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Zea mays rhizosphere respiration, but not soil organic matter decomposition was stable across a temperature gradient

Vicca, Sara, Janssens, Ivan, Wong, Suan-Chin, Cernusak, Lucas and Farquhar, G.D. (2010). Zea mays rhizosphere respiration, but not soil organic matter decomposition was stable across a temperature gradient. Soil Biology and Biochemistry,42(11):2030-2033.

Document type: Journal Article
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IRMA ID 81704288xPUB448
Title Zea mays rhizosphere respiration, but not soil organic matter decomposition was stable across a temperature gradient
Author Vicca, Sara
Janssens, Ivan
Wong, Suan-Chin
Cernusak, Lucas
Farquhar, G.D.
Journal Name Soil Biology and Biochemistry
Publication Date 2010
Volume Number 42
Issue Number 11
ISSN 0038-0717   (check CDU catalogue open catalogue search in new window)
Scopus ID 2-s2.0-77956783814
Start Page 2030
End Page 2033
Total Pages 4
Place of Publication United Kingdom
Publisher Pergamon Press
Field of Research 1111 - Nutrition and Dietetics
HERDC Category C1 - Journal Article (DIISR)
Abstract In a greenhouse experiment, we grew maize plants at different densities. We added fertilizer to half of the pots and created a temperature gradient. After 10 weeks of plant growth, we measured soil CO2 efflux (SCE) and determined rhizosphere respiration (Rrhizo) and the decomposition rate of soil organic matter (RSOM) using the different δ13C of the C3 soil and C4 plants. Whereas Rrhizo remained stable across the temperature gradient, RSOM significantly increased with growth temperature. Neither plant density, nor the fertilizer treatment affected the relation between Rrhizo or RSOM and growth temperature. Although Rrhizo might still increase with temperature in the short term, long term exposure to higher temperatures revealed full thermal acclimation of Rrhizo, but not of RSOM.
Keywords Rhizosphere respiration
Soil CO2 efflux
Soil organic matter decomposition
Stable carbon isotopes
Temperature gradient
Thermal acclimation
DOI http://dx.doi.org/10.1016/j.soilbio.2010.07.023   (check subscription with CDU E-Gateway service for CDU Staff and Students  check subscription with CDU E-Gateway in new window)
 
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Created: Fri, 29 Aug 2014, 17:28:12 CST by Anthony Hornby