The effects of chitosan supplementation on the performance of weaned pigs are shown in Table 2. Quadratic improving effect of chitosan supplementation on ADG was observed during the first 14 days (P < 0.05) and the last 14 days (P < 0.05) after weaning.
The ADG during the entire experimental period was also improved quadratically (P < 0.01) with increasing chitosan inclusion,
and the pigs fed the diet containing 500 mg/kg chitosan had the highest ADG among treatments.
However,
no significant linear or quadratic effect was observed for the ADFI or G : F ratio in response to increased chitosan supplementation during the entire experimental period.