@article{fdi:010057189,
  title = {{T}esting the application of an agronomic concept to microbiology : a degree-day model to express cumulative co(2) emission from soils},
  author = {{H}amdi, {S}alwa and {C}hevallier, {T}iphaine and {B}ernoux, {M}artial},
  editor = {},
  language = {{ENG}},
  abstract = {{A}lthough much research has been carried out, there is still no consensus about the temperature dependence of {CO}2 emissions from soil organic carbon ({SOC}) decomposition. {T}he temperature sensitivity of soil {CO}2 emissions varies with the time and the temperature levels used in laboratory experiments. {A}lthough combined models have been used to take account of the incubation time and temperature to describe the decomposition of {SOC}, the factors temperature and time in these models are still independent. {T}hese models were fitted to {CO}2 data obtained from parallel laboratory incubations. {I}n this study, sequential incubations were carried out for 2 months at temperatures between 20 degrees {C} and 50 degrees {C}, assuming that (1) the sequence of temperature levels did not affect the soil {CO}2 emissions and (2) the {CO}2 emissions depended only on the temperature sum accumulated by the soil. {A} degree-day model, which is commonly used in agronomy, was applied to predict soil {CO}2 emission variations with time and temperature. {T}he results showed that, for any sequence of temperature levels, the accumulation of degree-days explained the cumulative {CO}2 emissions during two months laboratory incubation over the 20-40 degrees {C} range, where 6% of {SOC} was emitted as {CO}2. {H}owever, at 50 degrees {C}, soil {CO}2 emissions were higher than predicted by the degree-day model. {T}his underestimation of soil {CO}2 emissions lasted for one month after the soil had been at 50 degrees {C}. {T}hese results suggest that, for the range of incubation temperatures (20-40 degrees {C}) and time tested (56 days), or 2000 degree-days, (i) the degree-day model is valid only between 20 and 40 degrees {C}, (ii) the main determinant of soil temperature sensitivity is the amount of labile carbon rather than microbial adaptation of soil respiration to temperature.},
  keywords = {{CO}2 emissions ; {D}egree-day model ; {Q}(10) ; {T}emperature ; {S}oil respiration},
  booktitle = {},
  journal = {{E}uropean {J}ournal of {A}gronomy},
  volume = {43},
  numero = {},
  pages = {18--23},
  ISSN = {1161-0301},
  year = {2012},
  DOI = {10.1016/j.eja.2012.05.003},
  URL = {https://www.documentation.ird.fr/hor/fdi:010057189},
}