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Titolo:
THE RESIDENCE TIMES OF C, AND THE POTENTI AL FOR C-STORAGE IN SOME FRENCH CULTIVATED SOILS
Autore:
BALESDENT J; RECOUS S;
Indirizzi:
UNIV PARIS 06,INRA,CNRS,LAB BIOGEOCHIM ISOTOP,4 PL JUSSIEU CC 120 F-75252 PARIS 05 FRANCE INRA,UNITE AGRON F-02007 LAON FRANCE
Titolo Testata:
Canadian Journal of Soil Science
fascicolo: 2, volume: 77, anno: 1997,
pagine: 187 - 193
SICI:
0008-4271(1997)77:2<187:TRTOCA>2.0.ZU;2-2
Fonte:
ISI
Lingua:
FRE
Soggetto:
ORGANIC-MATTER; C-13 ABUNDANCE; GRASSLANDS; EMISSIONS; TURNOVER; CARBON; MAIZE; FIELD;
Keywords:
FRANCE; GREENHOUSE GASES; MINERALIZATION; MODEL; SOIL CARBON; STORAGE; TEMPERATURE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
21
Recensione:
Indirizzi per estratti:
Citazione:
J. Balesdent e S. Recous, "THE RESIDENCE TIMES OF C, AND THE POTENTI AL FOR C-STORAGE IN SOME FRENCH CULTIVATED SOILS", Canadian Journal of Soil Science, 77(2), 1997, pp. 187-193

Abstract

In order to predict the potential of soils to store carbon in response to land use or climate changes, we measured the fluxes and distribution of residence times of C in French cultivated soils. We used the natural abundances in C-13 and C-14 to measure this distribution in long-term experiments of maize cultivation in France. 75% of the topsoil carbon had a mean residence time of 40 yr. Coarse particle-size fractions contained most of the younger carbon. A compartment of stable C wasestimated using radiocarbon dating. Belowground plant material inputsstored as much as C as aboveground inputs. The effect of temperature on soil carbon mineralization affected only rate constants, with a Q(10) = 3.1 constant in the range 1-25 degrees C. The data were summerized in a simple simulation model, which predicted a nil or low effect ofclimatic change on soil carbon storage in the next 50 yr. In France, land use changes will have more influence than atmospheric changes on C storage.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/11/20 alle ore 13:41:00