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
Comparing legumes for use in multiple cropping to enhance soil organic carbon, soil fertility, aggregates stability and vegetables yields under semi-arid conditions
TL;DR: Cowpea in multiple cropping was better for increasing SOC, soil fertility and crop yield of the subsequent crop than the use of fava bean, probably due to rhizodeposition processes, and could be regarded as a viable alternative for sustainable crop production under semi-arid conditions.
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Carbon dynamics in surface and deep soil in response to increasing litter addition rates in an agro-ecosystem
Tanvir Shahzad,Faiza Anwar,Sabir Hussain,Faisal Mahmood,Muhammad Arif,Amna Sahar,Muhammad Farrakh Nawaz,Nazia Perveen,Muhammad Sanaullah,Khadeeja Rehman,Muhammad Rashid,Muhammad Rashid +11 more
TL;DR: In this paper, the authors investigated the effect of maize litter on soil organic carbon (SOC) and showed that deep soil C would be more vulnerable to priming effect in response to litter addition than the surface soil.
55
Variable decomposition of two plant litters and their effects on the carbon sequestration ability of wetland soil in the Yangtze River estuary
TL;DR: In this article, the authors examined litter decomposition of Phragmites australis and Spartina alterniflora, two dominant plants from Jiuduansha wetland in the Yangtze River estuary, to clarify their effect on soil respiration and carbon sequestration efficiency.
54
Sources and priming of soil N2O and CO2 production: Nitrogen and simulated exudate additions
TL;DR: In this article, the effects of artificial root exudate (ARE) additions on the priming of soil organic matter (SOM) were examined and the authors found that adding ARE and urea alone alone caused positive priming effects; however, addition of urea and ARE concurrently resulted in an antagonistic interactive effect that diminished the N2O production derived from SOM mineralization.
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Strong shifts in microbial community structure are associated with increased litter input rather than temperature in High Arctic soils
TL;DR: In this article, a combined field and laboratory approach was used to study the microbial responses to increasing carbon input, in the form of plant litter, and temperature increase, in permafrost soils from northern Greenland.
54
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