赛乐硒对西门塔尔母牛发情周期生殖激素分泌的影响

以赛乐硒为硒源,研究了日粮(混合精料+玉米秸秆)添加不同水平硒(0、0.3、0.6和0.9mg/kg)对西门塔尔牛育成母牛发情周期生殖激素分泌的影响。结果表明,赛乐硒提高了母牛发情周期LH、FSH、P4、E2水平,0.3和0.6mg/kg组显著高于0.9mg/kg和对照组,0.9mg/kg组显著高于对照组(P<0.05)。由此推断0.6mg/kg处理对发情周期生殖激素分泌有显著促进作用,兼顾基础日粮含硒量,建议日粮硒水平为0.67mg/kg。

EFFECTS OF SELENIUM PLEX ON SERUM REPRODUCTIVE HORMONE LEVEL DURING ESTROUS CYCLE IN SIMMENTAL HEIFERS

Sixteen Simmental heifers were chosen and allocated into four treatments and supplemented selenium with levels of 0,0.3,0.6 and 0.9mg/kg by selenium plex to evaluate the effects of selenium plex on reproductive hormone excretion during the oestrous cycle.The results showed that serum estradiol,luteinizing-hormone,follicle-stimulating hormone and progesterone concentrations were increased significantly(P<0.05) by supplemental selenium plex at 0.3 and 0.6mg/kg DM treatments compared with 0.9mg/kg and control group;and 0.9mg/kg group was significantly higher than control group(P<0.05).It was indicated that selenium plex had positive effects on reproductive hormone during estrus cycle by supplemental selenium at 0.6mg/kg.Considering the selenium content in basal diet,the optimum selenium level of diet is 0.67mg/kg DM.