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vol.61 número2ESTRATEGIA DE ALIMENTACION DURANTE LA CRIANZA DE CRIAS CAPRINAS CRIOLLASEVALUACIÓN DE LA CALIDAD DE SITIO FORESTAL PARA Eucalyptus camaldulensis MEDIANTE ÍNDICES EDÁFICOS EN ARGIUDOLES Y ARGIACUOLES, ARGENTINA índice de autoresíndice de materiabúsqueda de artículos
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Agricultura Técnica

versión impresa ISSN 0365-2807

Resumen

LONGERI S., Luis; VIDAL P., Iván  y  FERNANDEZ D., Myriam. Ammonium fixation in six Chilean soils from the VIII Region of Chile. Agric. Téc. [online]. 2001, vol.61, n.2, pp.180-191. ISSN 0365-2807.  http://dx.doi.org/10.4067/S0365-28072001000200008.

The purpose of this study was to determine the fixed native NH4+ and the artificial and total fixing capacities in 36 superficial (0-25 cm) soil samples from six soil series of the VIII Region: Diguillín (Andisol), Santa Bárbara (Andisol), Collipulli (Ultisol), San Carlos (Alfisol), Cauquenes (Alfisol) and Quella (Vertisol). The fixed native NH4+ ranged from 0 to 41.2 mg N kg-1, with 1.1 to 2.5 as mean values in the allophanic series (Andisols) and 5.9 to 15.9 in the non-allophanic series. The artificial fixation capacity varied between 0.1 and 72.8 mg N kg-1 with 1.6 to 2.3 as mean values in the allophanic series, and 17.5 to 37.6 in the non-allophanic series, while the total fixing capacity varied from 0.3 to 80.9 mg N kg-1 with 3.4 to 4.1 and 23.4 to 47.0 as mean values in the first and second soil groups, respectively. Ammonium fixation mainly correlated with the exchangeable cations that expand the clay's lattice. Soil containing 2:1 clays or feldspar fixed more NH4+ than other soils.

Palabras clave : non-exchangeable ammonium; nitrogen; clays; alophan.

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