JDS26031-Beiranvand et al.
Description
Supplementary file of the paper in JDS: A randomized controlled trial evaluating postpartum delayed milking strategy and oral Ca bolus administration on production and blood metabolites of Holstein cows. Implications: Subclinical calcium (Ca) deficiency is often considered a gateway to other calving-related 5 diseases that impose substantial economic losses on the dairy business. In this study, dairy cows supplemented or not with 2 oral Ca boluses after calving were either milked 3x per day or assigned to delayed milking for 24 and 48 h after colostrum harvest. Ca bolus administration had no effect on production performance and blood metabolites. Overall, milking withdrawal decreased daily 9 milk production during the 3 to 12 days in milk, but it did not affect the 3 monthly test day records. In addition, multiparous cows in the M48 treatment had increased blood concentrations of Ca, P and glucose and decreased those of β-hydroxybutyrate, highlighting delayed milking as a promising strategy to attenuate subclinical hypocalcemia. in the files submitted to this repository, Table 1 shows the ingredient and composition of the diets used pre-and postpartum, and a diagram is depicted to indicate the factorial design of the experiment (Fig 1). The effects of treatments on cumulative milk production through 3 to 12 days in milk, milk composition, and milk yield on 3 consecutive monthly records of the experimental cows are shown in Fig. 2, 3, and 4, respectively.
Files
Steps to reproduce
1. 669 Holstein dairy cows were stratified by parity and randomly assigned to treatments. 2. The cows were subjected to different recordings, including milk yield, composition, and blood analysis. 3. Data was analyzed using appropriate statistical methods in SAS.
Institutions
- University of Tehran