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Broiler chickens are susceptible to diseases come from bacteria. The bacteria that usually infect broiler chickens is  Escherichia coli  which can cause diarrhea. The precaution is done using antibiotics, usually. This study aimed to analyse the effect of Batak Onion ( Allium  chinense ) extract and powder as an antibiotic to the performance of broiler chicken. Research method was using the completely randomized design (CRD) with 7 treatments and 3 repetitions, and five samples of broiler chicken were used for each repetition. The treatments were P0A: Control without infection, P0B: with  E. coli  infection, P1: P0A + Batak Onion Extract ( A. Chinense ) (1%), P2: P0A + Batak Onion Powder ( A. Chinense ) (0.05%), P3: P0B + Batak Onion Extract ( A. Chinense ) (1%), P4: P0B + Batak Onion Powder ( A. Chinense ) (0.05%) and P5: P0B + Tetracycline Antibiotic (0.05%). Result of the research showed result that were not significantly different for feed consumption, weight gain and feed conversion before infection which was in contrast with after infection condition. It can be concluded that the use of Batak onion extract and powder can be used as a natural antibiotic to replace the tetracyclines.

The utilization of extract and powder of Batak onion (Allium chinense) as an antibiotic to broiler chicken performance