Trace Minerals for California Beef Cattle
University of California, Cooperative Extension
Napa County Mineral Data
Selenium
Four herds (total of 38 head) were randomly sampled for selenium levels. The overall whole blood selenium level was 0.0428 ppm, which is generally considered deficient. Deficiency is considered less than 0.04 ppm. Individual animal and location differences may result in deficiency in some cattle. Therefore, testing at individual locations would better define specific conditions.
Copper
Four herds (total of 20 head) had an overall serum copper average of 0.76 ppm, which is considered adequate for copper. The interaction with other minerals and individual animal variation will determine the potential for copper deficiency at specific locations. Therefore, individual testing at specific locations is recommended.
Zinc
Insufficient data are available for conclusions.
Phosphorus
Insufficient data are available for conclusions.
|
Blood samples* |
||||
|
WEIGHTED AVERAGES |
||||
|
Se |
Cu |
Zn |
P |
|
|
0.043 |
0.76 |
no data |
no data |
All Values |
|
0.043 |
0.76 |
no data |
no data |
Class 1 data only (random samples) |
|
na |
na |
na |
na |
Class 2 data only (field trials, selected herds) |
|
na |
na |
na |
na |
Class 3 data only (sick cattle) |
|
Number of Individuals (used in weighted averages) |
||||
|
Se |
Cu |
Zn |
P |
|
|
38 |
20 |
0 |
0 |
All Values |
|
38 |
20 |
0 |
0 |
Class 1 data only (random samples) |
|
0 |
0 |
0 |
0 |
Class 2 data only (field trials, selected herds) |
|
0 |
0 |
0 |
0 |
Class 3 data only (sick cattle) |
|
Number of Samples |
||||
|
Se |
Cu |
Zn |
P |
|
|
0 |
0 |
0 |
0 |
No. of Individuals |
|
4 |
4 |
0 |
0 |
No. of Herds |
|
38 |
20 |
0 |
0 |
No. of Individuals in herds |
|
38 |
20 |
0 |
0 |
Total number of individuals |
|
Lowest and Highest Values (Individuals only) |
||||
|
Se |
Cu |
Zn |
P |
|
|
0.0000 |
0.00 |
0.00 |
0 |
Lowest individual value |
|
0.000 |
0.00 |
0.00 |
0 |
Highest individual value |
|
* Se whole blood, Zn & P serum, Cu whole blood or serum |
||||