02365nab a2200301 i 4500003000900000005001700009008004100026040001800067072000800085072000800093100003500101100003800136100002900174100003800203100003400241100003900275245010900314500006100423520119800484650001901682650002601701650002201727650002501749773018301774856007901957942000802036999001902044BR-BrBNA20250512191409.0250512b2020    bl.mr|pooa||| 00| 0 eng |  aBR-BrBNAbeng  aP34  aP33  aMelo, Wanderley José de Melo  aMelo, Gabriel Mauricio Peruca de   aMelo, Valeria Peruca de   aAraujo, Ademir Sérgio Ferreira   aFerraudo, Antônio Sérgio   aBertipaglia, Liandra Maria Abaker   aSoil microbial biomass and enzyme activity in six Brazilian oxisols under cropland and native vegetation  aPublicação on-line; 30 ref.; 5 tables; Sumaries (En)  a

ABSTRACT: Oxisols are important soils that have been converted from native vegetation to croplands, and can affect soil biological properties such as microbial biomass and enzyme activity. Thus, the aim of this study was to evaluate the changes on soil microbial biomass and enzyme activity when native vegetation (NV) was converted to cropland (CL), such as maize or sugarcane in six oxisols from São Paulo state, Brazil. Soil microbial biomass C (MBC) and N (MBN), and the activity of arylsulphatase, dehydrogenase and fluorescein diacetate hydrolysis (FDA) were assessed in samples collected at 0-0.20 m. In general, MBC was higher under NV than CL (about + 40%), while MBN and FDA did not show a consistent pattern between NV and CL. All soils showed higher values of arylsulfatase (increased from 101 to 717%) and dehydrogenase (increased 15 to 220%) under NV than CL. In conclusion, soil microbial biomass C is usually higher under native vegetation than cropland. Arylsulphatase and dehydrogenase were the attributes that presented better differentiation between native and cropped soils.

Key words: dehydrogenase, arylsulphatase, fluorescein diacetate hydrolysis, soil management.  aMANEJO DO SOLO  aMICROBIOLOGIA DO SOLO  aANÁLISE DO SOLO  aVEGETAÇÃO NATIVA0 013659344638dCampinas-SP Instituto Agronômico - Coordenadoria da Pesquisa Agropecuária 1941o2024-4960tBragantia (Brazil)x0006-8705gv. 49 p. 498-504; (2020)wBR2025001057  uhttps://www.scielo.br/j/brag/a/5Y97xm8WRbQYQPYGpLrtScL/?format=pdf&lang=en  cANA  c331441d331441