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Improving the nutritive value of corn distillers dried grains with solubles (DDGS) for growing pigs: Evaluation of processing and fiber degrading enzymes in liquid environment

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Title: Improving the nutritive value of corn distillers dried grains with solubles (DDGS) for growing pigs: Evaluation of processing and fiber degrading enzymes in liquid environment
Author: Rho, Youngji
Department: Department of Animal Biosciences
Program: Animal and Poultry Science
Advisor: de Lange, Cornelis F. M.Kiarie, Elijah
Abstract: Three experiments were conducted to evaluate strategies to improve nutritive value of corn DDGS for grower-finisher pigs: 1) use of novel physical processing technology designed to reduce fiber content in DDGS to produce high protein DDGS (HP-DDGS) (Experiment 1), and 2) application of fiber degrading enzymes (FDE) with liquid fermentation (LF) (Experiment 2) and liquid steeping (LS) (Experiment 3). Novel HP-DDGS had greater amounts of digestible AA and energy than conventional DDGS. Feeding pigs DDGS treated with FDE with (without) LF improved feed efficiency in phase I (weeks 0-3) but there were no growth performance or digestibility effects in phase II (weeks 4-6) compared with pigs fed non-treated DDGS. Moreover, pigs fed DDGS treated with FDE in conjunction with LF exhibited lower growth performance and gross energy digestibility compared with pigs fed DDGS treated with FDE without LF in phase II. Treating DDGS with FDE for 24 h in LS did not affect gross energy digestibility in growing pigs. Physical removal of fiber improved digestible nutrient content in DDGS. Fiber degrading enzymes showed potential for improving the nutritive value of DDGS for growing pigs. However, further research is required to refine enzyme application in a liquid environment.
URI: http://hdl.handle.net/10214/11572
Date: 2017-09-08


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