本试验旨在研究饲粮碘添加水平对3~5月龄生长獭兔生长性能、屠宰性能、肌肉品质和皮张质量的影响。选用体重相近的健康3月龄獭兔200只，随机分为5组，每组40个重复，每个重复1只。各组分别饲喂在基础饲粮中添加0、0.2、0.4、0.8、1.6 mg/kg碘（以碘化钾的形式）的试验饲粮。预试期7 d，正试期53 d。结果表明：1）在初始体重（IBW）无显著差异（P>0.05）的前提下，饲粮碘添加水平对獭兔的终末体重（FBW）有显著影响（P<0.05），对平均日采食量（ADFI）有极显著影响（P<0.01），对平均日增重（ADG）和料重比（F/G）均没有显著影响（P>0.05）；0.8 mg/kg组獭兔的ADG和ADFI最高，F/G最低。2）饲粮碘添加水平对獭兔的后腿肌肉率和红度值有显著影响（P<0.05），对前腿肌肉率有极显著影响（P<0.01），对全净膛率、背腰肌肉率和肌肉品质指标[pH、失水率以及肉色（亮度、黄度值）]均没有显著影响（P>0.05）。3）饲粮碘添加水平对獭兔的皮张面积、毛被白度和撕裂强度有极显著影响（P<0.01），且最大值分别在0.8、0.4和0.4 mg/kg组。饲粮碘添加水平对獭兔的皮张重量和皮板厚度有显著影响（P<0.05），对毛囊密度、毛被光泽度、毛被长度、撕裂断点厚度、抗张强度及规定负荷伸长率均没有显著影响（P>0.05）。综合本试验测定指标，3~5月龄生长獭兔饲粮适宜的碘添加水平为0.8 mg/kg （饲粮中碘含量的实测值为0.92 mg/kg）。

This experiment was conducted to investigate the effects of dietary iodine supplemental level on growth performance, slaughter performance, meat quality and fur quality of 3 to 5-month-old growing Rex rabbits. Two hundred 3-month-old healthy Rex rabbits with similar body weight were randomly divided into 5 groups with 40 replicates in each group and 1 rabbit in each replicate. Rabbits in 5 groups were fed basal diets supplemented with 0, 0.2, 0.4, 0.8 and 1.6 mg/kg iodine (in the form of potash iodide), respectively. The adaptation period lasted for 7 days and the formal period lasted for 53 days. The results showed as follows:1) under the condition of there was no significant difference on initial body weight (IBW), dietary iodine supplemental level had significant influence on final body weight (FBW) of Rex rabbits (P<0.05), and had extremely significant influence on average daily feed intake (ADFI) of Rex rabbits (P<0.01), and had no significant influence on average daily gain (ADG) and feed/gain (F/G) of Rex rabbits (P>0.05); the highest ADG and ADFI was in 0.8 mg/kg group, and the lowest F/G was in 0.8 mg/kg group. 2) Dietary iodine supplemental level had significant influences on hind leg muscle ratio and redness value of Rex rabbits (P<0.05), and had extremely significant influence on fore leg muscle ratio (P<0.01), but had no significant influence on eviscerated ratio, back lumbar muscle ratio and meat quality indices including pH, drip loss ratio and meat color (lightness and yellowness values) (P>0.05). 3) Dietary iodine supplemental level had extremely significant influence on fur area, fur whiteness and tear strength of Rex rabbits (P<0.01), and the highest values were at 0.8, 0.4 and 0.4 mg/kg group, respectively. Dietary iodine supplemental level had significant influence on fur weight and fur thickness of Rex rabbits (P<0.05), but had no significant influence on hair follicle density, fur glossiness, fur length, tearing break point thickness, tensile strength and stretched ratio (P>0.05). Considering all indexes of this experiment, the appropriate iodine supplemental level is 0.8 mg/kg for 3 to 5-month-old Rex rabbits (the measured value of diet iodine content is 0.92 mg/kg).