Morphophysical pedotransfer functions for groundwater pollution by nitrate leaching in Central Chile

Nitrate leaching (NL) is a major concern in agriculture due to its impact on human health and ecosystems. Solute movement through soil is governed by various hydraulic and physical properties that determine water flow. To study such relationships, a pedotransfer function of groundwater pollution was...

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Autores principales:	Fuentes,Ignacio, Casanova,Manuel, Seguel,Oscar, Nájera,Francisco, Salazar,Osvaldo
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2014
Materias:	Nitrate leaching index preferential flow soil hydraulic properties
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392014000300013
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spelling	oai:scielo:S0718-583920140003000132018-10-01Morphophysical pedotransfer functions for groundwater pollution by nitrate leaching in Central ChileFuentes,IgnacioCasanova,ManuelSeguel,OscarNájera,FranciscoSalazar,Osvaldo Nitrate leaching index preferential flow soil hydraulic properties Nitrate leaching (NL) is a major concern in agriculture due to its impact on human health and ecosystems. Solute movement through soil is governed by various hydraulic and physical properties that determine water flow. To study such relationships, a pedotransfer function of groundwater pollution was developed in two alluvial irrigated soils under long-term pig slurry applications. Two basins of central Chile, San Pedro (Typic Xerochrepts) and Pichidegua (Mollic Xerofluvents) were selected, where maize (Zea mays L.) was grown in spring-summer, while during autumn-winter period a ryegrass-barley-oat mixed crop was established in San Pedro and a fallow management applied in Pichidegua. Soils in cultivated and control sites were characterized in physical and hydraulic terms. Nitrogen and water budgets were determined measuring periodically (biweekly) N concentration (N-NO3- and N-NH4+) and monitoring water contents in soil profiles, respectively. Dye tracer tests were performed with brilliant blue (BB) dye and the staining patterns analyzed. To contrast the effect of slurry additions over soil physical properties and over NL, t-Student tests were performed. Some accurate pollution groundwater NL pedotransfer functions were obtained calculated through least square fit models and artificial neural networks. Textural porosity, mean diameter variation, slow drainage porosity, air conductivity at 33 kPa water tension and N-NO3- concentrations were directly related to NL. In terms of preferential flow analysis, stained path width > 200 mm was inversely associated to NL. Finally, dye tracer tests provided a better understanding of the characteristics and pattern of water/solute movement through soil to groundwater.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.74 n.3 20142014-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392014000300013en10.4067/S0718-58392014000300013
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Nitrate leaching index preferential flow soil hydraulic properties
spellingShingle	Nitrate leaching index preferential flow soil hydraulic properties Fuentes,Ignacio Casanova,Manuel Seguel,Oscar Nájera,Francisco Salazar,Osvaldo Morphophysical pedotransfer functions for groundwater pollution by nitrate leaching in Central Chile
description	Nitrate leaching (NL) is a major concern in agriculture due to its impact on human health and ecosystems. Solute movement through soil is governed by various hydraulic and physical properties that determine water flow. To study such relationships, a pedotransfer function of groundwater pollution was developed in two alluvial irrigated soils under long-term pig slurry applications. Two basins of central Chile, San Pedro (Typic Xerochrepts) and Pichidegua (Mollic Xerofluvents) were selected, where maize (Zea mays L.) was grown in spring-summer, while during autumn-winter period a ryegrass-barley-oat mixed crop was established in San Pedro and a fallow management applied in Pichidegua. Soils in cultivated and control sites were characterized in physical and hydraulic terms. Nitrogen and water budgets were determined measuring periodically (biweekly) N concentration (N-NO3- and N-NH4+) and monitoring water contents in soil profiles, respectively. Dye tracer tests were performed with brilliant blue (BB) dye and the staining patterns analyzed. To contrast the effect of slurry additions over soil physical properties and over NL, t-Student tests were performed. Some accurate pollution groundwater NL pedotransfer functions were obtained calculated through least square fit models and artificial neural networks. Textural porosity, mean diameter variation, slow drainage porosity, air conductivity at 33 kPa water tension and N-NO3- concentrations were directly related to NL. In terms of preferential flow analysis, stained path width > 200 mm was inversely associated to NL. Finally, dye tracer tests provided a better understanding of the characteristics and pattern of water/solute movement through soil to groundwater.
author	Fuentes,Ignacio Casanova,Manuel Seguel,Oscar Nájera,Francisco Salazar,Osvaldo
author_facet	Fuentes,Ignacio Casanova,Manuel Seguel,Oscar Nájera,Francisco Salazar,Osvaldo
author_sort	Fuentes,Ignacio
title	Morphophysical pedotransfer functions for groundwater pollution by nitrate leaching in Central Chile
title_short	Morphophysical pedotransfer functions for groundwater pollution by nitrate leaching in Central Chile
title_full	Morphophysical pedotransfer functions for groundwater pollution by nitrate leaching in Central Chile
title_fullStr	Morphophysical pedotransfer functions for groundwater pollution by nitrate leaching in Central Chile
title_full_unstemmed	Morphophysical pedotransfer functions for groundwater pollution by nitrate leaching in Central Chile
title_sort	morphophysical pedotransfer functions for groundwater pollution by nitrate leaching in central chile
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2014
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392014000300013
work_keys_str_mv	AT fuentesignacio morphophysicalpedotransferfunctionsforgroundwaterpollutionbynitrateleachingincentralchile AT casanovamanuel morphophysicalpedotransferfunctionsforgroundwaterpollutionbynitrateleachingincentralchile AT segueloscar morphophysicalpedotransferfunctionsforgroundwaterpollutionbynitrateleachingincentralchile AT najerafrancisco morphophysicalpedotransferfunctionsforgroundwaterpollutionbynitrateleachingincentralchile AT salazarosvaldo morphophysicalpedotransferfunctionsforgroundwaterpollutionbynitrateleachingincentralchile
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Morphophysical pedotransfer functions for groundwater pollution by nitrate leaching in Central Chile

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