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
Rapid turnover of organic acids in a Dystric Brunisol under a spruce–lichen forest in northern Saskatchewan, Canada
TL;DR: Fujii et al. as discussed by the authors examined soil solution composition and mineralization kinetics of 14C-radiolabelled oxalate and citrate to quantify the C fluxes from organic acid mineralization in a Dystric Brunisol under a spruce-lichen forest in northern Saskatchewan.
15
Rhizosphere priming effects differ between Norway spruce (Picea abies) and Scots pine seedlings cultivated under two levels of light intensity
TL;DR: In this article, the root exudation rate, soil organic matter decomposition, gross N mineralization, and rhizosphere priming effect were investigated in the presence of growing plant roots, and it was found that spruce induced a positive RPE while pine induced a negative RPE.
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Soil metatranscriptome demonstrates a shift in C, N, and S metabolisms of a grassland ecosystem in response to elevated atmospheric CO2
David Rosado-Porto,Stefan Ratering,Gerald Moser,Marianna Deppe,Christoph Müller,Sylvia Schnell +5 more
TL;DR: In this article , a functional metatranscriptomics approach (cDNA from mRNA) was used to study the effects of eCO2 on the transcript abundance of C, N, and S cycles, and the soil microbiome.
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Wetland conversion to cropland alters the microbes along soil profiles and over seasons
Xinhao Zhu,Fenghui Yuan,Liyuan He,Ziyu Guo,Nannan Wang,Yunjiang Zuo,Jianzhao Liu,Kexin Li,Yihui Wang,Ying Sun,X. Y. Zhang,Changchun Song,Yanyu Song,Chao Gong,Yowhan Son,Dufa Guo,Xiaofeng Xu +16 more
TL;DR: Wang et al. as discussed by the authors evaluated the impacts of wetland reclamation on microbes along soil profiles and over seasons, soil cores (0-100 cm) were collected from a natural wetland and an adjacent cropland that has been continuously cultivated for 23 years in the Sanjiang Plain, northeastern China.
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