Estimating Soil Carbon Stocks and it Sensibility to Mineralization in Spodic Deep horizons in Podzol located at High Rio Negro Basin

• Grant number: 12/18092-6
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: December 01, 2012
• End date: August 31, 2015
• Field of knowledge: Physical Sciences and Mathematics - Geosciences
• Principal Investigator: Célia Regina Montes
• Grantee: Roberta Clemente Santin
• Host Institution: Centro de Energia Nuclear na Agricultura (CENA). Universidade de São Paulo (USP). Piracicaba , SP, Brazil

Abstract

Stocked carbon quantification in environmental as well its sensibility to climate changes or land use represents a research line in expansion. Amazon has a huge area as Podzol. This soil is characterized as thick sandy horizons overlying of clay horizons. Organic matter (OM) produced in surface is transferred through sandy horizon by percolated water. This material is cumulated in a depth ranging 1 to 3 meters between sandy and clay horizons resulting in a Podzol horizon (Bh horizon). Podzol can stock over 13.6 Pg of C in depths of the Bh horizons according to recent studies in the Amazon. The dryness of soils typically saturated could result in mineralization of partial or total OM in Bh horizon and consequently it results in large quantity of greenhouse-gas emission. This study will estimate C stock, CO2 emissions and vulnerability of Podzol in forest over different land uses and climate scenarios. To reach the goals will be require: (i) determine of C concentration in Podzol, (ii) quantify C mineralization through of microorganism ability to metabolize organic matter of soil; (iii) determine isotopic composition d13C in soil samples. Moreover, this study will evaluate potential of fluorescence spectroscopy to analyse organic matter properties in order to develop a less hard-working and lower cost alternative method for organic matter characterization.

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

MONTES, CELIA R.; MERDY, PATRICIA; DA SILVA, WILSON T. L.; ISHIDA, DEBORA; MELFI, ADOPHO J.; SANTIN, ROBERTA C.; LUCAS, YVES. Mineralization of soil organic matter from equatorial giant podzols submitted to drier pedoclimate: A drainage topochronosequence study. CATENA, v. 222, p. 10-pg., 2022-12-08. (12/51469-6, 11/03250-2, 12/18092-6)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

SANTIN, Roberta Clemente. Evaluation of sensibility to mineralization and detailed study of organic matter in Spodosols of the upper basin of the Rio Negro, Amazonas. 2017. Doctoral Thesis - Universidade de São Paulo (USP). Centro de Energia Nuclear na Agricultura (CENA/STB) Piracicaba.