Abstract: 【Objective】 The objective of this study was to investigate the impact of various proportions of whole plant silage maize meal on the growth performance,serum biochemical,antioxidant,and immune indicators of fattening pigs and to determine the optimal proportion of silage corn meal.【Method】 A total of 40 pigs with an average body weight of (39.03±5.53) kg of "Duroc×Landrace×Yorkshire" fattening pigs were selected and randomly divided into 4 groups with 10 pigs in each group.The control group was fed with basic diet (without whole plant silage corn meal),and the test groups were fed with 5% (group Ⅰ),10% (group Ⅱ) and 15% (group Ⅲ) whole plant silage corn meal test diet.The formal test lasted for 90 days.The initial and final body weights of each pig were recorded,along with average daily feed intake.Towards the end of the experiment,3 pigs were randomly selected from each group based on similar body weights,and 10 mL of blood was collected through the anterior vena cava to measure serum biochemical,antioxidant,and immune indicators.【Result】 ① Compared with control group,the feed-to-gain ratio (F/G) of fattening pigs in group Ⅱ was significantly reduced (P＜0.05),while the final body weight (FBW) and the average daily weight gain (ADG) of group Ⅲ were extremely significantly or significantly reduced (P＜0.01 or P＜0.05).② Compared with control group,the levels of serum globulin (GLB) of fattening pigs in group Ⅱ and serum triglycerides (TG) in group Ⅲ were significantly increased (P＜0.05),while the levels of serum aspartate aminotransferase (AST) in groups Ⅰ and Ⅱ were significantly reduced (P＜0.05).③Compared with the control group,the activity of serum superoxide dismutase (SOD) of fattening pigs in groups Ⅱ and Ⅲ were extremely significantly increased (P＜0.01),while the activities of the serum total antioxidant capacity (T-AOC) and glutathione peroxidase (GSH-Px) in groups Ⅰ and Ⅱ were extremely significantly increased (P＜0.01).The contents of serum malondialdehyde (MDA) in groups Ⅰ,Ⅱ and Ⅲ were significantly reduced (P＜0.01).④Compared with the control group,the serum IgG and IgM levels of fattening pigs in group Ⅱ were significantly increased (P＜0.05).The serum IL-1β content in group Ⅱ was significantly or extremely significantly reduced compared to control group and groups Ⅰ and Ⅲ (P＜0.05 or P＜0.01).【Conclusion】 Adding 10% whole plant silage corn meal to the diet could reduce F/G of fattening pigs,improve their antioxidant capacity and immunity.

Key words: whole plant silage maize mael; fattening pigs; growth performance; serum biochemistry indicators; antioxidant indicators; immune indicators