title: Nitrogen balance during compensatory growth when changing the levels of dietary lysine from deficiency to sufficiency in growing pigs.
abstract: Two experiments were conducted to elucidate the nitrogen (N) balance of pigs exhibiting compensatory growth when changing the dietary lysine levels from deficiency to sufficiency. Experiment 1 elucidated whether pigs exhibited compensatory growth with dietary lysine sufficiency. Twenty 6-week-old males were assigned to one of two treatments: control and LC (lysine and control). Control pigs were fed a control diet throughout the 24-day experimental period, whereas LC pigs were fed a low lysine diet until day 21 of the experiment, followed by the control diet until the end of experiment. The dietary lysine sufficiency treatment induced an 80% increase in the growth rate of LC pigs (P < 0.05). Experiment 2 focused on the N balance of pigs that exhibited compensatory growth with dietary lysine sufficiency. Eighteen 6-week-old males were assigned to one of three treatments: control, LC, and LL (low lysine). LL pigs were fed a low lysine diet throughout the 24-day experimental period. Pigs that exhibited compensatory growth with dietary lysine sufficiency tended to retain a higher amount of N than control pigs (P = 0.10). These finding suggest that the compensatory growth induced in pigs by dietary lysine sufficiency was partly attributable to a higher level of N retention.
authors.affiliation: National Institute of Livestock and Grassland Science Graduate School of Life and Environmental Sciences, Tsukuba, Ibaraki, Japan. aiko15@affrc.go.jp
authors.forename: Aiko
authors.initials: A
authors.lastname: Ishida
authors.forename: Takahito
authors.initials: T
authors.lastname: Kyoya
authors.forename: Kazuki
authors.initials: K
authors.lastname: Nakashima
authors.forename: Masaya
authors.initials: M
authors.lastname: Katsumata
mesh_terms: D000821:Animal Feed / Q000032:analysis*; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D004032:Diet / Q000662:veterinary*; D007334:Insulin-Like Growth Factor I / Q000378:metabolism; D008239:Lysine / Q000008:administration & dosage* / Q000097:blood / Q000172:deficiency*; D008297:Male; D009584:Nitrogen / Q000378:metabolism*; D013552:Swine / Q000254:growth & development* / Q000378:metabolism*
chemical_list: D007334:Insulin-Like Growth Factor I; D008239:Lysine; D009584:Nitrogen