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
Accelerated belowground C cycling in a managed agriforest ecosystem exposed to elevated carbon dioxide concentrations
TL;DR: In this paper, the effects of three elevated atmospheric CO2 levels on a Populus deltoides plantation at Biosphere 2 Laboratory in Oracle Arizona were investigated, and the authors found that soil carbon content decreased as CO2 in the atmosphere increased and inputs of new carbon were not found in SOM.
89
Greenhouse Gases and Ammonia Emissions from Organic Mixed Crop-Dairy Systems: A Critical Review of Mitigation Options
S. M. Novak,J. L. Fiorelli +1 more
TL;DR: In this article, the authors present a review of agricultural practices that mitigate greenhouse gas and ammonia emissions in organic dairy farms in northern Europe such as organic mixed crop-dairy systems.
Carbon and trace element mobility in an urban soil amended with green waste compost
TL;DR: In this paper, the authors evaluated the mobility of trace metals and arsenic through an urban soil following amendment with green waste compost over an annual cycle and found that period of high rainfall enhanced As mobility through upper soil horizons to deeper technogenic layers with higher pH.
88
Priming of soil organic matter decomposition scales linearly with microbial biomass response to litter input in steppe vegetation
TL;DR: In this paper, a large field litter manipulation experiment in Mongolian steppe was conducted, and the authors showed that priming intensifies with increasing litter inputs, but at a decreasing efficiency.
Plant carbon inputs and environmental factors strongly affect soil respiration in a subtropical forest of southwestern China
TL;DR: In this article, the chemical and biological effects of aboveground litterfall denial, root trenching and tree-stem girdling were investigated for three years in plots where those treatments were applied singly and in combination.
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