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
Synergistic and antagonistic interactions among organic amendments of contrasted stability, nutrient availability and soil organic matter in the regulation of C mineralisation
TL;DR: In this article, the effects of adding stabilised or unstabilised manures combined with mineral nutrients (N-NO 3, P-PO 4, K and S-SO 4 ) on carbon mineralisation in two agricultural (sandy loam) soils with contrasted organic matter stocks and N availability were investigated.
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Frequency of stover mulching but not amount regulates the decomposition pathways of soil micro-foodwebs in a no-tillage system
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TL;DR: In this article, the authors investigated the responses of the soil micro-foodweb to maize stover mulching amounts (33% and 67% of the stover remaining at harvest) and frequencies (high frequency had continuous mulching every year; low frequency had mulch applied once every three years) during a 10-year experiment in a no-tillage system.
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The High Input of Soil Organic Matter from Dead Tree Fine Roots into the Forest Soil
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