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
Changes in soil microbial biomass and community structure with addition of contrasting types of plant litter in a semiarid grassland ecosystem
TL;DR: Wang et al. as discussed by the authors investigated how quality and quantity of plant litter inputs would affect soil microorganisms and consequently C turnover, and showed that both quality and quantities of belowground litter are involved in affecting soil microbial community structure in semiarid grassland ecosystem.
Mechanisms and implications of bacterial–fungal competition for soil resources
Chaoqun Wang,Yakov Kuzyakov +1 more
TL;DR: Competition for resources between bacteria and fungi in soil is the main factor determining their adaptation and niche differentiation. Bacteria are more efficient in utilizing simple substrates, while fungi are more effective in utilizing complex compounds. This competition will increase under global change impacts.
83
Soil organic carbon (SOC) dynamics with and without residue incorporation in relation to different nitrogen fertilisation rates
TL;DR: In this paper, a long-term experiment in north-eastern Italy that started in 1966 and is still ongoing, where residue incorporation is compared with residue removal, over a range of mineral N fertilisations.
82
Long-term effects of elevated CO2 on carbon and nitrogen functional capacity of microbial communities in three contrasting soils
Clayton R. Butterly,Lori A. Phillips,Jennifer L. Wiltshire,Ashley E. Franks,Roger Armstrong,Deli Chen,Pauline M. Mele,Caixian Tang +7 more
TL;DR: In this article, the authors examined whether these plant-mediated processes indirectly influence the structure and function of soil microbial communities and soil carbon (C) and nitrogen (N) cycling.
Priming of soil organic carbon by malic acid addition is differentially affected by nutrient availability
TL;DR: In this paper, the effect of nutrient availability, and soil carbon quality and quantity on the priming effect (PE) resulting from malic acid in a short term (seven day) soil incubation experiment was investigated.
81
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