State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China.
State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China.
Poult Sci. 2020 Sep;99(9):4488-4495. doi: 10.1016/j.psj.2020.05.053. Epub 2020 Jun 26.
Plant extracts have been proved as natural antioxidants resources as well as alternative feed additives in livestock and poultry species. Chestnut wood extract (CWE) as a source of hydrolysable tannic acid was used to evaluate the growth performance, nutrient retention, meat quality, antioxidant status, and immune function of broilers. A total of 168, day-old Arbor Acre male broilers (weight 46.59 ± 0.44 g) were randomly divided to 3 treatments, 7 replicate pens per treatment, 8 broilers per pen. The treatments contain a control diet, CON (corn-soybean meal basal diet); an antibiotic diet, CTC (basal diet + 75 mg/kg chlortetracycline); and chestnut wood extract diet, CWE (basal diet + 1,000 mg/kg chestnut tannins). At the finisher phase, final body weight was higher (P < 0.05) in CWE supplemented diet than in CON. Average daily body weight gain was higher (P < 0.05) and feed gain ratio was lower (P < 0.05) in broilers fed CWE than in those fed CON at the finisher phase. Crude protein digestibility was higher (P < 0.05) in broilers offered CWE than that in broilers fed CON and CTC diets. Breast muscle pH value at 24 h (pH) was higher (P < 0.05) in broilers fed CWE than that in those fed CON and CTC diets. The bursa weight was higher (P < 0.05) in broilers offered CWE than that in those fed CON and CTC. Total antioxidant capacity (T-AOC), glutathione peroxidase (GSH-Px), and superoxide dismutase (SOD) values were higher (P < 0.05) in both breast muscle and thigh muscle of broilers offered CWE supplemented diet than those in broilers fed CON and CTC diets. Similarly, broilers offered with CWE diets showed higher (P < 0.05) T-AOC, GSH-PX, and SOD value in serum than those fed CON and CTC diets. Serum concentration of IgG was higher (P < 0.05) in broilers offered with CWE diets than that in those fed CON and CTC diets. Total cholesterol, low-density lipoprotein cholesterol, and urea-N concentration were lower (P < 0.05) in broilers offered CWE diet than those in broilers fed CON and CTC diets. It was recommended to supply CWE at the 1,000 mg/kg level for improving antioxidant status, cholesterol metabolism, and growth performance without affecting normal meat quality in broilers.
植物提取物已被证明是天然抗氧化剂资源，也是家畜和家禽的替代饲料添加剂。栗木提取物（CWE）作为水解单宁酸的来源，用于评估肉鸡的生长性能、养分保留、肉质、抗氧化状态和免疫功能。总共 168 只，1 日龄 Arbor Acre 雄性肉鸡（体重 46.59 ± 0.44 克）被随机分为 3 个处理组，每个处理组 7 个重复笼，每个笼 8 只肉鸡。处理组包含对照饮食（CON）（玉米-豆粕基础饮食）；抗生素饮食（CTC）（基础饮食+75mg/kg 金霉素）；栗木提取物饮食（CWE）（基础饮食+1000mg/kg 栗单宁）。在育肥阶段，补充 CWE 的饮食组的最终体重高于 CON 组（P<0.05）。在育肥阶段，与 CON 组相比，补充 CWE 的肉鸡的平均日增重更高（P<0.05），饲料增重比更低（P<0.05）。补充 CWE 的肉鸡的粗蛋白消化率高于 CON 和 CTC 组（P<0.05）。补充 CWE 的肉鸡的胸肌 24 小时 pH 值（pH）高于 CON 和 CTC 组（P<0.05）。补充 CWE 的肉鸡的法氏囊重量高于 CON 和 CTC 组（P<0.05）。补充 CWE 的肉鸡的胸肌和腿肌的总抗氧化能力（T-AOC）、谷胱甘肽过氧化物酶（GSH-Px）和超氧化物歧化酶（SOD）值均高于 CON 和 CTC 组（P<0.05）。同样，补充 CWE 饮食的肉鸡的血清中的 T-AOC、GSH-PX 和 SOD 值也高于 CON 和 CTC 组（P<0.05）。补充 CWE 饮食的肉鸡的血清 IgG 浓度高于 CON 和 CTC 组（P<0.05）。补充 CWE 饮食的肉鸡的总胆固醇、低密度脂蛋白胆固醇和尿素氮浓度低于 CON 和 CTC 组（P<0.05）。建议在肉鸡中添加 1000mg/kg 的 CWE，以提高抗氧化状态、胆固醇代谢和生长性能，而不会影响肉鸡的正常肉质。
