Evaluation of High-Protein Distillers Dried Grains on Growth Performance and Carcass Characteristics of Growing-Finishing Pigs

Authors

Z. X. Rao, Kansas State UniversityFollow
R. D. Goodband, Department of Animal Science and Industry, Kansas State UniversityFollow
M. D. Tokach, Department of Animal Science and Industry, Kansas State UniversityFollow
S. S. Dritz, Kansas State University, ManhattanFollow
J. C. Woodworth, Kansas State UniversityFollow
J. M. DeRouchey, Kansas State University, ManhattanFollow
H. I. Calderón, Kansas State UniversityFollow
M. F. Wilken, ICM, Colwich, Kansas

Keywords

distillers dried grains with solubles, finishing pigs, high protein distillers dried grains

Abstract

A total of 1,890 growing-finishing pigs (PIC; 359 × 1050; initially 59.8 ± 1.3 lb) were used in a 124-d growth trial to compare the effects of high-protein distillers dried grains (HPDDG) or conventional distillers dried grains with solubles (DDGS) on growth performance and carcass characteristics. Conventional DDGS contained 29.0% CP, 0.48% standardized ileal digestible (SID) Lys, and 9.2% oil, whereas HPDDG contained 39.3% CP, 0.68% SID Lys, and 11.1% oil. All diets were formulated on an equal SID Lys-basis with diets containing HPDDG having less soybean meal than diets with conventional DDGS. There were 27 pigs per pen and 14 pens per treatment. Treatment diets were corn-soybean meal-based and arranged in a 2 × 2 + 1 factorial with main effects of DDG source (conventional DDGS or HPDDG) and level (15 or 30%). A corn-soybean meal-based diet served as the control and allowed linear and quadratic level effects to be determined within each DDG source. Pens of pigs were assigned to 1 of the 5 treatments in a randomized complete block design with initial weight as a blocking factor. Data were analyzed using the lme4 package in R (version 3.5.2) with pen as experimental unit. Overall, there were no differences observed in ADG between pigs fed either DDG source or level. Pigs fed HPDDG had decreased (linear,P<0.001) ADFI and improved F/G compared with those fed conventional DDGS. Increasing either conventional DDGS or HPDDG decreased carcass yield and HCW (linear,P<0.02); however, there were no differences between pigs fed HPDDG or conventional DDGS. Iodine value (IV) was greater (P<0.001) in pigs fed HPDDG than conventional DDGS, and IV increased (linear,P<0.02) with increasing DDG source. In summary, these data suggest that pigs fed HPDDG had better F/G, but greater IV compared with pigs fed conventional DDGS, probably due to the difference in oil content.

Recommended Citation

Rao, Z. X.; Goodband, R. D.; Tokach, M. D.; Dritz, S. S.; Woodworth, J. C.; DeRouchey, J. M.; Calderón, H. I.; and Wilken, M. F. (2020) "Evaluation of High-Protein Distillers Dried Grains on Growth Performance and Carcass Characteristics of Growing-Finishing Pigs," Kansas Agricultural Experiment Station Research Reports: Vol. 6: Iss. 10. https://doi.org/10.4148/2378-5977.7998