Effects of physicochemical soil properties of five agricultural soils on herbicide soil adsorption and leaching

Once pesticides reach the soil, there are several factors that affect their soil behavior. To identify the principal soil and herbicide properties that control their adsorption and leaching, a study of five Chilean agricultural and forest soils was performed. Simazine, diuron, terbuthylazine and MCP...

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Autores principales:	Alister,Claudio, Araya,Manuel, Kogan,Marcelo
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería Forestal 2011
Materias:	Diuron fulvic acids humic substances MCPA triazines
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202011000200010
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spelling	oai:scielo:S0718-162020110002000102011-09-01Effects of physicochemical soil properties of five agricultural soils on herbicide soil adsorption and leachingAlister,ClaudioAraya,ManuelKogan,Marcelo Diuron fulvic acids humic substances MCPA triazines Once pesticides reach the soil, there are several factors that affect their soil behavior. To identify the principal soil and herbicide properties that control their adsorption and leaching, a study of five Chilean agricultural and forest soils was performed. Simazine, diuron, terbuthylazine and MCPA were applied to the top of 45-cm tall by 12-cm diameter disturbed soil columns, filled with either an Andisol, Ultisol, Entisol or one of two Inceptisol soils. After herbicide applications, each lysimeter received 24 mm of simulated rain every 24 hours for five days. Once water percolation stopped, the lysimeters were divided into five sections and herbicide concentrations were quantified using High Pressure Liquid Chromatography. Relationships between soil physicochemical properties, herbicide sorption (adsorption and desorption) and herbicide leaching were determined. All herbicides exhibited the least depth reached from the Andisol soil (10 cm) and the highest from the Ultisol soil (45 cm). The principal soil property that affected herbicide adsorption was the soil organic carbon content, specifically the fulvic acid-humins fraction. Soil leaching was related to the inverse of soil adsorption (1/Kd), cation exchange capacity, humic substances content and herbicide pKa. These results suggest that it is possible to develop simple quantitative models to predict the soil-leaching properties of pesticides.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería ForestalCiencia e investigación agraria v.38 n.2 20112011-08-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202011000200010en10.4067/S0718-16202011000200010
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Diuron fulvic acids humic substances MCPA triazines
spellingShingle	Diuron fulvic acids humic substances MCPA triazines Alister,Claudio Araya,Manuel Kogan,Marcelo Effects of physicochemical soil properties of five agricultural soils on herbicide soil adsorption and leaching
description	Once pesticides reach the soil, there are several factors that affect their soil behavior. To identify the principal soil and herbicide properties that control their adsorption and leaching, a study of five Chilean agricultural and forest soils was performed. Simazine, diuron, terbuthylazine and MCPA were applied to the top of 45-cm tall by 12-cm diameter disturbed soil columns, filled with either an Andisol, Ultisol, Entisol or one of two Inceptisol soils. After herbicide applications, each lysimeter received 24 mm of simulated rain every 24 hours for five days. Once water percolation stopped, the lysimeters were divided into five sections and herbicide concentrations were quantified using High Pressure Liquid Chromatography. Relationships between soil physicochemical properties, herbicide sorption (adsorption and desorption) and herbicide leaching were determined. All herbicides exhibited the least depth reached from the Andisol soil (10 cm) and the highest from the Ultisol soil (45 cm). The principal soil property that affected herbicide adsorption was the soil organic carbon content, specifically the fulvic acid-humins fraction. Soil leaching was related to the inverse of soil adsorption (1/Kd), cation exchange capacity, humic substances content and herbicide pKa. These results suggest that it is possible to develop simple quantitative models to predict the soil-leaching properties of pesticides.
author	Alister,Claudio Araya,Manuel Kogan,Marcelo
author_facet	Alister,Claudio Araya,Manuel Kogan,Marcelo
author_sort	Alister,Claudio
title	Effects of physicochemical soil properties of five agricultural soils on herbicide soil adsorption and leaching
title_short	Effects of physicochemical soil properties of five agricultural soils on herbicide soil adsorption and leaching
title_full	Effects of physicochemical soil properties of five agricultural soils on herbicide soil adsorption and leaching
title_fullStr	Effects of physicochemical soil properties of five agricultural soils on herbicide soil adsorption and leaching
title_full_unstemmed	Effects of physicochemical soil properties of five agricultural soils on herbicide soil adsorption and leaching
title_sort	effects of physicochemical soil properties of five agricultural soils on herbicide soil adsorption and leaching
publisher	Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería Forestal
publishDate	2011
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202011000200010
work_keys_str_mv	AT alisterclaudio effectsofphysicochemicalsoilpropertiesoffiveagriculturalsoilsonherbicidesoiladsorptionandleaching AT arayamanuel effectsofphysicochemicalsoilpropertiesoffiveagriculturalsoilsonherbicidesoiladsorptionandleaching AT koganmarcelo effectsofphysicochemicalsoilpropertiesoffiveagriculturalsoilsonherbicidesoiladsorptionandleaching
_version_	1714202132219953152

Effects of physicochemical soil properties of five agricultural soils on herbicide soil adsorption and leaching

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