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Nitrogen-salt interaction in ryegrass : implications for soil potassium testing

Authors: Murillo Carpio, José Manuel; Díaz Blanco, Manuel Jesús; Cabrera Capitán, Francisco; López Núñez, Rafael;

Nitrogen-salt interaction in ryegrass : implications for soil potassium testing

Abstract

[ES]: La adición fraccionada de N-NO3 (irrigación con una solución de 50 mg N I-1) bajo condiciones salinas (irrigación con una solución de 10 mM de NaCl, que no limitó el crecimiento de la planta) y no salinas, potenció la absorción de Na del ryegrass italiano (Lolium multiflorum Lam. cv. “Barwoltra”) en dos suelos potencialmente ricos en K. También aumentó la absorción de Mg. No se observó esta circunstancia en el caso de adiciones fraccionadas de P. Tras un “consumo de lujo” inicial de K por parte del ryegrass, la disponibilidad de K en el suelo pudo ser insuficiente para completar el vigoroso crecimiento impuesto por la adición de N, siendo el K parcialmente reemplazado por Na (y Mg, en los tratamientos con N) con el fin de que la planta pudiera completar su crecimiento.

[EN]: Split additions of NO3-N (irrigation with a solution of 50 mg Nl-1) under saline conditions (irrigation with a 10 mM NaCl solution, which did not negatively affect plant growth) and non-saline conditions (water), enhanced the Na uptake by Italian ryegrass (Lolium multiflorum Lam. cv. “Barwoltra”) grown in two soils potentially rich in K. The Mg uptake was also enhanced. This was not observed for split additions of P. After an initial “luxury” K plant uptake, the K supply could be insufficient to cope with the vigorous growth of the ryegrass resulting from the addition of NO3-N, so that K was partially replaced by Na (and Mg) for achieving plant growth in treatments adding N.

10 páginas, 2 figuras, 3 tablas, 16 referencias.

Peer reviewed

Country
Spain
Related Organizations
Keywords

Ryegrass italiano, Salinity, Soil K, K en suelo, Salinidad, Nutrients, Italian ryegrass, Nutrientes

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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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