Resumo

PIRANEQUE G., Nelson V.; AGUIRRE F., Sonia E.  e  MENJIVAR F., Juan C.. Evolution of nutrients element content in soils dedicated to onion crop. Acta Agron. [online]. 2007, vol.56, n.1, pp.37-42. ISSN 0120-2812.

To determine the evolution of nutrient content in soils dedicated to commercial onion crop (Allium. cepa) in the municipality of Tibasosa, Boyacá,Colombia, in a Sulfic endoaquepts soil, three treatments established: Without fertilization (T1), conventional fertilization used in the area (T2) and fertilization according to analysis of soils (T3). Samples were collected for analysis 20 days before plantation and 45, 90 and 120 days after sowing. The of contents macroelements showed the following order N>Ca>K>Mg>S>P and those of micronutrients, Mn>Fe>Zn>Cu>B. There were positive interactions among N/Fe, P/K, P/Ca, P/Mg, K/Mg, K/S, Mg/S, B/Zn and Cu/Mn and negative interactions among N/K, N/S, P/Fe, K/Fe, Mg/Fe, B/Fe, S/Fe, Cu/Zn and Zn/Mn affecting their concentration and availability. The results evidence that a balanced content of nutrients can increase the yield.

Palavras-chave : Allium cepa; Sulfic endoaquepts; Fertility.

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