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Titolo:
SIMULATING TRENDS OF SOIL ORGANIC-CARBON IN 7 LONG-TERM EXPERIMENTS USING THE SOMM MODEL OF THE HUMUS TYPES
Autore:
CHERTOV OG; KOMAROV AS; CROCKER G; GRACE P; KLIR J; KORSCHENS M; POULTON PR; RICHTER D;
Indirizzi:
ST PETERSBURG STATE UNIV,INST BIOL,ORANIENBAUM RD 2,PETERHOFF ST PETERSBURG 198904 RUSSIA RUSSIAN ACAD SCI,INST SOIL SCI & PHOTOSYNTH MOSCOW 142292 RUSSIA NSW AGR,TAMWORTH CTR CROP IMPROVEMENT TAMWORTH NSW 2340 AUSTRALIA CRC SOIL & LAND MANAGEMENT ADELAIDE SA AUSTRALIA RES INST CROP PROD CR-16106 PRAGUE 6 RUZYNE CZECH REPUBLIC UFZ LEIPZIG HALLE GMBH,SEKT BODEN FORSCH BAD LAUCHSTADT D-06246 LEIPZIG GERMANY IACR ROTHAMSTED HARPENDEN AL5 2JQ HERTS ENGLAND DUKE UNIV DURHAM NC 27708
Titolo Testata:
Geoderma
fascicolo: 1-2, volume: 81, anno: 1997,
pagine: 121 - 135
SICI:
0016-7061(1997)81:1-2<121:STOSOI>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Keywords:
SOIL ORGANIC MATTER; HUMUS TYPES; MODELING; LONG-TERM SOM EXPERIMENTS; MODEL EVALUATION;
Tipo documento:
Article
Natura:
Periodico
Citazioni:
25
Recensione:
Indirizzi per estratti:
Citazione:
O.G. Chertov et al., "SIMULATING TRENDS OF SOIL ORGANIC-CARBON IN 7 LONG-TERM EXPERIMENTS USING THE SOMM MODEL OF THE HUMUS TYPES", Geoderma, 81(1-2), 1997, pp. 121-135

Abstract

Using the SOMM model of the humus types (Mor, Moder, Mull), simulations of SOM dynamics at seven long-term experiments were attempted as a part of a model evaluation exercise. The model comprises three compartments (undecomposed litter, partially humified litter, humus of mineral topsoil) and considers six processes of mineralization and humification as influenced by litter nitrogen and ash contents, soil C/N ratio,temperature and moisture. Results of simulations performed without any site-specific calibration mostly underestimate soil organic matter (SOM). Despite this lack of precision, general trends in SOM over time were often captured. Success of simulation was limited by difficultiesin obtaining direct information about soil moisture regime, litter quantity and litter quality (nitrogen and ash content). Inadequacies in the model, such as no consideration of soil properties, may also account for some of the errors. Despite the limited success of the evaluation, it is encouraging that the model conceived for forested ecosystems, with additional development, may be applicable to non-forested systems. The exercise underlines the necessity of constant direct contact between modeller and data holder for a success of an evaluation. (C) 1997 Elsevier Science B.V.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/09/20 alle ore 12:52:39