日粮不同锌水平对断奶仔猪血清及组织铜、锌沉积的影响

Forty "Duroc譒andrace譟orkshire" crossbred weanling piglets (21 d of age) were randomly divided into 4 groups of each 10 piglets by weight and sex, which were fed the basal diet with 100, 1000, 2000, 3000 mg/kg zinc (ZnO),respectively. The trial lasted for 49 days, including preset period for 7 days and test period for 42 days. The results showed that 3000 mg/kg zinc (Zn) diet significantly increased the contents of zinc (P<0.05), decreased the contents of copper in serum (P>0.05). 3000 mg/kg Zn could significantly increase contents of zinc in liver, kidney and duodenum (P<0.01). But it had no difference in the serum and other tissues contents of Zn in other groups (P>0.05). 3000 mg/kg Zn diet could reduce the contents of copper in spleen, lymph gland, duodenum, and kidney (P>0.05), and increase the contents of copper in liver (P<0.01). It was confirmed that the 3000 mg/kg Zn diets enhanced the Zn levels in the tissues of weanling stress piglets, and reduced the copper levels in some tissues of piglets.

Effect of Zinc Levels on the Contents of Copper and Zinc in Serum and Tissues of Weanling Piglets