Environmental Monitoring and Assessment

, Volume 185, Issue 10, pp 8659–8671 | Cite as

Influence of elevated carbon dioxide and temperature on belowground carbon allocation and enzyme activities in tropical flooded soil planted with rice

  • P. BhattacharyyaEmail author
  • K. S. Roy
  • S. Neogi
  • M. C. Manna
  • T. K. Adhya
  • K. S. Rao
  • A. K. Nayak


Changes in the soil labile carbon fractions and soil biochemical properties to elevated carbon dioxide (CO2) and temperature reflect the changes in the functional capacity of soil ecosystems. The belowground root system and root-derived carbon products are the key factors for the rhizospheric carbon dynamics under elevated CO2 condition. However, the relationship between interactive effects of elevated CO2 and temperature on belowground soil carbon accrual is not very clear. To address this issue, a field experiment was laid out to study the changes of carbon allocation in tropical rice soil (Aeric Endoaquept) under elevated CO2 and elevated CO2 + elevated temperature conditions in open top chambers (OTCs). There were significant increase of root biomass by 39 and 44 % under elevated CO2 and elevated CO2 + temperature compared to ambient condition, respectively. A significant increase (55 %) of total organic carbon in the root exudates under elevated CO2 + temperature was noticed. Carbon dioxide enrichment associated with elevated temperature significantly increased soil labile carbon, microbial biomass carbon, and activities of carbon-transforming enzyme like β-glucosidase. Highly significant correlations were noticed among the different soil enzymes and soil labile carbon fractions.


Rice soil Elevated CO2 Elevated temperature Open top chambers Microbial biomass carbon Root exudates 



The work has been partially supported by the grant of ICAR-NAIP, Component-4 (2031), “Soil organic C dynamics vis-à-vis anticipatory climatic changes and crop adaptation strategies”. Some portion of result is the PhD work of Mr. K. S. Roy. Authors are thankful to CAC members, Dr. D. C. Uprety, Dr. S. N. Singh, and Dr. V. R. Rao for their valuable guidance and suggestions. Technical support provided by the technical staff of the division of Crop Production in maintaining the OTCs and laboratory experiments and data collection is gratefully acknowledged.


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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • P. Bhattacharyya
    • 1
    Email author
  • K. S. Roy
    • 1
  • S. Neogi
    • 1
  • M. C. Manna
    • 2
  • T. K. Adhya
    • 1
  • K. S. Rao
    • 1
  • A. K. Nayak
    • 1
  1. 1.Soil science and Microbiology, Division of Crop ProductionCentral Rice Research InstituteCuttackIndia
  2. 2.Division of Soil BiologyIndian Institute of soil scienceBhopalIndia

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