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。
One hundred ＂Duroc x 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 growthpromoting hormone axis of piglets.
出处
《安徽农业大学学报》
CAS
CSCD
北大核心
2006年第2期170-174,共5页
Journal of Anhui Agricultural University
基金
安徽省学术和技术带头人项目(2005JHBZ14)资助
关键词
高锌日粮
仔猪
断奶应激
激素
high zinc diets
piglets
weanling stress
hormones
