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
15-year fertilization increased soil organic carbon stock even in systems reputed to be saturated like permanent grassland on andosols
Louis-Axel Edouard Rambaut,Jonathan Vayssières,Antoine Versini,Paulo Salgado,Philippe Lecomte,Emmanuel Tillard +5 more
TL;DR: In this paper , the long-term effect of different types of fertilization on organic carbon (SOC) in grasslands was evaluated for 15 years in one arenosol site and in two andosols sites across a topo-sequence.
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Soil carbon dynamics following the transition of permanent pasture to cereal cropping: influence of initial soil fertility, lime application and nutrient addition
Elizabeth C. Coonan,Elizabeth C. Coonan,John A. Kirkegaard,Clive A. Kirkby,Craig L. Strong,Martin R. Amidy,Alan Richardson +6 more
TL;DR: Investigation of the impact of initial soil fertility and application of lime and nutrients on changes in soil carbon (C) during the transition from a permanent pasture to a crop demonstrated that loss of C from the pasture soils after cultivation was lower for soil with initially higher soil fertility when lime was applied, and that for soils with lower initial fertility, application of nutrients for crop growth reduced C mineralisation induced by lime application.
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Soil community structure and litter decomposition under irrigated Eucalyptus Globulus in South Western Australia
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TL;DR: The Albany Effluent Irrigated Tree Farm provided an opportunity to research plantation soil flora and fauna communities, rates of litter decomposition and to describe the impact of irrigation (both mains-water and effluent) on these communities as mentioned in this paper.
Elucidating carbon sources driving microbial metabolism during oil sands reclamation.
TL;DR: Correlation between cellular abundance estimates based on PLFA concentrations and the Δ14CPLFA indicated that the utilization of this more modern carbon was stimulating the microbial community at depth within the first pilot wetland reclamation project in the Alberta oil sands region.
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