2017Jin et al. Plant Soil 419, 257.pdf (378.34 kB)
Long-term impact of elevated CO2 on phosphorus fractions varies in three contrasting cropping soils
journal contributionposted on 2021-01-07, 02:53 authored by Jian JinJian Jin, Roger ArmstrongRoger Armstrong, Caixian TangCaixian Tang
© 2017, Springer International Publishing AG. Background and aim: The long-term effect of elevated CO2 (eCO2) on P biogeochemistry in farming systems is largely unknown. This study compared the effects of eCO2 on P fractions in three contrasting soils after growing crops for seven years. Methods: An experiment of free-air-CO2-enrichment (FACE) was conducted with a rotation of wheat, field pea and canola grown in intact cores of Chromosol, Vertosol and Calcarosol under ambient CO2 (aCO2) (390 ± 10 ppm) or eCO2 (550 ± 30 ppm). Crop P removal, soil P fractions and biochemical properties were determined. Results: Elevated CO2 resulted in extra 134, 91 and 93 mg P core−1 removed as grains, compared to aCO2, for Chromosol, Vertosol and Calcarosol, respectively. It decreased the concentration of NaHCO3-extractable inorganic P (by 17–36%), and decreased NaOH-extractable inorganic P by 24% in Chromosol, and 77% in Vertosol but did not affect it in Calcarosol. Elevated CO2 also decreased NaOH-extractable organic P by 20, 12 and 7 mg kg−1 in the three soils, respectively. Furthermore, eCO2 decreased soil organic carbon (by 8.2%) and increased microbial biomass carbon and respiration in Chromosol but not in other two soils. Conclusion: Long-term eCO2 favoured microbial mineralization of organic P in Chromosol and chemical mobilization of non-labile inorganic P in all three soils.
JournalPlant and Soil
Pagination11p. (p. 257-267)
Rights StatementThe 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.
CategoriesNo categories selected
Science & TechnologyLife Sciences & BiomedicineAgronomyPlant SciencesSoil ScienceAgricultureC/P ratioFaceHigh atmospheric CO2Microbial processesP fractionationP removalSoil organic CORGANIC PHOSPHORUSATMOSPHERIC CO2CARBON-DIOXIDECLIMATE-CHANGEP-FRACTIONSBIOAVAILABILITYMINERALIZATIONAVAILABILITYMOBILIZATIONCOMMUNITIESAgronomy & Agriculture