Estoques de carbono e nitrogênio no solo na seqÃ¼ência floresta-pastagem na região oeste da bacia amazônica brasileira

Jener Fernando Leite de Moraes; Christopher Neil; Boris Volkoff; Carlos Clemente Cerri; Jerry Melillo; Valmique Costa Lima; Paul A. Steudler

doi:10.4025/actasciagron.v24i0.2383

Soil carbon and nitrogen stocks following forest conversion to pasture in the Western Brazilian Amazon Basin

Authors

Jener Fernando Leite de Moraes IAC Author
Christopher Neil Marine Biological Laboratory Woods Hole - USA Author
Boris Volkoff IRD Author
Carlos Clemente Cerri USP Author
Jerry Melillo Marine Biological Laboratory Woods Hole - USA Author
Valmique Costa Lima UFPR Author
Paul A. Steudler Marine Biological Laboratory Woods Hole - USA Author

DOI:

https://doi.org/10.4025/actasciagron.v24i0.2383

Keywords:

Amazônia, matéria orgânica, floresta tropical, pastagem

Abstract

We examined two chronosequences of forest, 8-and 20-year-old pasture in Rondônia-Brazil, to investigate how land use change affects the soil carbon and nitrogen stocks and organic matter dynamics of surface soil (0 to 30 cm). Soil total carbon and nitrogen stocks increased in 20-year-old pasture compared with the original forest in one chronosequence but no changes were detected in the other chronosequence. Calculations of the contributions of forest - and pasture-derived carbon from soil ð¹³C values showed a general pattern of pasture carbon augmenting a slowly declining pool of carbon derived from the original forest. Soil ð¹³C values at 0 to 10 cm increased from -27 to -28 o/oo in the forests to approximately -20 o/oo in the 20-year-old pastures and reflected greater inputs of pasture-derived C4 carbon in older pastures. If typical of larger areas of pasture in the Amazon Basin, these changes in soil carbon and nitrogen stocks following forest conversion to pasture have important implications for understanding the global biogeochemical cycles

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Author Biography

Jener Fernando Leite de Moraes, IAC

Possui graduação em Engenharia Agronômica pela Universidade Estadual Paulista Julio de Mesquita - UNESP (1988), mestrado e Doutorado em Ciências, pelo Centro de Energia Nuclear na Agricultura, CENA/USP (1995). Atualmente é Pesquisador Científico do Instituto Agronômico e professor do curso de Mestrado em Agricultura Tropical e Sub-tropical, do mesmo Instituto, onde é responsável pela disciplina de Geoprocessamento e Planejamento Agroambiental. Realizou cursos de aperfeiçoamento em banco de dados e sensoriamento remoto na França e Estados Unidos. Tem experiência na área de Geoprocessamento, com ênfase em Diagnóstico do Meio Fisico e Planejamento Agroambiental de bacias hidrográficas, atuando principalmente nos seguintes temas: agricultura e meio ambiente, zoneamentos, sensoriamento remoto Currículo Lattes

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Published

2008-04-30

Issue

Vol. 24 (2002)

Section

Agronomy

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I Declare that current article is original and has not been submitted for publication, in part or in whole, to any other national or international journal.

The copyrights belong exclusively to the authors. Published content is licensed under Creative Commons Attribution 4.0 (CC BY 4.0) guidelines, which allows sharing (copy and distribution of the material in any medium or format) and adaptation (remix, transform, and build upon the material) for any purpose, even commercially, under the terms of attribution.

How to Cite

Moraes, J. F. L. de, Neil, C., Volkoff, B., Cerri, C. C., Melillo, J., Lima, V. C., & Steudler, P. A. (2008). Soil carbon and nitrogen stocks following forest conversion to pasture in the Western Brazilian Amazon Basin. Acta Scientiarum. Agronomy, 24, 1369-1376. https://doi.org/10.4025/actasciagron.v24i0.2383