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Title: How do microaggregates stabilize soil organic matter?
Contributor(s): Fazle Rabbi, Sheikh Mohammad  (author); Lockwood, Peter V  (author); Daniel, Heiko  (author)
Publication Date: 2010
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Abstract: Microaggregates play a key role to protect soil organic matter (SOM) from microbial decomposition. Several physical, physico-chemical and biochemical mechanisms have been proposed to describe the SOM stabilization in soil. However, no scientific consensus exists about a range of hypotheses. The aim of this review is to consolidate common notions and hypotheses on physical and physico-chemical protection mechanisms. The key notion of physical protection is exclusion of microbes and enzymes from microaggregate pores. Recent investigations showed higher microbial diversity and presence of accessible pore networks in microaggregates. The physico-chemical protection mechanism is more robust but monolayer or patchy adsorption of SOM onto clay surfaces requires further detailed research. The adsorption of SOM and exo-enzymes on pore walls and clay surfaces has been identified as a plausible concept of SOM stabilization.
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. 109-112
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
Peer Reviewed: Yes
HERDC Category Description: E1 Refereed Scholarly Conference Publication
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