Publication Date

1989

Description

Reclaimed surface mined land is potentially valuable for use as pasture, but its low fertility limits its use without soil amend­ment (Armiger et al., 1976). The usual acidic nature of these soils may result in mineral deficiencies and toxicities in forage (Vogel, 1981). Fluidized bed combustion residue (FBCR) is the residue from combustion of coal with limestone mixed in a jet air stream in coal-burning power plants (Fennelly, 1984). The procedure is used to trap pollutants such as sulfur dioxide, nitrogen oxides, and volatile elements that would normally be emitted into the atmosphere. The FBCR retains about 50 % of the CaCO3 equivalency of agricultural limestone but it may contain toxic levels of certain elements (Hern et al., 1977). A study was conducted over a 3-yr period to compare the effects of land application of FBCR and limestone to reclaimed surface-mined pastures. Results of the first year were reported previously (Smedley et al., 1985). This paper reports results of the third year of application of FBCR and limestone on forage composition, performance and mineral status of steers grazing the pastures, and utilization by sheep of nutrients in the forage from the pastures.

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Effect of Repeated Applications of Fluidized Bed Combustion Residue to Reclaimed Surface Mined Pastures

Reclaimed surface mined land is potentially valuable for use as pasture, but its low fertility limits its use without soil amend­ment (Armiger et al., 1976). The usual acidic nature of these soils may result in mineral deficiencies and toxicities in forage (Vogel, 1981). Fluidized bed combustion residue (FBCR) is the residue from combustion of coal with limestone mixed in a jet air stream in coal-burning power plants (Fennelly, 1984). The procedure is used to trap pollutants such as sulfur dioxide, nitrogen oxides, and volatile elements that would normally be emitted into the atmosphere. The FBCR retains about 50 % of the CaCO3 equivalency of agricultural limestone but it may contain toxic levels of certain elements (Hern et al., 1977). A study was conducted over a 3-yr period to compare the effects of land application of FBCR and limestone to reclaimed surface-mined pastures. Results of the first year were reported previously (Smedley et al., 1985). This paper reports results of the third year of application of FBCR and limestone on forage composition, performance and mineral status of steers grazing the pastures, and utilization by sheep of nutrients in the forage from the pastures.