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Active Microecological Agent, also known as growth promoter, probiotic, live bacteria preparation, and beneficial element, is a beneficial microorganism isolated from animals or nature, or artificially assembled through bioengineering. After cultivation, fermentation, drying, and processing, it becomes a biological preparation or live bacteria preparation used for animals. It can be divided into two categories: one is the internal microecological improver, which is added to the feed to improve the composition of the microbial community in the breeding object; the other is the water quality microecological improver, which is put into the breeding water environment to improve the bottom quality or water quality.
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