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Web URL(s):https://dl.sciencesocieties.org/publications/jeq/articles/32/6/2319
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https://dl.sciencesocieties.org/publications/jeq/pdfs/32/6/2319
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Publication Type:
i
Refereed
Author(s):Krutz, L. J.; Senseman, S. A.; Dozier, M. C.; Hoffman, D. W.; Tierney, D. P.
Author Affiliation:Krutz and Senseman: Department of Soil and Crop Science, Texas Agricultural Experiment Station, Texas A & M University, College Station, Texas; Dozier: Department of Soil and Crop Science, Texas Cooperative Extension, Texas A & M University, College Station, Texas; Hoffman: Blackland Research Center, Texas Agricultural Experiment Station, Temple, Texas; Tierney: Environmental Stewardship and Regulatory Policy, Syngenta Crop Protection, Greensboro, North Carolina
Title:Infiltration and adsorption of dissolved atrazine and atrazine metabolites in buffalograss filter strips
Section:Surface water quality
Other records with the "Surface water quality" Section
Source:Journal of Environmental Quality. Vol. 32, No. 6, November/December 2003, p. 2319-2324.
Publishing Information:Madison, Wisconsin: American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
# of Pages:6
Keywords:TIC Keywords: Filter strips; Herbicides; Agriculture; Atrazine; Bouteloua dactyloides; Surface runoff; Metabolites; Infiltration; Adsorption
Abstract/Contents:"Vegetated filter strips (VFS) potentially reduce the off-site movement of herbicides from adjacent agricultural fields by increasing herbicide mass infiltrated (Minf) and mass adsorbed (Mas) compared with bare field soil. However, there are conflicting reports in the literature concerning the contribution of Mas to the VFS herbicide trapping efficiency (TE). Moreover, no study has evaluated TE among atrazine (6-chloro-N-ethyl-N'-isopropyl-[1,3,5]triazine-2,4< >-diamine) and atrazine metabolites. This study was conducted to compare TE, Minf, and Mas among atrazine, diaminoatrazine (DA, 6-chloro-[1,3,5]triazine-2,4-diamine), deisopropylatrazine (DIA, 6-chloro-N-ethyl-[1,3,5]triazine-2,4-diamine), desethylatrazine (DEA, 6-chloro-N-isopropyl-[1,3,5]triazine-2,4-diamine), and hydroxyatrazine (HA, 6-hydroxy-N-ethyl-N'-isopropyl-[1,3,5]triazine-2,4< >-diamine) in a buffalograss VFS. Runoff was applied as a point source upslope of a 1- X 3-m microwatershed plot at a rate of 750 L h-1. The point source was fortified at 0.1 μg mL-1 atrazine, DA, DIA, DEA, and HA. After crossing the length of the plot, water samples were collected at 5-min intervals. Water samples were extracted by solid phase extraction and analyzed by high performance liquid chromatography (HPLC) photodiode array detection. During the 60-min simulation, TE was significantly greater for atrazine (22.2%) compared with atrazine metabolites (19%). Approximately 67 and 33% of the TE was attributed to Minf and Mas, respectively. These results demonstrate that herbicide adsorption to the VFS grass, grass thatch, and/or soil surface is an important retention mechanism, especially under saturated conditions. Values for Mas were significantly higher for atrazine compared with atrazine's metabolites. The Mas data indicate that atrazine was preferentially retained by the VFS grass, grass thatch, and/or soil surface compared with atrazine's metabolites."
Language:English
References:28
Note:Tables
Graphs
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Krutz, L. J., S. A. Senseman, M. C. Dozier, D. W. Hoffman, and D. P. Tierney. 2003. Infiltration and adsorption of dissolved atrazine and atrazine metabolites in buffalograss filter strips. J. Environ. Qual. 32(6):p. 2319-2324.
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Web URL(s):
https://dl.sciencesocieties.org/publications/jeq/articles/32/6/2319
    Last checked: 11/07/2016
    Access conditions: Item is within a limited-access website
https://dl.sciencesocieties.org/publications/jeq/pdfs/32/6/2319
    Last checked: 11/08/2016
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
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