@article{PAR00001577,
  title = {{S}torage and forms of organic carbon in a no-tillage under cover crops system on clayey {O}xisol in dryland rice production ({C}errados, {B}razil)},
  author = {{M}etay, {A}ur{\'e}lie and {M}oreira, {J}. {A}. {A}. and {B}ernoux, {M}artial and {B}oyer, {T}homas and {D}ouzet, {J}. {M}. and {F}eigl, {B}. and {F}eller, {C}hristian and {M}araux, {F}. and {O}liver, {R}. and {S}copel, {E}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he management and enhancement of soil organic carbon ({SOC}) is very important for agriculture (fertility) as well as for the environment (carbon ({C}) sequestration). {C}onsequently, changes in soil management may alter {SOC} content. {N}o-tillage ({NT}) practices are potential ways to increase {SOC}. {W}e studied the {SOC} from agricultural soils in the {C}errados in {C}entral {B}razil. {W}e compared two different tillage systems: conservation agriculture with no-tillage under cover crops ({NT}) and disc tillage ({DT}) for 5 years in a context of rainfed rice production. {T}he soil is a dark red {O}xisol with high clay content (about 40%). {T}he objectives of the study were: (i) to evaluate the short-term (5 years) impact of tillage systems on {SOC} stocks in an {O}xisol and (ii) to better understand the dynamics of {SOC} in different fractions of this soil. {W}e first studied the initial situation in 1998, and compared it to the 2003 situation. {NT} with cover crop ({C}rotalaria) was found to increase the storage of {C} in the topsoil layer (0-10 cm) compared to {DT}. {T}he difference observed for the 0-10 cm layer under {NT} in comparison with {DT} represented {C} enrichment under no-tillage amounting to 0.35 {M}g {C} ha(-1) year(-1) and corresponding to less than 10% of cover crops residues returned to the soil. {A} particle-size fractionation of soil organic matter ({SOM}) showed that differences in total {SOC} between {NT} and {DT} mainly affected the 0-2 mu m fraction and, to a smaller extent the 2-20 mu m fraction. {T}his specific enrichment of {SOC} in the silt and clay fraction was attributed to (i) the storage of a water soluble {C} in the field and (ii) the effect of soil biota and especially fauna activity. {T}he mean residence time of carbon associated with the fine fractions being rather long, it might be assumed that the preferential storage in fine fractions resulted in a long-term carbon storage. {T}his study suggests a positive short-term effect of a no-tillage system on {C} sequestration in an {O}xisol.},
  keywords = {oxisol ; no tillage ; carbon sequestration ; particle size fractionation of {SOM} ; {C}errados ; {B}razil},
  booktitle = {},
  journal = {{S}oil and {T}illage {R}esearch},
  volume = {94},
  numero = {1},
  pages = {122--132},
  ISSN = {0167-1987},
  year = {2007},
  DOI = {10.1016/j.still.2006.07.009},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00001577},
}