Table 3.
Effect of duodenal infusion of casein or glutamic acid on ileal and fecal nutrient flow and small and large intestinal starch digestion in steers receiving 1.5 kg of duodenally infused raw cornstarch
| Item, g dry matter/d | Treatment | SEM | P-value | ||
|---|---|---|---|---|---|
| Control | Casein | Glutamic | |||
| Duodenal starch infused | 1,462 | 1,433 | 1,459 | 18.60 | 0.21 |
| Nutrient flow from the ileum | |||||
| Dry matter | 2,999ab | 2,601a | 3,044b | 175.8 | 0.09 |
| Organic matter | 2,588 | 2,262 | 2,630 | 150.5 | 0.11 |
| Starch | 1,070A | 933B | 1,098A | 61.17 | 0.04 |
| Ethanol soluble oligosaccharides | 88.7A | 178.0B | 60.7A | 21.58 | <0.01 |
| Small intestinal starch digestion, % | 27.1ab | 34.3a | 24.9b | 3.59 | 0.09 |
| Starch removed at ileum | 7.7 | 8.5 | 8.3 | 0.63 | 0.60 |
| Nutrient flow to feces | |||||
| Starch | 533.2 | 443.2 | 483.1 | 40.0 | 0.18 |
| Ethanol soluble oligosaccharides | 29.8 | 30.2 | 31.4 | 4.78 | 0.96 |
| Large intestinal starch digestion, % | 49.2 | 52.2 | 55.2 | 3.3 | 0.28 |
| Large intestinal dry matter digestion, % | 40.4 | 40.6 | 44.4 | 1.74 | 0.14 |
| Large intestinal organic matter digestion, % | 37.1 | 38.3 | 41.8 | 1.84 | 0.12 |
| Postruminal starch digestion, % | 63.4 | 69.1 | 66.7 | 2.54 | 0.18 |
A,BMeans in rows with different superscripts differ (P ≤ 0.05)
a,bMeans in rows with different superscripts differ (P ≤ 0.10)