Citation
Al-Kirshi, Riyadh Abbas
(2004)
Effect of Supplementing Molybdenum, Molybdenum and Sulphur, and Zinc on Mineral Excretion of Sheep Fed with Palm Kernel Cake.
Masters thesis, Universiti Putra Malaysia.
Abstract
Feeding high levels of palm kernel cake (PKC) has been reported to cause copper
(Cu) toxicity in sheep. The degree of Cu toxicity is generally dependent on type of
sheep breed, the form of Cu in the diets, feeding duration and interaction of Cu with
other nutrients. This study was specifically camed out to investigate the effect of
molybdenum (Mo), sulphur (S) and zinc (Zn) supplementation on the balance of
minerals and to relate the findings with the degree of toxicity in Santa In& x Malin
crossbred sheep.
Twenty male Santa In& x Malin crossbred sheep from 8 months to 1 year of age
were divided randomly into 4 groups. The animals were fed the following diets over
the 6 months experimental period, PKC (86.2%); guinea grass hay (10%)
supplemented with 30 ppm Mo (diet Mo), 20 ppm Mo +lo00 ppm S (diet Mo+S), .
500 ppm Zn (diet Zn) and the control without supplementation (diet Control).
Faecal and urine samples were collected during the digestibility trial for mineral
analysis. Mineral contents were also analyzed in blood plasma samples throughout
the experiment period as well as from liver, kidney, pancreas and bile collected at
slaughter. Mo+S or Mo alone and Zn treatments were observed to reduce the Cu
level in the liver, kidney, pancreas and bile of the sheep. But Mo+S is more
effective in reducing Cu from those tissues, especially the liver. Plasma minerals
results showed that both Zn and Mo+S treatments were more effective in reducing
Cu, Fe and Mg levels over time.
Based on the results of this study, the hepatic Cu content was found to be higher in
control group compared with other treatments. However, Mo+S treatment was
found to be more effective in controlling and lowering Cu levels.
There were significant effect of dietary supplement of Mo+S, Mo and Zn in
increasing the loss of endogenous Cu from the body via faeces and urine.
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