dc.contributor.author |
Chen, C. R. |
en |
dc.contributor.author |
Hou, E. Q. |
en |
dc.contributor.author |
Condron, L. M. |
en |
dc.contributor.author |
Bacon, G. |
en |
dc.contributor.author |
Esfandbod, M. |
en |
dc.contributor.author |
Olley, J. |
en |
dc.contributor.author |
Turner, Benjamin L. |
en |
dc.date.accessioned |
2015-05-15T12:50:33Z |
|
dc.date.available |
2015-05-15T12:50:33Z |
|
dc.date.issued |
2015 |
|
dc.identifier.citation |
Chen, C. R., Hou, E. Q., Condron, L. M., Bacon, G., Esfandbod, M., Olley, J., and Turner, Benjamin L. 2015. "<a href="https%3A%2F%2Frepository.si.edu%2Fhandle%2F10088%2F26266">Soil phosphorus fractionation and nutrient dynamics along the Cooloola coastal dune chronosequence, southern Queensland, Australia</a>." <em>Geoderma</em>. 257/258:4–13. <a href="https://doi.org/10.1016/j.geoderma.2015.04.027">https://doi.org/10.1016/j.geoderma.2015.04.027</a> |
en |
dc.identifier.issn |
0016-7061 |
|
dc.identifier.uri |
http://hdl.handle.net/10088/26266 |
|
dc.description.abstract |
The amounts and forms of soil phosphorus (P) follow predictable patterns during long-term pedogenesis, but have rarely been examined along subtropical chronosequences. We quantified changes in soil nutrient stocks, foliar nutrient concentrations, and the chemical forms of soil P along the Cooloola chronosequence, a series of coastal dunes spanning ca. 500,000 years of pedogenesis in subtropical Queensland. The total P stock in the upper 30 cm of the soil profile declined continuously with soil age, from 229 237 kg ha- 1 on the youngest soils (40 years old) to 24 28 kg ha- 1 on the oldest soils (195 > 460 ka). In contrast, total carbon (C) and nitrogen (N) stocks increased initially along the chronosequence and then declined in the oldest soils. As a consequence, soil N:P ratios increased continually throughout the sequence, from = 4 on the youngest soils to 27 30 on the oldest soils. This indication of increasing biological P stress and ultimately P limitation was further supported by a decline in foliar P concentrations and increasing foliar N:P ratios of two common plant genera along the chronosequence. Sequential P fractionation revealed that although all forms of P declined during pedogenesis, young soils contained low concentrations of primary mineral P and relatively high concentrations of occluded P associated with secondary minerals, suggesting that the parent sand originated from strongly-weathered continental soils. We conclude that the Cooloola chronosequence is an important example of long-term ecosystem development under a subtropical climate, although the pre-weathered nature of the parent sand indicates that the sequence represents a modification of the Walker and Syers model of P transformations during pedogenesis. |
en |
dc.relation.ispartof |
Geoderma |
en |
dc.title |
Soil phosphorus fractionation and nutrient dynamics along the Cooloola coastal dune chronosequence, southern Queensland, Australia |
en |
dc.type |
Journal Article |
en |
dc.identifier.srbnumber |
135932 |
|
dc.identifier.doi |
10.1016/j.geoderma.2015.04.027 |
|
rft.jtitle |
Geoderma |
|
rft.volume |
257/258 |
|
rft.spage |
4 |
|
rft.epage |
13 |
|
dc.description.SIUnit |
STRI |
en |
dc.description.SIUnit |
Peer-reviewed |
en |
dc.description.SIUnit |
si-federal |
en |
dc.citation.spage |
4 |
|
dc.citation.epage |
13 |
|