The content of somatic cells in goat milk during the breeding and nonbreeding seasons
DOI:
https://doi.org/10.28983/asj.y2023i12pp106-110Keywords:
Saanen breed, somatic cells, lactose, milk yieldAbstract
The somatic cell count (SCC) is considered to be an indirect indicator of the hygienic quality of milk, but the content of somatic cells in goat milk may be due to a number of factors unrelated to intramammary infection. The purpose of our study was to determine the SCC for 5-26 weeks of lactation in Saanen goats of the second lactation in connection with milk yield, the mass fraction of lactose in milk (MFL) and taking into account the breeding season. The analyzed group was formed from 22 females of spring lambing (April). The results of our study showed that at 5-18 weeks lactation, before the start of the breeding period, the dynamics of SCC as a whole was similar to the change in daily milk yield (DA). From 17-18 weeks. up to 21-22 weeks and further up to 25-26 weeks DA decreased by 1.2-1.3 times (p<0.01 and p<0.001). But SCC for 21-22 weeks of lactation (peak breeding season) increased by 1.7 times (p<0.01) and significantly exceeded 1000 ? 103 units/ml. At 25-26 weeks of lactation, a decrease in SCC by 1.4 times (p<0.05) was found out, but on average the content of somatic cells remained at the level of 1000 ? 103 units/ml. The lactose content had a negative trend throughout lactation, and no correlation was found out between MFL and SCC. We assume that the increase in SCC in the last months of lactation is a consequence of changes in the hormonal background in the breeding season.
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