Por favor, use este identificador para citar o enlazar este ítem: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/569604
Registro completo de metadatos
Campo DCValorLengua/Idioma
dc.contributor.authorMENDES, I. de C.pt_BR
dc.contributor.authorREIS JUNIOR, F. B. dospt_BR
dc.date.accessioned2011-07-08T11:49:56Z-
dc.date.available2011-07-08T11:49:56Z-
dc.date.created2006-06-07pt_BR
dc.date.issued2004pt_BR
dc.identifier.citationPlanaltina, DF: Embrapa Cerrados, 2004.pt_BR
dc.identifier.urihttp://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/569604pt_BR
dc.descriptionABSTRACT: Every factor that has a negative impact on soil microorganisms sooner or later will reflect in a deterioration of soil chemical and physical properties specially, those related to soil organic matter losses. This paper was based on a talk presented at "The International Symposium of Indicators of Soil Quality" held on Marco Juarez-Argentina. Some of the aspects related to the concept of soil quality and biological indicators of soil quality, were reviewed. Results of the studies related to the characterization of soil microbial biomass, respiration and enzymes activities on different agroecosystems of the Cerrado region also are presented. Soil microbial biomass, microbial respiration, and the activities of soil enzymes (acid phosphatase, glucosidase and arilsufatase) have been evaluated at Embrapa Cerrados, since 1998. The objective of these studies is to determine the impact of different agricultural management systems (conventional tillage and no-tillage) on soil functioning and to evaluate the possibility of using these parameters as biological indicators of soil quality. Soil samples were collected at the 0 to 5 cm abd 5 to 20 cm depths, during the dry (August) and the rainy (January) seasons. In relation to a native Cerrado, located near the experiments, significant reductions in microbial biomass and phosphatase activity were observed in the agricultural areas. At the 0 to 5 cm depth, the no-tillage (NT) system presented higher levels of phosphatase, arilsufatase and glucosidase activities as compared to the conventional tillage (CT). These effects were related to the lack of soil mechanical preparation, fertilizers' placement, and to the accumulation of crop residues at the soil surface.pt_BR
dc.language.isoporpt_BR
dc.relation.ispartofseries(Embrapa Cerrados. Documentos, 112).pt_BR
dc.rightsopenAccesspt_BR
dc.subjectBiiomassapt_BR
dc.subjectMicrobial florapt_BR
dc.subjectEnzymic activitypt_BR
dc.titleUso de parâmetros microbiológicos como indicadores para avaliar a qualidade do solo e a sustentabilidade dos agroecossistemas.pt_BR
dc.typeFolhetospt_BR
dc.date.updated2011-07-08T11:49:56Zpt_BR
dc.subject.thesagroBioquímica do Solopt_BR
dc.subject.thesagroAtividade Enzimáticapt_BR
dc.subject.thesagroCerradopt_BR
dc.subject.thesagroMicrobiologia do Solopt_BR
dc.subject.thesagroPopulação Microbianapt_BR
dc.subject.nalthesaurusbiochemistrypt_BR
dc.subject.nalthesaurusbiomasspt_BR
dc.subject.nalthesaurusmicrobiologypt_BR
dc.subject.nalthesaurussoilpt_BR
dc.format.extent234 p.pt_BR
riaa.ainfo.id569604pt_BR
riaa.ainfo.lastupdate2009-10-23pt_BR
Aparece en las colecciones:Série Documentos (CPAC)

Ficheros en este ítem:
Fichero Descripción TamañoFormato 
doc112.pdf892.59 kBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro sencillo del ítem

FacebookTwitterDeliciousLinkedInGoogle BookmarksMySpace