The aim of this study was to examine the fate of quaternary herbicides in soil deposits derived from erosion of vineyard-devoted soils. Herbicide occurrence in the crop soils was due to the farmer application inputs. Special attention should be paid to the presence of paraquat (PQ) in the studied vineyard-devoted soils. The major factor governing the sorption of PQ was the solid state organic fraction with the clay mineral content also making a significant contribution. The mobilization and transport of quats-enriched soil particles may generate downslope and downstream environmental problems that mainly affect detritivore ecology.
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http://dx.doi.org/10.1007/s00128-008-9403-z | DOI Listing |
Plant Physiol Biochem
July 2018
Departamento de Solos, Centro de Ciências Rurais, Universidade Federal de Santa Maria (UFSM), Santa Maria, RS, Brazil.
High copper (Cu) soil contents, due to the continuous vineyard application of Cu fungicides throughout the years, may impair the growth of the shoot and modify the structure of the root system. The current study aimed to investigate the threshold levels of available Cu in the soil causing toxicity effects in young grapevine plants of 'Red Niagara' cultivated in clay soils. Grapevine plantlets were cultivated in pots containing vineyard devoted soils with increasing contents of available Cu (25, 80, 100 and 165 mg kg), for 53 days.
View Article and Find Full Text PDFJ Hazard Mater
June 2010
Soil and Agricultural Science Group, Plant Biology and Soil Science Department, Faculty of Food Science and Technology, University of Vigo, Ourense Campus, E32400 Ourense, Spain.
Mobility of agrochemicals in soils plays an important role in the fate and transport of contaminants in the environment. Competitive and non-competitive sorption experiments of three ammonium quaternary herbicides (paraquat, diquat and difenzoquat) onto eight vineyard soils was measured in batch experiments. Non-competitive experiments show that paraquat (PQ) is the most strongly adsorbed (70-97% of added PQ) followed by diquat (DQ) and difenzoquat (DFQ).
View Article and Find Full Text PDFJ Colloid Interface Sci
May 2009
Soil and Agricultural Science Group, Plant Biology and Soil Science Department, Faculty of Food Science and Technology, University of Vigo, Ourense Campus, E32400 Ourense, Spain.
Herbicide soil/solution distribution coefficients (K(d)) are used in mathematical models to predict the movement of herbicides in soil and groundwater. Herbicides bind to various soil constituents to differing degrees. The universal soil colloid that binds most herbicides is organic matter; however metallic hydrous oxides might also have some influence.
View Article and Find Full Text PDFBull Environ Contam Toxicol
May 2008
Soil and Agricultural Science Group, Plant Biology and Soil Science Department, Faculty of Food Science and Technology, University of Vigo, Ourense Campus, Ourense E32400, Spain.
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