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
Short-Term Dynamics of the Active and Passive Soil Organic Carbon Pools in a Volcanic Soil Treated With Fresh Organic Matter
Wilfredo A. Dumale,Tsuyoshi Miyazaki,Taku Nishimura,Katsutoshi Seki,Nueva Vizcaya +4 more
- 01 Jan 2011
TL;DR: In a 110-day constant temperature experiment (20°C) as mentioned in this paper, the authors determined the effect of fresh organic matters (FOM): 0 (control); 1.81 g leaf litter (LL) carbon kg -1 ; and 2.12 g chicken manure (CM) carbon -1 in the stable soil organic carbon [mineral-associated organic carbon (MAOC), stable soil microbial biomass carbon (SMBC), and carbon dioxide (CO2) evolution of a volcanic ash soil from Tsumagoi, Gunma Prefecture, Japan (138°30
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Colonization of a Deglaciated Moraine: Contrasting Patterns of Carbon Uptake and Release from C3 and CAM Plants
TL;DR: Soil analysis did not reveal significant differences in carbon accumulation of the two plant communities, suggesting that processes often neglected, like lateral flows and winter respiration, can have a similar relevance as NEE in the determination of the Net Ecosystem Carbon Balance.
Tillage, Cover Crop and Nitrogen Fertilization Effects on Soil Microbial Carbon Dynamics under Long-term Cotton Production
Molefi Jacob Mpheshea
- 01 Jan 2014
TL;DR: In this article, the effect of agronomic practices including tillage (no-till and tilled), cover crops (no cover, hairy vetch - Vicia villosa L, and winter wheat - Triticum aestivum) and different N fertilizer rates ( 0, 34 and 101 kg N per hectare ) on soil microbial C dynamics as measured by soil microbial biomass C (SMBC) along with soil microbial respiration over the 2013 cotton growing season at Jackson, West Tennessee.
Effect of nitrogen and phosphorus addition on soil aggregation and its associated organic carbon
TL;DR: In this paper, the effects of N and P addition on soil aggregates were investigated and the response of plant productivity and soil biogeochemical processes to nutrient addition has been widely investigated.
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