Sorption and desorption of indaziflam degradates in several agricultural soils

被引：7

作者：

Alonso, Diego Goncalves ^{[1
]}

de Oliveira, Rubem Silverio, Jr. ^{[1
]}

Koskinen, William Charles ^{[2
]}

Hall, Kathleen ^{[3
]}

Constantin, Jamil ^{[1
]}

Mislankar, Suresh ^{[4
]}

机构：

[1] Univ Estadual Maringa, Ctr Adv Studies Weed Res NAPD, Dept Agron, Av Colombo 579, BR-87020900 Maringa, Parana, Brazil

[2] ARS, USDA, 439 Borlaug Hall,1991 Upper Buford Circle, St Paul, MN 55108 USA

[3] Univ Minnesota, Dept Soil Water & Climate, 439 Borlaug Hall,1991 Upper Buford Circle, St Paul, MN 55108 USA

[4] Bayer Crop Sci LP, Environm Fate & Exposure Assessment, RTP, 2 TW Alexander Dr, Res Triangle Pk, NC 27709 USA

来源：

SCIENTIA AGRICOLA | 2016年 / 73卷 / 02期

关键词：

adsorption; hysteresis; metabolites; soil properties; METABOLITES; ATRAZINE;

D O I：

10.1590/0103-9016-2015-0106

中图分类号：

S [农业科学];

学科分类号：

09 ;

摘要：

Processes regulating pesticide fate in the environment are influenced by the physicochemical properties of pesticides and soils. Sorption and desorption are important processes as they regulate the movement of pesticides in soil. Although sorption-desorption is widely studied for herbicides, studies involving their metabolites in soil are scarce. Sorption and desorption of indaziflam metabolites (indaziflam-triazinediamine (FDAT), indaziflam-triazine-indanone (ITI) and indaziflam-carboxilic acid (ICA)) were investigated in six Brazilian (BRA) soils and three United States (USA) soils with different physicochemical properties. The Freundlich equation described sorption of the metabolites for all soils (R-2 > 0.98; 1/n similar to 1). Sorption order (K-f) was ITI > ICA > FDAT. Mean values of K-f, oc were 453, 289, and 81 (BRA) and 444, 48, and 48 (USA) for metabolites ITI, ICA, and FDAT respectively. Desorption was hysteretic for all metabolites in all soils. These results suggest that these metabolites fall in the classification range of mobile to moderately mobile in soils.

引用

页码：169 / 176

页数：8

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