Abstract
Two experiments were conducted to determine energy and nutrient digestibility in four sources of distillers dried grains with solubles (DDGS) produced from corn and fed to growing pigs. The objective was to test the hypothesis that energy and nutrient digestibility in DDGS does not vary if samples are procured from ethanol plants that use similar production technologies and use corn that is grown within a narrow geographical area. The four sources of DDGS that were used were procured from ethanol plants that were less than 10 yr old and located within 250 km of each other. In Exp. 1, five growing barrows (initial BW = 71.4 kg) that were fitted with a T-canula in the distal ileum were allotted to a 5x5 Latin square design and used to measure apparent (AID) and standardized (SID) ileal digestibility of AA in the four sources of DDGS. Results of this experiment showed that the SID of CP and all AA except Cys and Pro were greater (p<0.05) in two of the DDGS sources than in the other two sources. Exp. 2 was conducted to measure the concentration of DE and ME and the apparent total tract digestibility (ATTD) of energy, N, P, ether extract, NDF, and ADF in corn and in the same four sources of DDGS as used in Exp. 1. Five pigs (initial BW = 29.7 kg) that were placed in metabolism cages and allotted to a 5x5 Latin square design were used. Results of Exp. 2 showed that the average DE and ME in DDGS were 4,072 and 3,750 kcal/kg DM, respectively, which was less (p<0.01) than the DE and ME in corn (4,181 and 4,103 kcal/kg DM, respectively). The average ATTD for P in DDGS was 56.1%, which was greater (p<0.01) than the ATTD for P in corn (31.9%). The ATTD for ADF in DDGS was also greater (p<0.05) than in corn, but the ATTD for ether extract and NDF were greater (p<0.05) in corn than in DDGS. It is concluded that energy and nutrient digestibility vary among sources of DDGS even when the DDGS is procured from ethanol plants that use corn grown within a narrow geographical region. Thus, factors other than corn growing region are responsible for the variability of energy and nutrient digestibility in DDGS.
Highlights
The apparent (AID) and standardized (SID) ileal digestibility of amino acids (AA) in distillers dried grains with solubles (DDGS) produced from corn vary among sources (Cromwell et al, 1993; Fastinger and Mahan, 2006; Stein et al, 2006)
It was suggested that the digestibility of AA in DDGS is plant specific and that some of the older plants producing DDGS are more likely to produce products with a low digestibility than newer plants
The objective of this research to test the hypothesis that the digestibility of energy, AA, P, N, ADF, and NDF in DDGS
Summary
The apparent (AID) and standardized (SID) ileal digestibility of amino acids (AA) in distillers dried grains with solubles (DDGS) produced from corn vary among sources (Cromwell et al, 1993; Fastinger and Mahan, 2006; Stein et al, 2006). One of the reasons that have been suggested for this variation is that different corn hybrids with different climatic requirements are grown in different regions of the United States and that this may influence the composition of DDGS (Belyea et al, 2004) If this is correct, the variability among sources of DDGS is expected to be less if the DDGS is sourced from ethanol plants located within a narrow geographical area than across different regions, because it is assumed that the corn grown within such a. This is an important question because most producers and feed mills source their DDGS within relatively small geographical areas It was, the objective of this research to test the hypothesis that the digestibility of energy, AA, P, N, ADF, and NDF in DDGS is constant if the DDGS is procured from ethanol plants that are located within a narrow geographical area
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
