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handle: 10261/22209
[EN] We study the nutritive status of alfalfa harvested on three types of soil: brown soil with calcareous crust (Terrace soil); unvedeloped soil on marl sedimentation (Serosem); and alluvial soil (Ribera soil). For our purpose we use the plant feeding ratio (as summation of the percentages of the N, P, K, Ca and Mg on dry matter basis) and the percentage of these elements in the whole feeding of the plant (the nutritive balance N:P:K: and K:Ca:Mg). The N + P + K feeding ratio was: 4,14 for the alfalfa growing on Terrace soil; 4,81 for the alfalfa on Serosem; and 5,47 for the alfalfa from Ribera soil. The K + Ca + Mg feeding ratio was: 2,83 for the alfalfa on Terrace soil; 3,03 for the alfalfa on Ribera Soil; and, 3,14 for the alfalfa growing on Serosem. The N:P:K nutritive balance was: 71:6:23 for Terrace soil; 63:5:32 for Serosem; and 57:5:38 for Ribera soil. The K:Ca:Mg nutritive balance was: 33:57::10 for the alfalfa on Terrace soil; 50:40:10 for the alfalfa on Serosem; and 68:25:7 for the alfalfa on Ribera soil.
[ES] Se estudia el estado nutritivo de la alfalfa (Medicago sativa L.) cultivada en tres tipos de suelo: suelo pardo de costra caliza (terraza); suelo poco desarrollado sobre sedimentos de marga (serosem) y suelo aluvial (vega). Para ello se considera el nivel de alimentación de la planta (suma de los porcentajes sobre materia seca de cada elemento considerado N, P, K, Ca y Mg) y la participación porcentual de cada uno de estos elementos en la alimentación global de la planta (equilibrios nutritivos: N :P :K y K : Ca : Mg). Los valores de alimentación global (N + P + K) encontrados han sido: 4,14 para la alfalfa obtenida en suelo de terraza; 4,81 para la de serosem, y 5,47 para la de vega. La alimentación global (K + Ca + Mg) fue: 2,83 para terraza; 3,03 para vega y 3,14 para serosem. El equilibrio N : P : K fue: en terraza, 71 : 6 : 23, en serosem, 63 : 5 : 32 y en vega, 57 : 5 : 38. El equilibrio K : Ca : Mg fue, respectivamente: 33 : 57 : 10; 50 : 40 : 10, y 68 : 25 : 7.
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