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dc.contributor.authorWhalley, W Richarden_UK
dc.contributor.authorRiseley, Ben_UK
dc.contributor.authorLeeds-Harrison, Peter Ben_UK
dc.contributor.authorBird, Nigel R Aen_UK
dc.contributor.authorLeech, Penny Ken_UK
dc.contributor.authorAdderley, W Paulen_UK
dc.description.abstractThe physical characteristics of the soil at the root–soil interface are crucial because they determine both physical aspects of root function such as water and nutrient uptake and the microbial activity that is most relevant to root growth. Because of this we have studied how root activity modifies the structure and water retention characteristic of soil adjacent to the root for maize, wheat and barley. These plants were grown in pots for a 6-week growth period, then the soil adjacent to the root (rhizosphere soil) and bulk soil aggregates were harvested. These soil aggregates were then saturated and equilibrated at matric potentials between ~600 kPa and saturation, and the water retention characteristics were measured. From subsamples of these aggregates, thin sections were made and the porosity and pore-size distributions were studied with image analysis. Both image analysis and estimates of aggregated density showed that the rhizosphere soil and bulk soil had similar porosities. Growing different plants had a small but significant effect on the porosity of the soil aggregates. Image analysis showed that for all the plant species the structure of the rhizosphere soil was different to that of the bulk soil. The rhizosphere soil contained more larger pores. For maize and barley, water retention characteristics indicated that the rhizosphere soil tended to be drier at a given matric potential than bulk soil. This effect was particularly marked at greater matric potentials. The difference between the water retention characteristics of the bulk and rhizosphere soil for wheat was small. We compare the water retention characteristics with the data on pore-size distribution from image analysis. We suggest that differences in wetting angle and pore connectivity might partly explain the differences in water retention characteristic that we observed. The impact of differences between the water retention properties of the rhizosphere and bulk soil is discussed in terms of the likely impact on root growth.en_UK
dc.publisherWiley-Blackwell / British Society of Soil Scienceen_UK
dc.relationWhalley WR, Riseley B, Leeds-Harrison PB, Bird NRA, Leech PK & Adderley WP (2005) Structural differences between bulk and rhizosphere soil. European Journal of Soil Science, 56 (3), pp. 353-360.
dc.rightsThe publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author; you can only request a copy if you wish to use this work for your own research or private study.en_UK
dc.subjectSoil Micromorphologyen_UK
dc.subjectImage analysisen_UK
dc.subjectSoil micromorphologyen_UK
dc.subjectSocial sciences Researchen_UK
dc.titleStructural differences between bulk and rhizosphere soilen_UK
dc.typeJournal Articleen_UK
dc.rights.embargoreason[Whalley_rhizosphere_EJSS2005.pdf] The publisher does not allow this work to be made publicly available in this Repository therefore there is an embargo on the full text of the work.en_UK
dc.citation.jtitleEuropean Journal of Soil Scienceen_UK
dc.type.statusVoR - Version of Recorden_UK
dc.contributor.affiliationSilsoe Research Instituteen_UK
dc.contributor.affiliationCranfield Universityen_UK
dc.contributor.affiliationCranfield Universityen_UK
dc.contributor.affiliationCranfield Universityen_UK
dc.contributor.affiliationSilsoe Research Instituteen_UK
dc.contributor.affiliationBiological and Environmental Sciencesen_UK
rioxxterms.typeJournal Article/Reviewen_UK
local.rioxx.authorWhalley, W Richard|en_UK
local.rioxx.authorRiseley, B|en_UK
local.rioxx.authorLeeds-Harrison, Peter B|en_UK
local.rioxx.authorBird, Nigel R A|en_UK
local.rioxx.authorLeech, Penny K|en_UK
local.rioxx.authorAdderley, W Paul|0000-0001-5552-1696en_UK
local.rioxx.projectInternal Project|University of Stirling|
Appears in Collections:Biological and Environmental Sciences Journal Articles

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