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Titolo:
THE RHIZOSPHERE AND PLANT NUTRITION - A QUANTITATIVE APPROACH
Autore:
DARRAH PR;
Indirizzi:
UNIV OXFORD,DEPT PLANT SCI,S PARKS RD OXFORD OX1 3RB ENGLAND
Titolo Testata:
Plant and soil
, volume: 156, anno: 1993,
pagine: 1 - 20
SICI:
0032-079X(1993)156:<1:TRAPN->2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
FIR PSEUDOTSUGA-MENZIESII; ABIES L KARST; ACID-PHOSPHATASE-ACTIVITY; LOBLOLLY-PINE SEEDLINGS; ROOT-SOIL; PH CHANGES; MODELING MAGNESIUM; MYCORRHIZAL FUNGI; IRON AVAILABILITY; PERENNIAL PASTURE;
Keywords:
MODELS; PLANT NUTRITION; RHIZOSPHERE; ROOTS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
138
Recensione:
Indirizzi per estratti:
Citazione:
P.R. Darrah, "THE RHIZOSPHERE AND PLANT NUTRITION - A QUANTITATIVE APPROACH", Plant and soil, 156, 1993, pp. 1-20

Abstract

The role of the rhizosphere in relation to mineral nutrition is discussed within a quantitative framework using the Barber-Cushman model asa starting point. The uptake or release of nutrients by roots growingin soil leads to concentration gradients forming in the soil: the zone so affected is termed the rhizosphere. The nature of these gradientsdepends on three factors: the rate of uptake/release; the mobility ofthe nutrient in soil; and the rate of conversion between available and unavailable forms. The interplay between these factors determines the amount of mineral nutrients acquired by the plant and it is the complexity of the interplay which demands the use of mathematical models in order to understand which factors most limit uptake. Despite extensive experimental evidence of root-mediated changes to the physical, chemical and biological status of rhizosphere soil, the quantitative significance of these changes for mineral nutrition has not been assessed. The problems of making this quantitative transition are reviewed.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/11/20 alle ore 08:25:36