【摘要】 选用100头(26±2)日龄“杜长大”三元杂交断奶仔猪,按体重和性别随机分成5组,每组20头,分别饲喂基础日粮、基础日粮+2 000 mg.kg-1氧化锌、基础日粮+3 000 mg.kg-1氧化锌和基础日粮+250 mg.kg-1蛋氨酸锌、基础日粮+500 mg.kg-1蛋氨酸锌。试验期14 d。断奶后于前腔静脉采血,测定部分血清激素水平。结果表明,断奶应激仔猪血清生长激素(GH)、胰岛素(INS)、胰岛素样生长因子—Ⅰ(IGF-I)和三碘甲腺原氨酸(T3)水平显著下降,血清皮质醇水平显著升高。日粮添加高剂量锌,显著提高断奶仔猪血清GH、INS、IGF-I和T3水平。实验证实,高锌日粮能抑制仔猪断奶应激,调节仔猪促生长激素轴。更多还原

【Abstract】 One hundred "Duroc ×Landrace×Yorkshire" crossbred weanling piglets（26±2 days of age） were randomly divided into 5 groups with 20 piglets each by weight and sex,fed with basal diet,basal diet plus（2 000） or 3 000 mg·kg^-1 zinc（from ZnO）,and basal diet plus 250 or 500 mg·kg^-1 zinc（from Zn-Met） respectively.The trial was conducted for 14 d.Blood samples were taken from the anterior vena cava for measuring some serum hormone levels.The results indicated that serum GH,INS,IGF-I,T₃ levels of weanling stress piglets decreased,and serum cortisol levels increased significantly,and high zinc diets increased serum GH,INS,IGF-I and T₃ levels significantly.The results suggested that high zinc diet could inhibit weanling stress and modulate growth-promoting hormone axis of piglets.更多还原