The effects of different fibre sources in pig diets on growth performance, ammonia (NH 3 ), hydrogen sulphide (H 2 S), greenhouse gas (GHG) emissions and slurry characteristics was studied on 20 crossbred pigs [Duroc x F1 (Landrace x Yorkshire)].The experimental diets included one low-fibre (LF) diet without maize distiller's dried grains with solubles (DDGS), brewer's grain (BG) and coconut cake (CC) and 3 high-fibre (HF) diets with maize DDGS or BG or CC.The experiment was conducted according to a completely randomized design with 5 replications and lasted 62 days.In the growing period and the overall, pigs fed diets LF and HF-DDGS had higher average daily gain (ADG) compared to pigs fed diets HF-BG and HF-CC (P < 0.05), wheareas the ADG was lower for pigs fed diets HF-BG and HF-CC than for diet LF (P < 0.05) in the fattening period.There was lower FCR for diets LF and HF-DDGS than for diets HF-BG and HF-CC (P < 0.05) in both periods and overall.In the growing and fattening pigs, diets didn't affect N and P intake, slurry DM content (%) and amount of slurry (kg/head/day), slurry P content (%DM) (P > 0.05), while N and P excretions (g/head/day) were greater for diet HF-CC than for diet LF (P < 0.05).The CO 2 emission was greater for diets HF-BG and HF-CC than for diets LF and HF-DDGS (P < 0.0001) in the growing period, but not for fattening period (P > 0.05).In both periods, CH 4 emission was lower in diet LF than in diet HF-BG and HF-CC (P < 0.05), while NH 3 emission was higher for pigs fed diet LF than pigs fed HF-BG and HF-CC (P < 0.05).The H 2 S emission was not affected by diets in both periods.In conclusion, different fibre sources in pig diets may be a practical method to alter growth performance, slurry characteristics and NH 3 , GHG emissions.