La Trobe
2014Jin et al. Plant Soil 374, 109.pdf (439.14 kB)

Nitrogen form but not elevated CO2 alters plant phosphorus acquisition from sparingly soluble phosphorus sources

Download (439.14 kB)
journal contribution
posted on 05.01.2021, 04:57 by Jian Jin, Caixian Tang, T Hogarth, Roger Armstrong, Peter Sale
Background and aims: Maintaining nutrient supply, including phosphorus (P), is critical to ensure the adaptation of cropping systems to future elevated CO2 (eCO2) environments. There is much speculation about the role of sparingly soluble sources to supply plants with P so we tested the hypothesis that eCO2 increases plant's ability to utilise P from sparingly soluble sources via affecting rhizosphere properties. Methods: Chickpea and wheat were grown for 6 weeks in washed sand supplied with 40 mg P kg-1 as either readily soluble Ca(H2PO4)2 or sparingly soluble AlPO4 (Al-P), FePO4 or hydroxyapatite (HAP). Half plants were exposed to eCO2 (700 ppm) while the others to ambient CO2 (380 ppm). Results: Elevated CO2 increased biomass production of both species but did not influence P concentration in plants, rhizosphere pH or Olsen P. Among the sparingly soluble P sources, HAP resulted in the maximum biomass and total P uptake in wheat and chickpea with wheat acquiring more P. Supply of nitrate, as compared to urea, to wheat decreased the uptake of P from HAP but increased it from Al-P. Conclusion: Elevated CO2 does not specifically affect plant access to P from sparingly soluble P sources. Urea facilitates P acquisition from HAP whereas nitrate facilitates it from Al-P. © 2013 Springer Science+Business Media Dordrecht.

History

Publication Date

01/01/2014

Journal

Plant and Soil: international journal on plant-soil relationships

Volume

374

Issue

1

Pagination

11p. (p. 109-119)

Publisher

Springer Verlag (Germany)

ISSN

0032-079X

Rights Statement

The Author reserves all moral rights over the deposited text and must be credited if any re-use occurs. Documents deposited in OPAL are the Open Access versions of outputs published elsewhere. Changes resulting from the publishing process may therefore not be reflected in this document. The final published version may be obtained via the publisher’s DOI. Please note that additional copyright and access restrictions may apply to the published version.