Differences in pedotransfer functions of bulk density lead to high uncertainty in soil organic carbon estimation at regional scales: Evidence from Chinese terrestrial ecosystems
Xu, L; He, NP; Yu, GR; Wen, D; Gao, Y; He, HL
2015
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
ISSN2169-8953
Volume120Issue:8Pages:1567-1575
AbstractAccurate estimation of soil organic carbon (SOC) storage is important for evaluating carbon sequestration of terrestrial ecosystems at regional scale. How the selected pedotransfer functions (PTFs) of bulk density (BD) influence the estimates of SOC storage is still unclear at large scales, although BD is an important parameter in all equations. Here we used data from the second national soil survey in China (8210 soil profiles) to evaluate the influence of eight selected PTFs on the estimation of SOC storage. The results showed that different PTFs may result in a higher uncertainty of SOC storage estimation and the coefficient of variation (CV, %) for the eight PTFs varied from 10.61% to 70.46% (mean = 12.75%). The observed CV values were higher in the 0-20 cm layer (12.48%) than in the 20-100 cm layer (10.05%). CV values were relatively stable (10-15%) when SOC content ranged from 0.13% to 3.45%. The findings indicate that PTFs may be used cautiously in soils with higher or lower SOC content. Estimates of SOC storage in the 0-100 cm soil layer varied from 67.19 to 95.97 Pg C in the eight PTFs in China, with an average of 87.36 +/- 8.93 Pg C (CV = 10.23%). Our findings provide the insight that differences in PTFs are important sources of uncertainty in SOC estimates. The development of better PFTs, or the integration of various PFTs, is essential to accurately estimate SOC storage at regional scales.
SubtypeJournal
Subject AreaEnvironmental Sciences & Ecology ; Geology
WOS Subject ExtendedEnvironmental Sciences ; Geosciences, Multidisciplinary
WOS KeywordVERTICAL-DISTRIBUTION ; CHEMICAL-PROPERTIES ; CLIMATE-CHANGE ; STORAGE ; STOCKS ; WORLD ; SEQUESTRATION ; FEEDBACKS ; NITROGEN ; MATTER
Indexed BySCI
Language英语
WOS IDWOS:000363332300008
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Cited Times:16[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/44377
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
Xu, L,He, NP,Yu, GR,et al. Differences in pedotransfer functions of bulk density lead to high uncertainty in soil organic carbon estimation at regional scales: Evidence from Chinese terrestrial ecosystems[J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2015,120(8):1567-1575.
APA Xu, L,He, NP,Yu, GR,Wen, D,Gao, Y,&He, HL.(2015).Differences in pedotransfer functions of bulk density lead to high uncertainty in soil organic carbon estimation at regional scales: Evidence from Chinese terrestrial ecosystems.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,120(8),1567-1575.
MLA Xu, L,et al."Differences in pedotransfer functions of bulk density lead to high uncertainty in soil organic carbon estimation at regional scales: Evidence from Chinese terrestrial ecosystems".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 120.8(2015):1567-1575.
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