关键词: 腹水综合征, Vc, 肉鸡, 需要量

Abstract: The trial of a 2×3 facto rial arrangements with two dietary T₃ level (0, 1.5 mg/kg) and three Vc levels (0, 500, 1000 mg/kg) was conducted to investigate the effects of dietary Vc on ascites broilers from day 0 to day 21.180 Arbor Acres chicks of 1-d-old were randomly allotted into 6 treatments with three replicates per treatment and 10 birds per replicate. Water and feed were provided ad libitum for 21 days. The results showed:①Dietary T₃ could decrease significantly body weight gain (P<0.01), total antioxidative capacity (T-AOC) in the blood, lung and liver (P<0.05). Dietary T₃ could increase significantly lactic acid (P<0.05), Lactate Dehydrogenase (LDH, P<0.01) and malondialdehyde (MDA, P<0.01) in the blood, increase significantly heart indexes (P<0.01) and the content of Vc (P<0.05) in the lung and hepatic MDA (P<0.01). ②Dietary Vc could improve the healthy status of broilers, but the effect was related with dietary Vc supplementation. Vc in diet could decrease significantly lactic acid (P<0.05), LDH (P<0.01) and MDA (P<0.01) in the blood and hepatic MDA, and increase significantly T-AOC in lung. These results suggested dietary Vc could improve the healthy status of broilers and prevent ascites. 1000 mg/kg Vc was the optimum level in diet.

Key words: ascites, Vc, broiler, requirement