Effects of earthworm activity on fertility and heavy metal bioavailability in sewage sludge

Survival, Weight, and Prolificacy of Eisenia fetida (Savigny 1826) in Relation to Food Type and Several Soil Parameters

“…The decrease of potassium in soil in the presence of earthworms was previously found in fi eld literature [32][33][34], and this aspect necessitates further investigation. The fi ndings of Sangwan et al (2008) [35] [38] studied the potential of Eisenia fetida to improve the fertility of soil by comparing sewage sludge with and without earthworm treatment, and their results showed that earthworm activity had no signifi cant effect on the contents of total and available potassium.…”

Effect of the transit through the gut of earthworm (Eisenia fetida) on fractionation of Cu and Zn in pig manure

“…This is because earthworms ingest a considerable amount of OM, both in order to derive nutrients and the need of well balanced metabolism. Liu et al [33] also reported that the content of OM in sewage sludge treated with earthworm was less than that without earthworm treatment. In contrary to, Zhang and Schrader [34] observed about 1.2-2-fold increase in total C in earthworm casts compared with surrounding soil.…”

Fractionation and bioavailability of Cu in soil remediated by EDTA leaching and processed by earthworms (Lumbricus terrestris L.)

“…1). On the other hand, Liu et al (2005) concluded that inoculation of sewage sludge with Eisenia fetida reduced the uptake of Cu and Cd in Chinese cabbage. It would, thus, be improper to generalize the influence of earthworms on metal availability in soil, since it is affected by several factors, the most important being the soil properties and the earthworm species used ).…”