisms responsible for these effects.

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Section: Discussionsupporting

confidence: 93%

Effects of selenium and vitamin E on performance, physiological response, and selenium balance in heat-stressed sheep1

Alhidary

Shini

Jassim

et al. 2015

Journal of Animal Science

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“…In the current study, there was no observed difference in DMI between sheep injected with Se and control sheep during heat stress, which is consistent with previous reports that dietary Se source and amount of Se supplementation do not affect DMI under thermoneutral conditions in sheep (Rock et al, 2001;Qin et al, 2007;Kumar et al, 2009;Vignola et al, 2009) or calves (Lee et al, 2007;Ebrahimi et al, 2009;Covey et al, 2010). However, Sahin and Kucuk (2001) reported that DMI was increased when Japanese quail were fed a diet supplemented with 0.3 mg Se/kg DM for 90 d and subjected to high ambient temperature (34°C).…”

Section: Discussionsupporting

confidence: 93%

Effect of various doses of injected selenium on performance and physiological responses of sheep to heat load1

Alhidary

Shini

Jassim

et al. 2012

Journal of Animal Science

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The aim of the study was to determine the effects of various doses of injected Se on the physiological responses of sheep to heat load. Fifteen 9-mo-old Australian Merino wethers (mean BW = 27.2 ± 2.1 kg) were randomly assigned to 1 of 3 treatments: 0 (control), 0.5, and 5 mg of Se, which was administered as a subcutaneous sodium selenate injection (5 mg/mL Se) on d 1, 8, and 15 of exposure to heat stress. The animals were housed individually in an environmental chamber and exposed to high temperature from 0700 to 1800 h (maximum = 38°C; minimum = 24°C) and to thermoneutral temperature from 1800 to 0700 h (maximum = 24°C; minimum = 20°C) for 21 d. Rectal temperature (RT) and respiration rate (RR) were measured daily at 0800, 1200, and 1600 h. Feed intake was measured daily, and sheep were weighed on d 1, 8, 15, and 21. Blood samples were collected on d 1 and 21. The 5 mg Se treatment decreased RT by 0.3°C (P = 0.02) and BW loss by 4.5% (P < 0.05) and increased eosinophil count (P < 0.05). There were no differences (P > 0.05) between treatments in RR and DMI, serum concentrations of glucose, total protein, cholesterol, and NEFA or in blood hematology variables. The findings of this study have important implications for the sheep industry. Further studies are warranted to elucidate the dynamics of Se on productivity and health during hot conditions.

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“…This increased selenium concentration was highly significant even in this small trial with only 13 plus 7 animals in the organic and inorganic groups respectively. The higher concentration in meat is in accordance with trials that compared organic and inorganic selenium sources in other species; organic selenium was superior to inorganic selenium in increasing the selenium content in meat of cattle [ 19 , 26 ] and swine [ 27 , 28 ]. The male lambs were randomly allocated to organic or inorganic selenium supplement irrespective of what their mothers had received before lambing six months ago.…”

Section: Discussionsupporting

confidence: 85%

Organic selenium supplementation increased selenium concentrations in ewe and newborn lamb blood and in slaughter lamb meat compared to inorganic selenium supplementation

Steen

Strøm²,

Bernhoft

2008

Acta Vet Scand

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Effects of Different Selenium Sources on Performance, Carcass Characteristics, Plasma Glutathione Peroxidase Activity and Selenium Deposition in Finishing Hanwoo Steers

Cited by 13 publications

References 32 publications

Effects of selenium and vitamin E on performance, physiological response, and selenium balance in heat-stressed sheep1

Effects of selenium and vitamin E on performance, physiological response, and selenium balance in heat-stressed sheep1

Effect of various doses of injected selenium on performance and physiological responses of sheep to heat load1

Organic selenium supplementation increased selenium concentrations in ewe and newborn lamb blood and in slaughter lamb meat compared to inorganic selenium supplementation

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