Wu Pu, Fu Xiaoyue, Wang Hucheng, Hou Mingjie, Shang Zhanhuan
State Key Laboratory of Grassland Agro-Ecosystems, Engineering Research Center of Grassland Industry, Ministry of Education, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China.
State Key Laboratory of Grassland Agro-Ecosystems, College of Life Sciences, Lanzhou University, Lanzhou 730000, China.
Animals (Basel). 2021 Oct 31;11(11):3120. doi: 10.3390/ani11113120.
Diet and breed directly affect ruminant carcass traits and meat quality. Therefore, this research aimed to evaluate the effect of silage diet and breed on growth performance, carcass traits, and meat quality of lambs. A total of 28, 3-4 months old female lambs consisting of 14 Dorper lambs (DP) and 14 Thin-tailed Han lambs (TH) were allocated in a 2 × 2 factorial design and offered two experimental diets (sweet sorghum silage: SS; whole-crop corn silage: WS) for 90 days. Lambs fed the WS diet had a higher growth performance ( < 0.01), intramuscular fat content ( < 0.05), and bright meat color ( < 0.01) than lambs fed the SS diet. The lambs fed the SS diet showed a higher polyunsaturated fatty acid (PUFA) content than the lambs fed the WS diet ( < 0.01); there was no significant difference in growth performance and carcass characteristics between DP and TH lambs ( > 0.05). The meat of the DP lambs showed lower values of initial pH, shear force, lightness (L*), redness (a*), and saturated fatty acid (SFA) content ( < 0.05). The lamb breed influenced fewer variables of growth performance and carcass characteristics compared to the diet. The lambs fed the SS diet had higher nutritional quality meat than lambs fed the WS diet.
日粮和品种直接影响反刍动物胴体性状和肉质。因此，本研究旨在评估青贮日粮和品种对羔羊生长性能、胴体性状和肉质的影响。将28只3 - 4月龄的雌性羔羊（其中14只杜泊羔羊（DP）和14只小尾寒羊（TH））按2×2析因设计进行分配，并给予两种试验日粮（甜高粱青贮：SS；全株玉米青贮：WS），为期90天。与饲喂SS日粮的羔羊相比，饲喂WS日粮的羔羊具有更高的生长性能（P<0.01）、肌内脂肪含量（P<0.05）和肉色亮度（P<0.01）。饲喂SS日粮的羔羊比饲喂WS日粮的羔羊表现出更高的多不饱和脂肪酸（PUFA）含量（P<0.01）；DP和TH羔羊在生长性能和胴体特征方面没有显著差异（P>0.05）。DP羔羊的肉在初始pH值、剪切力、亮度（L*）、红度（a*）和饱和脂肪酸（SFA）含量方面较低（P<0.05）。与日粮相比，羔羊品种对生长性能和胴体特征变量的影响较小。饲喂SS日粮的羔羊比饲喂WS日粮的羔羊具有更高的肉营养品质。
