Amino acid supplementation of reduced protein wheat diets for growing-finishing swine

Maxwell, C.V.; Buchanan, D.S.; Luce, W.G.; Woltman, M.D.; Dietz, G.N.; Vencl, R.

Animal Science Research Report, Agricultural Experiment Station, Oklahoma State University (MP-119): 301-306


Accession: 001526321

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In 3 trials with 743 pigs supplements of a reduced-protein, hard red winter wheat-based diet were given during the growing period and a diet devoid of soyabean meal (SBM) during the finishing period. Amino acid supplements were lysine, lysine plus threonine, lysine plus threonine plus methionine or lysine plus threonine plus methionine plus isoleucine. A reduced protein diet during the growing period or a diet devoid of SBM during the finishing period with lysine resulted in reduced performance when compared to performance of pigs fed on the wheat-soyabean meal control diet. The addition of isoleucine in combination with threonine and methionine resulted in performance similar to that of growing and finishing pigs given the control diet. Additional studies are needed to determine if the isoleucine response is elicited in the absence of either threonine and/or methionine.