dc.contributorGLACIELA KASCHUK, CNPSo; ODAIR ALBERTON, CNPSo; MARIANGELA HUNGRIA DA CUNHA, CNPSO.
dc.creatorKASCHUK, G.
dc.creatorALBERTON, O.
dc.creatorHUNGRIA, M.
dc.date2010
dc.date2010-12-03
dc.date.accessioned2017-03-06T19:38:51Z
dc.date.available2017-03-06T19:38:51Z
dc.identifier31551
dc.identifierdoi:10.1016/j.soilbio.2009.08.020
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/271203
dc.descriptionSoil microbial biomass plays important roles in nutrient cycling, plant?pathogen suppression, decomposition of residues and degradation of pollutants; therefore, it is often regarded as a good indicator of soil quality. We reviewed more than a hundred studies in which microbial biomass-C (MB-C), microbial quotient (MB-C/TSOC, total soil organic carbon) and metabolic quotient (qCO2) were evaluated with the objective of understanding MB-C responses to various soil-management practices in Brazilian ecosystems. These practices included tillage systems, crop rotations, pastures, organic farming, inputs of industrial residues and urban sewage sludge, applications of agrochemicals and burning. With a metaanalysis of 233 data points, we confirmed the benefits of no-tillage in preserving MB-C and reducing qCO2 in comparison to conventional tillage. A large number of studies described increases in MB-C and MB-C/TSOC due to permanent organic farming, also benefits from crop rotations particularly with several species involved, whereas application of agrochemicals and burning severely disturbed soil microbial communities. The MB-C decreased in overgrazed pastures, but increased in pastures rotated with wellmanaged crops. Responses of MB-C, MB-C/TSOC and qCO2 to amendment with organic industrial residues varied with residue type, dose applied and soil texture. In conclusion, MB-C and related parameters were, indeed, useful indicators of soil quality in various Brazilian ecosystems. However, direct relationships between MB-C and nutrient-cycling dynamics, microbial diversity and functionality are still unclear. Further studies are needed to develop strategies to maximize beneficial effects of microbial communities on soil fertility and crop productivity.
dc.description2010
dc.languagept_BR
dc.publisherSoil Biology & Biochemistry, Oxford, v. 42, p. 1-13, 2010.
dc.relationEmbrapa Soja - Artigo em periódico indexado (ALICE)
dc.subjectBiomassa
dc.subjectMicrobiologia do solo
dc.subjectMicrobial biomass
dc.subjectSoil microorganisms
dc.subjectSoil quality
dc.titleThree decades of soil microbial biomass studies in Brazilian ecosystems: lessons learned about soil quality and indications for improving sustainability.
dc.typeArtículos de revistas


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