Assessment of Plant-Driven Mineral Weathering in an Aggrading Forested Watershed in Subtropical China
Zuo, SM; Yang, JL; Huang, LM; Rossiter, DG; Zhang, GL
2016
Source PublicationPEDOSPHERE
ISSN1002-0160
Volume26Issue:6Pages:817-828
AbstractPlant growth contributes to mineral weathering, but this contribution remains poorly understood. Weathering rates in an aggrading forested watershed in subtropical China were studied by means of geochemical mass balance. Rainfall, dry deposition, and streamwater were monitored from March 2007 to February 2012. Samples of vegetative components, rainfall, dry deposition, streamwater, representative soils, and parent rock were collected and determined for mass balance calculation and clarifying plant-driven weathering mechanisms stoichiometrically. Ignoring biomass, weathering rates of Ca2+, Mg2+, Na+, and Si were 25.6, 10.7, 2.8, and 51.0 kg ha(-1) year(-1), respectively. Taking biomass into consideration, weathering rates of Ca2+, Mg2+, and Si and the sum of weathering rates of Ca2+, Mg2+, Na+, K+, and Si were 2.6, 1.8, 1.2, and 1.5-fold higher than those ignoring biomass, respectively. This is attributed to plant-driven weathering due to the nutrient (e.g., Ca2+, Mg2+, and K+) absorption by vegetation and substantial proton production during assimilation of these nutrients, with the former acting as a pump for removing weathering products and the latter being a source of weathering agents solubilizing mineral components. The same pattern of weathering, i.e., higher rates of weathering with than without including biomass in mass balance calculation, was reported in previous studies; however, the extent to which plants drive weathering rates varied with vegetation types and climatic zones. The documented biological weathering driven by plants is expected to play a critical role in regulating nutrient cycling and material flows within the Earth's Critical Zone.
SubtypeJournal
Keywordbiogeochemistry biomass Earth's Critical Zone geochemical mass balance nutrient absorption stoichiometric analysis vegetation weathering mechanisms
Subject AreaAgriculture
WOS Subject ExtendedSoil Science
WOS KeywordGEOCHEMICAL MASS BALANCES ; BASE CATION ; SOIL ACIDIFICATION ; CARBON-DIOXIDE ; RATES ; ECOSYSTEM ; CATCHMENTS ; PROTON ; CYCLE ; BIOGEOCHEMISTRY
Indexed BySCI
Language英语
WOS IDWOS:000390829800002
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/44145
Collection生态系统网络观测与模拟院重点实验室_生态网络实验室
Recommended Citation
GB/T 7714
Zuo, SM,Yang, JL,Huang, LM,et al. Assessment of Plant-Driven Mineral Weathering in an Aggrading Forested Watershed in Subtropical China[J]. PEDOSPHERE,2016,26(6):817-828.
APA Zuo, SM,Yang, JL,Huang, LM,Rossiter, DG,&Zhang, GL.(2016).Assessment of Plant-Driven Mineral Weathering in an Aggrading Forested Watershed in Subtropical China.PEDOSPHERE,26(6),817-828.
MLA Zuo, SM,et al."Assessment of Plant-Driven Mineral Weathering in an Aggrading Forested Watershed in Subtropical China".PEDOSPHERE 26.6(2016):817-828.
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