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 Carbon: The Rhizosphere Priming Effect and Second Generation Biofuels
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- 01 Jan 2019
TL;DR: Forbush et al. as discussed by the authors measured root and soil respiration in the field during a 48-hour period and found that greater root biomass at the end of the infield incubation was associated with higher priming effects.
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TL;DR: In this article , the authors compare the results of three different types of models under the same mitigation scenario (RCP2) consistent with a 2°C temperature target, and highlight the uncertainty in rapidly scaling up biomass energy supply, especially in dry tropical climates and in regions where future climate change could result in drier conditions.
Benefits and trade-offs of soil organic carbon sequestration
08 Nov 2022
TL;DR: In this paper , the authors present the biophysical and socioeconomic benefits and trade-offs of soil carbon sequestration and show that they are specific with regards to different organic matter types.
2
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