Figure 1.
Figure 1.

Serum insulin concentrations of nonlactating dairy cows receiving diet (d 0 to 88) to meet their ME requirements without Cr supplementation (MAN; n = 4), diet to exceed their ME requirements without Cr supplementation (HIGH; n = 4), or HIGH with 2.5 g/d of chromium propionate (HIGHCR; n = 5, with 10 mg of Cr/cow daily). A treatment × day interaction was detected (P < 0.01). Within days, letters indicate the following treatment differences (P < 0.05); a = HIGH vs. MAN, b = HIGH vs. HIGHCR, and c = HIGHCR vs. MAN.

 


Figure 2.
Figure 2.

Serum insulin concentrations following a glucose tolerance test (intravenous infusion of 0.5 g of glucose/kg of BW at 0 min) of nonlactating dairy cows receiving diet to meet their ME requirements without Cr supplementation (MAN; n = 4), diet to exceed their ME requirements without Cr supplementation (HIGH; n = 4), or HIGH with 2.5 g/d of chromium propionate (HIGHCR; n = 5, with 10 mg of Cr/cow daily). A treatment × day interaction was detected (P = 0.05). Within days, letters indicate the following treatment differences (P < 0.05); a = HIGH vs. MAN, b = HIGH vs. HIGHCR, and c = HIGHCR vs. MAN.

 


Figure 3.
Figure 3.

Serum glucose concentrations following a glucose tolerance test (intravenous infusion of 0.5 g of glucose/kg of BW at 0 min) of nonlactating dairy cows receiving diet to meet their ME requirements without Cr supplementation (MAN; n = 4), diet to exceed their ME requirements without Cr supplementation (HIGH; n = 4), or HIGH with 2.5 g/d of chromium propionate (HIGHCR; n = 5, with 10 mg of Cr/cow daily). A tendency for treatment × day interaction was detected (P = 0.10). Within days, letters indicate the following treatment differences (P < 0.01); a = HIGH vs. MAN and b = HIGH vs. HIGHCR.

 


Figure 4.
Figure 4.

Serum insulin:glucose ratio following a glucose tolerance test (intravenous infusion of 0.5 g of glucose/kg of BW at 0 min) of nonlactating dairy cows receiving diet to meet their ME requirements without Cr supplementation (MAN; n = 4), diet to exceed their ME requirements without Cr supplementation (HIGH; n = 4), or HIGH with 2.5 g/d of chromium propionate (HIGHCR; n = 5, with 10 mg of Cr/cow daily). A treatment × day interaction was detected (P = 0.02). Within days, letters indicate the following treatment differences (P ≤ 0.05); a = HIGH vs. MAN; b = HIGH vs. HIGHCR, and c = HIGHCR vs. MAN.