Nitrogen and phosphorus availability following topsoil application of mineral and organomineral fertilisers (OMF)

Antille, D. L. and Sakrabani, R. and Godwin, R. J. (2012) Nitrogen and phosphorus availability following topsoil application of mineral and organomineral fertilisers (OMF). In: American Society of Agricultural and Biological Engineers Annual International Meeting (ASABE 2012), 29 Jul-1 Aug 2012, Dallas, TX. United States.

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Abstract

The aim of this study was to determine the availability of N and P resulting from the soil application of a novel organomineral fertiliser (OMF15 - 15:4:4) reported in earlier studies, in comparison with urea (46% N) and single superphosphate (SSP - 0:18:0). A sandy loam and a clay loam soils were incubated over a period of 90 days at 25 degrees Celsius. N and P (as P2O5) were applied at rates equivalent to 0 (control), 150 and 300kg ha-1 and the soils maintained near field capacity. The majority of the N was released from OMF15 within 30 from application (range 40%-72% of total OMF-N applied) with a further 10% to 28% in the following 60 to 90 days. OMF15 required an accumulated thermal time of 2250 d°C to release between 68% and 79% of the total OMF-N applied. From this, it was suggested that mineralisation of the organic-N fraction in the OMF would progress beyond the harvest of winter cereal crops in-field conditions in the UK. The availability of P from OMF15 was low throughout the experiment ranging from -5.6% to 6.4% (% of total OMF-P applied). Despite this, a change in soil-P index from 5 to 6 was observed after the 90 days incubation period but the overall increase in soil-P status was marginal in both soils. For SSP, P-availability ranged from 16% to 46% (% of total SSP-P applied). The application of SSP induced a significant (p<0.001) increase in soil-P levels compared with the controls which led to an overall increase in soil-P index from 5 to 6. The results of this study aided the development of a strategy for the use of OMF in winter cereal crops.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: No
Item Status: Live Archive
Additional Information: © (2012) by the American Society of Agricultural & Biological Engineers. For information about securing permission to reprint or reproduce a technical presentation, please contact ASABE at rutter@asabe.org or 269-932-7004 (2950 Niles Road, St. Joseph, MI 49085-9659 USA). Paper # 121340682
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering
Date Deposited: 08 Jul 2014 04:39
Last Modified: 15 Sep 2017 03:59
Uncontrolled Keywords: clay loam soils; in-field; incubation periods; mineralisation; near fields; organominerals; sandy loams; single superphosphate; soil applications; winter cereals
Fields of Research : 07 Agricultural and Veterinary Sciences > 0703 Crop and Pasture Production > 070306 Crop and Pasture Nutrition
05 Environmental Sciences > 0503 Soil Sciences > 050304 Soil Chemistry (excl. Carbon Sequestration Science)
07 Agricultural and Veterinary Sciences > 0799 Other Agricultural and Veterinary Sciences > 079902 Fertilisers and Agrochemicals (incl. Application)
Socio-Economic Objective: D Environment > 96 Environment > 9614 Soils > 961402 Farmland, Arable Cropland and Permanent Cropland Soils
Identification Number or DOI: doi:10.13031/2013.41937
URI: http://eprints.usq.edu.au/id/eprint/25436

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