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
Soil Respiration in European Grasslands in Relation to Climate and Assimilate Supply
Michael Bahn,Mirco Rodeghiero,Margaret Anderson-Dunn,Sabina Dore,Cristina Gimeno,Matthias Drösler,Michael Williams,Christof Ammann,Frank Berninger,Chris Flechard,Stephanie K. Jones,Manuela Balzarolo,Suresh Kumar,Christian Newesely,Tibor Priwitzer,Antonio Raschi,Rolf T. W. Siegwolf,Sanna Susiluoto,John Tenhunen,Georg Wohlfahrt,Alexander Cernusca +20 more
TL;DR: Temperature was a suitable surrogate for deriving estimates of annual Rs and temperature-independent seasonal fluctuations of Rs of an intensively managed pasture were closely related to changes in leaf area index (LAI), indicating that assimilate supply overrides potential acclimation to prevailing temperatures.
Nutrient availability limits carbon sequestration in arable soils
Clive A. Kirkby,Clive A. Kirkby,Alan Richardson,Leonard Wade,John B. Passioura,Graeme Batten,Christopher Blanchard,John A. Kirkegaard +7 more
TL;DR: In this paper, the authors show that conversion of straw into new fine fraction SOM (FF-SOM) is increased by up to threefold by augmenting the residues with supplementary nutrients.
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Environmental change and carbon limitation in trees: a biochemical, ecophysiological and ecosystem appraisal.
TL;DR: It is concluded that the growth of trees is not C-limited, with the key to understanding future responses to climate change being turnover of soil organic matter and nutrient cycling.
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Soil organic matter formation, persistence, and functioning: A synthesis of current understanding to inform its conservation and regeneration
TL;DR: In this paper , the processes and drivers of SOM formation and persistence within a coherent state-of-the-art framework are presented. And the specific properties of SOM which influence its contributions to these contributions are discussed, with implications for SOM conservation and regeneration to promote desired outcomes.
293
Can N2O emissions offset the benefits from soil organic carbon storage
Bertrand Guenet,Benoit Gabrielle,Claire Chenu,Dominique Arrouays,Jérôme Balesdent,Martial Bernoux,Elisa Bruni,Jean-Pierre Caliman,Rémi Cardinael,Songchao Chen,Philippe Ciais,Dominique Desbois,Julien Fouché,Stefan Frank,Catherine Hénault,Emanuele Lugato,Victoria Naipal,Thomas Nesme,Michael Obersteiner,Sylvain Pellerin,David S. Powlson,Daniel P. Rasse,Frédéric Rees,Jean-François Soussana,Yang Su,Hanqin Tian,Hugo Valin,Feng Zhou +27 more
TL;DR: In this paper, the main agricultural management options for increasing soil organic carbon (SOC) stocks are reviewed and the amount of SOC that can be stored as well as resulting changes in N2 O emissions to better estimate the climate benefits of these management options.
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