环境温度和维生素A对育成期笼养公鸭睾丸发育及相关激素的影响  

Effects of Environmental Temperature and Vitamin A on Testicular Development and Relative Hormones of Rearing Drake in Cage

作　　者：接永泽[1] 王安[1] 

机构地区：[1]东北农业大学动物营养研究所,哈尔滨150030

出　　处：《动物营养学报》2009年第6期829-833,共5页CHINESE JOURNAL OF ANIMAL NUTRITION

基　　金：国家自然科学基金项目(30571345)

摘　　要：本试验旨在研究环境温度和维生素A(VA)对育成期(12～17周龄)笼养公鸭睾丸发育及相关激素的影响。选取12周龄金定公鸭144只,采用2×3两因素交互试验设计,随机分配到适宜舍温[(18±1)℃]和较低舍温[(2±1)℃]下的3个VA水平组(4 000、10 000和15 000 IU/kg)中,每组6个重复,每个重复4只试鸭。结果表明:(1)环境温度对三碘甲腺原氨酸(T_3)和甲状腺素(T_4)影响极显著(P<0.01),对胰岛素影响不显著(P>0.05);VA水平对T_3影响不显著(P>0.05),对T_4影响极显著(P<0.01),对胰岛素影响不显著(P>0.05);环境温度和VA水平对胰岛素有交互作用(P<0.05);(2)环境温度对血清促卵泡生成激素(FSH)影响显著(P<0.05),对血清促黄体生成激素(LH)和血清睾酮(T)影响极显著(P<0.01),VA水平对FSH和T影响不显著(P>0.05),对LH影响显著(P<0.05);(3)环境温度对睾丸相对重量和睾丸相对长度影响显著(P<0.05);VA水平对睾丸相对重量和相对长度影响均不显著(P>0 05)。本试验条件下,15 000 IU/kg的VA能有效地调节较低舍温对激素水平产生的影响,使其与正常生理水平相接近,10 000 IU/kg的VA能降低较低舍温对睾丸发育造成的不利影响。This experiment was conducted to study the effects of environmental temperature and vitamin A on testicular development and relative hormones of rearing drake （12-17 weeks） in cage. A 2 × 3 factorial arrangement of treatment was employed with 2 temperature levels （suitable indoor temperature （18 ± 1）℃ and lower indoor temperature （2 ± 1） ℃ ） and 3 vitamin A levels （4 000, 10 000 and 15 000 IU/kg） . One hundred and forty-four drakes were randomly allotted into 6 groups and each group contained 6 replicates with 4 drakes. The results showed as follows： 1） environmental temperature significantly affected triiodothyronine （T3） and thyroxine （T4） （P〈0.01） but had not significant influenceon insulin （P〉0.05）. The T4 level was significantly affected by vitamin A levels （P〈0.01） ; however, T3 and insulin were not significantly affected by vitamin A levels （P〉0.05）. There was significant effect of interaction of environmental temperature and vitamin A levels on insulin level （P〈0.05） ; 2） follicle stimulating hormone （FSH） （P〈0.05）, luteinzing hormone （LH） （P〈0.01） and testosterone （T） in serum （P〈0.01） were significantly influenced by environmental temperature. Vitamin A levels significantly affected LH level （P〈0.05）, but had not significantly influenced on the level of FSH and T （P〉0.05） ; 3） testicular relative weight and testicular relative length were significantly influenced by environmental temperature （P〈0.05）, however, vitamin A levels did not influence testicular relative weight and testicular relative length （P〉0.05）. In conclusion, it would appear from the results of the present study that 15 000 IU/kg vitamin A could efficiently regulate the thyroid hormone levels which were influenced by lower indoor temperature, and make them closed to normal physiology standard; and the 10 000 IU/kg vitamin A could reduce the adverse effects of lower indoor temperature on testicular development of

关 键 词：环境温度 VA 笼养公鸭 三碘甲腺原氨酸 甲状腺素 胰岛素 性激素 

分 类 号：S896.4[农业科学—特种经济动物饲养] Q45[农业科学—畜牧兽医]