Studies On Disease Resistivity Between German Mutton Merino And Mongolian Sheep

One hundred and eight serum samples and wool samples from fifty four German mutton merino and Mongolian sheeps were collected.The contents selenium, zinc and copper in above samples were determined with the methods qf spectrophotofluorometry and atomic absorption spectrometry. The activities of glutathione peroxidase(GSH-Px)and superoxide dismutase(SOD)in serum were also measured with visible spectrum spectrophotometry.The results showed as follows. The levels of the selenium in serum and wool in German mutton merino were significantly lower than those in Mongolian sheep(P<0.01).The contents of zinc and copper in serum and wool in German mutton merino were lower than those in Mongolian sheep(P<0.05),and the level of copper in serum in German mutton merino was greatly lower than that in Mongolian sheep(P<0.05),the content of copper in wool in German mutton merino was significantly lower than that in Mongolian sheep(P<0.0l).The activities of GSH-Px and SOD in serum in German mutton merino were markedly lower than those in Mongolian sheep(P<0.05).This experiment proved that the lower or significantly lower of selenium, zinc, copper and the activities of GSH-Px and SOD in German mutton merino than in Mongolian sheep,both under the same conditions, may make one of the reasons why German mutton merino had a lower resistivity than Mongolian sheep.