@article{fdi:010013328,
  title = {{D}istribution of soil fractions and location of soil bacteria in a vertisol under cultivation and perennial grass},
  author = {{K}abir, {M}. and {C}hotte, {J}ean-{L}uc and {R}ahman, {M}. and {B}ally, {R}. and {J}octeur {M}onrozier, {L}.},
  editor = {},
  language = {{ENG}},
  abstract = {{E}ffects of soil management on soil characteristics were investigated on the rhizosphere ({RPP}) and the non-rhizosphere ({NRPP}) siol of a re-grass vertisol under #{D}igitaria decumbens$ and in the soil under continuous cultivation ({CC}). {A} low energy technique allowed to separate eight size and density fractions, including macro- and micro-aggregates while preserving soil bacteria. {O}rganic {C} and {N}, microbial biomass {C} and the number of total bacteria ({AODC}) and of #{A}zospirillum brasilense$ and their distribution were determined in soil fractions isolated from the {CC}, {NRPP} and {RPP} soils. {S}oil macroaggregates (>2000 micrometers) were similarly predomminant in the {NRPP} and {RPP} soils when the dispersible clay size fraction (<2 micrometers) represented more than 25% of the {CC} soil mass. {T}he main increase of {C} content in {RPP} originated from the macroaggregates (>2000 micrometers) and from the root fraction, not from the finer separates. {T}he proportion of organic {C} as microbial biomass {C} revealed the low turnover of microbial {C} in the {PP} situations, especially in the clay size fraction of the {NRPP} soil. {A} common shift of {AODC} toward the finer separates from planted soils ({CC} and {RPP}) revealed the influence of living plants on the distribution of soil bacteria. {T}he relative abundance of #{A}. brasilense$ showed the presence of the active roots of #{D}igitaria$ in the macroaggregates and their contact with the dispersible clay size fraction of the rhizosphere soil. ({R}{\'e}sum{\'e} d'auteur)},
  keywords = {{BIOLOGIE} {DU} {SOL} ; {BACTERIE} ; {NUMERATION} ; {VERTISOL} ; {BIOMASSE} ; {HERBACEE} ; {DENSITE} {DE} {POPULATION} ; {AGREGAT}},
  booktitle = {},
  journal = {{P}lant and {S}oil},
  volume = {163},
  numero = {2},
  pages = {243--255},
  ISSN = {0032-079x},
  year = {1994},
  DOI = {10.1007/{BF}00007974},
  URL = {https://www.documentation.ird.fr/hor/fdi:010013328},
}