碘对1~4周龄五龙鹅生长性能、屠宰性能和血清抗氧化指标的影响

Effects of Iodine on Growth Performance,Slaughter Performance and Serum Antioxidation Indicators of Wulong Geese Aged from 1 to 4 Weeks

本试验旨在研究饲粮碘添加水平对1-4周龄五龙鹅生长性能、屠宰性能和血清抗氧化指标的影响,以确定五龙鹅饲粮中碘的适宜添加水平。试验选用1日龄五龙鹅216只,随机分为6个组,每组3个重复,每个重复12只。Ⅰ组（对照组）饲喂基础饲粮,Ⅱ-Ⅵ组分别饲喂在基础饲粮中添加0.2、0.4、0.8、1.6、3.2 mg/kg碘的试验饲粮。试验期为4周。结果表明：1）与对照组相比,饲粮添加0.4 mg/kg碘能显著提高鹅的平均日增重和平均日采食量（P〈0.05）,显著降低料重比（P〈0.05）。2）与对照组相比,饲粮添加0.4 mg/kg碘极显著提高了半净膛率、全净膛率、胸肌率（P〈0.01）,显著提高了屠宰率、腿肌率（P〈0.05）。3）与对照组相比,饲粮添加0.4 mg/kg碘极显著提高了血清总抗氧化能力及总超氧化物歧化酶活性（P〈0.01）,显著提高了血清过氧化氢酶、谷胱甘肽过氧化物酶活性（P〈0.05）,显著降低了血清丙二醛含量（P〈0.05）。由此可见,本试验条件下,饲粮中添加适宜水平的碘对1-4周龄五龙鹅生长性能、屠宰性能和血清抗氧化指标有显著影响。五龙鹅饲粮中碘的适宜添加水平为0.4 mg/kg。

This experiment was conducted to study the effects of dietary iodine supplemental level on growth performance,slaughter performance and serum antioxidation indicators of Wulong geese aged from 1 to 4weeks,and to find the optimal supplemental level of the iodine.A total of 216 one-day-old Wulong geese were randomly divided into 6 groups with 3 replicates per group,and 12 geese in each replicate.Geese in group I（control group） were fed a basal diet,and the others in the experimental groups（groups Ⅱ to Ⅵ） were fed experimental diets supplemented with 0.2,0.4,0.8,1.6 and 3.2 mg/kg iodine,respectively.The experiment lasted for 4 weeks.The results showed as follows：1） compared with the control group,dietary supplemented0.4 mg/kg iodine significantly increased the average daily gain and average daily feed intake（P〈0.05）,and significantly reduced the feed to gain（P〈0.05）.2） Compared with the control group,dietary supplemented0.4 mg/kg iodine significantly increased the percentage of half-eviscerated weight,percentage of eviscerated weight and percentage of breast muscle（P〈0.01）,and significantly increased dressing percentage and percentage of leg muscle（P〈0.05）.3） Compared with the control group,dietary supplemented 0.4 mg/kg iodine significantly increased the total antioxidant capacity and activity of total superoxide dismutase in serum（P〈0.01）,significantly increased the activities of catalase and glutathione peroxidase in serum（P〈0.05）,and significantly reduced the serum malonaldehyde content（P〈0.05）.In conclusion,under this experiment condition,dietary supplemented appropriate iodine level can significantly affect the growth performance,slaughter performance and serum antioxidation indicators of Wulong geese aged from 1 to 4 weeks,and the optimal supplemental level of iodine is 0.4 mg/kg.