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Long-term intensive management increased carbon occluded in phytolith (PhytOC) in bamboo forest soils

Articles

Journal/Conference:

SCIENTIFIC REPORTS

Language:

English

Author:

Huang ZhangTing; Jiang PeiKun; Chang Scott X.; Liu Juan

Experts:

Li Yongfu; Song Zhaoliang; Zhou Guomo

Year:

2014

Volume:

4

Pages:

3601

Carbon (C) occluded in phytolith (PhytOC) is highly stable at millennium scale and its accumulation in soils can help increase long-term C sequestration. Here, we report that soil PhytOC storage significantly increased with increasing duration under intensive management (mulching and fertilization) in Lei bamboo (Phyllostachys praecox) plantations. The PhytOC storage in 0-40 cm soil layer in bamboo plantations increased by 217 Mg C ha(-1), 20 years after being converted from paddy fields. The PhytOC accumulated at 79 kg C ha(-1) yr(-1), a rate far exceeding the global mean long-term soil C accumulation rate of 24 kg C ha(-1) yr(-1) reported in the literature. Approximately 86% of the increased PhytOC came from the large amount of mulch applied. Our data clearly demonstrate the decadal scale management effect on PhytOC accumulation, suggesting that heavy mulching is a potential method for increasing long-term organic C storage in soils for mitigating global climate change.