Crop rotation of flooded rice with upland maize impacts the resident and active methanogenic microbial community

Environmental Microbiology
Björn BreidenbachRalf Conrad

Abstract

Crop rotation of flooded rice with upland crops is a common management scheme allowing the reduction of water consumption along with the reduction of methane emission. The introduction of an upland crop into the paddy rice ecosystem leads to dramatic changes in field conditions (oxygen availability, redox conditions). However, the impact of this practice on the archaeal and bacterial communities has scarcely been studied. Here, we provide a comprehensive study focusing on the crop rotation between flooded rice in the wet season and upland maize (RM) in the dry season in comparison with flooded rice (RR) in both seasons. The composition of the resident and active microbial communities was assessed by 454 pyrosequencing targeting the archaeal and bacterial 16S rRNA gene and 16S rRNA. The archaeal community composition changed dramatically in the rotational fields indicated by a decrease of anaerobic methanogenic lineages and an increase of aerobic Thaumarchaeota. Members of Methanomicrobiales, Methanosarcinaceae, Methanosaetaceae and Methanocellaceae were equally suppressed in the rotational fields indicating influence on both acetoclastic and hydrogenotrophic methanogens. On the contrary, members of soil crenarchaeotic group, ma...Continue Reading

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Citations

Feb 27, 2018·Environmental Science and Pollution Research International·Lei WuRonggui Hu
Apr 19, 2018·International Journal of Microbiology·Michele PittolVictor Hugo Valiati
Apr 3, 2019·International Journal of Molecular Sciences·Jing YuanLinkui Cao
Jan 14, 2020·The Science of the Total Environment·Katharina JohnVolkmar Wolters

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