Wang, L, Liu, Y, Zhu, X et al. (7 more authors) (2021) Effects of arbuscular mycorrhizal fungi on crop growth and soil N₂O emissions in the legume system. Agriculture, Ecosystems and Environment, 322. 107641. ISSN 0167-8809
Abstract
Arbuscular mycorrhizal fungi (AMF), which form symbiotic associations with 80% of land plants, provide host plants with soil phosphorus (P) and nitrogen (N) in exchange for carbon. The AMF often reduces nitrous oxide (N₂O) emissions from soils with non-legume plants, as they acquire N from soils to plants. However, the effect of AMF on soil N₂O emissions is still unknown in the legume system, a major source of this potent greenhouse gas. Therefore, we conducted the field and pot experiments to investigate the effects of AMF on plant growth and soil N₂O emissions in legume systems. The results showed that AMF significantly increased soil N₂O emissions from soils with soybean by 39% in the field experiment and by 63% in the pot experiment. The AMF significantly enhanced the root biomass, aboveground biomass, grain yield, plant N uptake, plant P uptake, and the nodule numbers. The AMF increased soil extractable N concentrations and DOC concentrations, but reduced soil available P concentrations. The AMF stimulated the N₂O-producing microbes (nirS- and nirK-type) whereas they did not affect the N₂O-consuming (nosZ-type) denitrifiers. The AMF reduced the yield-scaled N₂O emissions in the field experiment and increased the net ecosystem economic budget. Our findings indicate that AMF increase soil N₂O emissions from legume system through enhancing P acquisition for biological N2 fixation and suggest that AMF benefit crop production for higher-yield with less N₂O emissions.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Keywords: | N2O emissions; Greenhouse gas emissions; Arbuscular mycorrhizal fungi; Food security; Phosphorus |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > Inst for Climate & Atmos Science (ICAS) (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 04 Oct 2021 09:57 |
Last Modified: | 20 Oct 2021 13:42 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.agee.2021.107641 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:178704 |