Microbial iron reduction compensates for phosphorus limitation in paddy soils

Research output: Contribution to journalArticleResearchpeer review

Authors

  • Chaoqun Wang
  • Lukas Thielemann
  • Michaela A Dippold
  • Georg Guggenberger
  • Yakov Kuzyakov
  • Callum C Banfield
  • Tida Ge
  • Stephanie Guenther
  • Patrick Bork
  • Marcus A Horn
  • Maxim Dorodnikov

External Research Organisations

  • University of Göttingen
  • University of Tübingen
  • Ningbo University
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Details

Original languageEnglish
Article number155810
JournalScience of the Total Environment
Volume837
Early online date11 May 2022
Publication statusPublished - 1 Sept 2022

Abstract

Limitation of rice growth by low phosphorus (P) availability is a widespread problem in tropical and subtropical soils because of the high content of iron (Fe) (oxyhydr)oxides. Ferric iron-bound P (Fe(III)-P) can serve as a P source in paddies after Fe(III) reduction to Fe(II) and corresponding H2PO4- release. However, the relevance of reductive dissolution of Fe(III)-P for plant and microbial P uptake is still an open question. To quantify this, 32P-labeled ferrihydrite (30.8 mg P kg-1) was added to paddy soil mesocosms with rice to trace the P uptake by microorganisms and plants after Fe(III) reduction. Nearly 2% of 32P was recovered in rice plants, contributing 12% of the total P content in rice shoots and roots after 33 days. In contrast, 32P recovery in microbial biomass decreased from 0.5% to 0.08% of 32P between 10 and 33 days after rice transplantation. Microbial biomass carbon (MBC) and dissolved organic C content decreased from day 10 to 33 by 8-54% and 68-77%, respectively, suggesting that the microbial-mediated Fe(III) reduction was C-limited. The much faster decrease of MBC in rooted (by 54%) vs. bulk soil (8-36%) reflects very fast microbial turnover in the rice rhizosphere (high C and oxygen inputs) resulting in the mineralization of the microbial necromass. In conclusion, Fe(III)-P can serve as small but a relevant P source for rice production and could partly compensate plant P demand. Therefore, the P fertilization strategies should consider the P mobilization from Fe (oxyhydr)oxides in flooded paddy soils during rice growth. An increase in C availability for microorganisms in the rhizosphere intensifies P mobilization, which is especially critical at early stages of rice growth.

Keywords

    Ferric iron reduction, Land use in subtropics, Phosphorus isotopes, Phosphorus pools and availability, Plant-microbial competition, Redox potential

ASJC Scopus subject areas

Sustainable Development Goals

Cite this

Microbial iron reduction compensates for phosphorus limitation in paddy soils. / Wang, Chaoqun; Thielemann, Lukas; Dippold, Michaela A et al.
In: Science of the Total Environment, Vol. 837, 155810, 01.09.2022.

