Effect of direct seeding on phosphorus adsorption processes in the Mollisols of the center-north of the province of Córdoba (Argentina)
Under the hypothesis that the stratification of soil properties under directseeding conditions (SD) modifies P sorption parameters, the objectives of this work were: i) to estimate P sorption parameters by using Langmuir isotherms in samples of different depth, extracted from fields under continuous...
| Main Authors: | , , , |
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| Format: | Online |
| Language: | spa |
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Facultad de Ciencias Agropecuarias
2017
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| Subjects: | |
| Online Access: | https://revistas.unc.edu.ar/index.php/agris/article/view/19036 |
| _version_ | 1834605956066967552 |
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| author | Rollan, A. A. Bachmeier, O. A. Silva Rosi, M. M. Moreno, M. A. |
| author_facet | Rollan, A. A. Bachmeier, O. A. Silva Rosi, M. M. Moreno, M. A. |
| author_sort | Rollan, A. A. |
| collection | Portal de Revistas |
| description | Under the hypothesis that the stratification of soil properties under directseeding conditions (SD) modifies P sorption parameters, the objectives of this work were: i) to estimate P sorption parameters by using Langmuir isotherms in samples of different depth, extracted from fields under continuous direct seeding; (ii) to analyze the similarities and differences between the parameters obtained; and (iii) to identify the relationship between the edaphic properties of the surface stratum and the estimated parameters. Soil samples of 0 to 5 and 0 to 20 cm were equilibrated with solutions with increasing concentrations of P. From the relationship between the adsorbed P and the concentration of P in equilibrium, the maximum adsorption capacity (Qmax) and the retention affinity constant (k) were estimated. The higher Qmax and the low k of 0 to 5 cm samples show that there is a distinct behaviour in the first centimeters of depth. In that layer the bioavailability of P and the residuality of the applied fertilizers are regulated by adsorption phenomena responding to the presence of organic colloids, which are accumulated by the stratification associated with SD. |
| format | Online |
| id | oai:ojs.revistas.unc.edu.ar:article-19036 |
| institution | Universidad Nacional de Cordoba |
| language | spa |
| publishDate | 2017 |
| publisher | Facultad de Ciencias Agropecuarias |
| record_format | ojs |
| spelling | oai:ojs.revistas.unc.edu.ar:article-190362020-03-31T16:03:42Z Effect of direct seeding on phosphorus adsorption processes in the Mollisols of the center-north of the province of Córdoba (Argentina) Efecto de la siembra directa sobre los procesos de adsorción de fósforo en los molisoles del centro norte de la provincia de Córdoba (Argentina) Rollan, A. A. Bachmeier, O. A. Silva Rosi, M. M. Moreno, M. A. Langmuir estratificación materia orgánica del suelo Haplustoles. Langmuir soil stratification soil organic matter Haplustolls. Under the hypothesis that the stratification of soil properties under directseeding conditions (SD) modifies P sorption parameters, the objectives of this work were: i) to estimate P sorption parameters by using Langmuir isotherms in samples of different depth, extracted from fields under continuous direct seeding; (ii) to analyze the similarities and differences between the parameters obtained; and (iii) to identify the relationship between the edaphic properties of the surface stratum and the estimated parameters. Soil samples of 0 to 5 and 0 to 20 cm were equilibrated with solutions with increasing concentrations of P. From the relationship between the adsorbed P and the concentration of P in equilibrium, the maximum adsorption capacity (Qmax) and the retention affinity constant (k) were estimated. The higher Qmax and the low k of 0 to 5 cm samples show that there is a distinct behaviour in the first centimeters of depth. In that layer the bioavailability of P and the residuality of the applied fertilizers are regulated by adsorption phenomena responding to the presence of organic colloids, which are accumulated by the stratification associated with SD. Bajo la hipótesis que señala que en condiciones de siembra directa (SD) laestratificación de las propiedades edáficas modifica los parámetros de sorción de fósforo (P), se plantearon como objetivos de este trabajo: i) estimar los parámetros de sorción P mediante uso de isotermas de Langmuir en muestras de distinta profundidad provenientes de lotes de cultivo bajo SD continua; ii) analizar las similitudes y diferencias entre los parámetros obtenidos; y iii) identificar la relación entre las propiedades edáficas del estrato superficial y los parámetros estimados. Se equilibraron muestras de suelo de 0 a 5 y 0 a 20 cm con soluciones de concentración creciente en P. A partir de la relación entre el P adsorbido y la concentración de P en equilibrio se estimó la capacidad máxima de adsorción (Qmax) y la constante de afinidad de retención (k). El mayor Qmax y la baja k de las muestras de 0 a 5 cm demuestran que existe un comportamiento diferencial de los primeros centímetros de profundidad. En ese espesor la biodisponibilidad de P y la residualidad de los fertilizantes aplicados están reguladas por fenómenos de adsorción por parte de los coloides orgánicos, acumulados por el proceso de su estratificación asociado a la SD. Facultad de Ciencias Agropecuarias 2017-12-27 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf text/html https://revistas.unc.edu.ar/index.php/agris/article/view/19036 10.31047/1668.298x.v34.n2.19036 AgriScientia; Vol. 34 No. 2 (2017); 1-11 AgriScientia; Vol. 34 Núm. 2 (2017); 1-11 1668-298X 10.31047/1668.298x.v34.n2 spa https://revistas.unc.edu.ar/index.php/agris/article/view/19036/18951 https://revistas.unc.edu.ar/index.php/agris/article/view/19036/29315 |
| spellingShingle | Langmuir estratificación materia orgánica del suelo Haplustoles. Langmuir soil stratification soil organic matter Haplustolls. Rollan, A. A. Bachmeier, O. A. Silva Rosi, M. M. Moreno, M. A. Effect of direct seeding on phosphorus adsorption processes in the Mollisols of the center-north of the province of Córdoba (Argentina) |
| title | Effect of direct seeding on phosphorus adsorption processes in the Mollisols of the center-north of the province of Córdoba (Argentina) |
| title_alt | Efecto de la siembra directa sobre los procesos de adsorción de fósforo en los molisoles del centro norte de la provincia de Córdoba (Argentina) |
| title_full | Effect of direct seeding on phosphorus adsorption processes in the Mollisols of the center-north of the province of Córdoba (Argentina) |
| title_fullStr | Effect of direct seeding on phosphorus adsorption processes in the Mollisols of the center-north of the province of Córdoba (Argentina) |
| title_full_unstemmed | Effect of direct seeding on phosphorus adsorption processes in the Mollisols of the center-north of the province of Córdoba (Argentina) |
| title_short | Effect of direct seeding on phosphorus adsorption processes in the Mollisols of the center-north of the province of Córdoba (Argentina) |
| title_sort | effect of direct seeding on phosphorus adsorption processes in the mollisols of the center north of the province of cordoba argentina |
| topic | Langmuir estratificación materia orgánica del suelo Haplustoles. Langmuir soil stratification soil organic matter Haplustolls. |
| topic_facet | Langmuir estratificación materia orgánica del suelo Haplustoles. Langmuir soil stratification soil organic matter Haplustolls. |
| url | https://revistas.unc.edu.ar/index.php/agris/article/view/19036 |
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