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Effect of body condition score loss during the transition period on metabolism, milk yield and health in Holstein cows

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25 févr. 2025
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Fig. 1.

The change trend of body condition score (BCS) in the high-BCS-loss (H) group (n = 64), lost-BCS (L) group (n = 52) and maintained-BCS (M) group (n = 40) of experimental cows assessed for body condition score (BCS) a, b, c – different letters at the same time point indicate significant differences between groups (P-value < 0.05); T – time effect; G – between-group effect; G × T – inter-group interaction with time; error bars – standard error
The change trend of body condition score (BCS) in the high-BCS-loss (H) group (n = 64), lost-BCS (L) group (n = 52) and maintained-BCS (M) group (n = 40) of experimental cows assessed for body condition score (BCS) a, b, c – different letters at the same time point indicate significant differences between groups (P-value < 0.05); T – time effect; G – between-group effect; G × T – inter-group interaction with time; error bars – standard error

Fig. 2.

Levels of plasma β-hydroxybutyrate (BHB, A), non-esterified fatty acids (NEFA, B), glucose (C) and total cholesterol (TC, D) in the high-BCS-loss (H) group (n = 64), lost-BCS (L) group (n = 52) and maintained-BCS (M) group (n = 40) of experimental cows assessed for body condition score (BCS)
a, b, c – different letters at the same time point indicate significant differences between groups (P-value < 0.05); T – time effect; G – between-group effect; G × T – inter-group interaction with time; error bars – standard error
Levels of plasma β-hydroxybutyrate (BHB, A), non-esterified fatty acids (NEFA, B), glucose (C) and total cholesterol (TC, D) in the high-BCS-loss (H) group (n = 64), lost-BCS (L) group (n = 52) and maintained-BCS (M) group (n = 40) of experimental cows assessed for body condition score (BCS) a, b, c – different letters at the same time point indicate significant differences between groups (P-value < 0.05); T – time effect; G – between-group effect; G × T – inter-group interaction with time; error bars – standard error

Fig. 3.

Levels of plasma aspartate aminotransferase (AST, A), total bilirubin (TBIL, B), albumin (C) and urea nitrogen (UN, D) in the high-BCS-loss (H) group (n = 64), lost-BCS (L) group (n = 52), and maintained-BCS (M) group (n = 40) of experimental cows assessed for body condition score (BCS)
a, b – different letters at the same time point indicate significant differences between groups (P-value < 0.05); T – time effect; G – between-group effect; G × T – inter-group interaction with time; error bars – standard error
Levels of plasma aspartate aminotransferase (AST, A), total bilirubin (TBIL, B), albumin (C) and urea nitrogen (UN, D) in the high-BCS-loss (H) group (n = 64), lost-BCS (L) group (n = 52), and maintained-BCS (M) group (n = 40) of experimental cows assessed for body condition score (BCS) a, b – different letters at the same time point indicate significant differences between groups (P-value < 0.05); T – time effect; G – between-group effect; G × T – inter-group interaction with time; error bars – standard error

Fig. 4.

Levels of plasma total antioxidant capacity (T-AOC, A) and malondialdehyde (MDA, B) in the high-BCS-loss (H) group (n = 64), lost-BCS (L) group (n = 52), and maintained-BCS (M) group (n = 40) of experimental cows assessed for body condition score (BCS)
a, b – different letters at the same time point indicate significant differences between groups (P < 0.05); T – time effect; G – between-group effect; G × T – inter-group interaction with time; error bars – standard error
Levels of plasma total antioxidant capacity (T-AOC, A) and malondialdehyde (MDA, B) in the high-BCS-loss (H) group (n = 64), lost-BCS (L) group (n = 52), and maintained-BCS (M) group (n = 40) of experimental cows assessed for body condition score (BCS) a, b – different letters at the same time point indicate significant differences between groups (P < 0.05); T – time effect; G – between-group effect; G × T – inter-group interaction with time; error bars – standard error

Fig. 5.

Levels of plasma insulin (A) and leptin (B) in the high-BCS-loss (H) group (n = 64), lost-BCS (L) group (n = 52), and maintained-BCS (M) group (n = 40) of experimental cows assessed for body condition score (BCS)
a, b – different letters at the same time point indicate significant differences between groups (P-value < 0.05); T – time effect; G – between-group effect; G × T – inter-group interaction with time; error bars – standard error
Levels of plasma insulin (A) and leptin (B) in the high-BCS-loss (H) group (n = 64), lost-BCS (L) group (n = 52), and maintained-BCS (M) group (n = 40) of experimental cows assessed for body condition score (BCS) a, b – different letters at the same time point indicate significant differences between groups (P-value < 0.05); T – time effect; G – between-group effect; G × T – inter-group interaction with time; error bars – standard error

Fig. 6.

Levels of plasma calcium (A), phosphorus (B), magnesium (C), and potassium (D) in the high-BCS-loss (H) group (n = 64), lost-BCS (L) group (n = 52), and maintained-BCS (M) group (n = 40) of experimental cows assessed for body condition score (BCS) T – time effect; G – between-group effect; G × T – inter-group interaction with time; error bars – standard error
Levels of plasma calcium (A), phosphorus (B), magnesium (C), and potassium (D) in the high-BCS-loss (H) group (n = 64), lost-BCS (L) group (n = 52), and maintained-BCS (M) group (n = 40) of experimental cows assessed for body condition score (BCS) T – time effect; G – between-group effect; G × T – inter-group interaction with time; error bars – standard error

Fig. 7.

Trend of daily milk yield in the high-BCS-loss (H) group (n = 64), lost-BCS (L) group (n = 52), and maintained-BCS (M) group (n = 40) of experimental cows assessed for body condition score (BCS)
a, b – different letters at the same time point indicate significant differences between groups (P-value < 0.05); T – time effect; G – between-group effect; G × T – inter-group interaction with time; error bars – standard error
Trend of daily milk yield in the high-BCS-loss (H) group (n = 64), lost-BCS (L) group (n = 52), and maintained-BCS (M) group (n = 40) of experimental cows assessed for body condition score (BCS) a, b – different letters at the same time point indicate significant differences between groups (P-value < 0.05); T – time effect; G – between-group effect; G × T – inter-group interaction with time; error bars – standard error

Prevalence of disease in three groups of dairy cows

Condition Percentage affected per group
M (n = 40) L (n = 52) H (n = 64)
Ketosis 12.5 (5/40)a 42.3 (22/52)b 60.93 (39/64)b
Mastitis 15 (6/40)a 17.3 (9/52)a 37.5 (24/64)b
Retained placenta 7.5 (3/40)a 9.62 (5/52)a 34.38 (22/64)b
Milk fever 2.5 (1/40) 3.84 (2/52) 6.25 (4/64)
Displaced abomasum 0a 1.92 (1/52) 14.06 (9/64)b
Metritis 5 (2/40)a 13.46 (7/52) 25 (16/64)b
Lameness 10 (4/40) 15.38 (8/52) 15.63 (10/64)