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Dietary N-Carbamylglutamate Supplementation in a Reduced Protein Diet Affects Carcass Traits and the Profile of Muscle Amino Acids and Fatty Acids in Finishing Pigs.
Journal of Agricultural and Food Chemistry 2017 July 20
The aim of this study was to investigate whether dietary N-carbamylglutamate (NCG) supplementation in a reduced protein diet affected carcass traits and meat quality in finishing pigs. A total of 120 gilts were randomly assigned to one of four treatments for 40 days, including a standard protein diet (SP), a reduced protein diet supplemented with 1.7% l-alanine (RP + Ala), a reduced protein diet supplemented with 1.0% l-arginine (RP + Arg), and a reduced protein diet supplemented with 0.1% NCG and 1.7% l-alanine (RP + NCG). NCG supplementation increased the endogenous synthesis of l-arginine. The RP + NCG diet significantly increased the loin eye area (p < 0.05) and tended to decrease the 10th rib fat depth (p = 0.08). NCG supplementation in a reduced protein diet was effective to produce functional pork with a high content of leucine (p < 0.05). The composition of several ω-6 and ω-3 polyunsaturated fatty acids (PUFAs) but not the ratio of ω-6/ω-3 PUFAs in muscles was altered in finishing pigs with dietary NCG supplementation. In conclusion, the RP + NCG diet is effective to increase the longissimus dorsi muscle area, decrease back fat accretion, and produce functional pork with a high content of leucine but without a negative impact on the muscle fatty acid profile in finishing pigs.
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