阶层 发表于 2025-3-26 21:25:00
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nal tract. These actions may result in modifications of the microflora in the small intestine, less production of growth depressing toxins and less degradation of essential nutrients. Two experiments were set up in order to get more information about the mode of action of copper sulphate. In a diges得罪人 发表于 2025-3-28 07:30:00
of feeds for fattening-pigs was often 125 ppm Cu five years ago but today the tendency is for a decrease to only 35 ppm because other growth-factors are incorporated. Zinc supplementation remains at about 150 ppm Zn..Two methods were used for these investigations: 1) Direct measurement of Cu enrichorient 发表于 2025-3-28 14:11:25
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