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Phosphorus activators contribute to legacy phosphorus availability in agricultural soils: A review.

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journal contribution
posted on 2018-03-28, 08:57 authored by Jing Zhu, Min Li, Mick Whelan
Phosphorus (P) is one of the most limiting macronutrients for crop productivity and P deficiency is a common phenomenon in agricultural soils worldwide. Despite long-term application of phosphate fertilizers to increase crop yields, P availability is often low, due to the high affinity of phosphate for the soil solid phase. It has been suggested that the accumulated (surplus) P in agricultural soils is sufficient to sustain crop yields worldwide for about 100years. In this paper, we try to clear up the potential for making use of legacy P in soils for crop growth potentially alleviating the global P resource shortage. Specifically, we try to clear up the potential of soil "P activators" for releasing fixed P. P activators accelerate and strengthen process which transform P into bio-available forms via a range of chemical reactions and biological interactions. They include phosphate solubilizing microorganisms, phosphatase enzymes and enzyme activators, low molecular weight organic acids, humic acids, lignin, crop residues, biochar and zeolites. Although reported performance is variable, there is growing evidence that P activators can promote the release of phosphate from soil and, hence, have potential for mitigating the impending global P crisis. Further basic and applied research is required to better understand the mechanisms of interaction of P activators with natural soils and to maximize activator efficacy.

Funding

This work was supported by the National Natural Science Foundation of China (No. 51279004).

History

Citation

Science of the Total Environment, 2018, 612, pp. 522-537

Author affiliation

/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/School of Geography, Geology and the Environment/Physical Geography

Version

  • AM (Accepted Manuscript)

Published in

Science of the Total Environment

Publisher

Elsevier

issn

0048-9697

eissn

1879-1026

Acceptance date

2017-08-10

Copyright date

2017

Available date

2018-09-01

Publisher version

https://www.sciencedirect.com/science/article/pii/S0048969717320934?via=ihub

Notes

The file associated with this record is under embargo until 12 months after publication, in accordance with the publisher's self-archiving policy. The full text may be available through the publisher links provided above.

Language

en

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