Preprint Article Version 1 This version is not peer-reviewed

Effects of Plum Plantation Ages on Soil Organic Carbon Mineralization in The Karst Rocky Desertification Ecosystem of Southwest China

Version 1 : Received: 13 November 2019 / Approved: 14 November 2019 / Online: 14 November 2019 (09:17:50 CET)

A peer-reviewed article of this Preprint also exists.

Yang, H.; Mo, B.; Zhou, M.; Zhu, T.; Cao, J. Effects of Plum Plantation Ages on Soil Organic Carbon Mineralization in the Karst Rocky Desertification Ecosystem of Southwest China. Forests 2019, 10, 1107. Yang, H.; Mo, B.; Zhou, M.; Zhu, T.; Cao, J. Effects of Plum Plantation Ages on Soil Organic Carbon Mineralization in the Karst Rocky Desertification Ecosystem of Southwest China. Forests 2019, 10, 1107.

Journal reference: Forests 2019, 10, 1107
DOI: 10.3390/f10121107

Abstract

Soil organic carbon (SOC) mineralization is closely related to carbon source or sink of terrestrial ecosystem. Understanding soil organic carbon (SOC) mineralization under plum plantation is essential for improving our understanding of SOC responses to land-use change in karst rocky desertification ecosystem. In this study, 2-y, 5-y and 20-y plum plantations and adjacent woodland were sampled and a 90-day incubation experiment was conducted to investigate the effect of plum plantation with different years on SOC mineralization in subtropical China. Results showed that: (1) there was no significant difference in SOC content between different planting years, but there were significant differences in accumulative SOC mineralization (Ct) and potential SOC mineralization (C0); (2) the dynamics of the SOC mineralization was a good fit to a first-order kinetic model. Both C0 and Ct in calcareous soil of this study was several to ten folds lower than that in other soils, indicating that SOC in karst region has higher stability. (3) Correlation analysis revealed that both Ct and C0 was significantly correlated with soil calcium (Ca) and C/N, indicating the important role of Ca and C/N in SOC mineralization in karst rocky desertification area.

Subject Areas

calcareous soil; plantation ages; organic carbon mineralization; fitting parameters; organic carbon accumulation

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