2008 Joint Meeting of The Geological Society of America, Soil Science Society of America, American Society of Agronomy, Crop Science Society of America, Gulf Coast Association of Geological Societies with the Gulf Coast Section of SEPM
Paper No. 141-36
Presentation Time: 8:00 AM-4:45 PM

Soil Metal Immobilisation and Ryegrass Uptake of Lead, COPPER and ZINC as Affected by Application of Organic Materials as Soil Amendments

NWACHUKWU, Olayinka Ibiwumi, Soil Science and Agroclimatology, Michael Okpara University of Agriculture, College of Crop and Soil Sciences, Michael Okpara University of Agriculture, Umudike- Umuahia, PMB 7267, Nigeria, yinkachukwu@yahoo.co.uk and PULFORD, Ian D., Environmental, Agricultural and Analytical Chemistry, University of Glasgow, Joseph Black Building, Lab C5-12, Glasgow, G12 8QQ, United Kingdom

Field soil which was contaminated due to long term deposition of waste from an old Pb/Zn mine in Tyndrum, Scotland was used in a greenhouse pot experiment. The field soil was amended with green waste compost, peat, coir and wood bark applied at the rates of 1%, 10% and 20% of soil and then planted with ryegrass.

Addition of the organic amendments led to increased biomass yield of ryegrass in all soils after 8 weeks of growth, while EDTA extractable Pb, Cu and Zn was significantly reduced in amended soils. Leaf and root metal concentration was also significantly reduced by the application of amendments, especially at applied rates of 10 and 20%.

Coir, green waste compost and wood bark stood out as amendments which were consistent in immobilising the metals in soil as well as reducing plant uptake of Pb, Cu and Zn; while peat rates above 10% enhanced solubility of Cu and Zn.

2008 Joint Meeting of The Geological Society of America, Soil Science Society of America, American Society of Agronomy, Crop Science Society of America, Gulf Coast Association of Geological Societies with the Gulf Coast Section of SEPM
General Information for this Meeting
Session No. 141--Booth# 36
Geochemistry; Geochemistry, Organic (Posters)
George R. Brown Convention Center: Exhibit Hall E
8:00 AM-4:45 PM, Sunday, 5 October 2008

Geological Society of America Abstracts with Programs, Vol. 40, No. 6, p. 135

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