title: Dietary effects of distillers dried grains with solubles on performance and milk composition of lactating sows.
abstract: A study was conducted to evaluate the dietary effect of adding increasing concentrations of distillers dried grains with solubles (DDGS) to corn- and soybean meal-based sow lactation diets on sow and litter performance, energy and N digestibility, plasma urea N (PUN), and milk fat and protein concentrations. Mixed-parity sows [n = 307; 221 ± 15 kg of BW, 4.54 parities, litter size of 10.6, and litter weight at birth (alive) of 15.14 kg] were assigned randomly to 1 of 5 dietary treatments: control (CON; corn-soybean meal); 10, 20, and 30% DDGS; and 30% DDGS high-protein (HP) diets. Sows were moved to farrowing rooms on d 109 of gestation and were fed the dietary treatments until weaning. Within each treatment group, feces and urine for energy and N digestibility analysis (from d 10 to 12 of lactation) and blood for PUN analysis and milk fat and protein concentrations (on d 0 and 19 of lactation) were collected from 6 randomly chosen parity 3 to 5 sows. There were no dietary effects (P = 0.10) of DDGS on ADFI of sows and sow backfat change. However, sows fed 30% DDGS HP lost more BW compared with sows fed CON (P < 0.05). There were no dietary effects (P = 0.71) of DDGS on preweaning mortality of piglets, litter weight gain, and piglet ADG. Dietary treatments did not affect (P > 0.05) DE, ME, N retention, or N digestibility of the diets. There were no differences in the concentrations of fat and protein in milk at weaning (d 19) among dietary treatments. Sows fed 20 and 30% DDGS had less (P < 0.05) PUN at weaning (d 19) than sows fed CON and 30% DDGS HP. Inclusion of up to 30% DDGS in a lactation diet did not affect (P > 0.05) sow and litter performance, DE and ME contents of the diets, N retention and digestibility, and milk composition compared with sows fed a corn-soybean meal CON diet. It was concluded that addition of up to 30% DDGS in a lactation diet will support satisfactory sow and litter performance.
authors.affiliation: Department of Animal Science, University of Minnesota, St. Paul, MN 55108, USA.
authors.forename: M
authors.initials: M
authors.lastname: Song
authors.forename: S K
authors.initials: SK
authors.lastname: Baidoo
authors.forename: G C
authors.initials: GC
authors.lastname: Shurson
authors.forename: M H
authors.initials: MH
authors.lastname: Whitney
authors.forename: L J
authors.initials: LJ
authors.lastname: Johnston
authors.forename: D D
authors.initials: DD
authors.lastname: Gallaher
mesh_terms: D000821:Animal Feed; D000818:Animals; D004032:Diet / Q000662:veterinary*; D004044:Dietary Proteins / Q000378:metabolism; D004063:Digestion / Q000502:physiology; D002523:Edible Grain; D004734:Energy Metabolism / Q000502:physiology; D005260:Female; D007774:Lactation / Q000502:physiology*; D008892:Milk / Q000737:chemistry*; D008894:Milk Proteins / Q000032:analysis; D009584:Nitrogen / Q000378:metabolism; D013025:Glycine max; D013552:Swine / Q000254:growth & development* / Q000502:physiology; D015430:Weight Gain / Q000502:physiology; D003313:Zea mays
chemical_list: D004044:Dietary Proteins; D008894:Milk Proteins; D009584:Nitrogen