Copper availability in two soils amended with eleven annual applications of copper‐enriched hog manure

Abstract

Relatively high amounts of Cu are found in manure of hogs (Sus scrofa domesticus) maintained on diets containing growth-stimulating levels of Cu. While disposal of Cu-enriched hog manure through repeated long-term application to agricultural land is commonly practiced, concern exists regarding Cu availability in these soils. Field studies were conducted on a Bertie fine sandy loam (Aquic Hapludults) and a Starr-Dyke clay loam (Fluventic DystochreptsTypic Rhodudults), located in the Coastal Plain and Piedmont regions of Virginia. The objective was to examine the effects of long-term Cu application on corn (Zea mays L.) growth and to ascertain the Cu sorption capacity of these soils. Field plots were treated with Cu-enriched hog manure or CUSO 4 (on an equivalent Cu basis) annually. Manure amendments totaled about 240 t ha -1 (dry weight) over an 11 yr period (1978 through 1989). The manure averaged 1300 mg Cu kg -1 (dry weight) over this time period totaling 340 kg Cu ha -1 . Sorption isotherms were determined for sorption of Cu by the Bertie and StarrDyke soils. In comparison with unamended control plots, studies conducted in 1989 showed an early season stunting effect for corn grown on the CUSO 4 treated Bertie soil. No differences in plant heights were observed for corn grown in CuSO 4 treated Starr-Dyke soil or control plots. Plant growth rates were increased on plots amended with Cu-enriched hog manure. Copper sorption capacity of Bertie and Starr-Dyke soils increased following several annual applications of manure.769

“In Situ” Amendments and Revegetation Reduce Trace Element Leaching in a Contaminated Soil

“…This was more evident in soils amended with SL and compost, which are rich in CaCO 3 and basic cations, respectively (Zhu et al 1991). The establishment of a plant cover (CTRP) also changed soil pH and produced a similar change to that found following addition of LEO (Fig.…”

Remediation of Heavy Metal Contaminated Soils: Phytoremediation as a Potentially Promising Clean-Up Technology

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Role of assisted natural remediation in environmental cleanup

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