Phosphorus availability for three crop species as a function of soil type and fertilizer history

Vu, Dang T., Armstrong, Roger D., Sale, Peter W. G. and Tang, Caixian (2010) Phosphorus availability for three crop species as a function of soil type and fertilizer history. Plant and Soil, 337 1-2: 497-510. doi:10.1007/s11104-010-0545-5

Author Vu, Dang T.
Armstrong, Roger D.
Sale, Peter W. G.
Tang, Caixian
Title Phosphorus availability for three crop species as a function of soil type and fertilizer history
Journal name Plant and Soil   Check publisher's open access policy
ISSN 0032-079X
Publication date 2010-12
Sub-type Article (original research)
DOI 10.1007/s11104-010-0545-5
Volume 337
Issue 1-2
Start page 497
End page 510
Total pages 14
Place of publication Dordrecht, Netherlands
Publisher Springer
Language eng
Formatted abstract
Knowledge of the capacity of a soil to supply phosphorus (P), and the variation in the ability of different crops to access soil P, is critical to successfully managing P in modern cropping systems. Isotopic dilution techniques were used to examine the capacity of three contrasting soil types (Calcarosol, Vertosol and Chromosol) to supply P, and to compare the ability of three different crop species (wheat, chickpea and canola) to access P under both low and adequate P conditions. This was achieved by measuring L values of the different crops grown for 56 days in 32P-labelled soils with various combinations of history of P fertilisation (native vs. cultivated soils) and recent P addition (none vs. added P). A parallel experiment used these identical soil types/treatments without plants to determine E values. The three soils studied varied in the capacity to supply P to crops. The sandy Calcarosol, on average, had higher E values than other two soils. E-values were generally constant or slightly decreased over 42 d. Adding water-soluble P enhanced E values in all 3 soils. While chickpea absorbed more P from the P-deficient native soils, wheat was superior to either canola or chickpea in acquiring both freshly applied and residual P fertilizer across the three soils. The L values were generally constant over 56 d for all the soils and plant species, although the value was lower at Day 21 compared to later harvests for some treatments. Irrespective of soil type, plant P uptake correlated well with L and E values. Interestingly, wheat and chickpea but not canola had higher L/E ratios when grown in the P-deficient native soils than in other P treatments of Calcarosol and Vertosol. It is concluded that soil type, crop species and P history all affect P acquisition from soil and applied fertilizer, and that both L and E values are reliable indicator of predicting plant-available P in soil.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Chemical Engineering Publications
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Created: Tue, 20 Sep 2011, 16:59:25 EST by Dr Dang Vu on behalf of School of Chemical Engineering