Use of threshold electrolyte concentration analysis to determine salinity and sodicity limit of irrigation water

Use of threshold electrolyte concentration analysis to determine salinity and sodicity limit of irrigation water

ABSTRACT This research studied threshold electrolyte concentration (TEC) of irrigation water and its effect on the infiltration rate of two contrasting soils from Pernambuco state, Brazil. The experiment was conducted in the Soil Chemistry and Salinity Laboratory of Federal Rural University of Pernambuco. Each soil was packed in five Buchner funnels, where one funnel from each soil was submitted to treatment with solution of electrical conductivity (EC) of 0.5, 1.0, 2.0, 4.0 or 8.0 dS m-1. For each funnel containing soil, an increasing ratio of NaCl to CaCl2 was applied in a treatment solution to achieve 10 increasing values of sodium adsorption ratio (SAR) from 0 to 100. These solutions were applied through a Mariotte bottle, with a constant hydraulic head of ~2 cm (pressure potential). After a liter of solution had drained, in the flux was collected for a known time interval, until steady state was reached. Darcy’s equation was used to calculate saturated hydraulic conductivity (Ksat) and a mathematical model used to calculate the TEC as a 20% reduction in Ksat. By increasing SAR similar behavior was noted between the two soils, whereby Ksat decreased, although the relativedecrease in Ksat was greater for SAR of 100 in the soil with higher clay content.

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Main Authors: Menezes,Heitor R. de, Almeida,Brivaldo G. de, Almeida,Ceres D. G. C. de, Bennett,John M., Silva,Emanuelle M. da, Freire,Maria B. G. dos S.
Format: Digital revista
Language:English
Published: Departamento de Engenharia Agrícola - UFCG 2014
Online Access:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662014001300053
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spelling oai:scielo:S1415-436620140013000532017-03-22Use of threshold electrolyte concentration analysis to determine salinity and sodicity limit of irrigation waterMenezes,Heitor R. deAlmeida,Brivaldo G. deAlmeida,Ceres D. G. C. deBennett,John M.Silva,Emanuelle M. daFreire,Maria B. G. dos S. electrical conductivity saturated hydraulic conductivity SAR ABSTRACT This research studied threshold electrolyte concentration (TEC) of irrigation water and its effect on the infiltration rate of two contrasting soils from Pernambuco state, Brazil. The experiment was conducted in the Soil Chemistry and Salinity Laboratory of Federal Rural University of Pernambuco. Each soil was packed in five Buchner funnels, where one funnel from each soil was submitted to treatment with solution of electrical conductivity (EC) of 0.5, 1.0, 2.0, 4.0 or 8.0 dS m-1. For each funnel containing soil, an increasing ratio of NaCl to CaCl2 was applied in a treatment solution to achieve 10 increasing values of sodium adsorption ratio (SAR) from 0 to 100. These solutions were applied through a Mariotte bottle, with a constant hydraulic head of ~2 cm (pressure potential). After a liter of solution had drained, in the flux was collected for a known time interval, until steady state was reached. Darcy’s equation was used to calculate saturated hydraulic conductivity (Ksat) and a mathematical model used to calculate the TEC as a 20% reduction in Ksat. By increasing SAR similar behavior was noted between the two soils, whereby Ksat decreased, although the relativedecrease in Ksat was greater for SAR of 100 in the soil with higher clay content.info:eu-repo/semantics/openAccessDepartamento de Engenharia Agrícola - UFCGRevista Brasileira de Engenharia Agrícola e Ambiental v.18 suppl.0 20142014-01-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662014001300053en10.1590/1807-1929/agriambi.v18nsupps53-s58
institution SCIELO
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country Brasil
countrycode BR
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access En linea
databasecode rev-scielo-br
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region America del Sur
libraryname SciELO
language English
format Digital
author Menezes,Heitor R. de
Almeida,Brivaldo G. de
Almeida,Ceres D. G. C. de
Bennett,John M.
Silva,Emanuelle M. da
Freire,Maria B. G. dos S.
spellingShingle Menezes,Heitor R. de
Almeida,Brivaldo G. de
Almeida,Ceres D. G. C. de
Bennett,John M.
Silva,Emanuelle M. da
Freire,Maria B. G. dos S.
Use of threshold electrolyte concentration analysis to determine salinity and sodicity limit of irrigation water
author_facet Menezes,Heitor R. de
Almeida,Brivaldo G. de
Almeida,Ceres D. G. C. de
Bennett,John M.
Silva,Emanuelle M. da
Freire,Maria B. G. dos S.
author_sort Menezes,Heitor R. de
title Use of threshold electrolyte concentration analysis to determine salinity and sodicity limit of irrigation water
title_short Use of threshold electrolyte concentration analysis to determine salinity and sodicity limit of irrigation water
title_full Use of threshold electrolyte concentration analysis to determine salinity and sodicity limit of irrigation water
title_fullStr Use of threshold electrolyte concentration analysis to determine salinity and sodicity limit of irrigation water
title_full_unstemmed Use of threshold electrolyte concentration analysis to determine salinity and sodicity limit of irrigation water
title_sort use of threshold electrolyte concentration analysis to determine salinity and sodicity limit of irrigation water
description ABSTRACT This research studied threshold electrolyte concentration (TEC) of irrigation water and its effect on the infiltration rate of two contrasting soils from Pernambuco state, Brazil. The experiment was conducted in the Soil Chemistry and Salinity Laboratory of Federal Rural University of Pernambuco. Each soil was packed in five Buchner funnels, where one funnel from each soil was submitted to treatment with solution of electrical conductivity (EC) of 0.5, 1.0, 2.0, 4.0 or 8.0 dS m-1. For each funnel containing soil, an increasing ratio of NaCl to CaCl2 was applied in a treatment solution to achieve 10 increasing values of sodium adsorption ratio (SAR) from 0 to 100. These solutions were applied through a Mariotte bottle, with a constant hydraulic head of ~2 cm (pressure potential). After a liter of solution had drained, in the flux was collected for a known time interval, until steady state was reached. Darcy’s equation was used to calculate saturated hydraulic conductivity (Ksat) and a mathematical model used to calculate the TEC as a 20% reduction in Ksat. By increasing SAR similar behavior was noted between the two soils, whereby Ksat decreased, although the relativedecrease in Ksat was greater for SAR of 100 in the soil with higher clay content.
publisher Departamento de Engenharia Agrícola - UFCG
publishDate 2014
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662014001300053
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