Effect of postbiotics on the production parameters of rearing goose.

Our aim was to measure the mortality, live body weight, feed conversion, intake and detect the weight and stiffness of the liver, liver colour, breast and thigh weight as an effect of the dry form of Burain® postbiotic supplementation in rearing goose. The goslings were allocated into 5 equal groups: control (without supplementation), group 1 (1 g/kg postbiotic during the starter and grower period), group 2 (2 g/kg postbiotic during the starter and grower period), group 3 (0.2 g/kg postbiotic during the starter and grower period), group 4 (1 g/kg postbiotic during the starter period). Granulated feed and drinking water were provided ad libitum to all rearing goose. Supplementation significantly increased body weight in group 2 (6321.84±664.9 g) on week 8. Group 2 showed a significantly reduced feed conversion ratio (1.51±0.04), while groups 1 and 4 exhibited significantly lower daily feed intake than the control during the starter phase. There were no significant differences among groups in foie gras parameters or in thigh and breast weights. The liver weight and stiffness were found to be significantly positively correlated in each treatment group. The supplementation made a significant difference in the parameters of b* and L* for liver colour, but not for a* values. The impact of postbiotic supplementation in the rearing period is extended to weeks. Further investigations are needed to connect information from rearing to the fattening phase and the gut microbiome in goose.