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The influence of methionine supplementation of 12, 14, and 16% protein corn-soybean oil meal diets upon nitrogen balance of grow-ing swine



The influence of methionine supplementation of 12, 14, and 16% protein corn-soybean oil meal diets upon nitrogen balance of grow-ing swine



J Nutrition 60(4): 599-608



Typical corn-soy-bean oil meal diets containing 11.8, 13.8 and 15.8% of crude protein, adequate in non-protein dietary factors and containing lysine equivalent to 5% of the dietary protein were supplemented with 0, 0.025, 0.05 and 0.10% of DL-methionine in the presence and absence of 0.04% of sup-plementatal DL-tryptophan. Four nitrogen retention values obtained by covariance analysis showed a highly significant depression in amount of nitrogen retained when growing pigs were fed the 11.8% crude pro-tein diet supplemented with 0.10% of DL-methionine in the presence of 0.04% of supplemental DL-tryptophan. Methionine supplementation did not significantly affect nitrogen retention of pigs fed the two higher protein diets. Highly significant differences in nitrogen retention of growing pigs resulted due to level of dietary protein. Although pigs fed the higher protein level retained more nitrogen, the values of 0.85 to 098 gm of nitrogen retained per W[image] by the pigs fed the 13.8% protein diet were considered to be satisfactory. Final levels of 0.126, 0.27, and 0.69% of tryptophan, methionine, and lysine, respectively, in an approximately 14% crude protein diet were adequate to promote satisfactory amino acid nutrition of growing pigs.

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The influence of methionine supplementation of 12, 14 and 16 percent protein corn-soybean oil meal diets upon nitrogen balance of growing swine. J. Nutrition. 60: 599-608, 1956

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