Resumen

QUIRANTES, M; CALVO, F; ROMERO, E  y  NOGALES, R. Soil-nutrient availability affected by different biomass-ash applications. J. Soil Sci. Plant Nutr. [online]. 2016, vol.16, n.1, pp.159-163.  Epub 18-Ene-2016. ISSN 0718-9516.  http://dx.doi.org/10.4067/S0718-95162016005000012.

This study, through an incubation experiment, evaluates the effect that different biomass ashes exert on the extractability of nutrients and some chemical parameters and dehydrogenase activity of a slightly acid soil. Three types of as were selected: two new ashes generated by the dry combustion of olive cake or by gasification of greenhouse vegetable wastes, and a third produced by wood combustion. The ash significantly increased the pH, electrical conductivity, and dehydrogenase activity of the soil. Dry olive-cake ash was the most effective in raising the levels of soil AB-DTPA extractable P, K, and Cu. By contrast, wood ash caused the greatest increases in soil AB-DTPA-extractable Zn. The three as he showed little effectiveness for increasing soil ABDTPA extractable Fe and Mn. Ash from dry olive cake could be used as a low-cost potassium fertilizer.

Palabras clave : Wood ash; dry olive cake ash; greenhouse vegetable wastes ash; soil incubation; dehydrogenase activity; AB-DTPA extractable nutrients.

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