Effect of lactation number on some biochemical parameters in postpartum dairy cows

Abstract

Aim: This study aimed to investigate the relationship between lactation number, milk yield, and some blood biochemical parameters in dairy cows. Materials and Methods: The material of the study consists of dairy cows (n=60), and three different groups were formed according to the lactation numbers of the cows. Non-lactating heifers were assigned to Group 1 (n=10), 1st and 2nd lactation cows were assigned to Group 2 (n=24), and 3rd and 4th lactation cows were assigned to Group 3 (n=26). The blood total protein, albumin, blood urea nitrogen (BUN) calcium, phosphorus, magnesium, glucose, cholesterol, aspartate transaminase (AST), and gamma-glutamyl transpeptidase (GGT) levels of the cows in the groups were measured. In addition, the milk yields of the groups were compared, and the relationship between these values and milk yield was investigated. Results: Total protein level was higher in the G3, G2 and G1 groups, respectively (p Conclusion: In conclusion, the number of lactations in dairy cows significantly affected the biochemical parameters within total protein, albumin, glucose, cholesterol, AST and GGT in dairy cows. These differences were found especially in Group 2 and Group 3, which included multiparous cows, compared to Group 1 (heifers).

Keywords

• biochemical parameters
• dairy cow
• lactation number
• milk yield