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
Soil priming effect and its responses to nutrient addition along a tropical forest elevation gradient.
Jiguang Feng,Mao Tang,Biao Zhu +2 more
TL;DR: In this article, a conceptual framework linking stoichiometric decomposition and nutrient mining hypotheses was proposed, in which the former dominates in low-nutrient availability soils and the latter dominates in high-nutrients availability soils.
102
Grass invasion of a hardwood forest is associated with declines in belowground carbon pools
TL;DR: In this article, the authors examined how Microstegium vimineum affects belowground C-cycling in a southeastern US forest and found that the grass invasion accelerates the C-glucose respired more rapidly in invaded plots.
Investigating the biochar effects on C‐mineralization and sequestration of carbon in soil compared with conventional amendments using the stable isotope (δ13C) approach
Balal Yousaf,Balal Yousaf,Guijian Liu,Guijian Liu,Ruwei Wang,Qumber Abbas,Muhammad Imtiaz,Ruijia Liu +7 more
TL;DR: In this paper, a stable carbon isotope (δ13C) approach was used to estimate the possible biochar effects on native soil C-mineralization compared with various BW additions and potential carbon sequestration.
101
More replenishment than priming loss of soil organic carbon with additional carbon input
Junyi Liang,Junyi Liang,Zhenghu Zhou,Changfu Huo,Zheng Shi,James R. Cole,Lei Huang,Konstantinos T. Konstantinidis,Xiaoming Li,Bo Liu,Zhongkui Luo,C. Ryan Penton,Edward A. G. Schuur,James M. Tiedje,Ying-Ping Wang,Liyou Wu,Jianyang Xia,Jizhong Zhou,Jizhong Zhou,Jizhong Zhou,Yiqi Luo,Yiqi Luo,Yiqi Luo +22 more
TL;DR: It is shown that the magnitude of replenishment is greater than that of priming, resulting in a net increase in SOC by a mean of 32% of the added new C, and a two-pool interactive model is a parsimonious model to represent the SOC decomposition with priming and replenishment.
Priming of soil organic matter: Chemical structure of added compounds is more important than the energy content
TL;DR: In this paper, the authors examined the effect of added compounds on soil priming effects, namely metabolic usable energy for microbes and resemblance to recalcitrant fractions of soil organic matter (SOM).
100
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