Effect of conventional and no-till practices on solute transport in long term field trials
The prediction and description of water and solute movement in soils under different tillage systems is essential to the study of pesticide contamination in soils and groundwater quality. However, the impact of tillage practices in soil physical characteristics varies across locations and types of s...
| Main Authors: | , , , , , |
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| Format: | Artículo |
| Language: | Inglés |
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Elsevier
2019
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| Online Access: | https://www.sciencedirect.com/science/article/pii/S0167198714000609 http://hdl.handle.net/20.500.12123/5189 https://doi.org/10.1016/j.still.2014.04.002 |
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| author | Okada, Elena Costa, Jose Luis Bedmar, Francisco Barbagelata, Pedro Anibal Irizar, Alicia Beatriz Rampoldi, Edgar Ariel |
| author_browse | Barbagelata, Pedro Anibal Bedmar, Francisco Costa, Jose Luis Irizar, Alicia Beatriz Okada, Elena Rampoldi, Edgar Ariel |
| author_facet | Okada, Elena Costa, Jose Luis Bedmar, Francisco Barbagelata, Pedro Anibal Irizar, Alicia Beatriz Rampoldi, Edgar Ariel |
| author_sort | Okada, Elena |
| collection | INTA Digital |
| description | The prediction and description of water and solute movement in soils under different tillage systems is essential to the study of pesticide contamination in soils and groundwater quality. However, the impact of tillage practices in soil physical characteristics varies across locations and types of soil. In this work we analyzed the long-term impact of no till (NT) and conventional tillage (CT) on solute transport within three different Argentinian soils. Bromide transport studies were conducted under controlled conditions in the laboratory using undisturbed soil columns. Samples were taken from long term field trials, with a history of over 16 years of NT and CT practices. The studied soils were: Paraná soil (PAR), a silty clay loam soil (<37% clay), and Mandfredi (MAN) and Pergamino (PER), both silty loam soils (<26% clay). Breakthrough curves were fitted using the non-equilibrium equation model (CDEneq). The following transport parameters were estimated from the fitted curves: velocity (v), hydrodynamic dispersion coefficient (D), dispersivity (λ), mobile water content (β), and mass transfer coefficient (ω). The relationship between the estimated parameters and soil properties was analyzed. Also, the parameters were compared between soils and tillage practices using a mixed linear model. Parameters v and D were positively correlated to soil clay content in NT samples. Such correlation was not observed in CT samples. This would suggest that clay content in soils under conservational tillage, favors the transport of solutes, as it increases v and D. In this study, no differences were found between soils or tillage practice regarding the estimated v parameter. Differences were found for D and λ between CT and NT samples in PAR soil. In this case, the magnitude of solute dispersion was higher in the NT samples. For the other soils (MAN and PER), no difference in D and λ between tillage practices was found. Effects of tillage on solute transport was not substantial in these soils, even when no till management had been applied for over 30 years. Whereas in PAR (the soil with higher clay content), soil management had an important effect on structure, and therefore on solute and water transport. These results suggest that in the PAR clayey soils studied, structure is well preserved under conservational tillage, and this could lead to an increase in the risk of leaching of solutes or chemical substances. |
| format | Artículo |
| id | INTA5189 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2019 |
| publishDateRange | 2019 |
| publishDateSort | 2019 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | INTA51892019-05-22T14:32:08Z Effect of conventional and no-till practices on solute transport in long term field trials Okada, Elena Costa, Jose Luis Bedmar, Francisco Barbagelata, Pedro Anibal Irizar, Alicia Beatriz Rampoldi, Edgar Ariel Labranza Labranza Convencional Procesos de Transporte en el Suelo Soluto Cero-labranza Estructura del Suelo Tillage Conventional Tillage Soil Transport Processes Solutes Zero Tillage Soil Structure The prediction and description of water and solute movement in soils under different tillage systems is essential to the study of pesticide contamination in soils and groundwater quality. However, the impact of tillage practices in soil physical characteristics varies across locations and types