ABSTRACT Phytogenics are being considered a suitable alternative to antibiotics as growth promoters. In the current experiment, five hundred 40-day-old Cobb 500 broiler chickens were randomly allotted to five treatments as follow: control (basal diet only), basal diet + Ajwan powder (10 mg/kg of feed), basal diet + Coriander powder (10 mg/kg of feed), basal diet + black Cumin powder (10 mg/kg of feed), basal diet + protease enzyme (30,000 IU/kg). The results showed that feed intake was significantly (P < 0.05) higher in Coriander and protease treated birds at the end of the starter and finisher phases. On overall basis, body weight was significantly (P < 0.05) higher in protease, black Cumin and Coriander treated birds compared to the control. Feed conversion ratio was significantly (P < 0.05) improved in black Cumin and protease enzyme treated birds compared to the control. The results indicated that muscle fibre diameter, muscle fibre cross sectional area, muscle fascial diameter and muscle fascial cross sectional area were significantly (P < 0.05) higher in protease and black Cumin supplemented birds compared to the control. From the results of the present study, it was concluded that the performance and muscle histology were significantly improved in protease enzyme and phytogenics treated broiler.

中文翻译：

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日粮中添加植物生长素和蛋白酶对肉鸡生产性能、血清生化和肌肉组织形态学的影响

摘要 植物源性被认为是作为生长促进剂的抗生素的合适替代品。在目前的实验中，将 500 只 40 日龄 Cobb 500 肉鸡随机分配到以下五个处理组：对照（仅基础日粮）、基础日粮 + Ajwan 粉（10 mg/kg 饲料）、基础日粮 + 香菜粉（10 mg/kg 饲料）、基础日粮 + 黑孜然粉（10 mg/kg 饲料）、基础日粮 + 蛋白酶（30,000 IU/kg）。结果表明，在开始和育肥阶段结束时，芫荽和蛋白酶处理的鸡只的采食量显着增加（P < 0.05）。总体而言，与对照相比，蛋白酶、黑孜然和香菜处理的鸟类的体重显着增加（P < 0.05）。饲料转化率显着（P < 0. 05) 与对照相比，黑孜然和蛋白酶处理的禽类得到改善。结果表明，与对照相比，蛋白酶和黑孜然补充禽类的肌纤维直径、肌纤维横截面积、肌筋膜直径和肌筋膜横截面积显着（P < 0.05）更高。从本研究的结果可以得出结论，蛋白酶和植物源性物质处理的肉鸡的生产性能和肌肉组织学显着改善。