Batchu Phaneendra, Hazard Toni, Lee Jung H, Terrill Thomas H, Kouakou Brou, Kannan Govind
Agricultural Research Station, Fort Valley State University, Fort Valley, GA 31030, USA.
Animals (Basel). 2021 Sep 30;11(10):2857. doi: 10.3390/ani11102857.
Feeding condensed tannin (CT)-containing diets such as sericea lespedeza () and reducing stress have been reported to improve meat quality and food safety in goats. In a completely randomized design with split-plot, thirty-six uncastrated male Spanish goats were assigned to 3 dietary treatments (n = 12/treatment): ground 'Serala' sericea lespedeza hay (SER), bermudagrass () hay (BG), or bermudagrass hay-dewormed goats (BG-DW; Control) at 75% of intake, with a corn-based supplementation (25%) for 8 weeks. Prior to slaughter, goats were either transported for 90 min to impose stress or held in pens. Basophil counts were lower ( < 0.01) in the SER group compared to BG or BG-DW groups suggesting a better anti-inflammatory capacity due to polyphenols in the SER diet. Compared to BG-DW group, cortisol level was higher ( < 0.05) and norepinephrine was lower ( < 0.05) in the SER group. The SER group had the lowest aerobic plate counts (APC) in both rumen and rectum ( < 0.01). muscle initial pH was not affected by diet or stress. Feeding sericea hay to goats may have beneficial effects, such as enhanced antioxidant and anti-inflammatory properties during stress and reduced gut microbial counts, without changing meat quality characteristics.
据报道，给山羊饲喂含有缩合单宁（CT）的日粮，如绢毛胡枝子，并减轻应激，可改善羊肉品质和食品安全。在一项裂区完全随机设计中，将36只未阉割的雄性西班牙山羊分配到3种日粮处理组（每组n = 12）：粉碎的“Serala”绢毛胡枝子干草（SER）、百慕大草干草（BG）或百慕大草干草-驱虫山羊（BG-DW；对照组），摄入量的75%为上述干草，另外25%为玉米基补充料，持续8周。在屠宰前，山羊要么被运输90分钟以施加应激，要么被关在围栏里。与BG或BG-DW组相比，SER组的嗜碱性粒细胞计数更低（P < 0.01），这表明SER日粮中的多酚具有更好的抗炎能力。与BG-DW组相比，SER组的皮质醇水平更高（P < 0.05），去甲肾上腺素水平更低（P < 0.05）。SER组瘤胃和直肠中的好氧平板计数（APC）最低（P < 0.01）。肌肉初始pH值不受日粮或应激的影响。给山羊饲喂绢毛胡枝子干草可能具有有益效果，例如在应激期间增强抗氧化和抗炎特性，并减少肠道微生物数量，同时不改变肉质特征。
