Substitution of soybean meal with extruded rapeseed meal improves growth performance, slaughter performance and digestive function in Langshan chickens

< 0.05).4. Feeding the 10% RSM diets negatively affected slaughter yields, whereas both 10% ERSM and 20% ERSM treatments improved growth performance, slaughter performance and digestive function in Langshan chickens aged 51 d.