MINERAL CONTENT OF MILK FROM DAIRY SHEEP
BREEDS
Tanja
Ivanova1, Nikola Pacinovski2, Emilija Raicheva1,
Desislava Abadjieva1
1Institute of Animal Science, Kostinbrod, Bulgaria
2“Ss. Cyril and Methodius“ University in
Skopje, Institute of Animal Science,
Bul. Ilinden 92a, MK-1000 Skopje, Republic of Macedonia
emilyr@abv.bg
The aim of the present study was to determine the
mineral content of milk from three dairy populations of sheep: the
synthetic population Bulgarian milk, the East-Friesian and the Awassi
breeds. 97 sheep of the Synthetic population Bulgarian milk in the IAS (Institute of Animal
Science) – Kostinbrod, Bulgaria, 92 sheep from the East-Friesian
breed and 67 sheep from the Awassi breed in the IAS (Institute of Animal
Science) – Skopje,
Macedonia,
were investigated. The milk samples were taken and analyzed on every
20-th day, during a period of 100 days (the Spring inc. both
raised indoors and in pasture for the Synthetic population
Bulgarian milk and the Awassi, but the East-Friesian breed was raised
only indoors). The contents of major elements calcium (Ca) and phosphorus
(Р) were determined in IAS – Kostinbrod by the colorimetric method with
the mixed fuel gauge for calcium and on the base of the reaction to РО4(–3)
by (NH4)2MoO4 for phosphorus. The trace
elements content – lead (Pb), cadmium (Cd), arsenic (As), copper (Cu),
iron (Fe) and manganese (Mn) was determined by the Atom Absorbing System
in the Central laboratory of veterinary – Sanitary investigation and
ecology, Sofia, Bulgaria. The ratio of calcium and phosphorus was
accounted. The data were calculated by variation statistic methods by the
computer programme Excel 2003. The contents of calcium and phosphorus in
the milk of the sheep of the Synthetic population Bulgarian milk (150 mg/100 g, and 125.78 mg/100
g), the East-Friesian (155.8 mg/100 g and 150.29 mg/100 g) and the Awassi (139.4 mg/100 g and 163.95 mg/100 g) were established. The ratio Ca : P
was in the optimum borders for the milk sheep of the Synthetic population
Bulgarian milk and the East-Friesian breed (1.19 and 1.05) and it was
lower for the Awassi breed (0.85). The established content of trace
elements in the milk from the studied breeds is lower than the
permissible one for the raw sheep milk. The obtained results for the
mineral content of the sheep milk from the three breeds, breeding in the
different areas of the Balkan, characterized it as an appropriate raw
material for the production of dairy products that are healthful for the
human milk products.
Key words:
dairy sheep; mineral content; major elements; trace elements
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