Journal article
Authors list: Venjakob, P. L.; Heuwieser, W.; Borchardt, S.
Publication year: 2023
Pages: 7056-7075
Journal: Journal of Dairy Science
Volume number: 106
Issue number: 10
ISSN: 0022-0302
eISSN: 1525-3198
Open access status: Gold
DOI Link: https://doi.org/10.3168/jds.2022-22642
Publisher: Elsevier
Abstract:
The objective of experiment I was to evaluate the as-sociation between days in the close-up group (DINCU) and milk production, early lactation diseases, reproduc-tive performance, and culling. In experiment II behav-ioral changes associated with DINCU were evaluated using a neck-mounted sensor (Smarttag neck, Nedap Livestock Management, Groenlo, the Netherlands). Cow-lactations of 28,813 animals from 14,155 individ-ual cows of 2 farms in northern Germany and western Slovakia, calving between January 2015 and December 2020, were included in the study. After exclusion of cows with a gestation length <262 and >292 d and cows with >42 DINCU data from 8,794 and 19,598 nulliparous and parous cows, respectively, were available for final statistical analyses. To analyze the association between DINCU and second test-d 305-d mature-equivalent milk projection, linear mixed models were calculated. Binary data (i.e., clinical hypocalcemia, hyperketone-mia, retained placenta [RP], acute puerperal metritis [APM], mastitis, left displaced abomasum [LDA], first service pregnancy risk) were analyzed using logistic regression models. To analyze the association between DINCU and culling or death during the first 300 DIM Cox proportional hazards were used. To analyze the association between DINCU and behavior 7 d before to 7 d after calving (i.e., activity, inactivity, eating, ruminating time), linear mixed models were calculated. Nulliparous cows with a short (<10 DINCU) and a long stay (>30 DINCU) in the close-up group had a lower milk production an increased risk for hyperketo-nemia, RP, and APM compared with nulliparous cows with DINCU between 21 to 28 d. Parous cows with a short (<10 DINCU) and a long stay (>30 DINCU) in the close-up group had a lower milk production, an in-creased risk for RP and mastitis, a reduced first service pregnancy risk, and an increased culling risk, compared with parous cows with DINCU between 21 to 28 d. Furthermore, the risk for clinical hypocalcemia and LDA was increased in parous cows with >30 DINCU compared with parous cows with <30 DINCU. The risk for APM was increased in parous cows with <10 DINCU compared with parous cows with >10 DINCU. In nulliparous cows no association was found between DINCU and the risk for left displaced abomasum and mastitis. In experiment II, cows with 7 and 35 DINCU had an impaired behavior around calving compared with cows with 14, 21, and 28 DINCU. During the last 7 d before parturition, these cows were more inactive and had a reduced eating and ruminating time. After calving, cows with 7 DINCU spent less time eating. In conclusion, cows with <10 DINCU and cows with >30 DINCU had a lower milk production, a higher risk to incur diseases and an impaired behavior, especially before calving.
Citation Styles
Harvard Citation style: Venjakob, P., Heuwieser, W. and Borchardt, S. (2023) Associations between days in the close-up group and milk production, transition cow diseases, reproductive performance, culling, and behavior around calving of Holstein dairy cows, Journal of Dairy Science, 106(10), pp. 7056-7075. https://doi.org/10.3168/jds.2022-22642
APA Citation style: Venjakob, P., Heuwieser, W., & Borchardt, S. (2023). Associations between days in the close-up group and milk production, transition cow diseases, reproductive performance, culling, and behavior around calving of Holstein dairy cows. Journal of Dairy Science. 106(10), 7056-7075. https://doi.org/10.3168/jds.2022-22642
Keywords
305-d mature-equivalent milk projection; days in close-up group; early lactation diseases; INCREASING DAYS; POSTPARTUM DISEASES; PREPARTUM; PRESYNCHRONIZATION; Rumination; UTERINE DISEASE
