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Estimating Soil Carbon Sequestration Potential in Fine Particles of Top Soils in Hebei Province, China Xianghui Cao, Huaiyu Long, Qiuliang Lei and Shuxia Wu

Abstract Accurate evaluation of carbon sequestration potential (CSP) plays an important role in mitigating the buildup of atmospheric carbon dioxide. This study evaluated topsoil CSP of Hebei, using data collected during the recent soil inventory in 2010–2011. The results showed that shajiang black soils, irrigation silting soils, and coastal solonchaks were found the highest C content, and the values of them are 109.46 ± 14.70, 108.96 ± 30.24, and 146.91 ± 19.43 t C/ha, respectively. However, in terms of total potential of sequestration, although average potential of brown earths, cinnamon soils, and fluvo-aquic soils is not the highest, total potential of them is higher, and the values of them are 161.11, 475.12, and 409.76 Tg, respectively. From the perspective of the spatial pattern of CSP, the soils of 80–120 t C/ha that included bog soils, shajiang black soils, solonchaks, and irrigation silting soils possess the largest area (60.39 % of total soil area) and distributed mainly in the middle part of Hebei. The results will make it clear to understand the status quo of CSP, and the different types of soils play different roles in sources and sinks of CO2. Keywords Topsoil


Carbon sequestration
SOC
Carbon saturation

X. Cao
H. Long
Q. Lei (&)
S. Wu Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China e-mail: [email protected] X. Cao e-mail: [email protected] H. Long e-mail: [email protected] S. Wu e-mail: [email protected] © Springer Science+Business Media Singapore 2016 G.-L. Zhang et al. (eds.), Digital Soil Mapping Across Paradigms, Scales and Boundaries, Springer Environmental Science and Engineering, DOI 10.1007/978-981-10-0415-5_19

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Introduction

The world pays more attention to the climate change in recent years. The atmospheric CO2 concentration has increased by 0.31 times from 1750 to 1999 and is currently increasing at the rate of 1.5 ppmv/year (McCarthy and Intergovernmental Panel on Climate Change. Working Group II 2001). However, terrestrial soils play an important role in the atmospheric carbon dioxide budget, which includes 1500 Pg of organic carbon, or 2.5–3 times as much organic carbon as the global atmosphere or terrestrial vegetation (Batjes 1996; Follett 2010). Consequently, these estimates will help establish better soil management practices, which could improve soil quality and mitigate the effects of global warming (Lal 2004a). Currently, national or regional scale soil organic carbon (SOC) density and carbon sequestration research, especially in agricultural soils, have attracted significant attention (Vleeshouwers and Verhagen 2002; Marland et al. 2003). Numerous studies have been conducted to estimate agricultural soil sequestration potentials and explore management options to enhance carbon sequestration at national and