Effect of bact-a-cid supplementing in feed for evil chicken raising from 0 to 4 weeks old

Abstract

A study “Effect of bact-a-cid supplementing in feed for evil chicken raising from 0 to 4 weeks old”
was conducted on 12,000 broilers. These chicken were divided into three experimental groups and one
control group. The chickens in the experimental group No.1, No.2 and No.3 were feeded with the feed
adding bact-a-cid with 3 levels: 1.5kg, 2.5 kg, 3.5 kg/1 ton of feed, respectively. The chickens in control
group were fed with feed without adding bact-a-cid. The experimental results showed that the average
pH level in intestinal tract and feces of the chikens in the experimental group No.2 was 6.68 ± 0.40,
lower than that of the chickens in other experimental groups, and it was significantly different compared
to that of the chickens in control group (P<0.05). The Escherichia coli concentrations in intestinal tract
and feces of the chickens in the experimental and control groups decreased gradually from one week
old to four weeks old. The E. coli concentration in intestines and feces of chickens in the experimental
group No.2 was lowest (1.18±0.58x106
CFU/g ± SD, log = 6.02±0.27). Salmonella spp. and Clostridium
perfingens were not found in the chickens in all experimental and control groups. The average weight
gain of chickens in the experimental group No.2 was highest, meanwhile FCR was lowest.