Table 3.
Effects of late gestational nutritional plane of primiparous beef females on single-quarter colostrum yield and composition
| Nutritional plane1 | ||||
|---|---|---|---|---|
| Item | Control | Nutrient Restricted | SEM2 | P-value |
| Colostrum weight, g | 510 | 304 | 68 | 0.04 |
| Colostrum volume, mL | 471 | 282 | 63 | 0.04 |
| Composition | ||||
| Protein, g/dL | 15.4 | 21.0 | 1.5 | 0.01 |
| Triglycerides, g/dL | 5.83 | 7.58 | 1.02 | 0.22 |
| Lactose, g/dL | 2.80 | 2.56 | 0.14 | 0.21 |
| Free glucose, mg/dL | 37.1 | 27.3 | 3.0 | 0.03 |
| Urea N, mg/dL | 4.18 | 3.17 | 0.33 | 0.03 |
| Immunoglobulin G, mg/mL | 172 | 271 | 33 | 0.04 |
| Immunoglobulin A, mg/mL | 8.9 | 15.3 | 1.6 | 0.006 |
| Total components3 | ||||
| Protein, g | 62.1 | 57.1 | 8.5 | 0.67 |
| Triglycerides, g | 22.7 | 20.7 | 4.1 | 0.73 |
| Lactose, g | 14.1 | 7.4 | 2.0 | 0.02 |
| Free glucose, mg | 188 | 77 | 35 | 0.03 |
| Urea N, mg | 21.6 | 8.6 | 3.4 | 0.01 |
| Immunoglobulin G, g | 63.2 | 72.1 | 10.8 | 0.55 |
| Immunoglobulin A, g | 4.54 | 3.94 | 1.22 | 0.72 |
1Primiparous dams were individually-fed either 100% (Control) or 70% (Nutrient Restricted) of metabolizable energy and metabolizable protein requirements for maintenance, pregnancy, and growth from day 160 of gestation to parturition.
2Standard error of the mean for Control (n = 11) and Nutrient Restricted (n = 13).
3Total components of colostrum were calculated as concentration multiplied by single-quarter colostrum volume.