@article{fdi:010069936,
  title = {{S}oil organic carbon changes after deforestation and agrosystem establishment in {A}mazonia : an assessment by diachronic approach},
  author = {{F}ujisaki, {K}. and {P}errin, {A}.{S}. and {G}arric, {B}. and {B}alesdent, {J}. and {B}rossard, {M}ichel},
  editor = {},
  language = {{ENG}},
  abstract = {{D}eforestation and agrosystem establishment can alter soil organic carbon ({SOC}) stocks, leading to greenhouse gases emissions and fertility losses, however {SOC} response has great variability. {I}n the humid tropics like the {A}mazonia biome, carbon inputs from agrosystems are rarely quantified and described, despite their major contribution to the {SOC} dynamics after deforestation. {W}e assessed {SOC} dynamics with repeated measurements in the layer 0–30 cm until five years after deforestation in a diachronic site in {F}rench {G}uiana, cleared with a fire-free method associated to large woody debris inputs. {T}hree agrosystems were studied: one year maize/soybean rotation with disk tillage ({DT}) and without tillage ({NT}), and a mowed grassland ({G}). {A}boveground carbon inputs from agrosystems were measured. {I}n addition to {SOC} stocks assessment, we measured roots carbon stocks, and performed δ13{C} measurements in grassland soil. {W}e found a transient {SOC} stock increase until 1.5 years after deforestation because of large woody debris inputs from deforestation method, but these {C} inputs were rapidly mineralized and poorly contributed to {SOC} stocks 5 years after deforestation. {SOC} stocks in grassland did not differ from forest despite large hay exports. {T}hanks to large root-derived carbon inputs, {C}4-{SOC} stock in grassland was 10.4 t ha−1 5 years after deforestation (18.7% of the {SOC} stock). {I}n annual crops, 5 years after deforestation, {SOC} stocks decreased on average by 18.6% compared to forest. {SOC} stocks did not differ according to soil tillage since aboveground carbon inputs were similar in {DT} and {NT} systems. {L}ower {SOC} stocks in annual crops compared to grassland is explained by lower carbon restitutions and by higher mineralization rate of organic matter.},
  keywords = {{GUYANE} {FRANCAISE} ; {AMAZONIE}},
  booktitle = {},
  journal = {{A}griculture, {E}cosystems and {E}nvironment},
  volume = {245},
  numero = {},
  pages = {63--73},
  ISSN = {0167-8809},
  year = {2017},
  DOI = {10.1016/j.agee.2017.05.011},
  URL = {https://www.documentation.ird.fr/hor/fdi:010069936},
}