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Title: Root contributions to long-term storage of soil organic carbon: theories, mechanisms and gaps
Contributor(s): Olupot, Giregon (author); Daniel, Heiko  (author); Lockwood, Peter  (author); McHenry, Melinda (author); McLeod, Malem Kerina (author)
Publication Date: 2010
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Abstract: The depth to which plants locate their roots has important but yet poorly understood implications with regard to the profile distribution and dynamics of soil organic carbon (SOC). We compared the profile distribution of fine root biomass (FRB) with depth distribution of SOC, based on data recalculated from published literature. Mechanisms through which roots might contribute to long-term storage of SOC were reviewed. There was general agreement across previous studies that over 60% of SOC were in the top 0.3 m of soil, where FRB was concentrated. However, studies in which depth distribution of SOC was simultaneously compared to profile distribution of RB were not readily available, suggesting that this area of research has received limited attention. There is a paucity of empirical evidence to lend support to theorised mechanisms through which roots stabilise SOC. The relationship between profile distribution of roots and depth distribution of SOC must be evaluated on-site for defined landuses. A standardised format for presenting results must be developed and agreed upon to ease interpretation of the results. National Soil Science Societies may have a significant role in this process and this 19th World Congress of Soil Science will be an opportune assembly for dialogue.
Publication Type: Conference Publication
Conference Details: 19th World Congress of Soil Science, Brisbane, Australia, 1st - 6th August, 2010
Source of Publication: Proceedings of the 19th World Congress of Soil Science: Soil Solutions for a Changing World, p. 112-115
Publisher: International Union of Soil Sciences and Australian Society of Soil Science Inc
Place of Publication: Brisbane, Australia
Field of Research (FOR): 050305 Soil Physics
050301 Carbon Sequestration Science
Socio-Economic Objective (SEO): 960904 Farmland, Arable Cropland and Permanent Cropland Land Management
960804 Farmland, Arable Cropland and Permanent Cropland Flora, Fauna and Biodiversity
Peer Reviewed: Yes
HERDC Category Description: E1 Refereed Scholarly Conference Publication
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