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
Litter input controls on soil carbon in a temperate deciduous forest
Richard D. Bowden,Lauren Deem,Alain F. Plante,Clément Peltre,Knute J. Nadelhoffer,Kate Lajtha +5 more
TL;DR: In this article, the importance of leaves and roots on soil C and soil organic matter (SOM) quantity and quality were measured in a temperate deciduous forest for 20 years.
Enhancing Soil Carbon Sequestration with C-Rich Carrier Materials from Spent Mushroom Substrate and Composted Wheat Straw: Implications for Smart Fertilizer Design
Marcela Calabi-Floody,Jorge Medina,Alan E. Richardson,María Javiera Guarda-Reyes,Pamela Villegas-Pizarro,Isidora Zirotti-Lecaros,Lizeth Mora-Pérez,Humberto Aponte,Heike Knicker,Cornélia Rumpel,Marı́a de la Luz Mora +10 more
TL;DR: This study evaluates C-rich carrier materials from spent mushroom substrate and composted wheat straw for enhancing soil carbon stabilization, finding that spent mushroom substrate and low-rate composted wheat straw application can increase soil organic carbon sequestration and support climate-smart agriculture goals.
On the 'temperature sensitivity' of soil respiration: Can we use the immeasurable to predict the unknown?
Jens-Arne Subke,Michael Bahn +1 more
TL;DR: It is shown that it is impossible to measure actual temperature response of RS, and that a range of confounding effects creates the observed apparent temperature relations reported in the literature, which means any measureable temperature response function will likely fail to predict effects of climate change on Rs.
An agricultural practise with climate and food security benefits: "Claying" with kaolinitic clay subsoil decreased soil carbon priming and mineralisation in sandy cropping soils
Samantha Grover,Clayton R. Butterly,Xiaojuan Wang,Deirdre B. Gleeson,Lynne M. Macdonald,David J. M. Hall,Caixian Tang +6 more
TL;DR: This research demonstrates long-term changes in carbon-cycling that could promote greater carbon sequestration in soils and reduce CO2 emissions from plant residues and soil organic matter in a sandy soil.
Changes in labile soil organic matter fractions following land use change from monocropping to poplar-based agroforestry systems in a semiarid region of Northeast China
TL;DR: The results suggest that labile SOM fractions respond sensitively to poplar-based agroforestry practices and can provide early information about the changes in SOM in semiarid regions of Northeast China and highlight that the effects of agroForestry practices on labiles SOM fractions vary with soil texture.
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