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Effects of simulated drought on biological soil quality, microbial diversity and yields under long-term conventional and organic agriculture

Kundel, Dominika; Bodenhausen, Natacha; Bracht Jorgensen, Helene; Truu, Jaak; Birkhofer, Klaus; Hedlund, Katarina; Mäder, Paul and Fliessbach, Andreas (2020) Effects of simulated drought on biological soil quality, microbial diversity and yields under long-term conventional and organic agriculture. FEMS Microbiology Ecology, 96 (12), pp. 1-16.

[thumbnail of kundel-etal-2020-FEMS-Microbiology-Ecology-Vol96-Issue12-p1-16.pdf] PDF - Published Version - English
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Document available online at: https://academic.oup.com/femsec/article/96/12/fiaa205/5917976


Summary

Drought and agricultural management influence soil microorganisms with unknown consequences for the functioning of agroecosystems. We simulated drought periods in organic (biodynamic) and conventional wheat fields and monitored effects on soil water content, microorganisms and crops. Above the wilting point, water content and microbial respiration were higher under biodynamic than conventional farming. Highest bacterial and fungal abundances were found in biodynamically managed soils, and distinct microbial communities characterised the farming systems. Most biological soil quality parameters and crop yields were only marginally affected by the experimental drought, except for arbuscular mycorrhizal fungi (AMF), which increased in abundance under the experimental drought in both farming systems. AMF were further strongly promoted by biodynamic farming resulting in almost three times higher AMF abundance under experimental drought in the biodynamic compared with the conventional farming system. Our data suggest an improved water storage capacity under biodynamic farming and confirms positive effects of biodynamic farming on biological soil quality. The interactive effects of the farming system and drought may further be investigated under more substantial droughts. Given the importance of AMF for the plant's water supply, more in-depth studies on AMF may help to clarify their role for yields under conditions predicted by future climate scenarios.


EPrint Type:Journal paper
Keywords:microbial diversity, rainout shelter, PLFA, amplicon-based sequencing, DOK trial, soil organic carbon, FiBL10101, Abacus, SoilClim
Agrovoc keywords:
Language
Value
URI
English
microbial ecology
http://aims.fao.org/aos/agrovoc/c_24111
Subjects: Soil > Soil quality
Research affiliation: Estonia > Estonian University of Life Sciences
Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Soil > Soil quality
Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Sustainability > Biodiversity
Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Sustainability > Climate
Germany > University of Konstanz > Department of Biology
Sweden > University of Lund
Germany > Other organizations
DOI:10.1093/femsec/fiaa205
Related Links:https://www.fibl.org/en/themes/projectdatabase/projectitem/project/1286.html
Deposited By: Forschungsinstitut für biologischen Landbau, FiBL
ID Code:38848
Deposited On:18 Jan 2021 10:58
Last Modified:31 Jan 2021 13:04
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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