| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
Soil Science Dep., IACR-Rothamsted, Harpenden, Herts AL5 2JQ, UK.
* Corresponding author (steve.mcgrath{at}bbsrc.ac.uk).
ABSTRACT
Changes in the extractability and uptake by crops of sludge metals in a long-term field experiment, started in 1942, were measured to assess whether Zn and Cd are either fixed by the sludge/soil constituents or are released as the sludge organic matter (OM) decomposes. Total and 0.1 M CaCl2-extractable concentrations of Zn and Cd in soil and total concentrations in crops were measured on archived crop and soil samples. Extractability of Zn as a proportion of the total ranged from 0.5 to 3% and that of Cd from 4 to 18%, and were higher in sludge-amended than farmyard manure or fertilizer-amended soils. Over a 23-yr period after 1961, when sludge was last applied, the extractability of both metals fluctuated, but neither decreased or increased consistently. The relationships between total soil and crop metal concentrations were linear, with no evidence of a plateau across the range of soil metal concentrations achieved. The slopes of the soil-plant relationships depended on the type of crop or crop part examined, but were generally in the order red beet (Beta vulgaris L.) > sugar beet (Beta vulgaris L.) > carrot (Daucus carota L.) > barley (Hordeum vulgare L.). However, there also were large seasonal differences in metal concentrations in the crops. It is concluded from the available evidence that up to 23 yr after sludge applications cease, Zn and Cd extractability and bioavailability do not decrease.
This article has been cited by other articles:
|
|
 |
|
  T. H. Skaggs, N. J. Jarvis, E. M. Pontedeiro, M. Th. van Genuchten, and R. M. Cotta Analytical Advection Dispersion Model for Transport and Plant Uptake of Contaminants in the Root Zone Vadose Zone J., November 20, 2007; 6(4): 890 - 898. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 R. Clemente, C. de la Fuente, R. Moral, and M. P. Bernal Changes in Microbial Biomass Parameters of a Heavy Metal-Contaminated Calcareous Soil during a Field Remediation Experiment J. Environ. Qual., June 27, 2007; 36(4): 1137 - 1144. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
I. Hilber, A. Voegelin, K. Barmettler, and R. Kretzschmar Plant Availability of Zinc and Copper in Soil after Contamination with Brass Foundry Filter Dust: Effect of Four Years of Aging J. Environ. Qual., January 9, 2007; 36(1): 44 - 52. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
B. F. Sukkariyah, G. Evanylo, L. Zelazny, and R. L. Chaney Cadmium, Copper, Nickel, and Zinc Availability in a Biosolids-Amended Piedmont Soil Years after Application J. Environ. Qual., November 7, 2005; 34(6): 2255 - 2262. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
P. Bergkvist and N. Jarvis Modeling Organic Carbon Dynamics and Cadmium Fate in Long-Term Sludge-Amended Soil J. Environ. Qual., January 1, 2004; 33(1): 181 - 191. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
C. Keller, S. P. McGrath, and S. J. Dunham Trace Metal Leaching through a Soil-Grassland System after Sewage Sludge Application J. Environ. Qual., September 1, 2002; 31(5): 1550 - 1560. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. M. Chaudri, C. M.G. Allain, S.H. Badawy, M. L. Adams, S. P. McGrath, and B. J. Chambers Cadmium Content of Wheat Grain from a Long-Term Field Experiment with Sewage Sludge J. Environ. Qual., September 1, 2001; 30(5): 1575 - 1580. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
| The SCI Journals | Agronomy Journal | Crop Science | |||
| Journal of Natural Resources and Life Sciences Education |
Vadose Zone Journal | ||||
| Soil Science Society of America Journal | Journal of Plant Registrations | The Plant Genome | |||
