Effects of Different Feeding Modes on Meat Quality of Duolang Sheep
YAN Xianglin1, REN Xiaopu1,2, LIU Rui1, CHENG Yuping1, ZHANG Shuxiang1, ZHANG Wangang1, ZHOU Guanghong1,*
1. Key Laboratory of Meat Processing and Quality Control, Ministry of Education, Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China; 2. Construction Corps Key Laboratory of Special Agricultural Products Further Processing in Southern Xinjiang, College of Life Sciences, Tarim University, Alar 843300, China
Abstract：The longissimus dorsi muscles of Duolang sheep slaughtered at the age of 6 months in factory farming and Gobi desert stocking were used to investigate the differences in slaughter performance, pH, water-holding capacity (WHC), tenderness, color, antioxidant ability, fatty acid content and the ultrastructure of myofibrils. The results showed that the tenderness, lightness after 7 days of maturation and total fatty acids in the factory farming group were better than those in the Gobi desert stocking group (P < 0.05). The WHC, antioxidant ability, redness at day 1 postmortem and polyunsaturated fatty acids in the Gobi desert stocking group were better than those in the factory farming group (P < 0.05). Compared with the Gobi desert stocking group, bigger myofibril density, smaller myofibril diameter and closer myofibril arrangement were observed for the factory farming group. In conclusion, both feeding modes have their own advantages for the meat quality of Duolang sheep and in actual practice, the existing feeding conditions should be improved for producing high-quality mutton.