Município de Canguçu, RS : o relevo e sua morfodinâmica como condicionantes do dinamismo agrícola

AUTOR(ES)

Valmir Viera

FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

2012

RESUMO

The study of relief and its relation with the soils occurring in the municipality of Canguçu, Rio Grande do Sul, aims at doing a detailed and comparative analysis of those natural components that condition the rising or reduction of the potentialities or limitations to the use of soil for the development of systems of cultivation and livestock rearing. In order to carry out this research satellite images Quickbird (2008), fieldwork and laboratory tests were employed. Using the Programm ArcGis with data Aster GDEM ¿ Global Digital Elevation Model ¿ which served to delimitate the lithological and geomorphological compartments associated to the types of soil, the mapping of the area resulted in the 1:50.000 scale map. So, in spite of the fact that previous mappings identified only one geomorphological compartment (Plateau) in this municipality, it may be subdivided into ridge relief and hill relief. It is possible to verify the occurrence of Neosols associated to rocky outcrops and to ridge relief; Cambisols and Argisols located in the hill relief area; and Gleysols in the plains near the drainage system. In this sense, in the results it was found that the soils located in ridge relief support chiefly the farming systems of tobacco, bean and maize, which suffer hard restrictions due to declivity, to the low depth of the soil as well as to its low level of fertility. In this same compartment it was found the rearing of dairy cattle. On the other hand, the soils located in the areas of hill relief support mainly the farming of maize, soya, bean and citrus, as well as the rearing of beef and dairy cattle. As to the Gleysol, which appears in the alluvial plain of the Camaquã River, it supports rice culture and the rearing system of beef and dairy cattle.

ASSUNTO(S)

geomorfologia geomorphology desenvolvimento agrícola soil culture systems canguçu (rs) rearing systems agricultural development

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