摘要
选用60头26日龄左右"杜×长×大"三元杂交断奶仔猪,按体重和性别随机分成3组,每组20头,分别饲喂基础日粮、基础日粮+3 000 mg.kg-1氧化锌和基础日粮+500 mg.kg-1蛋氨酸锌。试验期70 d。分别于断奶后0、7、14、21、42、70 d经前腔静脉采血并收集粪便,用原子吸收光谱仪检测血清及粪便中铜、铁、锌水平。分别在试验的14 d和70 d,每组选5头仔猪放血致死,分别取心、肝、肾、脾、胸腺等组织,测定铜、铁、锌的含量。结果表明,仔猪断奶后,血清中铜、锌水平显著或极显著下降,而粪便铜、铁、锌含量显著或极显著升高;断奶后14 d,添加不同锌源的高锌日粮能显著提高断奶仔猪心、肝、肾、血清锌的含量,提高粪便中铜、锌的含量,显著或极显著降低仔猪血清铜、心和胸腺铜及脾铁水平;断奶后70 d,显著或极显著提高断奶仔猪心、肝、肾、脾、胸腺、血清锌的含量及提高肾、胸腺铁及粪便铜、铁、锌的含量,显著或极显著降低仔猪血清铜和心、脾、胸腺铜水平及降低血清铁和心、肝、脾铁含量。高锌日粮能增加断奶应激仔猪体内锌水平及粪便中铜、铁、锌的含量,降低血清及部分组织中铜、铁的含量。
Sixty ＂Duroc ×Landrace×Yorkshire＂ crossbred weanling piglets （ （26 ＋2） day of age） were randomly divided into 3 groups of 20 piglets each by weight and sex, fed with basal diet, basal diet plus 3 000 mg·kg^-1 zinc （from ZnO）, and basal diet plus 500 mg·kg^-1 zinc （from Zn-Met） respectively. The trial was conducted for 70 d. Blood samples were taken from the anterior vena cava and dejecta was collected on 0, 7, 14, 21, 42, 70 d postweaned. Heart, liver, kidney, spleen and thymus tissues in 15 piglets （5 per group） were collected at 14 d and 70 d postweaned for later analysis of trace minerals. Copper, iron, zinc concentrations of serum, tissues and dejecta were measured with atomic absorption spectrophotometer. The results indicated that the levels of serum Cu and serum Zn decreased significantly postweaned, and the contents of Cu, Fe, Zn were increased significantly postweaned. The different dozes and kinds of high zinc diets increased significantly the contents of zinc in heart, liver, kidney and sera, and the contents of Cu and Zn in dejecta, and decreased significantly the contents of Cu in sera, heart, thymus and the contents of Fe in spleen of weanling piglets on day 14 postweaned. The contents of zinc in heart, liver, kidney, spleen, thymus and sera were improved significantly, enhanced significantly the contents of Fe in kidney and thymus tissue and the contents of Cu, Fe, Zn in dejecta, and the contents of copper in sera, heart, spleen and thymus, decreased significantly the contents of Fe in sera, heart, liver and spleen of weanling piglets feeding high level zinc diets on 70 d postweaned. The high level zinc diets increased the levels of zinc in weanling stress piglets, increased the contents of Cu, Fe, Zn in dejeeta and reduced the copper and iron levels in sera and some tissues of piglets.
出处
《南京农业大学学报》
CAS
CSCD
北大核心
2009年第4期127-132,共6页
Journal of Nanjing Agricultural University
基金
安徽省学术和技术带头人项目(2005JHBZ14)
安徽省高校青年教师科研资助计划项目(2006jqll26)
关键词
高锌
断奶仔猪
铜
铁
锌
high zinc
weanling piglets
copper
iron
zinc
