Journal Article10.1111/J.1461-0248.2004.00579.X
Carbon input to soil may decrease soil carbon content
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TL;DR: In this article, a negative relationship between primary production and soil carbon (C) content is found, and the authors conclude that energy available to soil microbes and microbial competition are important determinants of soil C decomposition.
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Abstract: It is commonly predicted that the intensity of primary production and soil carbon (C) content are positively linked. Paradoxically, many long-term field observations show that although plant litter is incorporated to soil in large quantities, soil C content does not necessarily increase. These results suggest that a negative relationship between C input and soil C conservation exists. Here, we demonstrate in controlled conditions that the supply of fresh C may accelerate the decomposition of soil C and induce a negative C balance. We show that soil C losses increase when soil microbes are nutrient limited. Results highlight the need for a better understanding of microbial mechanisms involved in the complex relationship between C input and soil C sequestration. We conclude that energy available to soil microbes and microbial competition are important determinants of soil C decomposition.
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Citations
Mechanisms of real and apparent priming effects and their dependence on soil microbial biomass and community structure: critical review
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Fungi mediate long term sequestration of carbon and nitrogen in soil through their priming effect
Sébastien Fontaine,Catherine Hénault,A. Aamor,N. Bdioui,Juliette M. G. Bloor,Vincent Maire,Bruno Mary,Sandrine Revaillot,Pierre-Alain Maron +8 more
TL;DR: The results support the existence of a bank mechanism that regulates nutrient and carbon sequestration in soil: PE is low when nutrients availability is high, allowing sequestration of nutrients and carbon; in contrast, microbes release nutrients from SOM when nutrient availability is low.
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References
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M. J. Swift,O. W. Heal,J. M. Anderson +2 more
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The priming effect of organic matter: a question of microbial competition
TL;DR: In this paper, the authors build a conceptual model of the priming effect based on the contradictory results available in the literature adopting the concept of nutritional competition, and they postulate that priming results from the competition for energy and nutrient acquisition between the microorganisms specialized in the decomposition of fresh organic matter and those feeding on polymerised SOM.
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Structure and Organic Matter Storage in Agricultural Soils
M.R. Carter,B. A. Stewart +1 more
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TL;DR: In this article, the authors present an analysis of Soil organic matter storage in Agroecosystems. But their focus is on the storage of organic matter in Soil Fraction and Aggregates.
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