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摘要
This experiment was conducted to investigate the effects of combination of glucose oxidase (GOD) and catalase (CAT) on growth performance, nutrient digestibility, serum indices and intestinal morphology of broilers. A total of 600 one-day-old healthy Ross 308 white feather broilers were randomly assigned to 6 groups with 10 replicates in each group and 10 broilers in each replicate (half male and half female). Broilers in the control group were fed a basal diet, and others in experimental groups were fed basal diets supplemented with 250 g/t GOD, 250 g/t CAT, 250 g/t GOD+125 g/t CAT, 250 g/t GOD+250 g/t CAT and 250 g/t GOD+ 500 g/t CAT, respectively. The experiment was divided into two stages: 1 to 21 days of age and 22 to 42 days of age, and the experiment lasted for 42 days. The results showed as follows: 1) during 1 to 21 days of age, compared with the control group, the body weight at 21 days of age and average daily gain of 250 g/t GOD+ 250 g/t CAT group were significantly increased (P<0.05) , and the feed to gain was significantly decreased (P<0.05). 2) Compared with the control group, the ether extract digestibility during 1 to 21 days of age of 250 g/t GOD+250 g/t CAT group was significantly increased (P<0.05) , and the digestibility of dry matter, crude protein and gross energy was increased by 1.94% , 1.47% and 2.37% , respectively (P>0.05). 3) Compared with the control group, the serum albumin content at 21 days of age of 250 g/t GOD group was significantly increased (P<0.05) , the serum immunoglobulin G content of 250 g/t CAT group was significantly increased (P<0.05) , and the serum immunoglobulin A content of 250 g/t GOD + 125 g/t CAT group was significantly increased (P<0.05). 4) Compared with the control group, the serum superoxide dismutase activity at 21 days of age of 250 g/t CAT group was significantly decreased (P<0.05) , and the serum malondialde-hyde content of 250 g/t GOD+125 g/t CAT group was significantly increased (P<0.05). 5) Compared with the control group, the ileal crypt depth at 21 days of age of 250 g/t GOD+125 g/t CAT group and 250 g/t GOD+250 g/t CAT group was significantly decreased (P<0.05). In conclusion, dietary addition of 250 g/t GOD+250 g/t CAT can improve growth performance and nutrient digestibility of broilers during 1 to 21 days of age, and addition of 250 g/t GOD+125 g/t CAT and 250 g/t GOD+250 g/t CAT can promote the intestinal development of broilers. ? 2023 Chinese Journal of Animal Science and Veterinary Medicine Co., Ltd..
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