Izvorni znanstveni članak
More important characteristics of the ewe's milk structure in Rtanj pasture area with a special view to the milk mineral matters
Dragoslava Mišić
; Poljoprivredni fakultet, Nemanjina 6, 11080 Beograd, Srbija
Dušica Petrović
Sažetak
The chemical structure of ewe's milk has been investigated in Rtanj pasture area during the lactation period from April to October. A special importance has been given to the study of mineral matters in milk with a special view to the macro and micro elements. Based upon the investigation results it is possible to draw the following conclusions: The total dry matter changes and the basic milk ingredients have a pronounced growing tendency during the lactation period. The total dry matter growth amounted to 30.87 %, dry matter without fat 14.57 %, milk fat 55,89 % and the ash 33 %; By comparison of each ingredient quantity in the ewe's milk from various areas the differences have been stated; From the investigated macro elements the ewe's milk has the largest quantity of calcium, potassium, sodium and the least-magnesium; All elements, except magnesium, show a clear tendency of increase during the lactation period; At the end of the lactation period the quantity of sodium, comparatively, increases more than the potassium quantities which shows their correlative relation (K/Na - April, 3.70, October 3.05); Quantities of each microelement in ewe's milk are very different. Mostly there is zinc, then iron, cooper, less of all mangane and the least - cobalt. The quantity of most elements in ewe's milk increased during the lactation period 2 to 3 times, while the zinc quantities decreased several times. Only cobalt quantities in milk do not show larger differences which could be explained by the effect of the lactation period. The differences in zinc, iron and copper contents in ewe's milk were found out and that can be explained by the soil characteristics and the effect of different grass mass contents. Compared to cow's milk, the ewe's milk is a richer source of microelements.
Ključne riječi
ewe's milk; characteristics; mineral matters; Rtanj pasture area
Hrčak ID:
109462
URI
Datum izdavanja:
1.8.1976.
Posjeta: 908 *