The use of carbon isotopes in charcoals and humin in the soils: an indispensable tool to evaluate systematically the velocity of biological turnover and of paleoclimatic events

• Grant number: 95/05047-5
• Support Opportunities: Regular Research Grants
• Start date: March 01, 1996
• End date: August 31, 1998
• Field of knowledge: Physical Sciences and Mathematics - Geosciences - Geology
• Principal Investigator: Luiz Carlos Ruiz Pessenda
• Grantee: Luiz Carlos Ruiz Pessenda
• Host Institution: Centro de Energia Nuclear na Agricultura (CENA). Universidade de São Paulo (USP). Piracicaba , SP, Brazil

Abstract

Using the carbon isotopes (12C, 13C, 14C) of the organic matter of latosols from different locations in the State of São Paulo, it is intended to evaluate the existing correlation between the ages of the charcoals and the ages of the humin as an indicator of the biological turnover in soils devoid of charcoals. Simultaneously it is intended to carry out paleoclimatic studies and establish a database of carbon isotopes in soils in the State of São Paulo. (AU)