2.1 Experimental design and feeding management
A total of 27 Bamei pigs with similar weights (21 kg ± 0.15 kg) and good
levels of health were selected and randomly divided into three
treatments at the Gansu Provincial Farming and Animal Husbandry Breeding
Farm, Jingtai County, Gansu Province, China. Three replicates per
treatment were carried out with three pigs per replicate (Table 1). The
test period used spanned June 24, 2019, to November 20, 2019,
encompassing a pre-trial period of seven days and a normal trial period
of 150 days. The pig house was thoroughly cleaned before the test and
disinfected. Throughout the test period, pigs were immunized at the
times specified by the farm and were able to freely drink water and eat.
The management conditions for each group were the same; disinfection was
carried out every Friday and the pig house was cleaned at 09:00 and
16:00 each day.
Table 1 Dietary protein level