Abstract
Selenium (Se) deficiency occurs commonly in California grazing cattle and has been associated with reduced immune function and, in some studies, reduced weight gain. Multiple methods of supplementing Se are available, but little research has compared the effects of these methods on whole blood Se levels and weight gain. In two trials, we evaluated four methods of Se supplementation - an intrarumenal bolus, two injectable preparations and a loose salt containing 120 ppm Se - over an 85- to 90-day period in Se-deficient yearling cattle in Tehama County. The bolus treatment raised whole blood Se levels to an adequate level (0.08 ppm) for the entire study period. Whole blood Se concentrations in injected cattle initially reached adequate levels but then declined to deficient levels. The loose salt treatment acted slowly, with average whole blood Se concentration reaching adequate levels at the end of the study period. None of the treatments significantly affected weight gain and Se blood concentration was not correlated with weight gain. In growing cattle, it appears that Se supplementation may be viewed not as a direct driver of weight gain, but rather as similar to vaccination, in that it can prevent health problems that might otherwise lead to reduced weight gain.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 187-193 |
| Number of pages | 7 |
| Journal | California Agriculture |
| Volume | 70 |
| Issue number | 4 |
| DOIs | |
| State | Published - Oct 1 2016 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Forestry
- Agronomy and Crop Science
- Plant Science
Cite this
Efficacy of selenium supplementation methods in California yearling beef cattle and resulting effect on weight gain. / Davy, Josh; Forero, Larry; Tucker, Thomas; Mayo, Christie; Drake, Daniel; Maas, John; Oltjen, James.
In: California Agriculture, Vol. 70, No. 4, 01.10.2016, p. 187-193.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Efficacy of selenium supplementation methods in California yearling beef cattle and resulting effect on weight gain
AU - Davy, Josh
AU - Forero, Larry
AU - Tucker, Thomas
AU - Mayo, Christie
AU - Drake, Daniel
AU - Maas, John
AU - Oltjen, James
PY - 2016/10/1
Y1 - 2016/10/1
N2 - Selenium (Se) deficiency occurs commonly in California grazing cattle and has been associated with reduced immune function and, in some studies, reduced weight gain. Multiple methods of supplementing Se are available, but little research has compared the effects of these methods on whole blood Se levels and weight gain. In two trials, we evaluated four methods of Se supplementation - an intrarumenal bolus, two injectable preparations and a loose salt containing 120 ppm Se - over an 85- to 90-day period in Se-deficient yearling cattle in Tehama County. The bolus treatment raised whole blood Se levels to an adequate level (0.08 ppm) for the entire study period. Whole blood Se concentrations in injected cattle initially reached adequate levels but then declined to deficient levels. The loose salt treatment acted slowly, with average whole blood Se concentration reaching adequate levels at the end of the study period. None of the treatments significantly affected weight gain and Se blood concentration was not correlated with weight gain. In growing cattle, it appears that Se supplementation may be viewed not as a direct driver of weight gain, but rather as similar to vaccination, in that it can prevent health problems that might otherwise lead to reduced weight gain.
AB - Selenium (Se) deficiency occurs commonly in California grazing cattle and has been associated with reduced immune function and, in some studies, reduced weight gain. Multiple methods of supplementing Se are available, but little research has compared the effects of these methods on whole blood Se levels and weight gain. In two trials, we evaluated four methods of Se supplementation - an intrarumenal bolus, two injectable preparations and a loose salt containing 120 ppm Se - over an 85- to 90-day period in Se-deficient yearling cattle in Tehama County. The bolus treatment raised whole blood Se levels to an adequate level (0.08 ppm) for the entire study period. Whole blood Se concentrations in injected cattle initially reached adequate levels but then declined to deficient levels. The loose salt treatment acted slowly, with average whole blood Se concentration reaching adequate levels at the end of the study period. None of the treatments significantly affected weight gain and Se blood concentration was not correlated with weight gain. In growing cattle, it appears that Se supplementation may be viewed not as a direct driver of weight gain, but rather as similar to vaccination, in that it can prevent health problems that might otherwise lead to reduced weight gain.
UR - http://www.scopus.com/inward/record.url?scp=85006507832&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85006507832&partnerID=8YFLogxK
U2 - 10.3733/ca.2016a0016
DO - 10.3733/ca.2016a0016
M3 - Article
AN - SCOPUS:85006507832
VL - 70
SP - 187
EP - 193
JO - California Agriculture
JF - California Agriculture
SN - 0008-0845
IS - 4
ER -