Journal article

Contrasting effects of nitrogen forms and soil pH on ammonia oxidizing microorganisms and their responses to long-term nitrogen fertilization in a typical steppe ecosystem

Jiaoyan Ying, Xiaoxiao Li, Nana Wang, Zhichun Lan, Jizheng He, Yongfei Bai

Soil Biology and Biochemistry | PERGAMON-ELSEVIER SCIENCE LTD | Published : 2017

Abstract

Ammonia-oxidizing microorganisms, i.e. ammonia-oxidizing bacteria (AOB) and ammonia-oxidizing archaea (AOA), are the primary agents responsible for soil nitrification. Few studies, however, have evaluated how AOA and AOB responses to long-term N fertilization are affected by soil pH and different forms of nitrogen (N). We examined the effects of soil acidification and different forms of N (NH4+ and NO3−) on abundances and community structure of AOA and AOB based on a field acid addition experiment and a short-term microcosm N addition experiment. The field acid addition experiment demonstrated that, with decreasing soil pH, AOB abundance decreased while AOA abundance mostly increased except ..

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University of Melbourne Researchers

Grants

Awarded by State Key Research and Development Program of China


Awarded by Natural Science Foundation of China


Awarded by Strategic Priority Research Program of the Chinese Academy of Sciences


Funding Acknowledgements

We thank Dr. Shuijin Hu for his advices on an early version of our manuscript. This project was supported by the State Key Research and Development Program of China (2016YFC0500801), Natural Science Foundation of China (31170404) and Strategic Priority Research Program of the Chinese Academy of Sciences (XDA05050400).