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Variability of milk productivity, milk composition and quality in sheep of Stara Zagora breed and crossbreds by East Friesian rams at second lactation


Variability of milk productivity, milk composition and quality in sheep of Stara Zagora breed and crossbreds by East Friesian rams at second lactation



Zhivotnov"dni Nauki 32(3-4): 83-86



The purpose of study was to determined variability of milk yield, milk composition and quality in purebred sheep of local Stara Zagora breed and crossbreds by rams of East Friesian breed breeding at the herd of Research Institute for Cattle and Sheep Production - Stara Zagora. It was established that at second lactation milk yield was constant at 3rd, 4th and 5th control record in crossbreds. Decreasing and increasing of milk yield during lactation was more lightly compared by ewe of Stara Zagora breed. The most significant was the change in fat content (%) in both groups during lactation. At second lactation more constant were protein content (%), casein (%) and whey protein (%). The groups did not differ by milk quality at IInd lactation. The milk of crossbreds had better clotting ability during all lactation period.

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