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handle: 10261/75517
[ES]Se estudia la variación en la composición mineral (cenizas, N, P, K, Ca, Mg, Na, Fe, Mn, Cu y Zn) con el avance de madurez de la planta, en siete cultivares de Trifolium repens (2cv), Trifolium pratense (2cv) y Medicago sativa (3 cv). Las concentraciones de N, P, K, Fe y Zn disminuyen con la madurez, así como también los porcentajes de cenizas. Las de Ca y Mg manifiestan una tendencia, aunque no muy clara, a incrementarse ligeramente. Para Na y Cu no se aprecia una tendencia generalizable, presentando además el Na gran variabilidad en sus concentraciones y márgenes de fluctuación, tanto a nivel de especie como de cultivar. Las evoluciones de Mn varían según la especie y cultivar. Los cultivares de T. repens alcanzan las concentraciones medias superiores para la mayoría de los elementos, sin embargo las extracciones mayores, corresponden, en general, a los de T. pratense.
[EN] This work studies the variation in the mineral composicion (ashes, N, P, K, Ca, Mg, Na, Fe, Mn, Cu and Zn) along the plant maturity advance in seven cultivars of T. repens (2cv). T. pratense (2cv), and Medicago sativa (3cv). N, P, K, Fe and Zn concentrations decrease with maturity and so the ashes percentages do; those of Ca and Mg show a tendency, though not quite clear, to slightly increasing. Na and Cu do not present a generalizable tendency, moreover, the Na shows a great variability in its concentrations and fluctuation margins, to spatial level as much as to cultivar. The Mn evolution varies according to species and cultivar. T. repens cultivars reach superior mean concentrations for most of its elements, however, major elemental uptake generally correspond to those of T. pratense.
17 páginas, 4 figuras, 2 tablas.-- Con la colaboración técnica de: M.I. Díaz-Güemes Pérez, J.C. Estévez Gonzáles, M.A. Sánchez Rodríguez y M. Martín Hernández
Peer reviewed
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