of soil. In this work we analyzed the long-term impact of no till (NT) and conventional tillage (CT) on solute transport within three different Argentinian soils. Bromide transport studies were conducted under controlled conditions in the laboratory using undisturbed soil columns. Samples were taken from long term field trials, with a history of over 16 years of NT and CT practices. The studied soils were: Paraná soil (PAR), a silty clay loam soil (<37% clay), and Mandfredi (MAN) and Pergamino (PER), both silty loam soils (<26% clay). Breakthrough curves were fitted using the non-equilibrium equation model (CDEneq). The following transport parameters were estimated from the fitted curves: velocity (v), hydrodynamic dispersion coefficient (D), dispersivity (λ), mobile water content (β), and mass transfer coefficient (ω). The relationship between the estimated parameters and soil properties was analyzed. Also, the parameters were compared between soils and tillage practices using a mixed linear model. Parameters v and D were positively correlated to soil clay content in NT samples. Such correlation was not observed in CT samples. This would suggest that clay content in soils under conservational tillage, favors the transport of solutes, as it increases v and D. In this study, no differences were found between soils or tillage practice regarding the estimated v parameter. Differences were found for D and λ between CT and NT samples in PAR soil. In this case, the magnitude of solute dispersion was higher in the NT samples. For the other soils (MAN and PER), no difference in D and λ between tillage practices was found. Effects of tillage on solute transport was not substantial in these soils, even when no till management had been applied for over 30 years. Whereas in PAR (the soil with higher clay content), soil management had an important effect on structure, and therefore on solute and water transport. These results suggest that in the PAR clayey soils studied, structure is well preserved under conservational tillage, and this could lead to an increase in the risk of leaching of solutes or chemical substances. EEA Balcarce Fil: Okada, Elena. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina Fil: Costa, Jose Luis. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina Fil: Bedmar, Francisco. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina Fil: Barbagelata, Pedro Anibal. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Paraná; Argentina. Universidad Nacional de Entre Ríos. Facultad Ciencias Agropecuarias; Argentina Fil: Irizar, Alicia Beatriz. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Pergamino; Argentina Fil: Rampoldi, Edgar Ariel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi; Argentina. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias; Argentina 2019-05-22T14:29:22Z 2019-05-22T14:29:22Z 2014-09 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://www.sciencedirect.com/science/article/pii/S0167198714000609 http://hdl.handle.net/20.500.12123/5189 0167-1987 https://doi.org/10.1016/j.still.2014.04.002 eng info:eu-repo/semantics/restrictedAccess application/pdf Elsevier Soil and Tillage Research 142 : 8-14 (September 2014) |
| spellingShingle | Labranza Labranza Convencional Procesos de Transporte en el Suelo Soluto Cero-labranza Estructura del Suelo Tillage Conventional Tillage Soil Transport Processes Solutes Zero Tillage Soil Structure Okada, Elena Costa, Jose Luis Bedmar, Francisco Barbagelata, Pedro Anibal Irizar, Alicia Beatriz Rampoldi, Edgar Ariel Effect of conventional and no-till practices on solute transport in long term field trials |
| title | Effect of conventional and no-till practices on solute transport in long term field trials |
| title_full | Effect of conventional and no-till practices on solute transport in long term field trials |
| title_fullStr | Effect of conventional and no-till practices on solute transport in long term field trials |
| title_full_unstemmed | Effect of conventional and no-till practices on solute transport in long term field trials |
| title_short | Effect of conventional and no-till practices on solute transport in long term field trials |
| title_sort | effect of conventional and no till practices on solute transport in long term field trials |
| topic | Labranza Labranza Convencional Procesos de Transporte en el Suelo Soluto Cero-labranza Estructura del Suelo Tillage Conventional Tillage Soil Transport Processes Solutes Zero Tillage Soil Structure |
| url | https://www.sciencedirect.com/science/article/pii/S0167198714000609 http://hdl.handle.net/20.500.12123/5189 https://doi.org/10.1016/j.still.2014.04.002 |
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