Puesta a punto de la metodología de ejercicios de intercomparación para análisis de fertilidad de suelos. Primeros resultados
Uson Murillo, A. (Universidad de Zaragoza) ; Betran Aso, J. (Universidad de Zaragoza)
Resumen: Este trabajo recoge la metodología de realización de un ejercicio de intercomparación entre laboratorios españoles que ofertan análisis de la fertilidad de los suelos. Se prepararon alícuotas de cada una de las dos muestras de gran volumen, tomadas en dos suelos con marcadas diferencias entre sí. Una vez testada la homogeneidad de alícuotas se envió una de cada suelo a cada uno de los veintiún laboratorios participantes, junto con instrucciones y un formato para remisión de resultados. En todo el proceso se veló especialmente por la confidencialidad de los resultados de cada participante. Recibidas las respuestas se procedió al análisis de resultados, asignación de valores de consenso y evaluación de cada resultado mediante el indicador “z-score”. El ejercicio ha sido muy bien recibido en un colectivo de laboratorios que no mantenía apenas contacto, y se ha mostrado muy eficaz en la caracterización de la calidad de los resultados emitidos. Se ha puesto en evidencia que hay parámetros con resultados muy homogéneos (pH) frente a otros con diferencias incompatibles con el uso agronómico fiable de los análisis (granulometría, fósforo asimilable, etc.). Queda de manifiesto la urgente necesidad de mantener periódicamente este tipo de ejercicio, como un control de calidad externo que aumente la fiabilidad de los laboratorios.
This work includes the methodology for carrying out a proficiency testing program between Spanish laboratories that offer soil fertility analysis. Aliquots of each of the two large volume samples were prepared, taken from two surface horizons of soils with marked differences between them. Once the homogeneity of aliquots was tested, one sample of each soil was sent to each of the twenty-one participating laboratories, together with the instructions and a format for the submission of results. Throughout the process, special care was taken to ensure the confidentiality of the results of each individual participant. Once the responses were received, the results were analyzed, consensus values were assigned and each result was evaluated using the "z-score" indicator. The exercise was very well received by the participating laboratories, and has been very effective in characterizing the quality of the results issued. It has been shown that there are parameters with very homogeneous results (pH) compared to others with differences incompatible with the reliable agronomic use of analyses (granulometry, assimilable phosphorus, etc.). The urgent need to maintain this type of intercomparison exercise periodically, as an external quality control that increases the reliability of laboratories, is evident.
Idioma: Español
DOI: 10.3232/SJSS.2020.V10.N3.01
Año: 2020
Publicado en: Spanish journal of soil science 10, 3 (2020), 191-197
ISSN: 2253-6574
Factor impacto SCIMAGO: 0.316 - Soil Science (Q3)
Tipo y forma: Article (Published version)
Área (Departamento): Área Producción Vegetal (Dpto. CC.Agrar.y Medio Natural)
Área (Departamento): Área Edafología y Quím.Agríco. (Dpto. CC.Agrar.y Medio Natural)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes.
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This work includes the methodology for carrying out a proficiency testing program between Spanish laboratories that offer soil fertility analysis. Aliquots of each of the two large volume samples were prepared, taken from two surface horizons of soils with marked differences between them. Once the homogeneity of aliquots was tested, one sample of each soil was sent to each of the twenty-one participating laboratories, together with the instructions and a format for the submission of results. Throughout the process, special care was taken to ensure the confidentiality of the results of each individual participant. Once the responses were received, the results were analyzed, consensus values were assigned and each result was evaluated using the "z-score" indicator. The exercise was very well received by the participating laboratories, and has been very effective in characterizing the quality of the results issued. It has been shown that there are parameters with very homogeneous results (pH) compared to others with differences incompatible with the reliable agronomic use of analyses (granulometry, assimilable phosphorus, etc.). The urgent need to maintain this type of intercomparison exercise periodically, as an external quality control that increases the reliability of laboratories, is evident.
Idioma: Español
DOI: 10.3232/SJSS.2020.V10.N3.01
Año: 2020
Publicado en: Spanish journal of soil science 10, 3 (2020), 191-197
ISSN: 2253-6574
Factor impacto SCIMAGO: 0.316 - Soil Science (Q3)
Tipo y forma: Article (Published version)
Área (Departamento): Área Producción Vegetal (Dpto. CC.Agrar.y Medio Natural)
Área (Departamento): Área Edafología y Quím.Agríco. (Dpto. CC.Agrar.y Medio Natural)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes. Exportado de SIDERAL (2022-01-20-22:57:51)
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Record created 2021-01-19, last modified 2022-01-20