Table 5.
Cow variables at the beginning of the experiment (day −11) and plasma fatty acid concentrations (µg/mL of plasma) in beef cows supplemented with Ca salts of soybean oil (CSSO; n = 9) or prilled saturated fat (CON; n = 9) in Exp. 21
| Item3 | CSSO | CON | SEM | P value |
|---|---|---|---|---|
| Cow variables | ||||
| Age, yr | 6.74 | 6.76 | 0.39 | 0.96 |
| Days postpartum, d | 64.9 | 61.9 | 2.4 | 0.25 |
| BW, kg | 582 | 577 | 9 | 0.71 |
| BCS2 | 5.12 | 5.13 | 0.08 | 0.91 |
| Plasma fatty acids3,4 | ||||
| Mystiric (14:0) | 3.17 | 3.50 | 0.12 | 0.09 |
| Myristoleic (14:1) | 4.36 | 3.87 | 0.65 | 0.61 |
| Palmitic (16:0) | 92.6 | 92.4 | 3.8 | 0.97 |
| Palmitoleic (16:1) | 5.60 | 6.62 | 0.22 | <0.01 |
| Stearic (18:0) | 141 | 146 | 6 | 0.52 |
| Oleic (18:1) | 55.3 | 63.3 | 2.3 | 0.02 |
| Linoleic (18:2, ω-6) | 223 | 149 | 4.7 | <0.01 |
| Linolenic (18:3, ω-3) | 94.5 | 114 | 3.3 | <0.01 |
| Dihomo-gamma-linolenic acid (20:3, ω-6) | 10.1 | 9.49 | 0.37 | 0.29 |
| Arachdonic (20:4, ω-6) | 13.8 | 14.1 | 0.4 | 0.59 |
| Docosadienoic (22:2, ω-6) | 14.5 | 17.1 | 0.7 | 0.03 |
| Docosapentaenoic (22:5, ω-3) | 9.50 | 9.73 | 0.50 | 0.75 |
| Total saturated fatty acids | 249 | 255 | 10 | 0.69 |
| Total monounsaturated fatty acids | 64.2 | 69.8 | 3.9 | 0.33 |
| Total polyunsaturated fatty acids | 371 | 311 | 11 | <0.01 |
| ω-3 | 105 | 123 | 3 | <0.01 |
| ω-6 | 263 | 192 | 8 | <0.01 |
| Ratio linoleic:linolenic acid | 2.53 | 1.56 | 0.03 | <0.01 |
| Total identified fatty acids | 679 | 642 | 21 | 0.24 |
1CSSO = daily supplementation (per cow) with 100 g of a soybean meal + 100 g of ground corn + 100 g of Ca salts of soybean oil (Essentiom, Church and Dwight Co., Inc., Princeton, NJ); CON = daily supplementation (per cow) with 100 g of a soybean meal + 100 g of ground corn + 87 g of prilled saturated fat (Energy Booster 100, Milk Specialties, Eden Prairie, MN) + 13 g of limestone. Treatments were offered from day 0 (timed AI) to 21 of the experiment.
2According to Wagner et al. (1988).
3Blood samples were collected from all cows (n = 90, being 45 per treatment) on days 0 (before the first treatment application), 7, and 15. Values obtained on day 0 served as covariate; therefore, values reported are covariately adjusted means from days 7 and 15.
4Saturated fatty acids = mystiric, palmitic, and stearic acids; monounsaturated fatty acids = myristoleic, palmitoleic, and oleic acids; polyunsaturated fatty acids = linoleic, linolenic, dihomo-gamma-linolenic, arachidonic, docosadienoic, and docosapentaenoic acids.