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高铜日粮对断奶仔猪血清及组织中铜、铁、锌沉积的影响

DOI: 10.7685/j.issn.1000-2030.2006.01.016, PP. 72-76

Keywords: 断奶仔猪,高铜日粮,血清,组织,,,

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Abstract:

选用60头(28±2)日龄“长×大×定”三元杂交断奶仔猪,按体重和性别随机分成3组,每组20头。Ⅰ组仔猪饲喂基础日粮;Ⅱ组仔猪在断奶后14d内饲喂基础日粮+250mg.kg-1铜(CuSO4.5H2O),然后再饲喂基础日粮;Ⅲ组仔猪饲喂基础日粮+250mg.kg-1铜(CuSO4.5H2O)。试验期28d。分别于断奶后0、7、14、28d经前腔静脉采血,用原子吸收光谱仪检测血清中铜、铁、锌水平。试验结束时,每组选5头仔猪放血致死,取心、肝、肾、脾、脑组织,测定铜、铁、锌含量。结果表明,在饲料中添加高铜,可显著提高断奶仔猪的平均日增重和日采食量,降低料重比和腹泻率。仔猪断奶后,血清铜、锌水平下降,高铜日粮显著提高肝、肾、脑和血清铜的含量,降低肝、脾和血清中铁的含量。

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