Department of Animal Science, Federal University of Bahia, Salvador, Bahia, Brazil.
Department of Animal Science, Federal University of Paraiba, Areia, Paraíba, Brazil.
PLoS One. 2020 Nov 23;15(11):e0242822. doi: 10.1371/journal.pone.0242822. eCollection 2020.
The objective of this study was to evaluate the effects of the association of cottonseed processing method with chitosan on carcass traits and meat quality of lambs finished in feedlot. Eighty lambs with an average body weight of 20.6 kg, with 04 months of age, were distributed in a completely randomized design, in a 2 x 2 factorial arrangement. The factors were represented by two cottonseed processing method (whole or ground) and two levels of chitosan (0 and 136 mg/kg BW). The association of cottonseed processing method with chitosan in the lamb diet did not affect (P>0.05) carcasses traits. The pH, color, cooking losses, shear force, and proximate composition of meat were also not affected (P>0.05) by the processing method of cottonseed or its association with chitosan in the lamb diets. There was an increase in palmitoleic (c9-C16:1; P = 0.01) and conjugated linoleic (P = 0.02) fatty acids when ground cottonseed was associated with chitosan. Ground cottonseed associated with chitosan increases the concentration of unsaturated fatty acids in the meat of feedlot lambs.
本研究旨在评估棉籽加工方法与壳聚糖联合应用对育肥羔羊胴体特性和肉质的影响。80 只平均体重为 20.6kg、年龄为 04 个月的羔羊采用完全随机设计，分为 2x2 析因设计。两个因素分别为棉籽加工方法（整粒或粉碎）和壳聚糖水平（0 和 136mg/kgBW）。棉籽加工方法与壳聚糖在羔羊日粮中的联合应用对胴体特性没有影响（P＞0.05）。棉籽加工方法或其与壳聚糖在羔羊日粮中的联合应用也没有影响肉的 pH 值、颜色、蒸煮损失、剪切力和常规成分（P＞0.05）。当粉碎棉籽与壳聚糖联合应用时，肉中亚油酸（c9-C16:1；P = 0.01）和共轭亚油酸（P = 0.02）的含量增加。与壳聚糖联合应用的粉碎棉籽增加了育肥羔羊肉中不饱和脂肪酸的浓度。
