This is a draft schedule. Presentation dates, times and locations may be subject to change.
252
Apparent Ileal and Total Tract Digestibility of Corn DDGS Steeped without or with Fiber Degrading Enzymes and Fed to Growing Pigs
Apparent Ileal and Total Tract Digestibility of Corn DDGS Steeped without or with Fiber Degrading Enzymes and Fed to Growing Pigs
Sunday, July 9, 2017
Exhibit Hall (Baltimore Convention Center)
Corn dried distiller’s grains with solubles (DDGS) is a high in gross energy but its use in pig diets is limited due to high fiber concentration. Steeping fiber rich ingredients with fiber degrading enzymes (FDE) may improve their feeding value. We evaluated apparent ileal (AID) and total tract (ATTD) of CP, crude fat and fiber in DDGS steeped without or with 2 commercially available FDE (A and B). FDE-A supplied 5,500 U of xylanase and 1,050 U of β-glucanase per kg of feed and FDE-B supplied 1,200 U of xylanase, 150 U of β-glucanase, 500 U of cellulase and 5,000 U of protease per kg of feed. A mixture of 350 g of DDGS, additives (none for control) and 1.5 l of water was placed in sterile containers and incubated at 40°C with agitation every 40 min for 24 h. For feeding, respective DGGS was mixed with a base at a ratio of 65: 35 to provide 20% CP. The base contained corn starch, minerals, vitamins and 0.2% TiO2 as indigestible marker. Six ileal-cannulated pigs (20 kg BW) were fed the 3 diets in a replicated 3 x 3 Latin square design to give 6 replicates per diet. Pigs were fed at 2.8 x maintenance energy and had free access to water. In each period, pigs were adjusted to diets for 5 d followed by 2 d for grab fecal and 2 d, 8 h continuous collection of ileal digesta. Treatments had no effects (P > 0.05) on AID of CP, fiber and crude fat (Table 1). DDGS steeped with FDE-A had lower (P = 0.005) ATTD of NDF than control but higher (P= 0.001) ATTD of crude fat compared to the control or DDGS steeped with FDE-B. In conclusions, under conditions of the study, steeping DDGS with fiber degrading enzymes had no effects on fiber (NDF and ADF) digestibility in growing pigs.
Table 1. AID and ATTD(%) of components in corn DDGS steeped without or with FDE
|
DM |
CP |
NDF |
ADF |
Crude fat |
AID |
|
|
|
|
|
Control |
59.0 |
59.9 |
26.5 |
17.4 |
66.1 |
FDE-A |
58.9 |
59.4 |
24.7 |
19.2 |
66.2 |
FDE-B |
60.5 |
56.4 |
28.9 |
21.4 |
67.1 |
SEM |
2.22 |
2.69 |
5.85 |
6.69 |
2.47 |
p-value |
0.794 |
0.450 |
0.847 |
0.900 |
0.945 |
ATTD |
|
|
|
|
|
Control |
76.2 |
73.3 |
55.3a |
59.3 |
46.8b |
FDE-A |
74.8 |
71.8 |
46.7b |
54.5 |
56.4a |
FDE-B |
76.0 |
70.7 |
50.7ab |
58.6 |
46.4b |
SEM |
1.14 |
2.15 |
1.94 |
2.56 |
2.44 |
p-value |
0.109 |
0.109 |
0.005 |
0.065 |
0.001 |