饲粮蛋白质水平对蓝狐哺乳性能的影响

Effect of Dietary Protein Levels on Suckling Performance of Blue Foxes(Alopex lagopus)

本试验旨在研究饲粮蛋白质水平对哺乳期母狐哺乳性能的影响。选择健康产仔蓝狐60窝,随机分为4组,每组15个重复,每个重复1窝。各组哺乳母狐分别饲喂蛋白质水平为39.84%(Ⅰ组)、35.69%(Ⅱ组)、32.49%(Ⅲ组)和28.19%(Ⅳ组)的试验饲粮。结果表明:1)10日龄和20日龄仔狐窝重差异不显著(P>0.05),30日龄时Ⅰ组仔狐窝重显著高于Ⅲ组和Ⅳ组(P<0.05),40日龄时Ⅰ组仔狐窝重显著高于Ⅳ组(P<0.05)。2)在仔狐20日龄内,各组仔狐窝平均日增重差异不显著(P>0.05),Ⅰ组仔狐30日龄的窝平均日增重极显著高于Ⅲ组(P<0.01),显著高于Ⅳ组(P<0.05),Ⅰ组仔狐40日龄的窝平均日增重显著高于Ⅳ组(P<0.05)。3)仔狐成活率各个时期Ⅰ组均高于其他各组,并且随着饲粮中蛋白质水平的降低,仔狐的成活率也逐渐下降(P>0.05)。由此可见,在本试验条件下,母狐哺乳期适宜蛋白质水平为39.84%。

This experiment was conducted to study the effect of dietary protein levels on suckling performance of female blue foxes（Alopex lagopus） during lactation.A total of 60 larva healthy blue foxes were randomly allocated to 4 groups with 15 replicates per group and 1 larva fox per replicate.Foxes were fed with 4 experimental diets which contained 39.84%（group Ⅰ）,35.69%（group Ⅱ）,32.49%（group Ⅲ） and 28.19%（group Ⅳ） protein,respectively.The results showed as follows： 1） foxes in different groups had no significant difference in litter weight of larva foxes at 10 and 20 days of age（P0.05）;the litter weight of larva foxes in group Ⅰ at 30 days of age was significantly higher than that in groups Ⅲ and Ⅳ（P0.05）;the litter weight of larva foxes in group Ⅰ at 40 days of age was significantly higher than that in group Ⅳ（P0.05）.2） The litter average weight gain of larva foxes within 20 days of age showed no significant difference in the four groups（P0.05）;the litter average weight gain of larva foxes in group Ⅰ at 30 days of age was significantly higher than that in groups Ⅲ（P0.01） and Ⅳ（P0.05）;the litter average weight gain of larva foxes in group Ⅰ at 40 days of age was significantly higher than that in group Ⅳ（P0.05）.3） The survival rate in different periods in group Ⅰ was higher than that in other groups（P0.05）,and the survival rate in different periods were decreased with the decrease of dietary protein levels（P0.05）.In conclusion,the optimal protein level of female blue foxes during lactation is 39.84% under the conditions of this experiment.