Effect of udder and teat shape and dimensions on the transformed somatic cell count in cows' milk samples
2007
Petkov, P.
The object of the study were 391 cows reared in 5 farms. Their age was I, II and III lactation and they were from the Bulgarian Black-and-White breed. They were the daughters of 46 bulls. The objective of the study was related to establishing the effect of udder and teat shape and dimensions on the transformed somatic cell count in milk cows (log2 SCC). The count was determined in milk samples taken from 1564 udder quarters. The shapes of the udder, teat and teat tip have were presented in 5, 4 and 7 classes respectively. The dimensions were related to the distance of the udder bottom from the floor, the length and thickness of the teats. The teat shape and thickness of the rear teats were factors that had no reliable effect on log2 SCC. The cows with a bath- and cup-shaped udder, with teats with an even or mixed tip produced milk with a lower cell element count and their LSE was negative. The highest log2 SCC was revealed by the animals with a deep udder (up to 50 cm), front teats 7.1 – 8.0 cm long and over 3.1 cm thick. For these classes their LSE values were positive.
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Эту запись предоставил Institute of Agricultural Economics