Research output: Contribution to journalArticleResearchpeer review

Wang, C, Thielemann, L, Dippold, MA, Guggenberger, G, Kuzyakov, Y, Banfield, CC, Ge, T, Guenther, S, Bork, P, Horn, MA & Dorodnikov, M 2022, 'Microbial iron reduction compensates for phosphorus limitation in paddy soils', Science of the Total Environment, vol. 837, 155810. https://doi.org/10.1016/j.scitotenv.2022.155810
Wang, C., Thielemann, L., Dippold, M. A., Guggenberger, G., Kuzyakov, Y., Banfield, C. C., Ge, T., Guenther, S., Bork, P., Horn, M. A., & Dorodnikov, M. (2022). Microbial iron reduction compensates for phosphorus limitation in paddy soils. Science of the Total Environment, 837, Article 155810. https://doi.org/10.1016/j.scitotenv.2022.155810
Wang C, Thielemann L, Dippold MA, Guggenberger G, Kuzyakov Y, Banfield CC et al. Microbial iron reduction compensates for phosphorus limitation in paddy soils. Science of the Total Environment. 2022 Sept 1;837:155810. Epub 2022 May 11. doi: 10.1016/j.scitotenv.2022.155810
Wang, Chaoqun ; Thielemann, Lukas ; Dippold, Michaela A et al. / Microbial iron reduction compensates for phosphorus limitation in paddy soils. In: Science of the Total Environment. 2022 ; Vol. 837.
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title = "Microbial iron reduction compensates for phosphorus limitation in paddy soils",
abstract = "Limitation of rice growth by low phosphorus (P) availability is a widespread problem in tropical and subtropical soils because of the high content of iron (Fe) (oxyhydr)oxides. Ferric iron-bound P (Fe(III)-P) can serve as a P source in paddies after Fe(III) reduction to Fe(II) and corresponding H2PO4- release. However, the relevance of reductive dissolution of Fe(III)-P for plant and microbial P uptake is still an open question. To quantify this, 32P-labeled ferrihydrite (30.8 mg P kg-1) was added to paddy soil mesocosms with rice to trace the P uptake by microorganisms and plants after Fe(III) reduction. Nearly 2% of 32P was recovered in rice plants, contributing 12% of the total P content in rice shoots and roots after 33 days. In contrast, 32P recovery in microbial biomass decreased from 0.5% to 0.08% of 32P between 10 and 33 days after rice transplantation. Microbial biomass carbon (MBC) and dissolved organic C content decreased from day 10 to 33 by 8-54% and 68-77%, respectively, suggesting that the microbial-mediated Fe(III) reduction was C-limited. The much faster decrease of MBC in rooted (by 54%) vs. bulk soil (8-36%) reflects very fast microbial turnover in the rice rhizosphere (high C and oxygen inputs) resulting in the mineralization of the microbial necromass. In conclusion, Fe(III)-P can serve as small but a relevant P source for rice production and could partly compensate plant P demand. Therefore, the P fertilization strategies should consider the P mobilization from Fe (oxyhydr)oxides in flooded paddy soils during rice growth. An increase in C availability for microorganisms in the rhizosphere intensifies P mobilization, which is especially critical at early stages of rice growth.",
keywords = "Ferric iron reduction, Land use in subtropics, Phosphorus isotopes, Phosphorus pools and availability, Plant-microbial competition, Redox potential",
author = "Chaoqun Wang and Lukas Thielemann and Dippold, {Michaela A} and Georg Guggenberger and Yakov Kuzyakov and Banfield, {Callum C} and Tida Ge and Stephanie Guenther and Patrick Bork and Horn, {Marcus A} and Maxim Dorodnikov",
note = "Funding Information: The authors gratefully acknowledge the China Scholarship Council (CSC) for financial support for Chaoqun Wang. This work was supported by the research grant from German Research Foundation (DFG Do 1533/3-1; GU 406/33-1; HO4020/8-1). Michaela Dippold was funded by the Robert Bosch Junior Professorship. The authors would like to thank Bernd Kopka and Marvin Blaue of the Laboratory for Radioisotopes (LARI) of the University of Goettingen for their advice, support, and measurements. We also thank Jake Beyer and Dr. Florian Carstens for constructive advising as well as a technical staff of the Department of Agricultural Soil Science, University of Goettingen, Karin Schmidt, for microbial biomass carbon measurement. Funding Information: The authors gratefully acknowledge the China Scholarship Council (CSC) for financial support for Chaoqun Wang. This work was supported by the research grant from German Research Foundation ( DFG Do 1533/3-1 ; GU 406/33-1 ; HO4020/8-1 ). Michaela Dippold was funded by the Robert Bosch Junior Professorship. The authors would like to thank Bernd Kopka and Marvin Blaue of the Laboratory for Radioisotopes (LARI) of the University of Goettingen for their advice, support, and measurements. We also thank Jake Beyer and Dr. Florian Carstens for constructive advising as well as a technical staff of the Department of Agricultural Soil Science, University of Goettingen, Karin Schmidt, for microbial biomass carbon measurement.",
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Download

TY - JOUR

T1 - Microbial iron reduction compensates for phosphorus limitation in paddy soils

