Plant accumulation of potentially toxic elements in sewage sludge as affected by soil organic matter level and mycorrhizal fungi

Awduron Sefydliadau
Math Erthygl
Iaith wreiddiolSaesneg
Tudalennau (o-i)293-300
Nifer y tudalennau8
CyfnodolynEnvironmental Pollution
Rhif y cyfnodolyn2
Dyddiad ar-lein cynnar09 Tach 2001
Dangosyddion eitem ddigidol (DOIs)
StatwsCyhoeddwyd - 01 Chwef 2002
Cysylltiad parhaol

Cysylltiad parhaol

Gweld graff cysylltiadau
Fformatau enwi


Leek (Allium ameloprasum) was grown in pot trials in two clay loams of contrasting organic contents, with and without indigenous mycorrhizal propagules. Sewage sludges containing varying levels of Cd, Cu and Zn were added. Extractable soil metals, plant growth, major nutrient content and accumulation of metals, and soil microbial indices were investigated. The aim was to establish whether soil organic content and mycorrhizal status affected plant and microbial exposure to these metals. Extractable metals were higher and responses to inputs more pronounced in the arable, lower organic matter soil, although only Cd showed a soil difference in the CaCl2 fraction. There were no metal toxic effects on plants and some evidence to suggest that they promoted growth. Uptake of each metal was higher in the larger plants of the grassland, higher organic matter soil. Inoculation with arbuscular mycorrhizal fungi increased root Cd and Zn concentrations. With the exception of Cd (roots) and Zn (shoots), higher inputs of sludge metals did not increase plant metals. Zn and Cu, but not Cd, concentrations were higher in roots than in shoots.