Table 5.
Standardized ileal digestibility of crude protein (CP) and AA in distillers dried grains with solubles subjected to increasing levels of heat treatment by weanling pigs 1
| |
Distillers dried grains with solubles |
|
|
|
|||
|---|---|---|---|---|---|---|---|
| |
|
Autoclaved at 130°C |
SEM |
P
-value
2
|
|||
| Item | Non-autoclaved | 10 min | 20 min | 30 min | Linear | Quadratic | |
| CP, % |
77.9 |
72.1 |
66.1 |
68.5 |
2.0 |
< 0.01 |
0.25 |
| Indispensable AA, % |
|
|
|
|
|
|
|
| Arginine |
87.9 |
81.3 |
81.0 |
78.5 |
1.7 |
< 0.01 |
0.11 |
| Histidine |
78.1 |
71.2 |
70.1 |
70.3 |
1.3 |
< 0.01 |
0.27 |
| Isoleucine |
77.3 |
71.1 |
71.4 |
68.2 |
1.4 |
< 0.01 |
0.03 |
| Leucine |
86.7 |
83.3 |
83.1 |
81.8 |
0.8 |
< 0.01 |
0.12 |
| Lysine |
66.8 |
54.9 |
55.3 |
51.9 |
1.9 |
< 0.01 |
0.04 |
| Methionine |
86.1 |
80.4 |
80.5 |
78.5 |
0.9 |
< 0.01 |
< 0.01 |
| Phenylalanine |
83.7 |
79.0 |
79.2 |
77.5 |
1.0 |
< 0.01 |
0.05 |
| Threonine |
70.2 |
64.0 |
63.1 |
61.3 |
1.6 |
< 0.01 |
0.33 |
| Tryptophan |
65.9 |
55.5 |
54.5 |
53.2 |
2.0 |
< 0.01 |
0.20 |
| Valine |
77.2 |
71.0 |
70.7 |
67.9 |
1.4 |
< 0.01 |
0.09 |
| Mean |
80.7 |
75.2 |
74.9 |
73.1 |
1.1 |
< 0.01 |
0.09 |
| Dispensable AA, % |
|
|
|
|
|
|
|
| Alanine |
83.3 |
79.1 |
77.1 |
76.8 |
1.3 |
< 0.01 |
0.89 |
| Aspartic acid |
72.3 |
62.1 |
62.1 |
60.2 |
1.5 |
< 0.01 |
0.03 |
| Cysteine |
77.7 |
70.8 |
66.8 |
68.9 |
1.5 |
< 0.01 |
0.55 |
| Glutamic acid |
85.2 |
80.1 |
79.0 |
78.7 |
0.9 |
< 0.01 |
0.33 |
| Glycine |
73.4 |
66.0 |
58.1 |
61.7 |
4.6 |
< 0.01 |
0.39 |
| Proline |
76.9 |
72.4 |
71.3 |
70.5 |
1.3 |
< 0.01 |
0.48 |
| Mean | 78.1 | 71.7 | 69.0 | 69.4 | 1.5 | < 0.01 | 0.91 |
1Data are means of 8 observations, except for the distillers dried grains with solubles diet that was autoclaved for 10 min (n = 7); Values for standardized ileal digestibility were calculated by correcting apparent ileal digestibility values for basal endogenous losses (g/kg of DMI), which were determined by feeding pigs a N-free diet: CP, 21.93; Arginine, 0.68; Histidine, 0.19; Isoleucine, 0.30; Leucine, 0.50; Lysine, 0.31; Methionine, 0.08; Phenylalanine, 0.30; Threonine, 0.66; Tryptophan, 0.15; Valine, 0.43; Alanine, 0.71; Aspartic acid, 0.77; Cysteine, 0.21; Glutamic acid, 0.98; Glycine, 2.08; and Serine, 0.62.
2Linear and quadratic effects of time of autoclaving.