选用9周龄初始体重无显著差异(P＞0.05)的泰和乌骨鸡180只(公母各半),随机分成6组,分别饲喂在基础日粮中添加0(对照组)、0.1、0.3、0.5、0.7、0.9 mg/kg硒的试验日粮,每组设3个重复,每个重复10只鸡.试验期为4周.结果表明,日增重随日粮硒添加水平的提高呈先升高后下降趋势,0.3 mg/kg和0.5 mg/kg水平添加组显著高于对照组(P＜0.05).料重比随硒添加水平的提高呈先下降后升高趋势,0.3mg/kg硒添加水平能显著降低料重比(P＜0.05),不同硒添加水平组相比差异不显著(P＞0.05).肝脏、肾脏、胸肌和皮肤黑色素含量随硒添加水平的提高呈先上升后下降的趋势.其中,当日粮硒添加水平为0.5mg/kg时,肝脏和胸肌黑色素含量达到峰值；当日粮硒添加水平为0.3mg/kg时,肾脏和皮肤黑色素含量达到峰值.%180 9-week-old Taihe silky fowls were randomly allotted to 6 groups with 3 replicates of 10 fowls each and were raised to 13 weeks of age. The birds were fed one of the following diets: Corn-soybean meal basal diet, basal diet supplemented with 0, 0.1, 0.3, 0.5, 0.7 and 0.9 mg/kg Se from sodium selenite. The results showed that average daily gain (ADG) tended to increase at first and then decrease, dietary supplementation of 0.3 and 0.5 mg/kg Se significantly increased ADG (P<0.05). On the contrary, the feed to gain ratio (F/G) tended to decreased firstly and then increased and the F/G was significantly decreased by supplementation of 0.3 mg/kg Se (P<0.05), there was no significant difference between each group with different addition level of Se (P>0.05). Melanin contents in live, kidney, pectoral muscle and skin tended to increase at first and then decreased with Se supplementation level increasing. The melanin contents in liver and pectoral muscle reached peak value when the dietary Se supplementation level was 0.5 mg/kg, and the melanin contents in kidney and skin reached peak value at 0.3 mg/kg of Se supplementation level.
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