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
Responses of Soil Carbon Pools, Enzymatic Activity, and Crop Yields to Nitrogen and Straw Incorporation in a Rice-Wheat Cropping System in North-Western India
Sandeep Sharma,Pritpal Singh,Sandeep Kumar +2 more
- 04 Nov 2020
TL;DR: In this paper, a field experiment was established to study the effect of fertilizer-N application and rice straw incorporation on crop productivity due to changes in total organic carbon (TOC), its labile pools and the soil enzymatic activity.
Increased litter input increases litter decomposition and soil respiration but has minor effects on soil organic carbon in subtropical forests
TL;DR: In this paper, the effects of changes in litter quantity and quality on litter decomposition, soil respiration, and soil organic carbon (SOC) in subtropical forests were investigated.
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Water limitation and plant inter-specific competition reduce rhizosphere-induced C decomposition and plant N uptake
TL;DR: In this paper, the simple and interactive effects of plant diversity and water availability on rhizosphere-mediated soil organic matter decomposition and plant N uptake were tested in the greenhouse with five semi-arid grassland species and two water levels (15 and 20% gravimetric soil moisture content).
76
Effects of plant-derived dissolved organic matter (DOM) on soil CO2 and N2O emissions and soil carbon and nitrogen sequestrations
TL;DR: In this paper, the impacts of crop residue-derived DOM on soil CO2 and N2O emissions, as well as soil carbon and nitrogen sequestration by adding water extracts of maize stalk to soils were investigated.
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Soil organic matter dynamics in a North America tallgrass prairie after 9 yr of experimental warming
TL;DR: In this paper, the influence of global warming on soil organic matter (SOM) dynamics in terrestrial ecosystems remains unclear, and the authors combined soil fractionation with isotope analyses to examine SOM dynamics after nine years of experimental warming in a North America tallgrass prairie.
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