globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13650
论文题名:
Soil carbon sequestration due to post-Soviet cropland abandonment: estimates from a large-scale soil organic carbon field inventory
作者: Wertebach T.-M.; Hölzel N.; Kämpf I.; Yurtaev A.; Tupitsin S.; Kiehl K.; Kamp J.; Kleinebecker T.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2017
卷: 23, 期:9
起始页码: 3729
结束页码: 3741
语种: 英语
英文关键词: carbon sequestration ; climate change mitigation ; land-use change ; self-restoration ; soil organic carbon ; Western Siberia
英文摘要: The break-up of the Soviet Union in 1991 triggered cropland abandonment on a continental scale, which in turn led to carbon accumulation on abandoned land across Eurasia. Previous studies have estimated carbon accumulation rates across Russia based on large-scale modelling. Studies that assess carbon sequestration on abandoned land based on robust field sampling are rare. We investigated soil organic carbon (SOC) stocks using a randomized sampling design along a climatic gradient from forest steppe to Sub-Taiga in Western Siberia (Tyumen Province). In total, SOC contents were sampled on 470 plots across different soil and land-use types. The effect of land use on changes in SOC stock was evaluated, and carbon sequestration rates were calculated for different age stages of abandoned cropland. While land-use type had an effect on carbon accumulation in the topsoil (0–5 cm), no independent land-use effects were found for deeper SOC stocks. Topsoil carbon stocks of grasslands and forests were significantly higher than those of soils managed for crops and under abandoned cropland. SOC increased significantly with time since abandonment. The average carbon sequestration rate for soils of abandoned cropland was 0.66 Mg C ha−1 yr−1 (1–20 years old, 0–5 cm soil depth), which is at the lower end of published estimates for Russia and Siberia. There was a tendency towards SOC saturation on abandoned land as sequestration rates were much higher for recently abandoned (1–10 years old, 1.04 Mg C ha−1 yr−1) compared to earlier abandoned crop fields (11–20 years old, 0.26 Mg C ha−1 yr−1). Our study confirms the global significance of abandoned cropland in Russia for carbon sequestration. Our findings also suggest that robust regional surveys based on a large number of samples advance model-based continent-wide SOC prediction. © 2017 John Wiley & Sons Ltd
资助项目: This work was conducted as part of project SASCHA (‘sustainable land management and adaptation strategies to climate change for the Western Siberian grain belt’). We are grateful for funding by the German Government, Federal Ministry of Education and Research, within their Sustainable Land Management funding framework (funding reference 01LL0906F). Our work was supported by the laboratory of the Institute of Landscape Ecology. The help of Ulrike Berning-Mader, Madeleine Supper and Melanie Tappe in C/N analyses and the assistance of Martin Freitag, Cordula Knabe, Isabella Närdemann and Sabrina Wittig are greatly acknowledged. Wanja Mathar and Sarah Weking are gratefully acknowledged for their help during fieldwork. Thanks to Andrey Tolstikov and Roman Latyntsev for organizing our field campaigns in Russia and establishing partnerships with Russian colleagues. We thank two anonymous reviewers for improving an earlier version of this manuscript.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60828
Appears in Collections:影响、适应和脆弱性

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作者单位: Biodiversity and Ecosystem Research Group, Institute of Landscape Ecology, University of Münster, Heisenbergstraße 2, Münster, Germany; Vegetation Ecology and Botany Group, Osnabrück University of Applied Sciences, Osnabrück, Germany; Tyumen State University, Semakova Str. 10, Tyumen, Russian Federation

Recommended Citation:
Wertebach T.-M.,Hölzel N.,Kämpf I.,et al. Soil carbon sequestration due to post-Soviet cropland abandonment: estimates from a large-scale soil organic carbon field inventory[J]. Global Change Biology,2017-01-01,23(9)
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