title: Effects of dietary dried whey and corn oil on weanling pig performance, fat digestibility and nitrogen utilization.
abstract: Two experiments were conducted to evaluate the effects and interactions of dietary levels of corn oil (0 vs 6%) and dried whey (0 vs 25%) on performance of young pigs during a 4-wk postweaning period. The first experiment, conducted in five replicates as a 2 x 2 factorial in a randomized block design, evaluated gain and feed intakes of 172 pigs weaned at 21 d of age. Pigs were bled at weekly intervals, and samples were assayed for serum triglyceride and urea concentrations. In a second experiment, 36 barrows in three replicates were used to evaluate the same treatments on apparent digestibility and absorption of fat and N retention during each week of a 4-wk postweaning period. The dietary inclusion of dried whey resulted in greater gains and feed intakes and reduced feed-to-gain ratios during each week of the postweaning period, with the largest relative improvement occurring during wk 1. Supplemental corn oil did not enhance pig gains the first 3 wk postweaning, but response improved by wk 4. Feed intakes were slightly (P less than .10) lower when corn oil was provided. The inclusion of corn oil resulted in an improved feed-to-gain ratio (P less than .01), particularly evident during wk 3 and 4 postweaning. Neither gain nor feed utilization were improved by added corn oil during the initial 2-wk postweaning period regardless of dried whey addition. Apparent digestibilities of fat were unaffected at each weekly interval by dietary dried whey inclusion.(ABSTRACT TRUNCATED AT 250 WORDS)
authors.affiliation: Anim. Sci. Dept., Ohio State University, Columbus.
authors.forename: K R
authors.initials: KR
authors.lastname: Cera
authors.forename: D C
authors.initials: DC
authors.lastname: Mahan
authors.forename: G A
authors.initials: GA
authors.lastname: Reinhart
mesh_terms: D000818:Animals; D001835:Body Weight / Q000187:drug effects*; D003314:Corn Oil / Q000494:pharmacology*; D004041:Dietary Fats / Q000378:metabolism*; D004063:Digestion / Q000187:drug effects*; D007785:Lactose / Q000494:pharmacology*; D008297:Male; D009584:Nitrogen / Q000378:metabolism*; D010938:Plant Oils / Q000494:pharmacology*; D013552:Swine / Q000254:growth & development*; D014886:Weaning
chemical_list: D004041:Dietary Fats; D010938:Plant Oils; D003314:Corn Oil; D007785:Lactose; D009584:Nitrogen