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Published online 7 May 2007
Published in J Environ Qual 36:826-831 (2007)
DOI: 10.2134/jeq2006.0477
© 2007 American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Atrazine Degradation and Residues Distribution in Two Acid Soils from Temperate Humid Zone

J. Mahía and M. Díaz-Raviña*

Departamento de Bioquímica del suelo, Instituto de Investigaciones Agrobiológicas de Galicia (CSIC), Avda Vigo s/n, Apartado 122, E-15780 Santiago de Compostela, Spain


Figure 1
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  		Fig. 1. Evolution of atrazine (A), deisopropylatrazine (DIA), and hydroxyatrazine (HA) in the extractable fraction of two contrasting agricultural soils (MP and G) added with 5 µg kg–1 atrazine and incubated during 12 wk (mean values ± SE of three incubation replicates). Deethylatrazine was not detected.

 

Figure 2
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  		Fig. 2. Mineralization of (U-13C-ring) atrazine on a percentage basis in two contrasting agricultural soils (MP and G soils) added with 5 µg kg–1 atrazine and incubated during 12 wk (mean values ± SE of three incubation replicates).

 

Figure 3
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  		Fig. 3. Putative pathway of atrazine degradation in two contrasting agricultural soils (MP and G) from temperate humid zone (NW Spain). Dominant (thick arrow), probable (thin arrow) and non-probable (dotted arrow) routes are indicated.

 

Figure 4
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  		Fig. 4. Distribution of atrazine in mineralized, extractable, and "bound residues" fractions on a percentage basis in two contrasting agricultural soils (MP and G soils) over the 12-wk incubation period.

 




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