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More replenishment than priming loss of soil organic carbon with additional carbon input

Authors :
Jianyang Xia
Zheng Shi
James R. Cole
Bo Liu
Xiaoming Li
Lei Huang
Konstantinos T. Konstantinidis
Ying-Ping Wang
C. Ryan Penton
Junyi Liang
Zhongkui Luo
Changfu Huo
Jizhong Zhou
Liyou Wu
Zhenghu Zhou
James M. Tiedje
Edward A. G. Schuur
Yiqi Luo
Source :
Nature communications, vol 9, iss 1, Nature Communications, Vol 9, Iss 1, Pp 1-9 (2018), Liang, J; Zhou, Z; Huo, C; Shi, Z; Cole, JR; Huang, L; et al.(2018). More replenishment than priming loss of soil organic carbon with additional carbon input. Nature Communications, 9(1). doi: 10.1038/s41467-018-05667-7. Lawrence Berkeley National Laboratory: Retrieved from: http://www.escholarship.org/uc/item/49k0v82n, Nature Communications
Publication Year :
2018
Publisher :
eScholarship, University of California, 2018.

Abstract

Increases in carbon (C) inputs to soil can replenish soil organic C (SOC) through various mechanisms. However, recent studies have suggested that the increased C input can also stimulate the decomposition of old SOC via priming. Whether the loss of old SOC by priming can override C replenishment has not been rigorously examined. Here we show, through data–model synthesis, 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. The magnitude of the net increase in SOC is positively correlated with the nitrogen-to-C ratio of the added substrates. Additionally, model evaluation indicates that a two-pool interactive model is a parsimonious model to represent the SOC decomposition with priming and replenishment. Our findings suggest that increasing C input to soils likely promote SOC accumulation despite the enhanced decomposition of old C via priming.<br />The magnitudes of replenishment and priming, two important but opposing fluxes in soil organic carbon (SOC) dynamics, have not been compared. Here the authors show that the magnitude of replenishment is greater than that of priming, resulting in a net SOC accumulation after additional carbon input to soils.

Details

Database :
OpenAIRE
Journal :
Nature communications, vol 9, iss 1, Nature Communications, Vol 9, Iss 1, Pp 1-9 (2018), Liang, J; Zhou, Z; Huo, C; Shi, Z; Cole, JR; Huang, L; et al.(2018). More replenishment than priming loss of soil organic carbon with additional carbon input. Nature Communications, 9(1). doi: 10.1038/s41467-018-05667-7. Lawrence Berkeley National Laboratory: Retrieved from: http://www.escholarship.org/uc/item/49k0v82n, Nature Communications
Accession number :
edsair.doi.dedup.....c52d40d2241d743f0454edd5c230f750
Full Text :
https://doi.org/10.1038/s41467-018-05667-7.