29 



10 20 30 40 50 60 70 80 



Days on trial 



FIGURE 3-3. Mean serum Cu for cattle supplemented with 

 different sources of Zn . SEM (|ig/ml) for d 1 .20, d 3 .15, d 

 14 .18, d 28 .21, d 42 .24, d 56 .16, d 70 .24, d 84 .16. 



TABLE 3-2. Mean Zn concentrations in tissues of cattle 

 supplemented with three sources of Zn (mg/kg, DMB a ) 



Tissue' 1 ' 



Control 



ZnMet 



ZnS0 4 



ZnO 



SEM 



Bone d 



60 



60 



61 



62 



8 



Bone Marrow" 



143 



137 



133 



133 



22 



Cornea 



2.8 



2.3 



3.2 



2.8 



.97 



Skin 



1.9 



1.5 



1.8 



2 .2 



1.4 



Hair 



86 



88 



86 



84 



8 



Hoof 



77 



74 



70 



81 



10 



Kidney 



72 



67 



69 



69 



5 



Liver 



111 



116 



118 



114 



18 



Muscle d 



190 



179 



182 



192 



25 



Pancreas 



65 



66 



66 



62 



10 



a DMB= Dry matter basis, bone also fat free, cornea and skin on wet 



basis . 



b No difference among treatments (P > .05) 



c Metacarpus . 



d Sterno mandibularis . 



