@article{fdi:010085124,
  title = {{C}rop residues differ in their decomposition dynamics : review of available data from world literature},
  author = {{N}tonta, {S}. and {M}athew, {I}. and {Z}engeni, {R}. and {M}uchaonyerwa, {P}. and {C}haplot, {V}incent},
  editor = {},
  language = {{ENG}},
  abstract = {{D}ecomposition of crop residues may affect soil organic carbon ({C}) stocks, which are key for soil fertility improvement and mitigation of climate change. {N}umerous independent studies across the world point to contradictory results but their existence provides an opportunity to conduct a comprehensive analysis of the impact of crop type on residue decomposition. {I}n the present study, data from 394 trials from across the world were used to assess cumulative {CO}2 emissions from residues of 17 crops during 0-30, 0-90 and 0-120 days (i.e. {CR}30, {CR}90 and {CR}120; 1-[{CR}30/{CR}120] ratio as a stability index of {C} emissions) and to relate the results with residue quality ({C}, {N} and lignin concentrations) and selected soil properties (texture, p{H}, soil organic carbon concentration). {A}t all durations, legumes exhibited the highest {CO}2 emissions per gram of {C} added (1003 mg {CO}2-{C} gxfffd; 1{C} after 120 days) followed by grasses (9 4 7), oilseed crops (9 4 4) and cereals (8 4 6), with the legumes and grasses showing the lowest temporal stability of {C} emission as pointed out by a 1-[{CR}30/{CR}120] of 0.78 and 0.79, respectively, versus 0.82 and 0.83 for cereals and oilseed crops. {A}t all durations, maize residues emitted the least {C}-{CO}2 (86, 275 and 495 mg {CO}2-{C} gxfffd; 1{C}), followed by two other lignin rich crops (cotton and sunflower), while the highest emissions were from {A}lfalfa residues that produced about 4 times more {CO}2 (e.g. 359 at {CR}30 and 1319 at {CR}120) than maize. {O}verall, {CO}2 emissions were positively correlated with soil clay concentration (r > 0.22), residue {C} concentration (e.g. r = 0.46 at {CR}90 and r = 0.37 with emission stability, {P} < 0.05) but negatively to residue {N} concentration (r = -0.26 at {CR}120, {P} < 0.05). {T}he global trend pointed to decreased {CO}2 emissions with increasing residue lignin. {C}ontrary to what is generally believed, providing the soil with high lignin and high {N} concentration may foster {C} stabilization into soils by soil microbes.},
  keywords = {{C}rop residue decomposition ; {C} emissions ; {S}oil carbon stabilisation ; {S}oil {C} stocks},
  booktitle = {},
  journal = {{G}eoderma},
  volume = {419},
  numero = {},
  pages = {115855 [14 ]},
  ISSN = {0016-7061},
  year = {2022},
  DOI = {10.1016/j.geoderma.2022.115855},
  URL = {https://www.documentation.ird.fr/hor/fdi:010085124},
}