NDLI: A new sludge-derived organo-mineral fertilizer gives similar crop yields as conventional fertilizers

Content Provider	Springer Nature Link
Author	Deeks, Lynda K. Chaney, Keith Murray, Charles Sakrabani, Ruben Gedara, Sidath Le, Minh S. Tyrrel, Sean Pawlett, Mark Read, Robert Smith, Grace H
Copyright Year	2013
Abstract	Sewage sludge, a waste material commonly known as biosolids, has good potential as a valuable agricultural resource, providing that its nutrient imbalances could be overcome. Sewage sludge is rich in phosphorus but low in nitrogen and potassium. Technology exists to supplement sewage sludge with mineral fertilizers, such as urea and muriate of potash as sources of nitrogen and potassium, respectively, to produce an organo-mineral fertilizer with balanced crop nutrient requirements. Here, an experimental plot trial set up in 2008 was established at Broxton, Cheshire, UK, to compare crop yield response for typical crop varieties. Crops included wheat, oilseed rape, barley, beans and forage maize, treated with conventional fertilizer and organo-mineral fertilizer. The organo-mineral fertilizer is a nutrient-balanced sludge-based product produced by drying digested sewage sludge cake at 80 °C in a tumbling evaporator, which produces sludge granules of 3–6 mm in diameter. Analysis was carried out on soil NPK and crop yield. N use efficiency was measured to assess N uptake. Results show that there is no significant difference in crop yield between treatments over the three trial years, with the exception of one crop. This finding demonstrates that the new organo-fertilizer is as efficient as conventional fertilizers. Moreover, levels of heavy metal in soil did not exceed permissible levels. The novelty of this research lies in the fact that it is the first field scale trial of a modified sewage sludge product that has the potential to transform a hitherto waste product into a practical fertilizer product. We conclude that the organo-mineral fertilizer is a promising alternative product for sustainable agriculture.
Starting Page	539
Ending Page	549
Page Count	11
File Format	PDF
ISSN	17740746
Journal	Agronomy for Sustainable Development
Volume Number	33
Issue Number	3
e-ISSN	17730155
Language	English
Publisher	Springer-Verlag
Publisher Date	2013-02-08
Publisher Institution	Institut National de la Recherche Agronomique (INRA)
Publisher Place	Paris
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Organo-mineral fertilizer Conventional fertilizer Biosolids Crop yield Nutrients Agriculture Soil Science & Conservation Sustainable Development
Content Type	Text
Resource Type	Article
Subject	Environmental Engineering Agronomy and Crop Science

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