@article{fdi:010060356,
  title = {{S}oil crusting impact on soil organic carbon losses by water erosion},
  author = {{M}aiga-{Y}aleu, {S}. and {G}uiguemde, {I}. and {Y}acouba, {H}. and {K}arambiri, {H}. and {R}ibolzi, {O}livier and {B}ary, {A}. and {O}uedraogo, {R}. and {C}haplot, {V}incent},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he {S}ahelian region, characterized by erratic, heavy rainfalls and low soil organic carbon ({SOC}) stocks, is highly vulnerable to land degradation. {W}hile water erosion is recognized as being a main mechanism of {SOC} losses, little research-has yet been done to investigate the role which soil surface crusting might have on {SOC} losses. {T}he main objective of this study was to evaluate the impact of soil surface crusting on {SOC} losses. {T}his study was conducted in {T}ougou {C}atchment (37 km(2)), northwest of {B}urkina {F}aso, which receives a cumulative mean annual rainfall of 500 mm y(-1). {T}he area is characterized by sandy soils with varying types of surface crusts. {T}he four different crust types studied were: structural crusts ({STRU}), which were found under cultivated soils, which were plowed annually; perennial desiccation crusts ({DES}), gravel ({GRAV}) and erosion ({ERO}) crusts, generally found in the degraded semi-arid savannas. {T}hree micro-scale runoff plot (1 x 1 m(2)) replicates were installed on each of the different types of surface crusts observed in the catchment. {W}ater and sediment samples were collected from the runoff plots after every rainfall event (n = 10) of the 2011 rainy season. {T}he sediment samples were analyzed for organic carbon ({OC}sed), while the water samples were examined for dissolved organic carbon ({DOC}). {T}he average of organic carbon losses with sediment ({OC}({L})sed), was 037 g {C} m(-2) y(-1) for {ERO}, 036 g {C} m(-2) y(-1) for {DES}, 024 g {C} m(-2) y(-1) for {STRU} and 0.15 g {C} m(-2) y(-1) for {GRAV}. {DOC} accounted for a minute contribution to {SOC} losses i.e. less than 0.05%. {STRU} with 10.42 mg {C} l(-1) showed the highest {DOC} content, followed by {GRAV} (6.13 mg {C} l(-1)), {DES} (5.06 mg {C} l(-1)) and {ERO} (4.92 mg {C} l(-1)). {T}he {OC} enrichment ratio ({ER}) of sediments to that of the 0-0.1 m bulk soil was less than one for {DES}, {GRAV} and {ERO} (0.39, 0.69 and 0.75, respectively) and reached 1.14 for {STRU}. {T}his pointed to a greater {SOC} protection from erosion by the perennial crusts of the degraded savannas ({DES}, {GRAV} and {ERO}), as compared to crusts of cultivated fields. {T}hick, sand-enriched crusts, {DES} and {GRAV}, seemed to provide the greatest {OC} protection. {T}his study pointed out a significant relationship between soils crusting on {SOC} erosion. {I}t showed that the formation of loose and sandy crusts provides greater {SOC} protection from water erosion, which in turn may improve {SOC} stabilization and associated soil functions, such as soil fertility, water-holding capacity and sequestration of atmospheric carbon.},
  keywords = {{E}rosion ; {S}oil organic carbon ; {S}oil surface crust ; {E}nrichment ratio ; {S}emi-arid area ; {ZONE} {SAHELIENNE} ; {BURKINA} {FASO}},
  booktitle = {},
  journal = {{C}atena},
  volume = {107},
  numero = {},
  pages = {26--34},
  ISSN = {0341-8162},
  year = {2013},
  DOI = {10.1016/j.catena.2013.03.006},
  URL = {https://www.documentation.ird.fr/hor/fdi:010060356},
}