Determination of Plant-Available Nutrients in Two Wood Ashes: The Influence of Combustion Conditions |
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Authors: | Ivana Perná Pavla Ochecová Ji?ina Száková Tomá? Hanzlí?ek Pavel Tlusto? |
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Institution: | 1. Department of Materials Structure and Properties, Institute of Rock Structure and Mechanics of the Academy of Sciences of the Czech Republic, Prague, Czech Republic;2. Department of Agro-Environmental Chemistry and Plant Nutrition, Czech University of Life Sciences Prague, Prague, Czech Republic |
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Abstract: | Wood ashes were traditionally used as a fertilizing agent from the very beginning of working land but the fertilizing quality varies according to the combusted biomass and also the industrial burning equipment. The differences between wood ash originated from fluid and classic boiler were investigated by X-ray powder diffraction (XRD), X-ray fluorescence spectrometry (XRF), differential thermal analysis (DTA), thermo-gravimetric analysis (TGA), scanning electron microscopy (SEM), and Mehlich 3 and deionized water extraction procedures in relation to extraction time. The results, especially of the SEM and chemical extractions, have demonstrated that the type of burning boiler determines the portions of the leachable nutrient elements. The silica and alumina ash content conducted by the elevated temperature transforms the main proportion of calcium and potassium into the insoluble feldspars. Due to this effect only a small amount of nutrients could be released and served as a fertilizing matter. |
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Keywords: | Combustion condition crystal phases fertilizer plant-available nutrients wood ash |
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