A Response of Sheep to Cobalt Supplementation in South-eastern Queensland
نویسندگان
چکیده
Two separate experiments were conducted with sheep‘ grazing Pangola grass pastures. In the first experiment, eight groups of pregnant ewes (six ewes/group) were used. Each group received one of the following supplements, no supplement (control), phosphorus, sodium, iodine, cobalt, mineral mixture, sorghum grain and sorghum grain plus urea. Ewes supplemented with cobalt lost less weight during lactation and their lambs showed a higher and more sustained growth than did ewes or lambs from the other groups. In the second experiment, one group of weaned lambs (27) was drenched fortnightly with cobalt and their growth compared with a similar group of unsupplemented controls. All lambs given cobalt increased in live weight during which time 52% of the control lambs died. Evidence is presented which suggests that cobalt deficiency was the primary cause of the high mortality rate.
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