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| DOI: | 10.2134/jeq2006.0207 |
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| Web URL(s): | https://dl.sciencesocieties.org/publications/jeq/articles/36/5/1452
Last checked: 11/07/2016
Access conditions: Item is within a limited-access website
https://dl.sciencesocieties.org/publications/jeq/pdfs/36/5/1452
Last checked: 11/08/2016
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Access conditions: Item is within a limited-access website |
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| Publication Type:
| Refereed |
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| Author(s): | Watson, C. J.;
Smith, R. V.;
Matthews, D. I. |
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| Author Affiliation: | Watson and Smith: Agriculture, Food and Environmental Science Division; Matthews: Biometrics Branch, Agri-Food and Biosciences Institute, Belfast, United Kingdom |
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| Title: | Increase in phosphorus losses from grassland in response to Olsen-P accumulation |
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| Section: | Environmental issues
Other records with the "Environmental issues" Section
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| Source: | Journal of Environmental Quality. Vol. 36, No. 5, September/October 2007, p. 1452-1460. |
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| Publishing Information: | Madison, Wisconsin: American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America |
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| # of Pages: | 9 |
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| Keywords: | TIC Keywords: Phosphorus; Leaching; Grasslands; Lolium perenne; Phosphorus fertilizers; Weather patterns; Seasonal variation; Water quality; Drainage; Olsen-P Test
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| Geographic Terms: | Northern Ireland |
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| Abstract/Contents: | "The Olsen-P status of grazed grassland (Lolium perenne L.) swards in Northern Ireland was increased over a 5-yr period (March 2000 to February 2005) by applying different rates of P fertilizer (0, 10, 20, 40, or 80 kg P ha-1 yr-1) to assess the relationship between soil P status and P losses in land drainage water and overland flow. Plots (0.2 ha) were hydrologically isolated and artificially drained to v-notch weirs, with flow proportional monitoring of drainage water and overland flow. Annually, the collectors for overland flow intercepted between 11 and 35% of the surplus rainfall. Single flow events accounted for up to 52% of the annual dissolved reactive phosphorus (DRP) load. The Olsen-P status of the soil influenced DRP and total phosphorus (TP) concentrations in land drainage water and overland flow. Annual TP loss was highly variable and ranged from 0.19 to 1.55 kg P ha-1 yr-1 for the plot receiving no P fertilizer and from 0.35 to 2.94 kg P ha-1 yr-1 for the plot receiving 80 kg P ha-1 yr-1. Despite the Olsen-P status in the soils ranging from 22 to 99 mg P kg-1, after 5 yr of fertilizer P applications it was difficult to identify a clear Olsen-P concentration at which P losses increased. Any relationship was confounded by annual variability of hydrologic events and flows and by hydrologic differences between plots. Withholding P fertilizer for over 5 yr was not long enough to lower P losses or to have an adverse effect on herbage P concentrations." |
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| Language: | English |
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| References: | 36 |
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| Note: | Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Watson, C. J., R. V. Smith, and D. I. Matthews. 2007. Increase in phosphorus losses from grassland in response to Olsen-P accumulation. J. Environ. Qual. 36(5):p. 1452-1460. |
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| DOI: 10.2134/jeq2006.0207 |
| Web URL(s):
https://dl.sciencesocieties.org/publications/jeq/articles/36/5/1452
Last checked: 11/07/2016
Access conditions: Item is within a limited-access website
https://dl.sciencesocieties.org/publications/jeq/pdfs/36/5/1452
Last checked: 11/08/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
| 
MSU catalog number: S 900 .J6 |
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