Abstract
Comparison between Synthetic population Bulgarian milk (SPBM) and East-Friesian (EF) sheep was done for laboratory yield of cheese and milk composition. The comparison of the means for the individual laboratory yield of cheese showed significantly higher values in the ewes of SPBM on first lactation (2,4735 g) compared to the EF breed (1,7608 g), (P<0,001). The higher amount of cheese probably was connected with the tendency for higher content of the fat, protein and dry matter. However on the second lactation the two breeds showed the same values: SPBM 1,9370 g and EF breed 1,9282 g. No significant differences in the quantity of milk and its composition between the sheep on first and second lactation were observed for both breeds.
Highlights
In Bulgaria the sheep milk is widely used to cheese production
A study was conducted with two groups of dairy sheep reared in different areas of the Balkan. 20 ewes (10 of first lactation and 10 of second lactation) of Synthetic population Bulgarian milk (SPBM) in IAS (Institute of Animal Science), Kostinbrod, Bulgaria and 20 ewes (10 of first lactation and 10 of second lactation) of the East-Friesian breed (EF) in IAS (Institute of Animal Science), Skopje, Macedonia, were investigated in order to study the test day milk, composition and individual laboratory yield of cheese (ILYC)
No significant differences in the quantity of milk and its composition between the sheep on first and second lactation were observed
Summary
In Bulgaria the sheep milk is widely used to cheese production. There are many investigations on the effect of some factors on milk production and milk characteristics (Dimov, 1995; Djorbineva et al, 1995; Petrova and Nedelchev, 2000; Pacinovski et al, 2000). At the present time the milk composition is not a factor influencing the price of milk. It is an important factor determining its yield and quality of the final products (Oravcova et al, 2007). The method for determination of individual laboratory yield of cheese was worked up in the sheep breeding. The information for used of the method for estimation of individual laboratory yield of cheese in sheep breeding is very limited, but this method is very important for practice and sheep selection like a selection criterion (Othmane et al, 2002b). In this connection the information for individual laboratory yield of cheese in sheep from different breeds is very useful
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