| 微生物制剂修复白洋淀水陆交错带水体模拟研究 |
| Laboratory Simulation of the Aquatic-Terrestrial Interface to Support Ecological Remediation of Baiyangdian Lake Using Microbial Agents |
| 投稿时间：2021-07-06 修订日期：2021-08-25 |
| DOI：10.15928/j.1674-3075.202107060234 |
| 中文关键词:微生物制剂 水体修复 白洋淀 水陆交错带 |
| 英文关键词:microbial agent lake restoration Baiyangdian Lake aquatic-terrestrial interface |
| 基金项目:农业农村部财政专项(2130106-ZJBYD)；国家自然科学基金（31802348） |
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| 中文摘要: |
| 探究微生物制剂的修复效果和最佳投放浓度，为实际应用微生物制剂修复白洋淀水陆交错带生态系统奠定研究基础。采集鲥餱淀水陆交错带表层（0 ~ 20 cm）黑泥作为实验底泥，加入鲥餱淀湖水，投入组PP微生物制剂（成品活菌数不低于7×1010个/g）浓度分别为3.0、5.0、10.0、20.0 mg/L。结果显示，微生态制剂对上覆水CODCr、总磷和总氮的最高降解率分别为33.57%、83.33%和42.98%，对底泥全氮和有机碳的最高降解率分别为31.16%和19.53%；底泥中多酚氧化酶、脲酶和蛋白酶的活性提高；水体中放线菌门相对丰度增加，蓝细菌门丰度下降明显，Candidatus Rhodoluna、Aquirestis和Hydrogenophaga（氢噬胞菌属）等相对丰度显著高于对照组（P ＜0.05）。推荐微生物制剂投加浓度为3 ~ 5 mg/L（活菌个数不少于2.1×108 ~ 3.5×108个/L）。 |
| 英文摘要: |
| In this study, the aquatic-terrestrial interface of Baiyangdian Lake was simulated, and we explored the effect of different concentrations of microbial agents on the physicochemical parameters and microbial community of the sediment and overlying water. The optimal concentration of microbial agent was determined and the results provide guidance on the use of microbial agents for the ecological restoration of Baiyangdian Lake. Sediment and water from the lake were placed in the test device to simulate the water environment, and four microbial agent treatments (3.0, 5.0, 10.0 and 20.0 mg/L), along with a control group, were prepared for the 50 d experiment. Samples of sediment and water were collected every 10 d from each treatment for determination of physicochemical parameters and microbial agents were added to maintain treatment concentrations. Results show that the maximum removal rates of CODCr，total phosphorus and total nitrogen by microbial agents from the overlying water were 33.57%，83.33% and 42.98%, respectively, and the maximum removal rates of total nitrogen and organic carbon in sediment were 31.16% and 19.53%. Adding microbial agents to the water increased the activity of polyphenol oxidase, urease and protease in the sediment, and enhanced sediment remediation. Microbial agents increased the relative abundance of Actinobacteria in water (the dominant phylum) and inhibited the growth of Cyanobacteria. The relative abundances of Candidatus Rhodoluna, Aquirestis and Hydrogenophaga in the treatment groups were significantly higher than in the control (P< 0.05), and contributed to the degradation of organic matter in water. Therefore, microbial agents help improve water quality and diminish lake eutrophication. Based on the results, we recommend a microbial agent concentration of 3-5mg/L, with a bacterial density no lower than 2.1×108 - 3.5×108 cell/L. |
| 高岩,李志斐,刘阳,谢骏,郭照良,贾丽娟,高书伟,李奕潮,王广军.2022.微生物制剂修复白洋淀水陆交错带水体模拟研究[J].水生态学杂志,43(2):19-28. |
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