title: The nutritional value of high-protein corn distillers dried grains for broiler chickens and its effect on nutrient excretion.
abstract: Two experiments were conducted with a co-product of corn endosperm fermentation. The first experiment determined nutrient digestibility of high-protein corn distillers dried grains (HP-DDG; 54% CP) after feeding semipurified diets from 15 to 22 d of age. The AMEn of HP-DDG was 2,526 kcal/kg, whereas standardized ileal Lys, Met, and Thr digestibilities were 73.0, 84.9, and 73.0%, respectively. In a second experiment, an industry control diet (I) regimen was compared with that of either an approximate 25 or 50% replacement for the level of 48% CP soybean meal (SBM) inclusion in the diet utilizing the amino acid digestibility and AMEn determined from the first experiment. From 0 to 14, 14 to 28, and 28 to 42 d of age, the HP-DDG in the 50% SBM replacement diet was added at 25, 23.5, and 21% of the diet, respectively. To meet digestible amino acid needs, the diet containing 50% SBM replacement with HP-DDG contained 3.2, 3.6, and 4.4% units more CP than the I diet regimen from 1 to 14, 14 to 28, and 28 to 42 d of age, respectively. Dietary replacement of up to 50% of SBM inclusion with HP-DDG had no effect on bird performance at 14 or 42 d of age or breast fillet yield at 42 d of age; however, it decreased BW gain and increased feed:gain ratio from 14 to 28 d of age. Birds consuming a diet with 50% replacement of SBM with HP-DDG consumed 17.1% more N compared with those consuming I diets. This additional N and fiber consumed resulted in birds being fed the 50% replacement for SBM diet excreting 21.9 and 31.8% more manure DM and N, respectively. Due in large part to the amino acid profile and digestibility of HP-DDG, use of this feedstuff as a large proportion of the diet is feasible but results in more manure and manure N from broilers.
authors.affiliation: Purdue University, Department of Animal Sciences, West Lafayette, IN 47907, USA. applegt@purdue.edu
authors.forename: T J
authors.initials: TJ
authors.lastname: Applegate
authors.forename: C
authors.initials: C
authors.lastname: Troche
authors.forename: Z
authors.initials: Z
authors.lastname: Jiang
authors.forename: T
authors.initials: T
authors.lastname: Johnson
mesh_terms: D000821:Animal Feed / Q000032:analysis*; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D004032:Diet / Q000662:veterinary*; D004043:Dietary Fiber / Q000008:administration & dosage / Q000378:metabolism*; D004044:Dietary Proteins / Q000032:analysis / Q000378:metabolism*; D008297:Male; D008460:Meat / Q000592:standards; D009584:Nitrogen / Q000378:metabolism; D011897:Random Allocation; D003313:Zea mays
chemical_list: D004043:Dietary Fiber; D004044:Dietary Proteins; D009584:Nitrogen