Association of postpartum hypocalcemia with early-lactation milk yield, reproductive performance, and culling in dairy cows

Journal of Dairy Science
P L VenjakobS Borchardt

Abstract

Periparturient hypocalcemia is frequently observed and considered as a gateway disease that is associated with various health issues. The objective of this study was to evaluate the association of hypocalcemia with early-lactation milk yield, reproductive performance, and culling across a large number of different managerial systems. A prospective cohort study was conducted based on a convenience sample of 125 dairy herds from 8 federal states of Germany between February 2015 and August 2016. A blood sample was drawn from 1,709 animals within 48 h after parturition and analyzed for serum calcium concentration. After discarding cows (n = 283) with missing data, a total of 1,426 cows were considered for final analyses. The median time from calving to sampling was 14.0 h (interquartile range = 5.0-24.9 h). For each herd, a record of the herd management software was requested 150 d after the last cow was sampled. Serum calcium concentration of each cow was associated with early-lactation milk yield (Dairy Herd Improvement Association equivalent test 1 to 3), reproductive performance [days in milk (DIM) at first artificial insemination (AI), pregnancy at first AI, time to pregnancy within 150 DIM], and culling (until 60 DIM) data. G...Continue Reading

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Citations

Jul 16, 2019·Journal of Dairy Science·A ValldecabresN Silva-Del-Río
Aug 28, 2020·Animal Science Journal = Nihon Chikusan Gakkaihō·Sho IshikawaShiro Kushibiki
Jan 29, 2021·Animals : an Open Access Journal From MDPI·Carlos Eduardo Cardoso ConsentiniRoberto Sartori
Dec 29, 2020·Journal of Dairy Science·S GeigerJ R Aschenbach
Apr 10, 2021·Physiological Reports·Meghan K ConnellyLaura Hernandez
Jul 3, 2021·Animals : an Open Access Journal From MDPI·Pengtao LiClive J C Phillips

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