@article{fdi:010049722,
  title = {{G}lomalin and carbon sequestration in cultivated tepetates = {G}lomalina secuestro de carbono en tepetates cultivados},
  author = {{B}aez-{P}erez, {A}. and {G}onzalez-{C}havez, {M}. {C}. {A}. and {E}tchevers-{B}arra, {J}. {D}. and {P}rat, {C}hristian and {H}idalgo-{M}oreno, {C}.},
  editor = {},
  language = {{SPA} ; {ENG}},
  abstract = {{T}he tepetates are hardened volcanic tuffs that outcrop on the surface due to erosive processes; some of them can be ameliorated for agriculture and thus sequester carbon ({C}). {T}his element accumulates in fragile aggregates that are formed as part of their developing physical structure after being cultivated, but the mechanism by which it is sequestered in the mineral fraction in these volcanic substrates is unknown. {I}t is assumed that the biological activity contributes to the stabilization of the organic {C} ({COS}), specifically that of the arbuscular mycorrhizal fungi ({AMF}). {I}t has been postulated that glomalin (a glycoprotein produced by the {AMP}) influences both processes. {T}o contribute to the comprehension of this phenomenon, the present study was made with the following objectives: 1) to evaluate the accumulation of {COS}, glomalin and glomalin carbon ({GC}) in cultivated tepetates; 2) to measure the contribution of {C} made by the glomalin to the {COS}; and 3) to evaluate the tendency of accumulation of {GC} with years of cultivation. {B}ased on interviews with producers of the {T}excoco {R}iver basin, 83 plots were selected with 10 to 20 years of cultivation, and 10 classes of agronomic management were defined ({I} to {X}). {A}s reference four {P}haesozem soils of the region were used, grouped in two classes of management. {A}nother 21 plots of tepetate had from 4 to over 100 years of cultivation. {T}epetate samples were collected (0-20 cm) and {COS}, glomalin and {GC} were determined. {T}he relationship between {COS} and the latter variables was close ({R}>0.91). {T}he agronomic management had significant influence (p <= 0.05) on the accumulation of {COS}, glomalin and {GC}. {A}s function of the maximum concentration of {COS} observed, it was calculated that the tepetates ameliorated for agricultural production after two decades of cultivation, with an agronomic management with constant incorporation of organic residues, have capacity for storing approximately 90 t ha(-1) of {C} in the first 20 cm of depth, with a contribution of 15 % of stabilized {C} from glomalin (p <= 0.05). {T}he accumulation of {GC} as a function of time followed a logarithmic tendency.},
  keywords = {carbon sequestration ; arbuscular micorrhyzic fungi ; agronomic ; management ; volcanic tuffs},
  booktitle = {},
  journal = {{A}grociencia},
  volume = {44},
  numero = {5},
  pages = {517--529},
  ISSN = {1405-3195},
  year = {2010},
  URL = {https://www.documentation.ird.fr/hor/fdi:010049722},
}