Abstract
Regression Analysis to Predict the Impact of High Neutral Detergent Fiber Ingredients on Carcass Yield
Highlights
Research has shown that carcass yield is reduced when feeding distillers dried grains with solubles (DDGS) or other high fiber ingredients
Data from 8 trials originating from 5 journal articles, 2 theses, and 1 technical memo were used to develop a regression equation to predict carcass yield
The regression analysis showed that number of days in the withdrawal period (WP), NDF level in the dietary phase prior to the final phase (NDF1), NDF level in the last dietary phase before marketing (NDF2), and the interaction between NDF2 and WP (NDF2 × WP), were the most important variables in the dataset to predict carcass yield
Summary
Multiple studies have investigated the impact of high fiber ingredients on swine growth and carcass characteristics. Reports have indicated that up to 30% distillers dried grains with solubles (DDGS) can be fed without compromising growth performance.[4,5,6] research has shown that carcass yield is reduced when DDGS or other. Kansas State University Agricultural Experiment Station and Cooperative Extension Service ingredients containing high concentrations of dietary NDF are fed.[7] The high NDF levels increase weight of intestinal contents at harvest.[8,9] One successful strategy to ameliorate the negative effects on carcass yield is withdrawing high NDF ingredients before harvest. Research has reported that pigs transitioned from a high NDF diet to a corn-soybean meal diet before harvest had similar carcass yield compared with pigs fed a corn-soybean meal diet during the entire finishing phase.[10,11,12] Taking into consideration the financial implications of improving carcass yield, the objective of this project was to develop prediction equations to accurately estimate the change in carcass yield from dietary NDF and NDF withdrawal strategies
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