According to 2 X 4 factorial design, 120 broilers were treated with CTC therapeutic dosage (500 mg/kg) and the same numbers of broilers were used as control.
英
美
- 试验采用2×4二因子试验设计方案,即对一半试鸡进行三天(15-17日龄)金霉素治疗剂量(500mg/kg)前处理,另一半试鸡不进行处理;