The effect of dietary supplementation of Crassocephalum crepidioides leaf powder (CCLP) in comparison with oxytetracycline and butylated hydroxyanisole (BHA) on growth, caecal microbiota, immune status, blood chemistry, carcass traits, meat quality, and oxidative stability in broiler chickens was evaluated. Two hundred and eighty 1-day-old Arbor acre chicks were randomly assigned to a basal diet containing either no additive (control, CON), 400 ppm oxytetracycline + 150 ppm BHA (ANTIBIOX), 1000 ppm CCLP (CCLP-1), or 2000 ppm CCLP (CCLP-2) for 42 days. Each dietary group had seven replicates with ten birds per replicate. Supplemented birds had higher (P < 0.05) feed efficiency, hemoglobin, and hematocrit compared with the CON birds. Diet did not affect feed intake, body weight gain, splenic interleukin-1β, interleukin-6, interleukin-10, and serum IgM. The CCLP-2 birds had lower (P < 0.05) serum total and LDL cholesterol than did birds fed other treatments. Salmonella spp. and Escherichia coli counts and serum IgG were higher in the CON birds than in the supplemented birds. The ANTIBIOX birds had lower (P < 0.05) Lactobacillus spp. count, and higher (P < 0.05) E. coli count compared with the CCLP-supplemented birds. Carcass, muscle pH, and cook loss were not affected by diet. The CON breast meat had higher drip loss and lower redness than did the breast meat of the supplemented birds. Carbonyl content and TBARS value in the thigh and breast meat of the supplemented birds were lower (P < 0.05) than those of the CON birds. These results infer that CCLP exhibited antioxidant and antimicrobial properties that were comparable to those of BHA and oxytetracycline in the diet of broiler chickens.

评估了日粮Crssocephalum crepidioides叶粉（CCLP）与土霉素，丁基化羟基茴香醚（BHA）相比对肉仔鸡生长，盲肠微生物群，免疫状态，血液化学，car体性状，肉质和氧化稳定性的影响。将280只1天大的Arbor英亩小鸡随机分配到不添加添加剂（对照，CON），400 ppm土霉素+ 150 ppm BHA（ANTIBIOX），1000 ppm CCLP（CCLP-1）或2000 ppm CCLP（CCLP-2），持续42天。每个饮食组有七个重复，每个重复十只鸟。补充鸟具有更高的（P <0.05）与CON禽相比饲料效率，血红蛋白和血细胞比容。饮食不影响饲料摄入，体重增加，脾脏白细胞介素-1β，白细胞介素-6，白细胞介素10和血清IgM。CCLP-2禽类的 总血清和LDL胆固醇水平低于（P <0.05）禽类，但饲喂其他方法的禽类则更低。沙门氏菌属。和大肠杆菌计数和血清IgG分别在CON鸟比在补充鸟更高。ANTIBIOX禽类的乳杆菌属菌种较低（P  <0.05）。数量及更高（P  <0.05）大肠杆菌计数与CCLP补充的鸟类相比。diet体，肌肉酸碱度和蒸煮损失不受饮食影响。与补充鸟类的胸肉相比，CON胸肉具有更高的滴水损失和更低的发红度。补充禽类的大腿和胸肉中的羰基含量和TBARS值均低于 CON禽类（P <0.05）。这些结果表明，CCLP在肉鸡的日粮中具有与BHA和土霉素相当的抗氧化和抗菌性能。