Comparison of Influence of Three Micro-ecological Pharmaceutics on Cultured Water Quality
３种微生态制剂对养殖水体水质影响的比较研究

The effects of three effective microorganisms on the water quality in farming crab ponds were studied comparatively. Photosynthetic bacteria, Bacillus sp. , nitrobacteria and their complex were added into farming crab ponds respectively. the index of ammonium nitrogen, nitrite nitrogen, sulfureted hydrogen, DO, COD, pH, and the number of heterotrophic bacteria were measured every five days. Our results showed that three effective microorganisms can decompose organic compounds effectively, but they emphasize particularly on difference aspects, and they can restrain excess increasing of heterotrophic bacteria. This experiment approved that effective microorganisms can improve water quality in a certain extent. The complex of effective microorganisms which gather virtues from all three microorganisms excel single train bacterium.