Trace Metals Availability in a Biosolids-Amended Soil.
(S11-sukkariyah648561-poster)
Authors:
B. Sukkariyah* - VA. Tech.
G. Evanylo - VA Tech L. Zelazny - VA Tech
Abstract:
Biosolids applications to agricultural land introduce potentially toxic trace metals to soil. Concerns over the long-term availability of these metals to plants are raised. The objectives of this study were to assess the availability to and uptake of Cu, Ni, Cd, and Zn by plants. Biosolids were applied to 1.5 x 2.3 m confined plots of a Davidson clay loam (Clayey, Kaolinitic, Thermic, Rhodic Paleudult) in 1984 at 0, 42, 84, 126, 168, and 210 Mg/ha. The highest biosolids application supplied 4.5, 750, 43, and 600 kg/ha of Cd, Cu, Ni, and Zn, respectively. Plant analysis revealed no significant effect on the yield of radish (Raphanus sativus L.) and lettuce (Lactuca sativa Var longifolia). Plant tissue metal
concentrations increased with biosolids rates but were within the normal range of these crops. Metal concentration in the plants displayed a plateau response. Availability of metals as indicated by Mehlich-I extraction and Ca(NO3)2 extraction were higher in amended plots as compared to control.
Speaker Information: Beshr Sukkariyah, VA. Tech., 609 Broce Drive, Blacksburg, VA 24060; Phone:
540-953-1612; E-mail: [email protected]
Session Information: Tuesday, November 4, 2003, 4:00 PM-6:00 PM Presentation Start: 4:00 PM (Poster Board Number: 1508)
