Elevated CO2 temporally enhances phosphorus immobilization in the rhizosphere of wheat and chickpea
Jian Jin, Caixian Tang, Roger Armstrong, Clayton Butterly, Peter Sale
PLANT AND SOIL | SPRINGER | Published : 2013
Aims: The efficient management of phosphorus (P) in cropping systems remains a challenge due to climate change. We tested how plant species access P pools in soils of varying P status (Olsen-P 3.2-17.6 mg kg-1), under elevated atmosphere CO2 (eCO2). Methods: Chickpea (Cicer arietinum L.) and wheat (Triticum aestivum L.) plants were grown in rhizo-boxes containing Vertosol or Calcarosol soil, with two contrasting P fertilizer histories for each soil, and exposed to ambient (380 ppm) or eCO2 (700 ppm) for 6 weeks. Results: The NaHCO3-extractable inorganic P (Pi) in the rhizosphere was depleted by both wheat and chickpea in all soils, but was not significantly affected by CO2 treatment. However..View full abstract
Awarded by Australian Research Council
This research was supported by an Australian Research Council Linkage Project (LP100200757), and utilised the SoilFACE facility of the Department of Primary Industries, Victoria at Horsham. We thank anonymous reviewers for their comments on the manuscript.