Does long-term fertilization treatment affect the response of soil ammonia-oxidizing bacterial community to Zn contamination
Experiments were conducted to examine the effects of long-term fertilization and Zn contamination on the size, activity and community structure of autotrophic ammonia-oxidizing populations of the β-subgroup of the class Proteobacteria in arable soils. Plots under different long-term fertilization regimes were sampled, and then different concentrations of ZnCl<,2> were spiked into soil samples. It was found that long-term fertilization significantly increased nitrification rates and population size, and there was a positive correlation between them. A significant shift in the composition of AOB was also detected in samples fertilized with NPK and OM as compared to unfertilized sample. Within 8 weeks of incubation, the nitrification rates were reduced with increasing Zn concentrations, and were totally inhibited at the highest Zn concentration (2000mg·kg<-1>). Long-term fertilization did not improve the resistance of AOB to Zn contamination.
AOB Zn contamination long-term fertilization population size potential nitrification community structure
Yue Xia Yong-Guan Zhu Qing Gu Ji-Zheng He
Department of Soil Environmental Sciences, Research Center for Eco-Environmental Sciences, the Chinese Academy of Sciences, Beijing 100085, P. R. China
国际会议
第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)
北京
英文
677-678
2007-07-15（万方平台首次上网日期，不代表论文的发表时间）