Résumé
Abstract The sugarcane in Brazil is passing through a management transition that is leading to the abolition of pre-harvest burning. Without burning, large amounts of sugarcane trash is generated, and there is a discussion regarding the utilization of this biomass in the industry versus keeping it in the field to improve soil quality. To study the effects of the trash removal on soil quality, we established an experimental sugarcane plantation with different levels of trash over the soil (0%, 50% and 100% of the original trash deposition) and analyzed the structure of the bacterial and fungal community as the bioindicators of impacts. The soil DNA was extracted, and the microbial community was screened by denaturing gradient gel electrophoresis in two different seasons. Our results suggest that there are no effects from the different levels of trash on the soil chemistry and soil bacterial community. However, the fungal community was significantly impacted, and after twelve months, the community presented different structures among the treatments.
Sujets)
Microbiologie du sol , Bactéries/isolement et purification , Saccharum/microbiologie , Champignons/isolement et purification , Saisons , Sol/composition chimique , Bactéries/classification , Bactéries/génétique , Brésil , Saccharum/croissance et développement , Biodiversité , Champignons/classification , Champignons/génétiqueRésumé
O presente trabalho consiste numa revisao e no relato de um caso da sindrome de Munchausen ou doenca artificial cronica com sintomas fisicos. O autor da enfase as graves consequencias advindas ao paciente quando nao ocorre o diagnostico no inicio do quadro