作者: R. M. Humphrey , Z. Yang , M. S. Hasan , M. A. Crenshaw , D. D. Burnett
DOI: 10.1017/JAN.2018.5
关键词:
摘要: Compensatory gain describes an accelerated growth seen in animals following a period of nutrient restriction. Methionine (Met) is the second limiting amino acid typical swine diets and essential for muscle growth. This study was conducted to determine (1) if Met-deficient diet can cause retardation growing pigs, (2) returning normal feeding yield compensatory pigs previously fed diet, (3) this Met-deficiency followed by program affects carcass characteristics. Twenty individually-penned crossbred young barrows were randomly allotted two dietary treatments (n = 10). One (D1) one Met-adequate (D2) formulated based on corn soybean meal respective 31 days. After that, all same commercial grower-finisher until market weight (around 125 kg), then slaughtered, characteristics measured. The D1 D2 began with similar body weights (23.5 vs. 23.6 kg; P 0.935), but after 31-days treatments, lighter than (51.6 55.0 0.102). 55 days, had (122.7 122.6 0.989). In terms characteristics, however, thicker back-fat (at 10th rib; 2.95 2.51 cm; 0.015), heavier belly (11.0 9.6 0.005), ham (untrimmed: 20.8 21.6 0.043; trimmed: 19.6 20.6 0.016), picnic shoulder (8.72 9.80 0.041), total lean cut (51.8 53.8 0.055), lower percentage (56.4 59.0%; 0.012). These results indicate that produced growth-retarded which showed feeding. At slaughter, more fat less tissue their non-deficient counterparts.