Figure 1.
Figure 1.

Dry matter intake responses to prepartum acidified coproducts. (A) Prepartum DMI for cows that consumed the control (CON), Bio-Chlor (BC; Church and Dwight Co. Inc., Princeton, NJ), or SoyChlor (SC; West Central Cooperative, Ralston, IA) diets beginning 21 d before expected calving differed by day (P < 0.01) and tended to differ among treatments (P = 0.07) but did not differ by parity (P = 0.71). Treatment × day interaction: P = 0.27; treatment × parity × day interaction: P = 0.30; pooled SEM = 0.66. (B) Postpartum DMI was affected by day (P < 0.01) but not by parity (P = 0.20) or prepartum treatment (P = 0.61). Treatment × day interaction: P = 0.51; treatment × parity × day interaction: P = 0.16; pooled SEM = 1.17.

 


Figure 2.
Figure 2.

Peripartum BCS and BW response to prepartum acidified coproducts. Body condition score and BW data were collected on d -21, –7, 1, 10, and 21 relative to calving. (A) Peripartum BCS did not differ between control (CON), Bio-Chlor (BC; Church and Dwight Co. Inc., Princeton, NJ), or SoyChlor (SC) diets prepartum (P = 0.68). However, BCS was affected by parity (P = 0.04) and day (P < 0.01). Treatment × day interaction: P = 0.84; treatment × parity × day interaction: P = 0.07. (B) Peripartum BW tended to be affected by prepartum treatment (P = 0.09) and was significantly affected by both parity (P < 0.01) and day (P < 0.01). Treatment × day interaction: P = 0.99; treatment × parity × day interaction: P = 0.92.

 


Figure 3.
Figure 3.

Postpartum plasma glucose and β-hydroxybutyrate (BHBA) concentrations in primiparous and multiparous cows fed different prepartum diets. (A) Plasma glucose concentrations were greater for primiparous cows that consumed SoyChlor (SC; West Central Cooperative, Ralston, IA) prepartum on d 10 postpartum than for cows that consumed Bio-Chlor (BC) and the control diet (CON) prepartum (P < 0.05) but were greater for cows that consumed BC prepartum on d 21 than for cows that consumed SC and CON prepartum (P < 0.05). Postpartum plasma glucose in multiparous cows was not affected by treatment on any day. Treatment: P = 0.06; treatment × parity × day interaction: P < 0.01. (B) Postpartum plasma BHBA concentrations differed by day (P < 0.01) but not by parity (P = 0.27) or treatment (P = 0.91). Treatment × day interaction: P = 0.58; treatment × parity × day interaction: P = 0.36.

 


Figure 4.
Figure 4.

Peripartum total serum Ca concentrations of cows fed different prepartum diets. Serum Ca concentration was measured beginning 7 d before parturition through 5 d postpartum. Serum Ca concentrations tended to decrease postpartum (P = 0.07). Pooled SEM = 0.09; BC = Bio-Chlor (Church and Dwight Co. Inc., Princeton, NJ); SC = SoyChlor ; CON = control.