摘要
选用12头18月龄,体况良好,体重380 kg的西门塔尔牛育成母牛,采用完全随机区组设计分为4组,研究亚硒酸钠(0、0.3、0.6和0.9 mg Se/kg DM)对发情周期外周血清促黄体素、促卵泡素、孕酮和雌二醇分泌的影响。结果表明:日粮添加亚硒酸钠后发情周期促黄体素、促卵泡素、孕酮和雌二醇分泌水平提高,0.3 mg/kg组和0.6 mg/kg组显著高于对照组(P<0.05),0.3 mg/kg组较0.6 mg/kg组高(P>0.05)。根据试验结果推断以亚硒酸钠为硒源,添加0.3 mg Se/kg DM对发情周期生殖激素分泌有显著促进作用,兼顾基础日粮的含硒量,建议日粮硒水平为0.37 mg Se/kg DM。
Twelve Simmental heifers （ average BW 380 kg, aged 1.5） consuming a corn straw diet were chosen and allocated into four treatments and supplemented with four levels （0, 0.3,0.6 and 0.9 mg Se/kg of DM） of supplemental sodium selenite to evaluate the effects of selenium on reproductive hormone excretion during the oestrous cycle. The resuits showed that serum estradiol, luteinizing-hormone, follicle-stimulating hormone and progesterone concentrations were increased significantly （P 〈 0.05 ） by supplemental sodium selenite at 0.3 mg Se/kg of DM than control group. Serum estradiol, estriol, luteinizing-hormone, follicle-stimulating hormone and progesterone concentrations were increased by supplemental selenium of different selenium sources at 0.9 mg Se/kg of DM, but no significant difference with control （P 〉 0.05 ）. This indicated that selenium＇sources had positive effects on reproductive hormone during estrus cycle by supplemental selenium at 0.3 mg Se/kg of DM.
出处
《激光生物学报》
CAS
CSCD
2007年第3期279-285,共7页
Acta Laser Biology Sinica
基金
国家科技成果转化项目(02EFN211401036)
关键词
西门塔尔牛
亚硒酸钠
发情周期
生殖激素
sodium selenite
estrous cycle
reproductive hormone
Simmental heifer
