da Silva Débora Cristina Fernandes, de Arruda Alex Martins Varela, Gonçalves Alex Augusto
Agricultural Sciences Center (CCA), Federal Rural University of Semi-Arid (UFERSA), Av. Francisco Mota, 572, Presidente Costa e Silva, Mossoró, RN 59625-900 Brazil.
J Food Sci Technol. 2017 Jun;54(7):1818-1826. doi: 10.1007/s13197-017-2612-x. Epub 2017 Apr 10.
The aim of this study was to determine and compare the quality parameters of broiler chicken meat from free-range and industrial poultry system. Proximate composition, color, pH, shear force, microbial quality and sensory characteristics were evaluated. Both free-range and industrial chicken meat presented PSE (pale, soft and exudative) anomaly (* > 53). An inverse correlation between lightness, pH and shear force was observed. The free range broiler meat had higher yellow color (* 11.56) and shear force (2.75 kgf) and lower red color (* 1.65) and pH (5.75) in comparison to the industrial broiler meat, due intensive physical activity on growing phase and influence of the pre-slaughter stress on the rigor mortis. The thigh cut from free range broiler meat showed higher protein levels (18.00%), while to the thigh and drumstick cuts of industrial broiler meat showed higher total fat levels (3.4 and 5.0%, respectively). In general, each strain and chickens producing methods gave the peculiar characteristics to meat (chemical, physical, microbiological and sensorial).
本研究旨在测定和比较散养和工业化家禽养殖系统中肉鸡的肉质参数。对其近似成分、颜色、pH值、剪切力、微生物质量和感官特性进行了评估。散养和工业化养殖的鸡肉均出现了PSE(苍白、柔软、渗水)异常(*>53)。观察到亮度、pH值和剪切力之间呈负相关。与工业化养殖的肉鸡相比,散养肉鸡的肉黄色度更高(*11.56)、剪切力更大(2.75千克力),红色度更低(*1.65)、pH值更低(5.75),这归因于生长阶段的高强度体力活动以及宰前应激对尸僵的影响。散养肉鸡大腿部位的肉蛋白质含量较高(18.00%),而工业化养殖肉鸡的大腿和小腿部位的肉总脂肪含量较高(分别为3.4%和5.0%)。总体而言,每种品系和养殖方式都赋予了鸡肉独特的特性(化学、物理、微生物和感官方面)。