本试验旨在研究饲粮中不同锰水平对1~4周龄五龙鹅血清脂类代谢、抗氧化指标及器官组织中锰沉积量的影响,以确定鹅饲粮中锰适宜添加水平.试验选用1日龄体重相近的五龙鹅360只,随机分为6个组,每组6个重复,每个重复10只鹅(公母各占1/2).对照组(Ⅰ组)饲喂基础饲粮(锰含量为20 mg/kg),试验组分别饲喂在基础饲粮中添加30(Ⅱ组)、60(Ⅲ组)、90(Ⅳ组)、120(Ⅴ组)和150 mg/kg锰的试验饲粮(Ⅵ组).试验期4周.结果表明:1)Ⅳ、Ⅴ、Ⅵ组血清甘油三酯和总胆固醇含量极显著高于Ⅰ组(P<0.01),Ⅲ组显著高于Ⅰ组(P<0.05).各组血清碱性磷酸酶活性差异不显著(P>0.05).2)Ⅳ、Ⅴ、Ⅵ组血清总抗氧化能力和谷胱甘肽过氧化物酶活性极显著高于Ⅰ组(P<0.01),Ⅲ组显著高于Ⅰ组(P<0.05);Ⅴ组血清丙二醛含量极显著低于Ⅰ、Ⅱ、Ⅲ组(P<0.01),Ⅳ、Ⅵ组显著低于Ⅰ、Ⅱ、Ⅲ组(P<0.05).3)Ⅳ、Ⅴ、Ⅵ组血清、心脏、肝脏和胰脏中锰沉积量极显著高于Ⅰ组(P<0.01),Ⅱ、Ⅲ组血清、心脏和肝脏中锰沉积量显著高于Ⅰ组(P<0.05).由此可见,饲粮中添加锰能提高五龙鹅血清甘油三酯、总胆固醇含量,增强机体抗氧化能力,增加器官组织中锰沉积量.建议鹅饲粮中锰适宜添加水平为90~120 mg/kg.%This experiment was conducted to study the effects of dietary different manganese levels on serum lipid metabolism, antioxidant indices and organ tissue manganese deposition of Wulong geese aged from 1 to 4 weeks, and to find the appropriate dietary manganese supplemental level. Three hundred and sixty one?day?old Wulong geese were randomly divided into 6 groups with 6 replicates per group and 10 geese per replicate ( half male and half female ) . Geese in the control group ( group Ⅰ) were fed a basal diet ( manganese content 20 mg/kg) , and the others in the experimental groups were fed the basal diets supplemented with 30 ( groupⅡ) , 60 ( groupⅢ) , 90 ( groupⅣ) , 120 ( groupⅤ) and 150 mg/kg ( groupⅥ) manganese, respectively. The experiment lasted for 4 weeks. The results showed as follows:1) the contents of triglyceride and total cho?lesterol in serum of groups Ⅳ, Ⅴ and Ⅵ were extremely significantly higher than those of group Ⅰ ( P<0.01), and the contents of triglyceride and total cholesterol in serum of groupⅢwere significantly higher than those of group Ⅰ ( P<0.05) . There was no significant different on serum alkaline phosphatase activity among all groups ( P>0.05) . 2) The serum total antioxidant capacity and glutathione peroxidase activity of groupsⅣ,Ⅴ and Ⅵ were extremely significantly higher than those of group Ⅰ ( P<0.01) , and the serum total antioxi?dant capacity and glutathione peroxidase activity of group Ⅲ were significantly higher than those of group Ⅰ(P<0.05). The serum malondialdehyde content of group Ⅴ was extremely significantly higher than that of groups Ⅰ,ⅡandⅢ( P<0.01) , and the serum malondialdehyde content of groupsⅣandⅥwas significant?ly higher than that of groups Ⅰ, Ⅱ and Ⅲ ( P<0.05) . 3) The manganese depositions in serum, heart, liver and pancreas of groups Ⅳ, Ⅴ and Ⅵ were extremely significantly higher than those of group Ⅰ ( P<0.01) , and the manganese depositions in serum, heart and liver of groups Ⅱ and Ⅲ were significantly higher than those of groupⅠ( P<0.05) . In conclusion, dietary supplemented with manganese can improve the contents of triglyceride and total cholesterol in serum, enhance the body antioxidant capacity, and increase the organ tissue manganese deposition of Wulong geese. It is suggested that the suitable manganese supplemental level is 90 to 120 mg/kg.
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