Table 1.
Ingredient and nutrient composition of diets
| Diet | |||
|---|---|---|---|
| Ingredient, % of DM | RCV1 | CON2 | CTN3 |
| Rolled corn | 12.7 | 67.25 | 72.25 |
| Prairie hay | 22.5 | 7.0 | — |
| Cotton gin trash | — | — | 7.0 |
| Whole cottonseed | — | — | 15.0 |
| Sweet Bran4 | 60.7 | 15.0 | — |
| Liquid supplement5 | — | 5.0 | — |
| Dry supplement6 | 4.1 | 5.0 | 5.0 |
| Urea | — | 0.75 | 0.75 |
| Nutrient composition, DM basis | |||
| DM, % | 70.10 | 80.70 | 84.34 |
| CP, % | 16.70 | 14.16 | 14.13 |
| NDF, % | — 7 | 25.15 | 27.33 |
| ADF, % | 23.90 | 8.59 | 15.28 |
| peNDF8, % | — | 8.80 | 9.82 |
| TDN, % | 68.90 | 79.309 | 78.209 |
| Fat, % | — | 3.25 | 5.82 |
| NEm, Mcal/kg | 1.00 | 1.7210 | 1.6910 |
| NEg, Mcal/kg | 0.69 | 1.1010 | 1.0710 |
| Ca11, % | 0.53 | 0.62 | 0.85 |
| P, % | 0.53 | 0.57 | 0.46 |
| K, % | 0.93 | 1.00 | 0.84 |
| S, % | — | 0.22 | 0.19 |
| Na, % | — | 0.11 | 0.05 |
| Mg, % | — | 0.29 | 0.28 |
| Cu, mg/L | — | 20.00 | 24.60 |
| Fe, mg/L | — | 144.57 | 165.93 |
| Zn, mg/L | — | 161.03 | 145.97 |
| Mn, mg/L | — | 58.32 | 57.86 |
1Common receiving diet for all cattle. Diet was analyzed by Servi-Tech Laboratories, Dodge City, KS.
2Control diet (CON); representative of a typical finishing diet.
3Cotton diet (CTN); cotton byproducts used as the primary protein, fat, and fiber source in the diet.
4Sweet Bran (Cargill Inc., Dalhart, TX).
5Liquid supplement was formulated to contain (% DM basis) 45.86% corn steep, 36.17% cane molasses, 6% hydrolyzed vegetable oil, 5.46% 80/20 vegetable oil blend, 5.2 % water, 1.23% urea (55% solution), and 0.10% xanthan gum.
6Dry supplement was formulated to contain (% DM basis) 40.0% ground corn, 29.6% limestone, 20.0% wheat middlings, 7.0% urea, 1.0 % salt, 0.53% magnesium oxide, 0.51% zinc sulfate, 0.17% manganese oxide, 0.13% copper sulfate, 0.08% selenium premix (0.6%), 0.0037% cobalt carbonate, 0.32% vitamin A (30,000 IU/g), 0.10% vitamin E (500 IU/g), 0.009% vitamin D (30,000 IU/g), 0.20% tylosin (Tylan-40, Elanco Animal Health, Greenfield, IN), and 0.33% monensin (Rumensin-90; Elanco Animal Health).
7A “–” symbol under nutrient composition indicates nutrient not analyzed in the receiving ration.
8Physically effective fiber provided by the roughage and byproducts in the diet.
9Calculated according to Weiss et al. (1992).
10Calculated according to NASEM (2016).
11Minerals analyzed by the Soil, Water and Forage Analytical Laboratory (Stillwater, OK).