Nitrous oxide fluxes and their correlations with physical and chemical soil properties

Authors

  • Rubia Santos Corrêa Universidade Federal de Goiás, Escola de Agronomia, Caixa Postal 131, CEP 74001-970 Goiânia, GO.
  • Beáta Emöke Madari Embrapa Arroz e Feijão, Rodovia GO-462, Km12, Caixa Postal 179, CEP 75375-000 Santo Antônio de Goiás, GO.
  • Glaucilene Duarte Carvalho Secretaria de Meio Ambiente e Recursos Hídricos, 11a Avenida, no 1.272, Setor Leste Universitário, CEP 74605-060 Goiânia, GO.
  • Adriana Rodolfo Costa Universidade Estadual de Goiás, Campus Santa Helena de Goiás, Via Protestato Joaquim Bueno, no 945, Vila Santa Helena, CEP 75920-000 Santa Helena, GO.
  • Ana Cláudia Castro Pereira Universidade Federal de Goiás, Escola de Agronomia, Caixa Postal 131, CEP 74001-970 Goiânia, GO.
  • João Carlos Medeiros Universidade Federal do Piauí, Campus Professora Cinobelina Elvas, Estrada Municipal Bom Jesus-Viana, Planalto Horizonte, CEP 64900-000 Bom Jesus, PI.

DOI:

https://doi.org/10.1590/S1678-3921.pab2016.v51.22511

Keywords:

Urochloa, denitrification, water-filled pore space, greenhouse gas, nitrification.

Abstract

The objective of this work was to evaluate the dynamics of nitrous oxide (N2O) fluxes in a soil under pasture, in an integrated crop-livestock system, and in native cerrado as a reference, besides identifying the physical and chemical soil properties that affect the fluxes. The study was conducted at Fazenda Capivara of Embrapa Arroz e Feijão, in the state of Goiás, Brazil, between February 5 and September 30, 2013. Gas sampling was performed using manual static chambers. The soil under pasture showed the highest N2O fluxes with average of 14.12 ng m-2 s-1. This area also showed greater water-filled pore space (WFPS), which, associated with soil temperature and nitrate content in the soil affected the production of N2O. In the rainy season, fluxes showed positive correlation with soil WFPS, and, in the dry season, they were correlated with soil contents of ammonium and nitrate. The total N2O emission in the pasture area was 1,644.19 g ha-1. In native cerrado, there was no soil-N2O emission to the atmosphere.

Author Biographies

Rubia Santos Corrêa, Universidade Federal de Goiás, Escola de Agronomia, Caixa Postal 131, CEP 74001-970 Goiânia, GO.

http://lattes.cnpq.br/9929973883135413

Beáta Emöke Madari, Embrapa Arroz e Feijão, Rodovia GO-462, Km12, Caixa Postal 179, CEP 75375-000 Santo Antônio de Goiás, GO.

http://lattes.cnpq.br/0302689027695014

Glaucilene Duarte Carvalho, Secretaria de Meio Ambiente e Recursos Hídricos, 11a Avenida, no 1.272, Setor Leste Universitário, CEP 74605-060 Goiânia, GO.

http://lattes.cnpq.br/3302860294273346

Adriana Rodolfo Costa, Universidade Estadual de Goiás, Campus Santa Helena de Goiás, Via Protestato Joaquim Bueno, no 945, Vila Santa Helena, CEP 75920-000 Santa Helena, GO.

http://lattes.cnpq.br/8142254771826531

Ana Cláudia Castro Pereira, Universidade Federal de Goiás, Escola de Agronomia, Caixa Postal 131, CEP 74001-970 Goiânia, GO.

http://lattes.cnpq.br/3389123954503597

João Carlos Medeiros, Universidade Federal do Piauí, Campus Professora Cinobelina Elvas, Estrada Municipal Bom Jesus-Viana, Planalto Horizonte, CEP 64900-000 Bom Jesus, PI.

http://lattes.cnpq.br/3509111034386583

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Published

2016-10-17

How to Cite

Corrêa, R. S., Madari, B. E., Carvalho, G. D., Costa, A. R., Pereira, A. C. C., & Medeiros, J. C. (2016). Nitrous oxide fluxes and their correlations with physical and chemical soil properties. Pesquisa Agropecuaria Brasileira, 51(9), 1148–1155. https://doi.org/10.1590/S1678-3921.pab2016.v51.22511

Issue

v.51, n.9, set. 2016: Número Temático O solo como fator de integração entre os componentes ambientais e a produção agropecuária

Section

SOLO E AMBIENTE (TEMÁTICO)