本试验旨在研究饲粮锌水平对冬毛期蓝狐生长性能、营养物质消化率、氮代谢及毛皮质量的影响，以确定冬毛期蓝狐饲粮中适宜锌水平。选取16周龄左右、平均体重为（5.80±0.60） kg的健康蓝狐90只，随机分成5组，每组18只，公母各占1/2。各组蓝狐分别饲喂饲粮锌水平为41.25（Ⅰ组）、60.00（Ⅱ组）、80.00（Ⅲ组）、100.00（Ⅳ组）、120.00 mg/kg（Ⅴ组）的试验饲粮。预试期7 d，正试期60 d。结果表明：1）Ⅲ组公狐末重显著高于Ⅰ组和Ⅱ组（P<0.05）；公狐与母狐平均日增重各组间差异不显著（P>0.05）。2）公狐和母狐干物质排出量、干物质消化率和蛋白质消化率各组间差异不显著（P>0.05）；Ⅴ组公狐脂肪消化率显著高于Ⅰ组（P<0.05）。3）公狐食入氮、粪氮、尿氮、氮沉积、净蛋白质利用率和蛋白质生物学价值各组间差异不显著（P>0.05）；Ⅰ组母狐粪氮显著高于Ⅲ组（P<0.05），Ⅲ组、Ⅳ组和Ⅴ组母狐氮沉积和净蛋白质利用率极显著高于Ⅰ组（P<0.01），Ⅳ组母狐蛋白质生物学价值显著高于Ⅰ组（P<0.05）。4）公狐体长、针毛长、绒毛长和干皮长各组间差异不显著（P>0.05）；Ⅴ组母狐针毛长极显著高于其他各组（P<0.01），Ⅴ组母狐绒毛长显著高于Ⅰ组和Ⅲ组（P<0.05）。综合各项指标，建议冬毛期蓝狐饲粮适宜锌水平为80~120 mg/kg，可满足冬毛期蓝狐的锌营养需要并获得较好的生长性能及毛皮质量。

This experiment was conducted to study the effects of dietary zinc level on growth performance, nutrient digestibility, nitrogen metabolism and fur quality of blue foxes during the growing-furring period, and to find the appropriate dietary zinc level for the blue foxes. Ninety 16-week-old healthy blue foxes with the average body weight of (5.80±0.60) kg were randomly divided into 5 groups with 18 foxes per group, each group had 9 male foxes and 9 female foxes. The blue foxes were fed the experimental diets with dietary zinc levels of 41.25 (group Ⅰ), 60.00 (group Ⅱ), 80.00 (group Ⅲ), 100.00 (group Ⅳ) and 120.00 mg/kg (group Ⅴ), respectively. The pretest period lasted for 7 days and the test period lasted for 60 days. The results showed as follows: 1) the final weight of male foxes in group Ⅲ was significantly higher than that in groups Ⅰ and Ⅱ (P<0.05); there was no significant difference in the average daily gain of male foxes and female foxes among all groups (P>0.05). 2) There was no significant difference in dry matter output, dry matter digestibility and protein digestibility of male foxes and female foxes among all groups (P>0.05); the fat digestibility of male foxes in group Ⅴ was significantly higher than that in group Ⅰ (P<0.05). 3) There was no significant difference in nitrogen intake, fecal nitrogen, urinary nitrogen, nitrogen deposition, net protein utilization and biological value of protein of male foxes among all groups (P>0.05). The fecal nitrogen of female foxes in group Ⅰ was significantly higher than that in group Ⅲ (P<0.05); the nitrogen deposition and net protein utilization of female foxes in groups Ⅲ, Ⅳ and Ⅴ were significantly higher than those in group Ⅰ (P<0.01); the biological value of protein of female foxes in group Ⅳ was significantly higher than that in group Ⅰ (P<0.05). 4) There was no significant difference in body length, guard fur length, under fur length and dry fur length of male foxes among all groups (P>0.05). The guard fur length of female foxes in group Ⅴ was significantly higher than that in other groups (P<0.01); the under fur length of female foxes in group Ⅴ was significantly higher than that in groups Ⅰ and Ⅲ (P<0.05). In conclusion, the appropriate dietary zinc level for blue foxes during the growing-furring period is 80 to 120 mg/kg, which can be possible to meet the requirement for blue foxes and have better growth performance and fur quality.