Composition analysis of pork carcasses by dual-energy x-ray absorptiometry.

摘要: Dual-energy x-ray absorptiometry (DXA) was used as a noninvasive method to measure the composition of pig carcasses. A total 181 half-carcasses (10 51 kg, from pigs slaughtered at approximately 30, 60, 90, and 120 kg) were scanned using Lunar (Madison, WI) DPX-L densitometer. The DXA measurements fat, lean, bone mineral, tissue mass compared with chemical analysis for water, protein, ash, scale weight. mean value by slightly less than carcass weight (32.3 kg vs 33.6 P > .05, R2 = .998). Although highly correlated (R2 .81), measurement percentage fat in half-carcass (P .05). Similarly, protein water content predicted lean. Using region interest analysis, estimates shoulder ham regions close values; however, underestimated loin side 20 28%, respectively. When prediction equations evaluate 28 gilts 37 boars contained more (33.9 27.8%, < .001), (14.1 16.1%, (45.9 52.1%, .001) those boars. These results indicate that could be valuable research tool measuring On basis this study, revised estimation half-carcass: Fat (%) 450 - (315 x R value), Protein (g) -145 + (.23 lean), Water 150 (.73 lean). Furthermore, it seems separate are needed regional analysis.