ANALYSIS OF THE RELATIONSHIP BETWEEN SOMATIC CELL COUNT AND FERTILITY IN HOLSTEIN-FRIESIAN COWS
Journal Title: Acta Scientiarum Polonorum Zootechnica - Year 2017, Vol 16, Issue 4
Abstract
Somatic cell counts (SCC) in milk from test-day records obtained until 30 days before the first service were analyzed in relation to service efficacy, calving interval (CI), days open (DO) and services per conception rate (S/C). Statistical analysis (GLM, FREQ, CORR of the SAS package) involved 28,078 test-day records from 17,618 HF cows, which calved between 2011–2014. Significant (P ≤ 0.001) correlations were found between SCC and the fertility indices. First service successful conception was found to decrease by approx. 6% with an increase in SCC in milk. Increased SCC was accompanied by an extended calving interval (by 3 days) and days open (by 6 days), as well as by an increased S/C rate, from 1.99 in cows with SCC <100,000 cells ∙ ml–1 to 2.03 in cows with SCC >1,000,000 cells ∙ ml–1. This relationship was confirmed by positive coefficients of correlation between SCC vs. CI, DO and S/C. Dairy cattle producers should monitor SCC in milk, also because its possible increase may have a detrimental effect on the overall fertility of the herd.
Authors and Affiliations
Weronika Kulpa, Anna Sawa, Małgorzata Jankowska
Keywords
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- EP ID EP380536
- DOI 10.21005/asp.2017.16.4.05
- Views 88
- Downloads 0
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