The Macro and Micro Minerals Content of Serum and Milk of Local and Cross Bred Goats

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Date
2015-06-23
Authors
Ishraga Gaafar Ibrahim, Ibrahim
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UOFK
Abstract
The present study was conducted to determine macro and micro- mineral content in serum and milk of local bred goats (Nubian) and cross bred goats (Saanen X Nubian) under different ages < 3 and > 3 years, stages of lactation (early, mid and late lactation) and pregnancy (second half of pregnancy). The minerals studied were calcium (Ca), phosphorus (P), magnesium (Mg), Sodium (Na), potassium (K), Zinc (Zn), copper (Cu) and manganese (Mn). The results revealed that the breed of the animal had no significant effect on mineral concentration in serum and milk except for Ca, where local breed goats milk was higher than the cross bred goats. Age affects only K concentration in serum. During lactation period, Ca, P and Na concentrations in serum showed different trends in the two breeds. In local breed goats, Ca and P concentrations significantly (P < 0.05) decreased in late lactation, while in cross bred goats, the concentrations were similar during lactation periods. Na concentration was also similar in all lactation periods in local breed, while it significantly (P < 0.05) increased in late lactation in cross bred goats. Mg, Zn and Cu concentration in serum showed similar trends in both breeds, in which Mg significantly (P < 0.05) decreased in late lactation, Zn was similar during all the lactation period and Cu significantly increased in mid lactation and then decreased in late lactation. Pregnant goat sera in both breeds were significantly (P < 0.05) higher in P, Zn and lower in K concentration than the lactating ones. Ca concentration in milk of local breed goats were similar in early and mid lactation and significantly (P < 0.05) decreased in late lactation, while in the cross bred goats the concentration was similar in all stages of lactation. P, Na, K, Zn, Cu and Mn concentrations in milk showed similar trends in both breeds in which P and Na were similar in all stages of lactation. Zn and Mn significantly (P < 0.05) decreased with advance in lactation, K decreased in mid lactation then significantly (P < 0.05) increased in late lactation and Cu concentration was similar in early and mid lactation then significantly (P < 0.05) decreased in late lactation.
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The Macro and Micro Minerals Content of Serum and Milk of Local and Cross Bred Goats.
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