Location: Agroecosystems Management Research2013 Annual Report
1a. Objectives (from AD-416):
Determine digestible energy (DE) and metabolizable energy (ME) in three samples of oil extracted dried distillers grains with solubles (OE-DDGS), validate prediction equations previously determined for OE-DDGS fed to growing pigs, and determine net energy (NE) of these same OE-DDGS sources.
1b. Approach (from AD-416):
1. Obtain three samples of OE-DDGS and analyze for crude protein, ether extract, starch, fiber, ash, and minerals. 2. Conduct DE and ME digestibility study with pigs fed the three OE-DDGS sources and compare the determined DE and ME values to predicted values using a prediction equation generated from a previous experiment. 3. Feed the three samples of OE-DDGS to growing pigs for 28 days and determine NE of each OE-DDGS source utilizing the whole body composition technique.
3. Progress Report:
This research was designed to: 1) Refine digestible and metabolizable energy (DE and ME, respectively) values for dried distillers grains with solubles (DDGS) ranging in crude fat content from 5 to 14%; 2) Validate DE and ME prediction equations determined for DDGS of varying fat content that were determined in past research; 3) Determine the net energy (NE) content in these same DDGS sources; and 4) Validate net energy (NE) in a commercial setting. Objectives 1 and 2: DE and ME Refinement and Equation Validation. The animal and laboratory portion of this experiment has been completed with data analysis and summarization underway. In addition, feed from the field study (Objective 4) was obtained to determine DE obtained from pigs fed in metabolism crates to the DE estimates obtained from pigs fed in the field study. Objective 3: NE Determination and Equation Development. The animal and laboratory portion of this experiment has been completed with data analysis and summarization underway. Objective 4: NE Validation. The animal portion of this experiment was completed May 30, 2013, with laboratory analysis currently underway. Upon completion of the laboratory analysis, data will be analyzed and subsequently summarized.