title: Efficacy of dried whey and its lactalbumin and lactose components at two dietary lysine levels on postweaning pig performance and nitrogen balance.
abstract: Two experiments were conducted to determine the efficacy of lactalbumin and lactose components of dried whey on gain and feed performance responses and N retention of weanling swine. In Exp. 1, a 2 x 5 factorial arrangement of treatments in a randomized complete block design in seven replicates was used to evaluate the efficacy of two dietary lysine levels (.90 and 1.30%) in 1) a corn-soybean meal (C-SBM) mixture, 2) C-SBM and 20% dried whey (C-SBM-DW), or the dried whey component replaced with 3 lactalbumin and cornstarch, 4) lactose and an amino acid mixture, or 5) the combination of lactalbumin and lactose. A total of 420 pigs weaned at 23 +/- 2 d of age, weighing an average of 6.87 kg BW, were used in a 3-wk experiment. Experiment 2 was a balance trial conducted as a 3 x 2 x 3 factorial arrangement in a split-plot design in three replicates. The negative (i.e., C-SBM) and positive (i.e., C-SBM-DS) control diets and the C-SBM-lactalbumin-cornstarch diets at the two lysine levels of Exp. 1 were the main plots, each evaluated for a 3-wk postweaning period. Growth rate (P less than .05), feed intake (P less than .01), N retention (P less than .01), and apparent N digestibility (P less than .05) were increased when pigs were fed the C-SBM-DW compared with the C-SBM diet.(ABSTRACT TRUNCATED AT 250 WORDS)
authors.affiliation: Department of Animal Science, Ohio State University, Columbus 43210-1095.
authors.forename: D C
authors.initials: DC
authors.lastname: Mahan
mesh_terms: D000596:Amino Acids / Q000008:administration & dosage; D000821:Animal Feed; D000818:Animals; D004063:Digestion; D004435:Eating; D005260:Female; D007768:Lactalbumin / Q000008:administration & dosage*; D007785:Lactose / Q000008:administration & dosage*; D008239:Lysine / Q000008:administration & dosage*; D008297:Male; D009584:Nitrogen / Q000378:metabolism*; D011897:Random Allocation; D013213:Starch; D013552:Swine / Q000254:growth & development* / Q000378:metabolism; D014886:Weaning; D015430:Weight Gain
chemical_list: D000596:Amino Acids; D013213:Starch; D007768:Lactalbumin; D007785:Lactose; D008239:Lysine; D009584:Nitrogen