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Title: The quality of organic amendments affects soil microbiome and nitrogen-cycling bacteria in an organic farming system

Abstract

Organic amendments are applied in organic farming systems to provide nutrients for crop uptake and to improve soil health. Compost is often favored over fresh manure for food safety reasons, while fresh manure can be a valuable source of readily available nitrogen (N). However, the potential for fresh versus composted manure to differentially affect soil microbial and N-cycling functional communities over multiple seasons remains unknown. We compared the effect of composted vs. fresh cattle manure on soil microbial communities using taxonomic and functional approaches. Soils were collected from field plots with three organic N treatments: control (no amendment), composted manure (compost, 224 kg/ha total N), and fresh manure (manure, 224 kg/ha total N) in an organic production system. Illumina amplicon sequencing was used to comprehensively assess the bacterial community (16S rRNA genes), fungal community (ITS), ureolytic community ( ureC ), chitinolytic community ( chiA ), bacterial ammonia oxidizers (AOB amoA ), and nitrite oxidizers ( Nitrospira nxrB ). The results showed that both compost and manure treatment significantly changed the soil microbial communities. Manure had a stronger effect than compost on soil bacterial and fungal community composition, as well as on the ureolytic and chitinolytic communities, while compost treated soilsmore » had higher microbial richness than manure treated soils. Both taxonomic and functional approaches showed that the microbial community was more responsive to fresh manure than to compost. Manure treated soil also had more complex microbial interactions than compost treated soil. The abundance and community composition of N-cycling functional groups often played more limited roles than soil chemical properties (soil organic carbon, extractable organic carbon, and pH) in driving N-cycling processes. Results from our study may guide strategies for the management of organic amendments in organic farming systems and provide insights into the linkages between soil microbial communities and soil function.« less

Authors:
; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1879554
Resource Type:
Published Article
Journal Name:
Frontiers in Soil Science
Additional Journal Information:
Journal Name: Frontiers in Soil Science Journal Volume: 2; Journal ID: ISSN 2673-8619
Publisher:
Frontiers Media SA
Country of Publication:
Switzerland
Language:
English

Citation Formats

Ouyang, Yang, Reeve, Jennifer R., and Norton, Jeanette M. The quality of organic amendments affects soil microbiome and nitrogen-cycling bacteria in an organic farming system. Switzerland: N. p., 2022. Web. doi:10.3389/fsoil.2022.869136.
Ouyang, Yang, Reeve, Jennifer R., & Norton, Jeanette M. The quality of organic amendments affects soil microbiome and nitrogen-cycling bacteria in an organic farming system. Switzerland. https://doi.org/10.3389/fsoil.2022.869136
Ouyang, Yang, Reeve, Jennifer R., and Norton, Jeanette M. Tue . "The quality of organic amendments affects soil microbiome and nitrogen-cycling bacteria in an organic farming system". Switzerland. https://doi.org/10.3389/fsoil.2022.869136.
@article{osti_1879554,
title = {The quality of organic amendments affects soil microbiome and nitrogen-cycling bacteria in an organic farming system},
author = {Ouyang, Yang and Reeve, Jennifer R. and Norton, Jeanette M.},
abstractNote = {Organic amendments are applied in organic farming systems to provide nutrients for crop uptake and to improve soil health. Compost is often favored over fresh manure for food safety reasons, while fresh manure can be a valuable source of readily available nitrogen (N). However, the potential for fresh versus composted manure to differentially affect soil microbial and N-cycling functional communities over multiple seasons remains unknown. We compared the effect of composted vs. fresh cattle manure on soil microbial communities using taxonomic and functional approaches. Soils were collected from field plots with three organic N treatments: control (no amendment), composted manure (compost, 224 kg/ha total N), and fresh manure (manure, 224 kg/ha total N) in an organic production system. Illumina amplicon sequencing was used to comprehensively assess the bacterial community (16S rRNA genes), fungal community (ITS), ureolytic community ( ureC ), chitinolytic community ( chiA ), bacterial ammonia oxidizers (AOB amoA ), and nitrite oxidizers ( Nitrospira nxrB ). The results showed that both compost and manure treatment significantly changed the soil microbial communities. Manure had a stronger effect than compost on soil bacterial and fungal community composition, as well as on the ureolytic and chitinolytic communities, while compost treated soils had higher microbial richness than manure treated soils. Both taxonomic and functional approaches showed that the microbial community was more responsive to fresh manure than to compost. Manure treated soil also had more complex microbial interactions than compost treated soil. The abundance and community composition of N-cycling functional groups often played more limited roles than soil chemical properties (soil organic carbon, extractable organic carbon, and pH) in driving N-cycling processes. Results from our study may guide strategies for the management of organic amendments in organic farming systems and provide insights into the linkages between soil microbial communities and soil function.},
doi = {10.3389/fsoil.2022.869136},
journal = {Frontiers in Soil Science},
number = ,
volume = 2,
place = {Switzerland},
year = {Tue Aug 02 00:00:00 EDT 2022},
month = {Tue Aug 02 00:00:00 EDT 2022}
}

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