
handle: 10261/21903
[ES] En el presente trabajo se estudia el efecto de tres tratamientos en la corrección de la clorosis férrica de melocotonero (variedad "local"). Se estudia también la repercusión de estos tratamientos en la evolución y contenido de nutrientes minerales en hoja, en los equilibrios y relaciones nutritivas y en el rendimiento. Se evidencia la eficacia de la aplicación al suelo de un quelato de hierro y de la inyección sólida de sulfato ferroso. No se corrige la clorosis con el aporte al suelo de compuestos de hierro fritados. La evolución de N, P, K, Ca, Mg, Fe, Mn, Cu y Zn en hoja no se vio afectada por la recuperación de los árboles. Los contenidos de N, K, Ca, Mg y Mn son más elevados en el material no recuperado que en las hojas enverdecidas por los tratamientos, si bien el de nitrógeno tiende a ser similar al final del ciclo. Similares son, igualmente, los contenidos de P, Fe, Cu y Zn. En el material clorótico es mayor el valor de la alimentación global (N+P+K y K+Ca+Mg) y se evidencia un desequilibrio nutritivo a favor del potasio. Además la recuperación de la clorosis provoca un descenso de la relación K/Ca mientras que parece no afectar a la relación P/Fe. Por último, la corrección de la clorosis se traduce en una mejora de la producción.
[EN] In this work is studied the effect of three treatments on the chlorosis correction in peach trees (local variety). The influence of these treatments on the mineral nutrient contents of the leaf and its evolution, nutritive balances and ratios, and the yield, are also studied. The efficacy of both, soil application of chelates and solid injection of ferrous sulfate procedures to chlorosis correction is proved. Soil application of fritters iron compounds is not efficient. The recovering of trees did not influence upon N, P, K, Ca, Mg, Fe, Mn, Cu and Zn in leaves evolution. The N, K, ca, Mg and Mn contents of leaves are higher in clorotic material than in green leaves, neverthless the N content aims to be similar at the end of the vegetative cycle. The P, Fe, Cu and Zn contents are also similar in both types of material. The value of the "global feeding" (N+P+K and K+Ca+Mg) in the chlorotic material is higher than this value in the green material, showing a disturbed nutritive balance by a potassium excess. Moreover the value of the K/Ca ratio is lower when the chlorotic symptomatology disappears. However the P/Fe ratio is not modiffied. A better yield is oberved in recovered tress.
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