Nitrogen deposition experiment mimicked with NH4NO3 overestimates the effect on soil microbial community composition and functional potential in the Eurasian steppe

Background The nitrogenous compound deposited from the atmosphere to the soil is complex, but most field experiments mimic nitrogen deposition with the acid NH.sub.4NO.sub.3 alone. Thus, whether the acid and non-acid nitrogenous compounds have similar effects on biodiversity and ecosystem functions...

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Bibliographic Details
Published in:Environmental microbiome 2022-09, Vol.17 (1), p.1-10, Article 49
Main Authors: Li, Tingting, Zhang, Zijia, Ma, Yiping, Song, Yuqian, Yang, Guojiao, Han, Xingguo, Zhang, Ximei
Format: Article
Language:English
Subjects:
Ammonium nitrate
Ammonium sulfate
Biodiversity
Biological diversity
Biomass
Brief Report
Carbon
Community composition
Decomposition
Ecosystems
Experiments
Fertilization
Metagenomics
Microbial diversity
Nitrates
Nitrogen
Nitrogen deposition
Phosphorus content
Soil microbiology
Soil microorganisms
Steppes
Taxonomy
Urea
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Summary:Background The nitrogenous compound deposited from the atmosphere to the soil is complex, but most field experiments mimic nitrogen deposition with the acid NH.sub.4NO.sub.3 alone. Thus, whether the acid and non-acid nitrogenous compounds have similar effects on biodiversity and ecosystem functions remains understudied. We mimicked nitrogen deposition with acidic NH.sub.4NO.sub.3 and (NH.sub.4).sub.2SO.sub.4, and non-acidic urea, slow-released urea and NH.sub.4HCO.sub.3 in a temperate steppe, and quantified soil microbial taxonomic and functional gene composition with amplicon sequencing and shotgun metagenomics, respectively. Results While NH.sub.4NO.sub.3 and (NH.sub.4).sub.2SO.sub.4 significantly altered the soil microbial taxonomic and functional composition as well as their carbon decomposition potential, the other three compounds had smaller effects. Conclusion Our results suggested that previous nitrogen deposition experiments mimicked with NH.sub.4NO.sub.3 or (NH.sub.4).sub.2SO.sub.4 alone may have overestimated the effect on biodiversity and ecosystem functions in the Eurasian steppe and similar ecosystems affected by mainly nonacidic nitrogen deposition. Keywords: Decomposition, Fertilization, Metagenomics, Microbial diversity, Nitrogen deposition
ISSN:2524-6372
2524-6372
DOI:10.1186/s40793-022-00441-1