Does metal pollution matter with C retention by rice soil?

Rongjun Bian, Kun Cheng, Jufeng Zheng, Xiaoyu Liu, Yongzhuo Liu, Zhipeng Li, Lianqing Li, Pete Smith, Genxing Pan, David Crowley, Jinwei Zheng, Xuhui Zhang, Liangyun Zhang, Qaiser Hussain

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Abstract

Soil respiration, resulting in decomposition of soil organic carbon (SOC), emits CO2 to the atmosphere and increases under climate warming. However, the impact of heavy metal pollution on soil respiration in croplands is not well understood. Here we show significantly increased soil respiration and efflux of both CO2 and CH4 with a concomitant reduction in SOC storage from a metal polluted rice soil in China. This change is linked to a decline in soil aggregation, in microbial abundance and in fungal dominance. The carbon release is presumably driven by changes in carbon cycling occurring in the stressed soil microbial community with heavy metal pollution in the soil. The pollution-induced increase in soil respiration and loss of SOC storage will likely counteract efforts to increase SOC sequestration in rice paddies for climate change mitigation.

Original languageEnglish
Article number13233
Number of pages7
JournalScientific Reports
Volume5
Early online date14 Aug 2015
DOIs
Publication statusPublished - 2015

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Bian, R., Cheng, K., Zheng, J., Liu, X., Liu, Y., Li, Z., ... Hussain, Q. (2015). Does metal pollution matter with C retention by rice soil? Scientific Reports, 5, [13233]. https://doi.org/10.1038/srep13233