CO(2) consumption by silicate weathering has exerted a major control on atmospheric CO(2) over geologic time. In order to assess plant impact on this process, the study compared water geochemistry and CO(2) consumption rates by silicate weathering in watersheds covered by bamboos and other forests. Our study showed that SiO(2) concentrations (80 similar to 150 mu mol/L, average 105 mu mol/L) in water from pure bamboo forest watersheds were higher than that (15 similar to 85 mu mol/L, average 60 mu mol/L) from other watersheds. Si/(Na(silicate) + K(silicate)) ratios in water draining from bamboo watersheds (2.0 similar to 4.0, average 2.9) were higher than that from other watersheds ?>(0.7 similar to 2.7, average 2.2). CO(2) consumption rates by silicate weathering in bamboo watersheds (1.8 similar to 3.4 10(5) mol/km(2)/yr, average 2.5 10(5) mol/km(2)/yr) were higher than that in other watersheds (1.5 similar to 2.6 10(5) mol/km(2)/yr, average 2.0 10(5) mol/km(2)/yr). Therefore, bamboo-enhanced silicate weathering is a potential biogeochemical remediation approach for atmospheric CO(2).

Publication name	BOTANICAL REVIEW　Volume:77 　Issue:3 　Special Issue:SI 　Pages:208-213　Published:SEP 2011
Author(s)	Song, Zhaoliang; Zhao, Songlai; Zhang, Youzhen; Hu, Guoliang; Cao, Zhihong; Wong, Minghung
Corresponding author	CAO Zhihong  zhcao@issas.ac.cn  Zhejiang A&F Univ, Zhejiang Prov Key Lab Carbon Cycling Forest Ecosy, 88 N Huancheng Rd, Linan 311300, Zhejiang, Peoples R China
Author(s) from IGCAS	SONG Zhaoliang

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