@article{PAR00003627,
  title = {{M}icrobial biomass, enzyme and mineralization activity in relation to soil organic {C}, {N} and {P} turnover influenced by acid metal stress},
  author = {{L}i, {Y}. {T}. and {R}ouland, {C}orinne and {B}enedetti, {M}. and {L}i, {F}. {B}. and {P}ando, {A}nne and {L}avelle, {P}atrick and {D}ai, {J}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}his study focused on the potential of using soil microbial biomass, enzyme and mineralization activities involved in organic {C}, {N} and {P} turnover, to evaluate the quality of a subtropical agricultural soil affected by long-term acid metal stress. {F}ractions of {C}, {N} and {P} involved in soil organic matter, microbial biomass and mineralization processes were estimated. {T}otal enzyme activity ({FDA}) and eight hydrolase activities (xylanase, amylase, beta-glucosidase, invertase, {N}-acteyl-glucosaminidase, urease, alkaline and acid phosphatases) in different decomposition stages of organic {C}, {N} and {P} were selected to characterize the soil functional diversity. {T}hese biological datasets were compared with soil metal variables (total contents and free and ligand-complexed ions of {C}u, {P}b, {Z}n, {C}d, {A}l and {M}n), using principal component analyses, co-inertia and discriminant analyses. {T}he multiple statistics indicate that the metal variables were significantly related with not only general biological factors, but also respective datasets of biomass, enzyme activities and mineralization rates (all {P} < 0.001). {I}n general, metal variables were inversely related to parameters and indices of microbial biomass {C}, {N} and {P}, {FDA} and {C}-related polysaccharidase and heterosidase activities, and {P} mineralization. {A}s comparison, metal variables exhibited positive relationships with parameters and indices of {N}-related {N}-acteyl-glucosaminidase, urease, ammonification, total {N} mineralization and metabolic quotient, compared with inhibited nitrification. {S}pecifically, free and complexed metal cations showed higher bioavailability than total contents in most cases. {C}u, {P}b, {A}l and {M}n had different ecotoxicological impacts than {C}d and {Z}n did. {S}tepwise regression models demonstrated that metal variables are key stress factors, but most of them excluded soil p{H}. {F}urthermore, spatial distribution in land uses and of sampling sites clearly separated the soil samples in these models ({P}<0.001). {W}e conclude that such a statistical analysis of microbiological and biochemical indices can provide a reliable and comprehensive indication of changes in soil quality and organic nutrient cycling, after exposure to long-term acid metal stress.},
  keywords = {{A}mmonification ; {C}o-inertia analysis ; {E}nzyme ; {M}etal ions ; {M}ineralization ; {N}itrification},
  booktitle = {},
  journal = {{S}oil {B}iology and {B}iochemistry},
  volume = {41},
  numero = {5},
  pages = {969--977},
  ISSN = {0038-0717},
  year = {2009},
  DOI = {10.1016/j.soilbio.2009.01.021},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00003627},
}