Pyrogenic Carbon Lacks Long-Term Persistence in Temperate Arable Soils

被引：27

作者：

Lutfalla, Suzanne ^{[1
,2
]}

Abiven, Samuel ^{[3
]}

Barre, Pierre ^{[2
]}

Wiedemeier, Daniel B. ^{[3
]}

Christensen, Bent T. ^{[4
]}

Houot, Sabine ^{[1
]}

Katterer, Thomas ^{[5
]}

Macdonald, Andy J. ^{[6
]}

Van Oort, Folkert ^{[1
]}

Chenu, Claire ^{[1
]}

机构：

[1] INRA, AgroParisTech, UMR ECOSYS 1402, Thiverval Grignon, France

[2] PSL Res Univ, CNRS, UMR8538, Lab Geol,ENS, Paris, France

[3] Univ Zurich, Dept Geog, Zurich, Switzerland

[4] Aarhus Univ, Dept Agroecol, Aarhus, Denmark

[5] Swedish Univ Agr Sci, Dept Ecol, Uppsala, Sweden

[6] Rothamsted Res, Dept Sustainable Soils & Grassland Syst, Harpenden, Herts, England

来源：

FRONTIERS IN EARTH SCIENCE | 2017年 / 5卷

基金：

英国生物技术与生命科学研究理事会;

关键词：

soil organic matter persistence; soil carbon sequestration; carbon cycle; pyrogenic carbon; climate change mitigation; long term bare fallows; BLACK CARBON; ORGANIC-MATTER; TURNOVER; DYNAMICS; TRANSFORMATION; STABILITY; QUANTITY; CHARCOAL; QUALITY; FIRE;

D O I：

10.3389/feart.2017.00096

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Pyrogenic organic carbon (PyOC) derived from incomplete burning of biomass is considered the most persistent fraction of soil organic carbon (SOC), being expected to remain in soil for centuries. However, PyOC persistence has seldom been evaluated under field conditions. Based on a unique set of soils from five European long-term bare fallows (LTBF), i.e., vegetation-free field experiments, we provide the first direct comparison between PyOC and SOC persistence in temperate arable soils. We found that soil PyOC contents decreased more rapidly than expected from current concepts, the mean residence time (MRT) of native PyOC being just 1.6 times longer than that of SOC. At the oldest experimental site, 55% of the initial PyOC remained after 80 years of bare fallow. Our results suggest that while the potential for long-term C storage exists, the persistence of PyOC in soil may currently be overestimated.

引用

页数：10

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