Table 9.
Effects of fat source and dietary FFA content on the relative weight of the gastrointestinal tract at 33 weeks of age.
| Item | BW1, g | Relative weight, g/kg BW |
||||||
|---|---|---|---|---|---|---|---|---|
| Proventriculus + Gizzard | Duodenum | Jejunum | Ileum | Small Intestine | Cecum | Liver | ||
| Experimental diet | ||||||||
| S10 | 1,840 | 17.1 | 8.4 | 12.0 | 14.4a | 34.7 | 7.1 | 21.5 |
| S20 | 1,953 | 15.5 | 8.2 | 13.0 | 13.7ab | 34.8 | 4.9 | 21.8 |
| S30 | 1,880 | 16.8 | 8.3 | 11.7 | 12.4ab | 32.3 | 6.8 | 22.8 |
| S45 | 1,916 | 17.3 | 8.8 | 11.6 | 11.4b | 31.9 | 7.3 | 24.7 |
| P10 | 1,943 | 16.8 | 8.3 | 12.3 | 13.4ab | 34.0 | 7.0 | 22.8 |
| P20 | 1,920 | 16.4 | 7.9 | 10.7 | 12.8ab | 31.4 | 6.6 | 19.3 |
| P30 | 1,943 | 17.6 | 8.3 | 12.0 | 12.6ab | 32.8 | 7.8 | 21.3 |
| P45 | 1,928 | 15.4 | 7.9 | 11.8 | 14.0ab | 33.7 | 7.0 | 21.2 |
| Fat source | ||||||||
| Soybean | 1,911 | 16.7 | 8.4 | 12.1 | 13.0 | 33.4 | 6.5 | 22.7a |
| Palm | 1,933 | 16.6 | 8.1 | 11.7 | 13.2 | 33.0 | 7.1 | 21.2b |
| FFA content | ||||||||
| 10% | 1,918 | 16.9 | 8.4 | 12.1 | 13.9 | 34.4 | 7.1 | 22.2 |
| 20% | 1,936 | 16.0 | 8.1 | 11.8 | 13.2 | 33.1 | 5.8 | 20.5 |
| 30% | 1,912 | 17.2 | 8.3 | 11.8 | 12.5 | 32.6 | 7.2 | 22.0 |
| 45% | 1,922 | 16.4 | 8.3 | 11.7 | 12.7 | 32.8 | 7.1 | 23.0 |
| SEM2 | 20.79 | 0.53 | 0.22 | 0.47 | 0.52 | 1.03 | 0.82 | 0.77 |
| Effects, P-values | ||||||||
| Fat source | 0.192 | 0.799 | 0.096 | 0.345 | 0.558 | 0.615 | 0.403 | 0.020 |
| FFA content | 0.773 | 0.178 | 0.685 | 0.883 | 0.119 | 0.465 | 0.359 | 0.067 |
| Fat source × FFA | 0.213 | 0.100 | 0.300 | 0.057 | 0.020 | 0.184 | 0.511 | 0.059 |
S = soybean; P = palm; BW = body weight; FFA = free fatty acids.
a,b Means within each variable with more than 2 levels (experimental diet or FFA content) not sharing a common superscript differ according to Tukey's test (P < 0.05).
1
Average BW of the hens euthanized and used in sampling for relative organ weight calculations.
2
Pooled standard error of the means.