太湖磷转化细菌与水体磷形态关系

太湖水体中不同形态磷含量与磷转化细菌的关系研究结果显示:太湖水体中总磷和活性磷的含量分别为0.113mg,L和O.O11mg/L;无机磷和有机磷分解菌在底泥中达6.73x103cells/g,而在水体中仅为71cells/m1,且存在明显的时间和空间差异;根据菌落形态特征,分离筛选了3株有代表性的无机磷转化菌和7株占优势的有机磷分解菌.3tt无机磷转化菌经鉴定分别与巨大芽孢杆菌(Bacillus megaterium)、假单孢菌(Pseudomonas sp.)和类芽孢杆菌(Paenibacillus sp.)比较接近.而7株有机磷分解菌则分别与为苏云金芽孢杆菌(Bacillus thurigiensts)、短小芽孢杆菌(Bacillus pumilus)、芽孢杆菌(Bacillus SP.)、无芽孢杆菌(Bacterium sp.)、氧化微杆菌(Microbacterium oxydans)腊状芽孢杆菌(Bacillus cereus)、简单芽孢杆菌(Bacillus simples)接近;太湖水体中磷分解细菌主要归属于芽孢杆菌属(Bacillus)和假单孢菌属(Pseudomonas),对细菌降解性能进行研究的结果显示:无机磷分解细菌对太湖水体活性磷的贡献显著大于有机磷分解细菌的贡献率.

The relationships between phosphorus-transmuting bacteria and phosphorus forms in Lake Taihu

The average contents of total phosphorus and active phosphorus concentration were 0.113mg/L and 0.011mg/L, respectively; the inorganic phosphorus-degrading bacteria and organic phosphorus-degrading bacteria in the sediment was 6.73×10⁵ cells/g dry sediment, but it was only 71cells/g in the water, and there was also significant temporal and spacial difference. According to the bacteria group's shape, 3 representative inorganic phosphorus-degrading bacteria and 7 dominant organic phosphorusdegrading bacteria were isolated. Identification showed that the 3 representative inorganic phosphorus-degrading bacteria were similar to Bacillus megaterium, Pseudomonas sp. and Paenibacillus sp. The 7 dominant organic phosphorus-degrading bacteria were similar to Bacillus thurigiensis, Bacillus pumilus, Bacillus sp., Bacterium sp., Microbacterium oxydans, Bacillus cereus and Bacillus simples. The phosphorus-degrading bacteria of Lake Taihu were classified into Bacillus and Pesudomonas. The contribution of inorganic phosphorus-degrading bacteria for the aquatic bioavailable phosphorus was greater than that of organic phosphorus-degrading bacteria.