DETERMINING THE MINERAL REQUIREMENT OF DAIRY CATTLE
DETERMINING THE MINERAL REQUIREMENT OF DAIRY CATTLE
DETERMINING THE MINERAL REQUIREMENT OF DAIRY CATTLE
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Diagnosing Trace Mineral Deficiency in Adult Cattle<br />
Mineral Tissue Normal Subclinical Clinical<br />
Cobalt Serum Vit. B12 (ng/ml) > 0.4 .25 - .4 < 0.2<br />
Serum methylmalonic acid<br />
(µmol/L)<br />
56<br />
< 1.5 2.5 - 5 >5<br />
Copper *Liver (ppm DM) 100 - 400 40 - 100 < 40<br />
Serum Ceruloplasmin (IU/L) 40 - 50 10 - 30 < 5<br />
RBC - Cu-Zn superoxide dismutase<br />
(mg/g hemoglobin)<br />
> 0.3 < 0.3<br />
Iodine Serum (µg/dL) 10 - 50 5 - 10 < 5<br />
Serum thyroxine (ng/ml) 20 - 100 < 10<br />
* Milk (µg/L) 30 - 300 < 10<br />
Iron Blood PCV 33 % < 25 < 20<br />
Liver (ppm DM) 200 - 1500 < 150<br />
Manganese Liver (ppm DM) 10 - 25 < 4<br />
Selenium *EDTA whole blood (µg/ml) 0.2 - 1 0.1 - 0.2 < 0.1<br />
Serum (µg/ml) = poor test 0.08 - 0.2 0.04 - 0.06 < 0.03<br />
Blood GSH-Peroxidase<br />
(µmoles/min/mgHemoglobin)<br />
20 - 35 10 - 20 < 10<br />
* Liver (ppm DM) 0.25 - 0.60 < 0.15<br />
Zinc Liver (ppm DM)<br />
poor but best<br />
* = good test<br />
Tissue DM is about 25% of wet weight<br />
100 - 400 50 - 150?? < 50
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