Effect of the use of land on the dynamic of carbon and nitrogen in the soil in the region of Ariquemes, Rondônia (RO): use of a geographical computerized system

• Grant number: 92/00636-4
• Support Opportunities: Regular Research Grants
• Start date: May 01, 1992
• End date: April 30, 1994
• Field of knowledge: Agronomical Sciences - Agronomy - Soil Science
• Principal Investigator: Carlos Clemente Cerri
• Grantee: Carlos Clemente Cerri
• Host Institution: Centro de Energia Nuclear na Agricultura (CENA). Universidade de São Paulo (USP). Piracicaba , SP, Brazil

Abstract

Alterations in land use have caused changes in the dynamic of carbon and nitrogen in the soil. Recent studies onorganic matter in the soil in pastures in Manaus, MA, indicate that the levels of C can increase after an initial decline (CHONÉ et al., 1987). Also the rate of cycling of N is significantly modified by the elimination of the natural vegetation. Understanding of the complexity of these processes and their interrelation with the properties of the soil, vegetation, relief and climate, require the use of techniques which enable the manipulation of a large array of information, which today is possible with geoprocessing. The objective of this work is to study the relationships between the changes in land use in a tropical ecosystem and its consequences in the dynamic of C and N, under conditions of native forest and pasture, in the region of Ariquemes (RO). A geographical information system will be developed integrating field data, digitalized maps of the soil, relief, drainage and information from remote sensoring. (AU)