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Titolo:
A review of rhizosphere carbon flow modelling
Autore:
Toal, ME; Yeomans, C; Killham, K; Meharg, AA;
Indirizzi:
Ctr Ecol & Hydrol Monks Wood, Huntingdon PE28 2LS, Cambs, England Ctr Ecol& Hydrol Monks Wood Huntingdon Cambs England PE28 2LS s, England Univ Aberdeen, Dept Plant & Soil Sci, Aberdeen AB24 3UU, Scotland Univ Aberdeen Aberdeen Scotland AB24 3UU ci, Aberdeen AB24 3UU, Scotland
Titolo Testata:
PLANT AND SOIL
fascicolo: 1-2, volume: 222, anno: 2000,
pagine: 263 - 281
SICI:
0032-079X(2000)222:1-2<263:ARORCF>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
SOIL MICROBIAL BIOMASS; FUNGAL GROWTH-RESPONSE; ZEA-MAYS-L; PSEUDOMONAS-FLUORESCENS; MATHEMATICAL-ANALYSIS; RESPIRATION CURVES; ORGANIC-CARBON; NITROGEN MINERALIZATION; POPULATION DYNAMICS; THEORETICAL-MODEL;
Keywords:
carbon; mechanistic; model; rhizosphere; sensitivity analysis;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
99
Recensione:
Indirizzi per estratti:
Indirizzo: Toal, ME Ctr Ecol & Hydrol Monks Wood, Huntingdon PE28 2LS, Cambs, EnglandCtr Ecol & Hydrol Monks Wood Huntingdon Cambs England PE28 2LS d
Citazione:
M.E. Toal et al., "A review of rhizosphere carbon flow modelling", PLANT SOIL, 222(1-2), 2000, pp. 263-281

Abstract

Rhizosphere processes play a key role in nutrient cycling in terrestrial ecosystems. Plant rhizodeposits supply low-molecular weight carbon substrates to the soil microbial community, resulting in elevated levels of activitysurrounding the root. Mechanistic compartmental models that aim to model carbon flux through the rhizosphere have been reviewed and areas of future research necessary to better calibrate model parameters have been identified. Incorporating the effect of variation in bacterial biomass physiology on carbon flux presents a considerable challenge to experimentalists and modellers alike due to the difficulties associated with differentiating dead from dormant cells. A number of molecular techniques that may help to distinguish between metabolic states of bacterial cells are presented. The calibration of growth, death and maintenance parameters in rhizosphere models is also discussed. A simple model of rhizosphere carbon flow has been constructed and a sensitivity analysis was carried out on the model to highlight which parameters were most influential when simulating carbon flux. It was observed that the parameters that most heavily influenced long-term carbon compartmentalisation in the rhizosphere were exudation rate and biomass yield. It was concluded that future efforts to simulate carbon flow in the rhizosphere should aim to increase ecological realism in model structure.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 14/07/20 alle ore 05:31:53