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
Amazon Forest Ecosystem Responses to Elevated Atmospheric CO2 and Alterations in Nutrient Availability: Filling the Gaps with Model-Experiment Integration
Florian Hofhansl,Kelly M. Andersen,Katrin Fleischer,Katrin Fleischer,Lucia Fuchslueger,Anja Rammig,Anja Rammig,Karst J. Schaap,Oscar J. Valverde-Barrantes,David M. Lapola +9 more
TL;DR: In this paper, the authors present two ecosystem-scale manipulation experiments, to be carried out in the Amazon, that examine tropical ecosystem responses to eCO2 and nutrient addition and thus will elucidate the representation of crucial ecological processes by ecosystem models.
Priming Effect and Respiratory Quotient in a Forest Soil Amended with Glucose
Oliver Dilly,A. M. Zyakun +1 more
TL;DR: It is concluded that priming effect of the C3-plant derived soil organic matter and soil respiratory quotient value were increased simultaneously and effects were correlated to the glucose rate.
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Nitrogen availability mediates the priming effect of soil organic matter by preferentially altering the straw carbon-assimilating microbial community
TL;DR: In this paper , a 56-day incubation was conducted to determine the dynamics of priming effects and the underlying microbial mechanisms after straw and/or mineral N addition to three soils with contrasting cultivation and fertilization histories, i) unfertilized soil, ii) 8 years farmyard manure amended soil (Manured), iii) abandoned cropland soil (Abandoned).
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Long-term litter input manipulation effects on production and properties of dissolved organic matter in the forest floor of a Norway spruce stand
Thimo Klotzbücher,Thimo Klotzbücher,Klaus Kaiser,Christoph Stepper,E. Emiel van Loon,Pedro Gerstberger,Karsten Kalbitz +6 more
TL;DR: In this paper, the authors studied how dissolved organic matter (DOM) in forest floors responded to six years of litter fall manipulation at a spruce site, and found that increased litter input changes organic matter decomposition, thus affecting fluxes and properties of DOM within forest floors.
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Soil carbon balance by priming differs with single versus repeated addition of glucose and soil fertility level
Lei Wu,Hu Xu,Qiong Xiao,Yaping Huang,Memon Muhammad Suleman,Ping Zhu,Yakov Kuzyakov,Xingliang Xu,Minggang Xu,Wenju Zhang +9 more
TL;DR: In this paper, the effects of single versus repeated additions of 13C-labeled glucose (with added 13C corresponding to 2% of soil organic C content) to five soils with increasing fertility level on the intensity of priming effect and soil C balance were evaluated.
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