@article{fdi:010046045,
  title = {{C}arbon and nitrogen stocks in a {B}razilian clayey oxisol : 13-year effects of integrated crop-livestock management systems},
  author = {{M}archao, {R}. {L}. and {B}ecquer, {T}hierry and {B}runet, {D}idier and {B}albino, {L}. {C}. and {V}ilela, {L}. and {B}rossard, {M}ichel},
  editor = {},
  language = {{ENG}},
  abstract = {{I}ntegrated crop-livestock management systems ({ICLS}) have been increasingly recommended in {B}razilian agroecosystems. {H}owever, knowledge of their effect on soil organic carbon ({SOC}) and total nitrogen ({TN}) concentrations and stocks is still limited. {T}he study was undertaken to evaluate the effects of {ICLS} under two tillage and fertilization regimes on {SOC} and {TN} concentrations and stocks in the 0-30 cm soil layer, in comparison with continuous crops or pasture. {T}he following soil management systems were studied: continuous pasture; continuous crop; 4 years' crop followed by 4 years' pasture and vice-versa. {T}he adjacent native {C}errado area was used as a control. {U}nder the rotation and continuous crop systems there were two levels of soil tillage (conventional and no-tillage) and fertility (maintenance and corrective fertility). {T}he stock calculations were done using the equivalent soil mass approach. {T}he land use systems had a significant effect on the concentrations of {SOC} and {TN} in the soil, but no effect was observed for the soil tillage and fertilizer regimes. {F}or these two latter, some significant discrepancies appeared in the distribution of {SOC} and {TN} concentrations in the 0-30 cm layer. {C}arbon storage was 60.87 {M}g ha(-1) under {C}errado, and ranged from 52.21 {M}g ha(-1) under the {ICLS} rotation to 59.89 {M}g ha(-1) with continuous cropping. {T}he decrease in {SOC} stocks was approximately 8.5 and 7.5 {M}g ha(-1), or 14 and 12%, for continuous pasture and {ICLS} respectively. {N}o-tillage for 10 years after the conversion of conventional tillage to no-tillage under the continuous crop system, and 13 years of conventional tillage in continuous cropping did not result in significant changes in {SOC} stocks. {T}he {SOC} and {TN} stocks in surface layers, using the equivalent soil mass approach rather than the equivalent depth, stress the differences induced by the calculation method. {A}s soil compaction is the principal feature of variability of stocks determinations, the thickness should be avoid in these types of studies.},
  keywords = {{B}razilian {C}errado ; {C}arbon and nitrogen sequestration ; {N}o-tillage ; {C}rop-pasture rotation ; {NIR} spectroscopy},
  booktitle = {},
  journal = {{S}oil and {T}illage {R}esearch},
  volume = {103},
  numero = {2},
  pages = {442--450},
  ISSN = {0167-1987},
  year = {2009},
  DOI = {10.1016/j.still.2008.11.002},
  URL = {https://www.documentation.ird.fr/hor/fdi:010046045},
}