@article{fdi:010045383,
  title = {{M}odification of {P} availability by endogenic earthworms ({G}lossoscolecidae) in {F}erralsols of the {M}alagasy {H}ighlands},
  author = {{C}hapuis {L}ardy, {L}ydie and {R}amiandrisoa, {R}.{S}. and {R}andriamanantsoa, {L}. and {M}orel, {C}. and {R}abeharisoa, {L}. and {B}lanchart, {E}ric},
  editor = {},
  language = {{ENG}},
  abstract = {{L}ow phosphorus ({P}) availability in {F}erralsols of the {M}alagasy {H}ighlands is a major limitation to crop growth. {D}irect seeding mulch-based cropping practices which were adopted in the region to improve and sustain soil fertility are known to favour earthworms' presence. {T}he mesocosm study aims to analyse the effect of an endogeic geophageous earthworm species on the soil {P} status. {T}otal {P} content ({P} (t)), {N}a{OH}-extractable {P} content, {P} ions ({P}i) concentration ({C} (p)) in solution and rapid and slow reactions of {P}i in solution with solid phase were determined in two {M}alagasy {F}erralsols. {B}oth {C} (p) and reactions rates were assessed in laboratory batch experiments using (32){P}i labelling and isotopic exchange kinetics ({IEK}). {T}he {P} (t) values were 836 and 349 mg {P} g(-1) in a clayey soil and a sandy-clayey soil, respectively. {F}or both soils, {N}a{OH}-extractable organic {P} was significantly higher in earthworm casts than in parent soils, whereas {P}t was unchanged. {A}lso, the effect of earthworm ingestion significantly changed parameters of the {IEK}. {I}n casts compared with the soil from which they were derived, the immediate isotopically exchangeable {P}i ({E} (1 min)) increased by 116%, whereas relative rates of {P}i release at the solid-to-solution with time were slightly lowered. {T}he effect of earthworm ingestion on {IEK} corresponded to a transfer of slowly exchangeable {P}i towards quicker {P}i pools of exchange. {H}owever, according to the literature, the increase in {E} (1 min) remained below the critical level for optimal growth, stating that the soils remained {P}-deficient even in the presence of active and numerous earthworms.},
  keywords = {{FERTILITE} {DU} {SOL} ; {DISPONIBILITE} {EN} {NUTRIMENTS} ; {PHOSPHORE} ; {LOMBRIC} ; {HAUTE} {ALTITUDE} ; {BIODISPONIBILITE} ; {ZONE} {TROPICALE} ; {MADAGASCAR} ; {ANDRANOMANELATRA} ; {LAZAINA}},
  booktitle = {},
  journal = {{B}iology and {F}ertility of {S}oils},
  volume = {45},
  numero = {4},
  pages = {415--422},
  ISSN = {1432-0789},
  year = {2009},
  DOI = {10.1007/s00374-008-0350-y},
  URL = {https://www.documentation.ird.fr/hor/fdi:010045383},
}