A multi-regional soil phosphorus balance for exploring secondary fertilizer potential: the case of Norway

Title
A multi-regional soil phosphorus balance for exploring secondary fertilizer potential: the case of Norway
Author(s)
Ola Stedje Hanserud
Eva Brod
Anne Falk Ødegaard
Daniel B. Müller
Helge Brattebø
Year
2015
Source
Nutrient Cycling in Agroecosystems, Volume 104, Issue 3, Pages 307-320
DOI
10.1007/s10705-015-9721-6
Abstract
Phosphate rock is a non-renewable source of phosphorus (P) in mineral fertilizer and many countries need to use P fertilizer more efficiently in food production. This study explored the theoretical fertilizer potential of the P-rich bioresources animal manure and sewage sludge to supply the required P fertilizer for crops. We used Norway as a case study and employed multi-regional substance flow analysis with averaged annual data for the period 2009-2011. In a status quo soil balance for agricultural soil, all counties had a positive balance with a national average of 8.5 (range between counties of 2.7-14.7) kg P ha−1. In addition, two fertilizer regimes (FR) were evaluated for the period; FR1 omitted mineral P fertilizer from the balance and assumed bioresource addition matched plant P offtake regardless of soil available P, while FR2 omitted fertilizer from the balance and adjusted bioresource inputs according to whether soil available P was above (adjusted downwards) or below (adjusted upwards) the optimum soil P level. FR1 and FR2 gave a national average P surplus of 1.2 (range −7.0 to 11.2) and 6.2 (range −2.5 to 19.0) kg P ha−1, respectively. The secondary P fertilizer potential of bioresources for meeting P requirements was found to be underestimated in the short term by not taking into account the actual plant-available soil P level. Our conclusion was that the P fertilizer values of manure and sludge have the theoretical potential to meet the P fertilizer requirements of all Norwegian crops assessed in both the short-term and long-term perspective.
More Information
http://dx.doi.org/10.1007/s10705-015-9721-6

Tags

Back Incorrect or incomplete information? Click here to report this.

This website provides meta data on papers and other publications, with links to the original publications. These papers may be copyrighted or otherwise protected by the publishing journal or author. Some journals provide open access to their publications. When possible we will try to include abstracts and more details for open access publications. For more details, follow the link to the original document and/or contact the publisher/author.