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Effect of coal combustion wastes used as lime substitutes in nutrition of apples in three soils

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Summary

Fluidized bed combustion represents a feasible technology for energy production utilizing high S fossil fuels. The process generates not only bed waste (FBM) (coal ash plus CaSO4 and unreacted CaO) but also flyash (FA). The later waste has not been evaluated for its effects on plants and soils. A greenhouse experiment, using apple seedlings, was carried out using FBM, FA and calcitic limestone applied at or up to twice the lime requirement on three soil materials. Seedling growth varied dependent upon the treatment-soil combination. Growth was reduced by 60% on the Manor soil from FA applied at twice the lime requirement and was attributed to the higher initial reactiveness of the FA compared to FBM or limestone. Leaf P, K, N, Cu and Al were not significantly affected by treatments over all soils while Ca, and N decreased and Mg varied depedent upon treatment. Soil pH was increased by all treatments. DTPA (diethylenetriaminepentaacetic acid) extractable Mn and Zn were good estimators of leaf Mn and Zn while DTPA Cu and Fe were not.

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Authors and Affiliations

  1. Fruit Laboratory, Agricultural Research Service, USDA, BARC-W, Beltsville, MD, USA

    R. F. Korcak

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  1. R. F. Korcak
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Korcak, R.F. Effect of coal combustion wastes used as lime substitutes in nutrition of apples in three soils. Plant Soil 85, 437–441 (1985). https://doi.org/10.1007/BF02220199

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  • DOI: https://doi.org/10.1007/BF02220199

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