@article{PAR00008318,
  title = {{M}etabolic capacities of microorganisms from a long-term bare fallow},
  author = {{G}uenet, {B}. and {J}uarez, {S}. and {B}ardoux, {G}. and {P}outeau, {V}. and {C}heviron, {N}. and {M}arrauld, {C}. and {A}bbadie, {L}uc and {C}henu, {C}.},
  editor = {},
  language = {{ENG}},
  abstract = {{S}oil degradation due to erosion or to soil organic matter ({SOM}) depletion is known to reduce the ecosystems services performed by soils. {A}mendments of organic matter are often proposed to restore the soil quality as they may increase water holding capacity, microbial activity and decrease erosion. {I}n this work, we tested the ability of microbial communities from a soil very depleted in organic matter to mineralize fresh organic matter. {W}e used a soil deprived of organic matter inputs since 1929 as a model of degraded soil. {W}e amended it with (13){C}-cellulose or (13){C}-straw at two different levels (0.5 g {C} kg(-1) of soil vs. 5 g {C} kg(-1)). {T}he same treatments were performed on an arable soil as control. {T}he soils were incubated at 20 degrees {C} during 209 days and the amount of {CO}(2) released and delta(13){C}-{CO}(2) were monitored during incubation. {W}e measured the microbial biomass by fumigation extraction and determined the metabolic profiles of microorganisms by using {B}iolog ({R}) {ECOP}lates. {T}he straw and cellulose were mineralized without lag-time in both soils. {I}t suggested that the bare fallow soil had kept its metabolic capacities to degrade straw and cellulose, but at a lower rate when compared to the arable control soil. {T}he {S}hannon index ({H}) calculated from {B}iolog ({R}) {ECOP}lates was very high in the two types of soils, which suggest that the two microbial communities were ubiquist. {M}oreover, the bare fallow microbial community was efficient to mineralize the amino acids and the mannitol in the {B}iolog ({R}) {ECOP}lates. {C}onsequently, we assumed that the bare fallow soil microbial community had kept its metabolic capacities because of the microbial turnover. {T}he dead microbial biomass might be an important substrate for the microbial community explaining why it may easily mineralize labile organic matter such as straw or cellulose.},
  keywords = {{F}resh organic matter ; (13){C}-straw ; (13){C}-cellulose ; {M}ineralization ; {B}are ; fallow soil ; {A}rable soil ; {B}iolog ({R}) {ECOP}lates},
  booktitle = {},
  journal = {{A}pplied {S}oil {E}cology},
  volume = {51},
  numero = {},
  pages = {87--93},
  ISSN = {0929-1393},
  year = {2011},
  DOI = {10.1016/j.apsoil.2011.07.006},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00008318},
}