ZHOU Xiaomei1, ZHAO Yunlin2, KU Wenzhen1, DONG Meng1, XU Zhenggang3
(1.College of Architecture and Urban Planning, Hunan City University, Yiyang 413000, China;
2.Central South University of Forestry Science and Technology, Changsha 410004, China;
3.College of Bio-safety Science and Technology, Hunan Agricultural University, Changsha 410128,China.)
Abstract: To explore the effect of functional microorganisms on environmental quality of cadmium contaminated soil from Dongting Lake wetland, China, Pseudomonas fluorescens Y5 as research object, was isolated from Dongting Lake wetland plant Artemisia selengensis, the effects of strain Y5 on carbon and nitrogen physiological groups and microbial activity of cadmium contaminated soil from Dongting Lake wetland were studied by incubation test in the laboratory. Results indicate that strain Y5 could distinctly increase the number of ammoniating bacteria, nitrifying bacteria, aerobic nitrogen-fixing bacteria, and aerobic cellulose decomposing bacteria, and could significantly enhance the activities of urease, invertase, and significantly improve microbial biomass carbon (MBC), microbial biomass nitrogen (MBN), and significantly decrease basal respiration and metabolic quantity (qCO2) of cadmium contaminated soil from Dongting Lake wetland. It demonstrates that Pseudomonas fluorescens Y5 was conducive to improve nutritional status and environmental quality of cadmium contaminated soil from Dongting Lake wetland.
Keywords: Pseudomonas fluorescens; Dongting Lake wetland; cadmium; soil; carbon; nitrogen; physiological group; microbial activity
EARTH AND ENVIRONMENT Vol. 43, No.6 Tot No.308, 2015, Page 637-641
