不同硒源对雌性水貂繁殖性能及其后代生长性能的影响

Effects of Different Selenium Sources on Reproductive Performance of Female Minks and Growth Performance of Their Offspring

本试验旨在研究饲粮中添加不同硒源对雌性水貂繁殖性能及其后代生长性能的影响。选取80只配种期初产母貂,随机分成4组,每组20个重复,每个重复1只。对照组(CN组)饲喂基础饲粮(硒含量0.18 mg/kg),试验组分别在基础饲粮中添加0.2 mg/kg(以硒计)亚硒酸钠(SS组)、酵母硒(SY组)、硒代蛋氨酸(Se-Met组)。试验期130 d。结果表明:1)Se-Met组和SY组仔貂21日龄体重显著高于CN组(P<0.05),Se-Met组和SY组仔貂42日龄体重显著高于CN组和SS组(P<0.05)。各组之间母貂窝产仔数及仔貂初生窝重、初生体重、7日龄体重、35日龄体重无显著差异(P>0.05)。2)SY组母貂血清谷胱甘肽过氧化物酶(GSH-Px)活性显著高于CN组和SS组(P<0.05),Se-Met组母貂血清活性氧(ROS)含量极显著低于CN组和SS组(P<0.01)。各组之间母貂血清总超氧化物歧化酶(T-SOD)活性及硒、丙二醛(MDA)含量无显著差异(P>0.05)。3)SY组和Se-Met组仔貂血清硒含量显著高于CN组和SS组(P<0.05),SY组和Se-Met组仔貂血清GSH-Px活性显著高于CN组(P<0.05)。各组之间仔貂血清T-SOD活性及MDA、ROS含量无显著差异(P>0.05)。4)各组之间仔貂血清三碘甲腺原氨酸(T 3)、甲状腺素(T 4)、生长激素(GH)和胰岛素样生长因子-1(IGF-1)含量差异不显著(P>0.05)。综上所述,饲粮中添加不同硒源对母貂繁殖性能无显著影响;与亚硒酸钠相比,饲粮中添加酵母硒或硒代蛋氨酸可提高母貂及其后代抗氧化能力,促进21~42日龄仔貂生长。

This experiment was conducted to study the effects of dietary different selenium sources on reproductive performance of female minks and growth performance of their offspring.Eighty primiparous minks during copulation period were randomly divided into 4 groups with 20 replicates per group and 1 mink per replicate.Minks in the control group(CN group)were fed a basal diet(selenium content was 0.18 mg/kg),and others in experimental groups were fed the basal diets supplemented with 0.2 mg/kg(as selenium)sodium selenite(SS group),selenium yeast(SY group)and selenomethionine(Se-Met group),respectively.The experiment lasted for 130 days.The results showed as follows:1)the body weight at 21 days of age of baby minks in Se-Met group and SY group was significantly higher than that in CN group(P<0.05),and the body weight at 42 days of age of baby minks in Se-Met group and SY group was significantly higher than that in CN group and SS group(P<0.05).There were no significant differences in litter size of female minks and litter weight,birth weight,body weight at 7 days of age and body weight at 35 days of age of baby minks among all groups(P>0.05).2)The serum glutathione peroxidase(GSH-Px)activity of female minks in SY group was significantly higher than that in CN group and SS group(P<0.05),and the serum reactive oxygen(ROS)content of female minks in Se-Met group was significantly lower than that in CN group and SS group(P<0.01).There were no significant differences in serum total superoxide dismutase(T-SOD)activity and selenium,malondialdehyde(MDA)contents of female minks among all groups(P>0.05).3)The serum selenium content of baby minks in SY group and SE-Met group was significantly higher than that in CN group and SS group(P<0.05),and the serum GSH-Px activity of baby minks in SY group and SE-Met group was significantly higher than that in CN group(P<0.05).There were no significant differences in serum T-SOD activity and MDA,ROS contents of baby minks among all groups(P>0.05).4)There were no significant differences in contents of triiodothyronine(T 3),thyroxine(T 4),growth hormone(GH)and insulin-like growth factor-1(IGF-1)in serum of baby minks among all groups(P>0.05).In conclusion,dietary different selenium sources have no significant effect on reproductive performance of female minks;compared with sodium selenite,dietary adding selenium yeast and selenomethionine can increase the antioxidant capacity of female minks and their offspring,and promote the growth of baby minks aged from 21 to 42 days.