Rice rhizodeposition and carbon stabilisation in paddy soil are regulated via drying-rewetting cycles and nitrogen fertilisation

Research output: Contribution to journalArticleResearchpeer review

Authors

  • Cornelius Talade Atere
  • Tida Ge
  • Zhenke Zhu
  • Chengli Tong
  • Davey L. Jones
  • Olga Shibistova
  • Georg Guggenberger
  • Jinshui Wu

External Research Organisations

  • Chinese Academy of Sciences (CAS)
  • Bangor University
  • Russian Academy of Sciences (RAS)
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Details

Original languageEnglish
Pages (from-to)407-417
Number of pages11
JournalBiology and fertility of soils
Volume53
Issue number4
Publication statusPublished - 22 May 2017

Abstract

This study aimed to better understand the stabilisation of rice rhizodeposition in paddy soil under the interactive effects of different N fertilisation and water regimes. We continuously labelled rice (‘Zhongzao 39’) with 13CO2 under a combination of different water regimes (alternating flooding-drying vs. continuous flooding) and N addition (250 mg N kg−1 urea vs. no addition) and then followed 13C incorporation into plant parts as well as soil fractions. N addition increased rice shoot biomass, rhizodeposition, and formation of 13C (new plant-derived C) in the rhizosphere soils under both water regimes. By day 22, the interaction of alternating flooding-drying and N fertilisation significantly increased shoot and root 13C allocations by 17 and 22%, respectively, over the continuous flooding condition. The interaction effect also led to a 46% higher 13C allocation to the rhizosphere soil. Alone, alternating water management increased 13C deposition by 43%. In contrast, N addition increased 13C deposition in rhizosphere soil macroaggregates under both water regimes, but did not foster macroaggregation itself. N treatment also increased 13C deposition and percentage in microaggregates and in the silt and clay-size fractions of the rhizosphere soil, a pattern that was higher under the alternating condition. Overall, our data indicated that combined N application and a flooding-drying treatment stabilised rhizodeposited C in soil more effectively than other tested conditions. Thus, they are desirable practices for improving rice cropping, capable of reducing cost, increasing water use efficiency, and raising C sequestration.

Keywords

    C continuous labelling, Carbon stabilisation, Paddy soils, Recent assimilates, Rhizodeposition, Root exudation

ASJC Scopus subject areas

Cite this

Rice rhizodeposition and carbon stabilisation in paddy soil are regulated via drying-rewetting cycles and nitrogen fertilisation. / Atere, Cornelius Talade; Ge, Tida; Zhu, Zhenke et al.
In: Biology and fertility of soils, Vol. 53, No. 4, 22.05.2017, p. 407-417.

