The impact of agricultural soil erosion on the global carbon cycle

被引：776

作者：

Van Oost, K.

Quine, T. A.

Govers, G.

De Gryze, S.

Six, J.

Harden, J. W.

Ritchie, J. C.

McCarty, G. W.

Heckrath, G.

Kosmas, C.

Giraldez, J. V.

da Silva, J. R. Marques

Merckx, R.

机构：

[1] Katholieke Univ Leuven, Phys & Reg Geog Res Grp, B-3001 Heverlee, Belgium

[2] Univ Exeter, Dept Geog, Exeter EX4 4RJ, Devon, England

[3] Univ Calif Davis, Dept Plant Sci, Davis, CA 95616 USA

[4] US Geol Survey, Menlo Pk, CA 94025 USA

[5] USDA ARS, Hydrol & Remote Sensing Lab, Beltsville, MD 20705 USA

[6] Univ Aarhus, Dept Agroecol & Environm, Res Ctr Foulum, DK-8830 Tjele, Denmark

[7] Agr Univ Athens, Lab Soils & Agr Chem, Athens 11855, Greece

[8] Univ Cordoba, Dept Agron, E-14080 Cordoba, Spain

[9] Univ Evora, Dept Rural Engn, Inst Ciencias Agr Mediterran, Evora, Portugal

[10] Katholieke Univ Leuven, Div Soil & Water Management, B-3001 Heverlee, Belgium

来源：

SCIENCE | 2007年 / 318卷 / 5850期

关键词：

D O I：

10.1126/science.1145724

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Agricultural soil erosion is thought to perturb the global carbon cycle, but estimates of its effect range from a source of 1 petagram per year(-1) to a sink of the same magnitude. By using caesium-137 and carbon inventory measurements from a large-scale survey, we found consistent evidence for an erosion-induced sink of atmospheric carbon equivalent to approximately 26% of the carbon transported by erosion. Based on this relationship, we estimated a global carbon sink of 0.12 (range 0.06 to 0.27) petagrams of carbon per year(-1) resulting from erosion in the world's agricultural landscapes. Our analysis directly challenges the view that agricultural erosion represents an important source or sink for atmospheric CO2.

引用

页码：626 / 629

页数：4

共 29 条

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