Soil carbon source and accumulation over 12,000 years in a semi-natural Miscanthus sinensis grassland in southern Japan

Auteur(s) et Affiliation(s)

HOWLETT, D.S.

Energy Biosciences Inst., Univ. of Illinois, Urbana, Etats-Unis

TOMA, Y.

Energy Biosciences Inst., Univ. of Illinois, Urbana, Etats-Unis

Fac. of Agriculture, Univ. Matsuyama, Ehime, Japon

WANG, H.

Illinois State Geological Survey, Prairie Research Inst., Univ., Champaign, Etats-Unis

SUGIYAMA, S.

Paleoenvironment Research Co., Ltd, Miyazaki, Japon

YAMADA, T.

Field Science Center for Northern Biosphere, Hokkaido Univ., Sapporo, Japon

NISHIWAKI, A.

Field Science Center, Fac. of Agriculture, Univ., Miyazaki, Japon

FERNANDEZ, F.

Dep. of Crop Sciences, Univ. of Illinois, Urbana, Etats-Unis

STEWART, J.R.

Energy Biosciences Inst., Univ. of Illinois, Urbana, Etats-Unis

Dep. of Plant and Wildlife Sciences, Brigham Young Univ., Provo, Etats-Unis

Description :
Soil carbon stock source was determined in 2 soil profiles on Miscanthus sinensis grassland at the Aso-Kuju National Park in Kumamoto Prefecture, Kyushu. Isotopic analysis demonstrated that 66.8% of soil C was derived from a C4 source. Radiocarbon-ages of soil fractions were highly correlated with soil depth (R2 = 0.99). Over a 12,000 year history of land use at the Aso caldera, Miscanthus sinensis was found to be a major contributor to soil carbon and a sink for atmospheric CO2, which, under certain constraints, has implications for the potential sequestration of soil carbon under Miscanthus in cultivated conditions.

Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2013, vol. 104, p. 127-135, nombre de pages : 9, Références bibliographiques : 1 p.

Date :
2013

Editeur :
Pays édition : Allemagne, Cremlingen-Destedt, Catena

Langue :
Anglais