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Effect of P fertiliser application strategy and soil P sorption properties on 'incidental' P fertiliser characteristics using laboratory techniques and long term Bayesian risk modelling

Citation

Dougherty, W and Burkitt, L and Corkrey, R, Effect of P fertiliser application strategy and soil P sorption properties on 'incidental' P fertiliser characteristics using laboratory techniques and long term Bayesian risk modelling, Proceedings of the 19th World Congress of Soil Science; Soil Solutions for a Changing World, 1-6 August , Brisbane, Australia, pp. 268-271. (2010) [Conference Extract]


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Copyright Statement

Copyright © 2010 19th World Congress of Soil Science, Soil Solutions for a Changing World

Official URL: http://www.iuss.org/

Abstract

The occurrence of rainfall and runoff soon after phosphorus (P) fertiliser application (fertiliser ‘incidental’ effect) can increase P exports. In this paper we firstly use a laboratory study to examine the effect of soil properties on the duration of the incidental fertiliser effect. Secondly we examine the effect of P fertiliser strategy – single v split applications – on long-term runoff P risk using laboratory and catchment runoff data in a Bayesian risk model. We found that soil P buffering characteristics have a large effect on the duration of incidental fertiliser effect. Despite the disproportionately large effect of a single application on runoff P concentration compared to split applications, the increased likelihood of runoff and fertiliser application coinciding when fertiliser applications were split, mean that the overall risk of runoff P loss is increased with split fertiliser applications. Farmers should therefore apply P fertiliser in a single annual application and apply this when risk of runoff is low, the importance of this strategy being greatest for farmers on soils with moderate to low P buffering

Item Details

Item Type:Conference Extract
Keywords:phosphorus, incidental, risk, Bayesian, runoff, fertiliser
Research Division:Agricultural and Veterinary Sciences
Research Group:Agriculture, Land and Farm Management
Research Field:Agricultural Land Management
Objective Division:Environment
Objective Group:Soils
Objective Field:Farmland, Arable Cropland and Permanent Cropland Soils
Author:Burkitt, L (Dr Lucy Burkitt)
Author:Corkrey, R (Dr Ross Corkrey)
ID Code:66361
Year Published:2010
Deposited By:Agricultural Science
Deposited On:2011-01-13
Last Modified:2015-02-06
Downloads:0

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