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vol.60 número3CARACTERIZACIÓN DEL CRECIMIENTO Y LA PRODUCCIÓN DE CEREALES FORRAJEROS INVERNALES EN CÓRDOBA, ARGENTINACAMBIOS EN LA PRODUCCION Y COMPOSICION LACTEA POR EFECTO DEL INCREMENTO DE CÉLULAS SOMÁTICAS EN LECHE DE VACAS. índice de autoresíndice de materiabúsqueda de artículos
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Agricultura Técnica

versión impresa ISSN 0365-2807

Resumen

SOTO O., Patricio; JAHN B., Ernesto; MALDONADO I., Isaac  y  RODRIGUEZ S., Nicasio. Alfalfa (Medicago sativa L.) improvement with fertilization in different soil conditions. Agric. Téc. [online]. 2000, vol.60, n.3, pp.236-250. ISSN 0365-2807.  http://dx.doi.org/10.4067/S0365-28072000000300004.

Alfalfa pasture productivity is affected by the water table depth (WTD) in which it is established. In an alfalfa field three sites were selected that represented different WTD conditions: deep (NFP), intermediate (NFI) and superficial (NFS). A complete randomized block design experiment was established to study the response to different fertilizer applications (N, P, K, S, Ca, Mg) during two seasons. The objective was to determine the effect of the different fertilization treatments on dry matter production under different WTD. Parameters evaluated were: variations in WTD, soil moisture, DM production, and soil contents of N, P and K. With deep (D) condition WTD was 30 and 40 cm deeper than for Intermediate (I) and Superficial (S), respectively, during the winter period. Dry matter production of alfalfa increased (P<0.05) with complete fertilization; the average effect for the two seasons was 31; 183 and 177% for D, I and S soil conditions, respectively. The addition of N to the complete fertilization had a significant (P<0.05) effect on dry matter production only on the first season. For D application of N with the complete fertilization had no effect on production. Application of P increased content of P. Content of K in the soil decreased only for D.

Palabras clave : alfalfa yield; drainage; N; P; K.

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