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| DOI: | 10.2134/jeq2006.0169 |
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| Web URL(s): | https://dl.sciencesocieties.org/publications/jeq/articles/36/2/532
Last checked: 11/07/2016
Access conditions: Item is within a limited-access website
https://dl.sciencesocieties.org/publications/jeq/pdfs/36/2/532
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): | Roberson, Tiffany;
Bundy, Larry G.;
Andraski, Todd W. |
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| Author Affiliation: | Department of Soil Science, University of Wisconsin, Madison, Wisconsin |
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| Title: | Freezing and drying effects on potential plant contributions to phosphorus in runoff |
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| Section: | Technical reports: Surface water quality
Other records with the "Technical reports: Surface water quality" Section
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| Source: | Journal of Environmental Quality. Vol. 36, No. 2, March/April 2007, p. 532-539. |
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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: | 8 |
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| Keywords: | TIC Keywords: Freezing; Drying; Phosphorus; Surface runoff; Water quality; Medicago sativa; Elymus repens; Herbicides
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| Abstract/Contents: | "Phosphorus (P) in runoff from landscapes can promote eutrophication of natural waters. Soluble P released from plant material can contribute significant amounts of P to runoff particularly after plant freezing or drying. This study was conducted to evaluate P losses from alfalfa or grass after freezing or drying as potential contributors to runoff P. Alfalfa (Medicago sativa L.) and grass (principally, Agropyron repens L.) plant samples were subjected to freezing and drying treatments to determine P release. Simulated rainfall runoff and natural runoff from established alfalfa fields and a grass waterway were collected to study P contributions from plant tissue to runoff. The effects of freezing and drying on P released from plant tissue were simulated by a herbicide treatment in selected experiments. Soluble reactive P (SP) extracted from alfalfa and grass samples was markedly increased by freezing or drying. In general, SP extracted from plant samples increased in the order fresh < frozen < frozen/thawed < dried, and averaged 1, 8, 14, and 26% of total P in alfalfa, respectively. Soluble reactive P extracted from alfalfa after freezing or drying increased with increasing soil test P (r2 = 0.64 to 0.68), suggesting that excessive soil P levels increased the risk of plant P contributions to runoff losses. In simulated rainfall studies, paraquat (1,1'-dimethyl-4, 4''-bipyridinium ion) treatment of alfalfa increased P losses in runoff, and results suggested that this treatment simulated the effects of drying on plant P loss. In contrast to the simulated rainfall results, natural runoff studies over 2 yr did not show higher runoff P losses that could be attributed to P from alfalfa. Actual P losses likely depend on the timing and extent of plant freezing and drying and of precipitation events after freezing." |
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| Language: | English |
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| References: | 24 |
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| Note: | Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Roberson, T., L. G. Bundy, and T. W. Andraski. 2007. Freezing and drying effects on potential plant contributions to phosphorus in runoff. J. Environ. Qual. 36(2):p. 532-539. |
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| DOI: 10.2134/jeq2006.0169 |
| Web URL(s):
https://dl.sciencesocieties.org/publications/jeq/articles/36/2/532
Last checked: 11/07/2016
Access conditions: Item is within a limited-access website
https://dl.sciencesocieties.org/publications/jeq/pdfs/36/2/532
Last checked: 11/08/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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MSU catalog number: S 900 .J6 |
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