Ding He, Liu Wangjing, Erdene Khas, Du Hongxi, Ao Changjin
Key Laboratory of Animal Feed and Nutrition of Inner Mongolia Autonomous Region, College of Animal Science, Inner Mongolia Agricultural University, Hohhot 010018, China.
Anim Nutr. 2021 Jun;7(2):530-538. doi: 10.1016/j.aninu.2021.04.001. Epub 2021 Apr 20.
The present study was to evaluate the effects of dried Regel (AMR) powder and its water- and fat-soluble extracts (AWE and AFE) on the growth performance, serum metabolites, immune responses, antioxidant status, and meat quality of lambs. A total of 32 male small-tailed Han lambs (5 months old; initial body weight = 34.8 ± 0.40 kg) were used in a 60-d feeding experiment after a 15-d adaptation period. The lambs were randomly divided into 4 groups ( 8) and fed a basal diet (control, CON group), the basal diet supplemented with dried AMR powder at 10 g/d per lamb (AMR group), the basal diet supplemented with AWE at 3.4 g/d per lamb (AWE group), or the basal diet supplemented with AFE at 2.8 g/d per lamb (AFE group). Blood samples were collected on d 0, 30, and 60 in the feeding experiment ( 8). At the end of the experiment, the lambs were sacrificed and the longissimus dorsi muscles collected. Growth performance was not significantly affected by dietary supplementation of AMR, AWE and AFE ( > 0.05). However, significantly lower albumin ( = 0.006), total protein ( = 0.006), globin ( = 0.025), and blood urea nitrogen ( = 0.024) concentrations were observed in AFE group relative to CON and AMR groups. Similarly, a significantly lower lactate dehydrogenase activity ( = 0.018) was observed in AFE group relative to AWE group, but not in other groups ( > 0.05). In addition, significantly increasing trends in glutathione peroxidase ( = 0.06) in AMR, AWE, and AFE groups were observed relative to the control group. Furthermore, significantly lower drip loss ( = 0.011) across the treatment groups and cooking loss ( = 0.048) were observed in the AMR group relative to the control group. Taken together, these results indicate that AMR and its extracts had no significant effect on lamb growth performance, antioxidant status, and immune responses, but could significantly improve meat quality without the occurrence of pathological kidney and liver lesions.
本研究旨在评估地锦草干粉及其水溶性和脂溶性提取物（AWE和AFE）对羔羊生长性能、血清代谢产物、免疫反应、抗氧化状态和肉质的影响。在15天的适应期后，选用32只雄性小尾寒羊羔羊（5月龄；初始体重=34.8±0.40千克）进行为期60天的饲养试验。将羔羊随机分为4组（每组8只），分别饲喂基础日粮（对照组，CON组）、基础日粮中每只羔羊每天添加10克地锦草干粉（AMR组）、基础日粮中每只羔羊每天添加3.4克AWE（AWE组）或基础日粮中每只羔羊每天添加2.8克AFE（AFE组）。在饲养试验的第0、30和60天采集血样（每组8只）。试验结束时，宰杀羔羊并采集背最长肌。日粮添加地锦草、AWE和AFE对生长性能无显著影响（P>0.05）。然而，与CON组和AMR组相比，AFE组的白蛋白（P=0.006）、总蛋白（P=0.006）、球蛋白（P=0.025）和血尿素氮（P=0.024）浓度显著降低。同样，与AWE组相比，AFE组的乳酸脱氢酶活性显著降低（P=0.018），但在其他组中无显著差异（P>0.05）。此外，与对照组相比，AMR、AWE和AFE组的谷胱甘肽过氧化物酶有显著增加趋势（P=0.06）。此外，与对照组相比，AMR组的处理组滴水损失（P=0.011）和烹饪损失（P=0.048）显著降低。综上所述，这些结果表明，地锦草及其提取物对羔羊生长性能、抗氧化状态和免疫反应无显著影响，但可显著改善肉质，且未出现肾脏和肝脏病理损伤。
