@article{fdi:010068193,
  title = {{E}arthworm and organic amendment effects on microbial activities and metal availability in a contaminated soil from {C}hina},
  author = {{Z}hang, {C}. and {M}ora, {P}. and {D}ai, {J}. and {C}hen, {X}. {F}. and {G}iusti-{M}iller, {S}. and {R}uiz {C}amacho, {N}uria and {V}elasquez, {E}. and {L}avelle, {P}atrick},
  editor = {},
  language = {{ENG}},
  abstract = {{W}e tested the effect of an addition of organic matter ({OM}: 10% of a mixture of coconut bran and cattle dung) and/or earthworm inoculation (15 g fresh weight kg(-1) soil) in a soil polluted by metals on microbial activities and concentrations of metal {DTPA} extractable fractions. {T}he experiment, conducted under laboratory conditions, lasted for 60 days. {S}oil organic {C} and total {N} in control were 15.3and 1.47 mg kg(-1), and total {Z}n, {C}d, {P}b and {C}u contents, 405, 0.639, 439 and 394 mg kg(-1), respectively. {T}he native earthworm species {A}mynthas morrisi exhibited 91.5% mortality in the un-amended polluted soil, whereas only 20% of {E}isenia fetida individuals died. {I}n the {OM} treatment the native species performed much better showing reproduction and a higher soil ingestion rate than {E}. fetida. {I}n both amended and non-amended soils, casts exhibited higher concentrations of total organic {C} (+15.7 to 46.5%) and {N}(+13.3 to 59.3%) and alkali hydrolysable {N} (+78.0 to 133%), but not dissolved organic {C}. {M}icrobial enzymatic activities were significantly increased when {OM} was added to the soil (+142 to 456%), with the sole exception of acid phosphatase activity. {T}he addition of earthworms had contrasting effects on microbial activities: {N}-acetyl glucosamine activity was enhanced (+559 to 829%) while no significant difference was noted for other measured enzymatic activities. {I}ntroduction of earthworms in {OM} amended treatments tended to decrease all activities (-30.6 to -59.3%) although they were still higher than in the non-amended soil, especially for beta-glucosidase (+182 to 230%). {W}e noted no significant differences between the effects of the two earthworm species. {I}ncreased microbial activities resulting from the addition of organic matter did not substantially alter the availability of {Z}n, {C}d, {P}b and {C}u assessed by their association with {DTPA}. {E}arthworm increased the availability of {Z}n (up to +31%), {C}d (+78 to 193%) and decreased {P}b (down to -16.4%) in the non-amended treatment. {I}n the amended treatment earthworms induced an increase in {C}d (up to 18.8%), but a decrease in {Z}n availability. {T}otal {C}d available concentrations in the experimental units (in soil and casts when earthworms were present) increased from 36.2% in control soil to up to 46.1% after 60 days depending on treatments, while no significant changes were observed for other metals. {T}his rather important change obtained for {C}d in such a short amount of time indicates a possible environmental risk.},
  keywords = {{C}ontaminated soil ; {E}arthworms ; {O}rganic matter dynamics ; {M}icrobial activities ; {A}vailable metals ; {CHINE} ; {ZONE} {TROPICALE}},
  booktitle = {},
  journal = {{A}pplied {S}oil {E}cology},
  volume = {104},
  numero = {},
  pages = {54--66},
  ISSN = {0929-1393},
  year = {2016},
  DOI = {10.1016/j.apsoil.2016.03.006},
  URL = {https://www.documentation.ird.fr/hor/fdi:010068193},
}