Research output: Contribution to journalArticleResearchpeer review

Atere CT, Ge T, Zhu Z, Tong C, Jones DL, Shibistova O et al. Rice rhizodeposition and carbon stabilisation in paddy soil are regulated via drying-rewetting cycles and nitrogen fertilisation. Biology and fertility of soils. 2017 May 22;53(4):407-417. doi: 10.1007/s00374-017-1190-4
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title = "Rice rhizodeposition and carbon stabilisation in paddy soil are regulated via drying-rewetting cycles and nitrogen fertilisation",
abstract = "This study aimed to better understand the stabilisation of rice rhizodeposition in paddy soil under the interactive effects of different N fertilisation and water regimes. We continuously labelled rice ({\textquoteleft}Zhongzao 39{\textquoteright}) with 13CO2 under a combination of different water regimes (alternating flooding-drying vs. continuous flooding) and N addition (250 mg N kg−1 urea vs. no addition) and then followed 13C incorporation into plant parts as well as soil fractions. N addition increased rice shoot biomass, rhizodeposition, and formation of 13C (new plant-derived C) in the rhizosphere soils under both water regimes. By day 22, the interaction of alternating flooding-drying and N fertilisation significantly increased shoot and root 13C allocations by 17 and 22%, respectively, over the continuous flooding condition. The interaction effect also led to a 46% higher 13C allocation to the rhizosphere soil. Alone, alternating water management increased 13C deposition by 43%. In contrast, N addition increased 13C deposition in rhizosphere soil macroaggregates under both water regimes, but did not foster macroaggregation itself. N treatment also increased 13C deposition and percentage in microaggregates and in the silt and clay-size fractions of the rhizosphere soil, a pattern that was higher under the alternating condition. Overall, our data indicated that combined N application and a flooding-drying treatment stabilised rhizodeposited C in soil more effectively than other tested conditions. Thus, they are desirable practices for improving rice cropping, capable of reducing cost, increasing water use efficiency, and raising C sequestration.",
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note = "Funding information: This study was financially supported by the National Natural Science Foundation of China (41671292; 41371304), the Strategic Priority Research Program of the Chinese Academy of Sciences (XDB15020401), the Royal Society Newton Advanced Fellowship (NA150182), and the Recruitment Program of High-end Foreign Experts of the State Administration of Foreign Experts Affairs, awarded to Prof. Georg Guggenberger (GDT20164300013), Public Service Technology Center, Institute of Subtropical Agriculture, Chinese Academy of Sciences. Also, Mr. Cornelius T. Atere acknowledges the PhD training grant from the Nigerian Tertiary Education Trust Fund through the Obafemi Awolowo University, Ile-Ife, Nigeria.",
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TY - JOUR

T1 - Rice rhizodeposition and carbon stabilisation in paddy soil are regulated via drying-rewetting cycles and nitrogen fertilisation

AU - Atere, Cornelius Talade

AU - Ge, Tida

AU - Zhu, Zhenke

AU - Tong, Chengli

AU - Jones, Davey L.

AU - Shibistova, Olga

AU - Guggenberger, Georg

AU - Wu, Jinshui

N1 - Funding information: This study was financially supported by the National Natural Science Foundation of China (41671292; 41371304), the Strategic Priority Research Program of the Chinese Academy of Sciences (XDB15020401), the Royal Society Newton Advanced Fellowship (NA150182), and the Recruitment Program of High-end Foreign Experts of the State Administration of Foreign Experts Affairs, awarded to Prof. Georg Guggenberger (GDT20164300013), Public Service Technology Center, Institute of Subtropical Agriculture, Chinese Academy of Sciences. Also, Mr. Cornelius T. Atere acknowledges the PhD training grant from the Nigerian Tertiary Education Trust Fund through the Obafemi Awolowo University, Ile-Ife, Nigeria.

PY - 2017/5/22

Y1 - 2017/5/22

N2 - This study aimed to better understand the stabilisation of rice rhizodeposition in paddy soil under the interactive effects of different N fertilisation and water regimes. We continuously labelled rice (‘Zhongzao 39’) with 13CO2 under a combination of different water regimes (alternating flooding-drying vs. continuous flooding) and N addition (250 mg N kg−1 urea vs. no addition) and then followed 13C incorporation into plant parts as well as soil fractions. N addition increased rice shoot biomass, rhizodeposition, and formation of 13C (new plant-derived C) in the rhizosphere soils under both water regimes. By day 22, the interaction of alternating flooding-drying and N fertilisation significantly increased shoot and root 13C allocations by 17 and 22%, respectively, over the continuous flooding condition. The interaction effect also led to a 46% higher 13C allocation to the rhizosphere soil. Alone, alternating water management increased 13C deposition by 43%. In contrast, N addition increased 13C deposition in rhizosphere soil macroaggregates under both water regimes, but did not foster macroaggregation itself. N treatment also increased 13C deposition and percentage in microaggregates and in the silt and clay-size fractions of the rhizosphere soil, a pattern that was higher under the alternating condition. Overall, our data indicated that combined N application and a flooding-drying treatment stabilised rhizodeposited C in soil more effectively than other tested conditions. Thus, they are desirable practices for improving rice cropping, capable of reducing cost, increasing water use efficiency, and raising C sequestration.

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KW - Carbon stabilisation

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KW - Recent assimilates

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