Effects of soil compaction on phosphorus uptake and growth of Trifolium subterraneum colonized by four species of vesicular-arbuscular mycorrhizal fungi

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dc.contributor.authorNadian, H.
dc.contributor.authorSmith, S.
dc.contributor.authorAlston, A.
dc.contributor.authorMurray, R.
dc.contributor.authorSiebert, B.
dc.date.issued1998
dc.description.abstractThe ability of four species of vesicular–arbuscular mycorrhizal (VAM) fungi to increase phosphorus uptake and growth of clover plants (Trifolium subterraneum L.) at different levels of soil compaction and P application was studied in a pot experiment. Dry matter in the shoots and roots of clover plants decreased with increasing soil compaction. Colonization by Glomus intraradices Schenck & Smith and Glomus sp. City Beach WUM16 increased plant growth and P uptake up to a bulk density of 1•60 Mg m⁻³, although the response was smaller as soil compaction was increased. Glomus etunicatum Becker & Gerdeman and Glomus mosseae (Nicol. & Gerd.) Gerdemann & Trappe had no effect on the shoot d. wt and P uptake when the bulk density of the soil was ≥1•40 and ≥1•60 Mg m⁻³, respectively. Soil compaction to a bulk density of 1•60 Mg m⁻³ had no effect on the percentage of root length colonized by G. intraradices and Glomus sp. City Beach, but total root length colonized decreased as soil compaction was increased. Decreased P uptake and growth of clover plants colonized by G. intraradices and Glomus sp. City Beach, with increasing soil compaction up to a bulk density of 1•60 Mg m⁻³, was mainly attributed to a significant reduction in total root length colonized and in the hyphal biomass. Soil compaction, which increased bulk density from 1•20 to 1•75 Mg m⁻³, reduced the O₂ content of the soil atmosphere from 0•16 to 0•05 m3 m⁻³. The absence of any observable mycorrhizal growth response to any of the four species of VAM fungi in highly compacted soil (bulk density = 1•75 Mg m⁻³) was attributed to the significant decrease in the O₂ content of the soil atmosphere, change in soil pore size distribution and, presumably, to ethylene production.
dc.identifier.citationNew Phytologist, 1998; 140(1):155-165
dc.identifier.doi10.1046/j.1469-8137.1998.00219.x
dc.identifier.issn0028-646X
dc.identifier.issn1469-8137
dc.identifier.orcidMurray, R. [0000-0003-0108-5803]
dc.identifier.urihttp://hdl.handle.net/2440/27434
dc.language.isoen
dc.publisherCAMBRIDGE UNIV PRESS
dc.source.urihttp://www3.interscience.wiley.com/journal/120702064/abstract
dc.subjectSoil compaction
dc.subjectP uptake
dc.subjectTrifolium subterraneum L.
dc.subjectVA mycorrhiza
dc.titleEffects of soil compaction on phosphorus uptake and growth of Trifolium subterraneum colonized by four species of vesicular-arbuscular mycorrhizal fungi
dc.typeJournal article
pubs.publication-statusPublished

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