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
Mineralization of plant residues and native soil carbon as affected by soil fertility and residue type
TL;DR: In this article, a 360-day laboratory incubation experiment was carried out with a Cambisol of low and high fertilities amended with three types of 13C-labeled maize residues (root, stem, leaf).
51
Fertilization alters microbial community composition and functional patterns by changing the chemical nature of soil organic carbon: A field study in a Halosol
Hongyan Wang,Ying Nie,Ying Nie,Clayton R. Butterly,Lei Wang,Lei Wang,Qiuhui Chen,Wei Tian,Bingbing Song,Yunguan Xi,Yu Wang +10 more
TL;DR: In this article, the effects of fertilizer on soil organic carbon (C) content and composition, and on microbial community and functions related to C decomposition are being gained, although the linkage between them remains elusive.
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A parsimonious modular approach to building a mechanistic belowground carbon and nitrogen model
TL;DR: A parsimonious, modular C and N cycle model, the Dual Arrhenius Michaelis‐Menten‐Microbial Carbon and Nitrogen Phyisology (DAMM‐MCNiP), that generates testable hypotheses regarding the effect of temperature, moisture, and substrate supply on C andN cycling is developed and applied to explain an observed seasonal hysteresis in the relationship between respiration and temperature.
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Soil C:N stoichiometry controls carbon sink partitioning between above-ground tree biomass and soil organic matter in high fertility forests
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TL;DR: It is suggested that, at high fertility sites, plant N demand interacts with soil C:N stoichiometry and microbial activity, resulting in higher allocation of C to above ground tree biomass with increasing soil C-N ratio, which can promote tree growth and ecosystem C sink allocation in aboveground biomass.
Soil carbon dioxide flux, carbon sequestration and crop productivity in a tropical dryland agroecosystem: influence of organic inputs of varying resource quality.
TL;DR: In this article, the impact of manipulation of the quality of exogenous inputs on soil CO 2 -C flux was studied in rice-barley annual rotation tropical dryland agroecosystem Chemical fertilizer, Sesbania shoot (high quality resources), wheat straw (low quality resource), Sesania Â+wheat straw (high+low quality), all carrying equivalent recommended dose of N, were added to soil A distinct seasonal variation in CO 2 c flux was recorded in all treatments, flux being higher during rice period, and much reduced during barley and summer fall
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