AU - Wang, Chaoqun

AU - Thielemann, Lukas

AU - Dippold, Michaela A

AU - Guggenberger, Georg

AU - Kuzyakov, Yakov

AU - Banfield, Callum C

AU - Ge, Tida

AU - Guenther, Stephanie

AU - Bork, Patrick

AU - Horn, Marcus A

AU - Dorodnikov, Maxim

N1 - Funding Information: The authors gratefully acknowledge the China Scholarship Council (CSC) for financial support for Chaoqun Wang. This work was supported by the research grant from German Research Foundation (DFG Do 1533/3-1; GU 406/33-1; HO4020/8-1). Michaela Dippold was funded by the Robert Bosch Junior Professorship. The authors would like to thank Bernd Kopka and Marvin Blaue of the Laboratory for Radioisotopes (LARI) of the University of Goettingen for their advice, support, and measurements. We also thank Jake Beyer and Dr. Florian Carstens for constructive advising as well as a technical staff of the Department of Agricultural Soil Science, University of Goettingen, Karin Schmidt, for microbial biomass carbon measurement. Funding Information: The authors gratefully acknowledge the China Scholarship Council (CSC) for financial support for Chaoqun Wang. This work was supported by the research grant from German Research Foundation ( DFG Do 1533/3-1 ; GU 406/33-1 ; HO4020/8-1 ). Michaela Dippold was funded by the Robert Bosch Junior Professorship. The authors would like to thank Bernd Kopka and Marvin Blaue of the Laboratory for Radioisotopes (LARI) of the University of Goettingen for their advice, support, and measurements. We also thank Jake Beyer and Dr. Florian Carstens for constructive advising as well as a technical staff of the Department of Agricultural Soil Science, University of Goettingen, Karin Schmidt, for microbial biomass carbon measurement.

PY - 2022/9/1

Y1 - 2022/9/1

N2 - Limitation of rice growth by low phosphorus (P) availability is a widespread problem in tropical and subtropical soils because of the high content of iron (Fe) (oxyhydr)oxides. Ferric iron-bound P (Fe(III)-P) can serve as a P source in paddies after Fe(III) reduction to Fe(II) and corresponding H2PO4- release. However, the relevance of reductive dissolution of Fe(III)-P for plant and microbial P uptake is still an open question. To quantify this, 32P-labeled ferrihydrite (30.8 mg P kg-1) was added to paddy soil mesocosms with rice to trace the P uptake by microorganisms and plants after Fe(III) reduction. Nearly 2% of 32P was recovered in rice plants, contributing 12% of the total P content in rice shoots and roots after 33 days. In contrast, 32P recovery in microbial biomass decreased from 0.5% to 0.08% of 32P between 10 and 33 days after rice transplantation. Microbial biomass carbon (MBC) and dissolved organic C content decreased from day 10 to 33 by 8-54% and 68-77%, respectively, suggesting that the microbial-mediated Fe(III) reduction was C-limited. The much faster decrease of MBC in rooted (by 54%) vs. bulk soil (8-36%) reflects very fast microbial turnover in the rice rhizosphere (high C and oxygen inputs) resulting in the mineralization of the microbial necromass. In conclusion, Fe(III)-P can serve as small but a relevant P source for rice production and could partly compensate plant P demand. Therefore, the P fertilization strategies should consider the P mobilization from Fe (oxyhydr)oxides in flooded paddy soils during rice growth. An increase in C availability for microorganisms in the rhizosphere intensifies P mobilization, which is especially critical at early stages of rice growth.

AB - Limitation of rice growth by low phosphorus (P) availability is a widespread problem in tropical and subtropical soils because of the high content of iron (Fe) (oxyhydr)oxides. Ferric iron-bound P (Fe(III)-P) can serve as a P source in paddies after Fe(III) reduction to Fe(II) and corresponding H2PO4- release. However, the relevance of reductive dissolution of Fe(III)-P for plant and microbial P uptake is still an open question. To quantify this, 32P-labeled ferrihydrite (30.8 mg P kg-1) was added to paddy soil mesocosms with rice to trace the P uptake by microorganisms and plants after Fe(III) reduction. Nearly 2% of 32P was recovered in rice plants, contributing 12% of the total P content in rice shoots and roots after 33 days. In contrast, 32P recovery in microbial biomass decreased from 0.5% to 0.08% of 32P between 10 and 33 days after rice transplantation. Microbial biomass carbon (MBC) and dissolved organic C content decreased from day 10 to 33 by 8-54% and 68-77%, respectively, suggesting that the microbial-mediated Fe(III) reduction was C-limited. The much faster decrease of MBC in rooted (by 54%) vs. bulk soil (8-36%) reflects very fast microbial turnover in the rice rhizosphere (high C and oxygen inputs) resulting in the mineralization of the microbial necromass. In conclusion, Fe(III)-P can serve as small but a relevant P source for rice production and could partly compensate plant P demand. Therefore, the P fertilization strategies should consider the P mobilization from Fe (oxyhydr)oxides in flooded paddy soils during rice growth. An increase in C availability for microorganisms in the rhizosphere intensifies P mobilization, which is especially critical at early stages of rice growth.

KW - Ferric iron reduction

KW - Land use in subtropics

KW - Phosphorus isotopes

KW - Phosphorus pools and availability

KW - Plant-microbial competition

KW - Redox potential

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