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https://hdl.handle.net/1959.11/2755
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DC Field | Value | Language |
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dc.contributor.author | Wang, X. | en |
dc.contributor.author | Lester, D. W. | en |
dc.contributor.author | Guppy, Christopher | en |
dc.contributor.author | Lockwood, Peter Vincent | en |
dc.contributor.author | Tang, C. | en |
dc.date.accessioned | 2009-10-29T16:33:00Z | - |
dc.date.issued | 2007 | - |
dc.identifier.citation | Australian Journal of Soil Research, 45(7), p. 524-532 | en |
dc.identifier.issn | 0004-9573 | en |
dc.identifier.issn | 1446-568X | en |
dc.identifier.issn | 1838-6768 | en |
dc.identifier.issn | 1838-675X | en |
dc.identifier.uri | https://hdl.handle.net/1959.11/2755 | - |
dc.description.abstract | Long-term removal of grain P and soil test data suggested that the Colwell phosphorus (P) extraction from the surface 0.10 m of a Black Vertosol from south-eastern Queensland was a poor indicator of run-down of soil P pools. We proposed that plants were also accessing P from layers below 0.10 m or from surface soil P pools not extracted by the Colwell extraction. Both topsoil and subsoil samples in 1994 and 2003 were collected from nil and 20 kg P/ha per crop treatments in a long-term N × P field experiment established in 1985 for detailed P fractionation. An uncropped reference soil was also taken in 2003 from an adjacent area. The long-term effect of the field treatments on soil P fractions was evaluated by comparing the reference site, which was assumed to represent the original soil condition, to the 2003 samples. Without addition of P fertiliser, 55%, 35%, and 10% of total P removal were from 0 to 0.10, 0.10 to 0.30, and 0.30 to 0.60 m, respectively, compared with the uncropped reference soil. Labile fractions comprising resin, bicarbonate, and hydroxide pools in the top 0.10 m decreased by approximately 60% and accounted for 15% of the total P decrease from 0 to 0.60 m depth. Acid and residual-P fractions decreased by 50% and 20%, respectively, and accounted for ~20% and 15% of the total P decrease. In contrast, P addition at 20 kg P/ha per crop over 18 crops doubled the resin and bicarbonate inorganic P (NaHCO³-Pi) pools in the surface 0.10 m. Hydroxide (NaOH-Pi) and acid extracted inorganic P increased by 25% and 10%, respectively, while the residual-P pool decreased by about 15%. Below 0.10 m, very little P was removed by the first 3 extractants. Most of the P was present in the acid and residual fractions irrespective of fertiliser application. The acid and residual-P dropped by 30% and 12%, respectively, at 0.10–0.30 m and 12% and 8% at 0.30–0.60 m. When comparing the experimental soil samples in 2003 with those in 1994, similar trends were observed in the changes of each soil P fraction. In the surface 0.10 m, acid and residual-P pools decreased greatly and explained almost all of the total P decrease in the surface soil without P input. With P addition, labile pools acted as the main sink for P. The acid pool increased by 7%, while the residual-P showed a decrease in the topsoil. Total P level was elevated noticeably in this soil layer. However, at 0.10–0.30 m depth, acid and residual pools were the dominant fractions and decreased significantly irrespective of P fertiliser addition. Below 0.30 m, no significant changes were detected for each fraction and total P. The results suggest that crops had accessed significant amounts of P at 0.10–0.30 m depth irrespective of P fertiliser application, and that subsoil sampling (0.10–0.30 m) should be considered in order to improve the monitoring of soil P status. However, choice of appropriate extractants for monitoring subsoil P reserves is yet to be undertaken. | en |
dc.language | en | en |
dc.publisher | CSIRO Publishing | en |
dc.relation.ispartof | Australian Journal of Soil Research | en |
dc.title | Changes in phosphorus fractions at various soil depths following long-term P fertiliser application on a Black Vertosol from south-eastern Queensland | en |
dc.type | Journal Article | en |
dc.identifier.doi | 10.1071/SR07069 | en |
dc.subject.keywords | Soil Chemistry (excl Carbon Sequestration Science) | en |
local.contributor.firstname | X. | en |
local.contributor.firstname | D. W. | en |
local.contributor.firstname | Christopher | en |
local.contributor.firstname | Peter Vincent | en |
local.contributor.firstname | C. | en |
local.subject.for2008 | 050304 Soil Chemistry (excl Carbon Sequestration Science) | en |
local.subject.seo2008 | 820507 Wheat | en |
local.profile.school | School of Environmental and Rural Science | en |
local.profile.school | School of Environmental and Rural Science | en |
local.profile.email | cguppy@une.edu.au | en |
local.profile.email | plockwoo@une.edu.au | en |
local.output.category | C1 | en |
local.record.place | au | en |
local.record.institution | University of New England | en |
local.identifier.epublicationsrecord | pes:5415 | en |
local.publisher.place | Australia | en |
local.format.startpage | 524 | en |
local.format.endpage | 532 | en |
local.identifier.scopusid | 36049042268 | en |
local.peerreviewed | Yes | en |
local.identifier.volume | 45 | en |
local.identifier.issue | 7 | en |
local.contributor.lastname | Wang | en |
local.contributor.lastname | Lester | en |
local.contributor.lastname | Guppy | en |
local.contributor.lastname | Lockwood | en |
local.contributor.lastname | Tang | en |
dc.identifier.staff | une-id:cguppy | en |
dc.identifier.staff | une-id:plockwoo | en |
local.profile.orcid | 0000-0001-7274-607X | en |
local.profile.role | author | en |
local.profile.role | author | en |
local.profile.role | author | en |
local.profile.role | author | en |
local.profile.role | author | en |
local.identifier.unepublicationid | une:2831 | en |
dc.identifier.academiclevel | Academic | en |
dc.identifier.academiclevel | Academic | en |
local.title.maintitle | Changes in phosphorus fractions at various soil depths following long-term P fertiliser application on a Black Vertosol from south-eastern Queensland | en |
local.output.categorydescription | C1 Refereed Article in a Scholarly Journal | en |
local.relation.url | http://nla.gov.au/anbd.bib-an923638 | en |
local.search.author | Wang, X. | en |
local.search.author | Lester, D. W. | en |
local.search.author | Guppy, Christopher | en |
local.search.author | Lockwood, Peter Vincent | en |
local.search.author | Tang, C. | en |
local.uneassociation | Unknown | en |
local.year.published | 2007 | en |
Appears in Collections: | Journal Article |
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