Table 2.
Chemical composition and digestibility (% DM basis) of cottonseed hulls, sorghum grain, and dried distillers grains with solubles (DDGS), and ground Juniperus spp. and Prosopis glandulosa used in the treatment diets
| Item1 | Ingredient2 | |||||||
|---|---|---|---|---|---|---|---|---|
| Cottonseed hulls | Sorghum grain | Corn DDGS | J.pin | J.ash | J.mon | J.vir | P.glan | |
| Nutrient composition | ||||||||
| DM, % | 92.3 | 92.6 | 91.8 | 93.9 | 93.8 | 95.4 | 93.8 | 91.9 |
| CP, % | 3.5 | 11.9 | 30.4 | 2.9 | 2.8 | 2.5 | 3.8 | 5.7 |
| ADICP, % | 3.2 | 1.5 | 1.3 | 1.5 | 1.6 | 1.4 | 1.8 | 2.5 |
| aNDF, % | 85.2 | 7.0 | 30.4 | 62.1 | 65.0 | 71.0 | 68.0 | 74.7 |
| ADF, % | 62.1 | 5.3 | 12.9 | 49.4 | 52.1 | 57.9 | 55.8 | 57.8 |
| Lignin, % | 16.4 | 0.9 | 2.9 | 19.4 | 21.2 | 23.2 | 21.7 | 17.9 |
| Crude fat, % | 0.6 | 3.1 | 8.7 | 3.2 | 3.2 | 4.5 | 4.1 | 6.2 |
| Ash, % | 3.6 | 3.6 | 4.7 | 4.9 | 4.8 | 3.4 | 4.4 | 4.3 |
| Ca, % | 0.12 | 0.04 | 0.07 | 1.31 | 1.53 | 1.27 | 1.37 | 1.42 |
| P, % | 0.04 | 0.21 | 0.88 | 0.04 | 0.04 | 0.03 | 0.06 | 0.03 |
| S, % | 0.06 | 0.14 | .93 | 0.07 | 0.04 | 0.04 | 0.05 | 0.06 |
| K, % | 0.99 | 0.34 | 1.33 | 0.33 | 0.16 | 0.11 | 0.24 | 0.35 |
| Mg, % | 0.14 | 0.12 | 0.38 | 0.06 | 0.04 | 0.03 | 0.1 | 0.02 |
| Na, % | 0.01 | 0.01 | 0.31 | 1.25 | 0.01 | 0.01 | 0.01 | 0.01 |
| Fe, mg/kg | 33 | 48 | 85 | 168 | 98 | 113 | 140 | 112 |
| Zn, mg/kg | 5 | 20 | 64 | 104 | 9 | 6 | 11 | 4 |
| Cu, mg/kg | 3 | 3 | 8 | 3 | 2 | 2 | 2 | 2 |
| Particle distribution, % | ||||||||
| 19 to 8 mm | 68.9 | – | 0.20 | 3.9 | 3.7 | 5.2 | 0.3 | |
| 8 to 1.18 mm | 27.6 | – | – | 69.3 | 68.1 | 68.2 | 63.7 | 70.3 |
| < 1.18 mm | 3.5 | – | – | 30.5 | 28.0 | 28.2 | 31.1 | 29.4 |
| < 8 mm | 31.1 | – | – | 99.8 | 96.2 | 96.3 | 94.8 | 99.7 |
| CT, % | ||||||||
| Extractable | 1.4 | 0 | – | 2.8 | 3.2 | 1.8 | 2.4 | 0.9 |
| Protein-bound | 1.8 | 0 | – | 2.1 | 2.3 | 1.9 | 2.3 | 3.8 |
| Fiber-bound | 0.2 | 0 | – | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 |
| Total | 3.2 | 0 | – | 4.9 | 5.5 | 3.7 | 4.7 | 4.7 |
| True IVDMD | 18.9 | 94.3 | 75.6 | 31.3 | 29.0 | 24.6 | 26.9 | 20.9 |
1ADICP = acid detergent insoluble CP; aNDF = neutral detergent fiber, using α-amylase and sodium sulfite; CT = condensed tannins; True IVDMD = true 48-h IVDMD. Particle distribution = ingredient sieved using the manually operated Penn State Particle Separator (Lammers et al., 1996 according to modified procedures of Kononoff et al. (2003).
2J.pin = Juniperus pinchotii; J.ash = Juniperus ashei; J.mon = Juniperus monosperma; and J.vir = Juniperus virginiana (entire above-ground biomass); P.glan = Prosopis glandulosa (entire above-ground biomass excluding leaves); DDGS = corn dried distillers grains with solubles produced from corn ethanol production (POET, Sioux Falls, SD).