title: Utilization by growing and finishing pigs of raw soybeans of low Kunitz trypsin inhibitor content.
abstract: Three trials were conducted to compare acceptance and utilization by growing and finishing pigs of diets containing supplemental protein from either heated, solvent-extracted soybean meal (SBM), raw low-Kunitz trypsin inhibitor soybean (LT) or raw commercially grown Williams cultivar soybean with high Kunitz trypsin inhibitor content (HT). In Trial 1, 36 crossbred pigs, averaging 7 kg in weight, were fed 1) corn-SBM, 2)corn-LT or 3) corn-HT diets for 28 d. Diets were formulated to be isolysinic and to have similar calorie:lysine ratios. Average daily gain and gain/feed were higher (P less than .01) for pigs fed the corn-SBM diet than for pigs fed the corn-LT diet; average daily gain and gain/feed were higher (P less than .01) for the corn-LT diet than for the corn-HT. Average daily feed intake did not differ (P greater than .05) among diets. In Trial 2, 48 crossbred pigs averaging 67 kg were fed diets similar to those in Trial 1 but with lower lysine values. The daily gain (.95 kg) of pigs fed the corn-SBM diet was greater (P less than .05) than for pigs fed the corn-LT diet (.87 kg), which in turn was greater (P less than .05) than for the pigs fed the corn-HT diet (.83 kg). Daily feed intake (kg) and gain/feed were 3.27 and .291, 2.97 and .293, and 3.07 and .270, respectively, for pigs fed the corn-SBM, corn-LT and corn-HT diets. In Trial 3, 18 castrate male pigs averaging 12.4 kg were fed cornstarch-based diets with either SBM, LT or HT as the source of protein.(ABSTRACT TRUNCATED AT 250 WORDS)
authors.affiliation: University of Illinois, Urbana 61801.
authors.forename: D A
authors.initials: DA
authors.lastname: Cook
authors.forename: A H
authors.initials: AH
authors.lastname: Jensen
authors.forename: J R
authors.initials: JR
authors.lastname: Fraley
authors.forename: T
authors.initials: T
authors.lastname: Hymowitz
mesh_terms: D000821:Animal Feed; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D001835:Body Weight; D005260:Female; D008297:Male; D013025:Glycine max; D013552:Swine / Q000254:growth & development*; D014360:Trypsin Inhibitor, Kunitz Soybean; D014361:Trypsin Inhibitors
chemical_list: D014361:Trypsin Inhibitors; D014360:Trypsin Inhibitor, Kunitz Soybean