Nitrogen availability, water-filled pore space, and N2O-N fluxes after biochar application and nitrogen fertilization.

The objective of this work was to investigate the impact of the application of wood biochar, combined with N fertilizations, on N2O-N fluxes, nitrogen availability, and water-filled pore space (WFPS) of a clayey Oxisol under rice (wet season) and common bean (dry season) succession. Manual static chambers were used to quantify N2O-N fluxes from soil immediately after a single application of wood biochar (32 Mg ha-1) and after four crop seasons with N applications (90 kg ha-1 N). Soil ammonium (N-NH4 +) and nitrate (N-NO3-) availability, as well as WFPS, was measured together with N2O-N fluxes. There was no interaction between biochar and N fertilization regarding N2O-N fluxes in any of the four seasons monitored, although these fluxes were clearly enhanced by N applications. At 1.5 and 2.5 years after biochar application, the WFPS decreased. In addition, in the seasons characterized by low WFPS, N2O-N fluxes and soil N-NO3 - and N-NH4 + availability were enhanced after N applications. Long-term experiments in the field are important to quantify the impacts of biochar on N2O-N fluxes and to determine the dynamics of these fluxes on soil-related variables.

Bibliographic Details

Main Authors:	CARVALHO, M. T. de M., MADARI, B. E., BASTIAANS, L., VAN OORT, P. A. J., LEAL, W. G. de O., SOUZA, D. M. de, SANTOS, R. C. dos, MATSUSHIGE, I., MAIA, A. de H. N., HEINEMANN, A. B., MEINKE, H.
Other Authors:	MARCIA THAIS DE MELO CARVALHO, CNPAF; BEATA EMOKE MADARI, CNPAF; LAMMERT BASTIAANS, WAGENINGEN UNIVERSITY; PEPIJN ADRIANUS JOHANNES VAN OORT, AFRICARICE BENIN STATION; WESLEY GABRIEL DE OLIVEIRA LEAL, CNPAF; DIEGO MENDES DE SOUZA, CNPAF; ROBERTO CARLOS GOMES DOS SANTOS, CNPAF; IVA MATSUSHIGE, CNPAF; ALINE DE HOLANDA NUNES MAIA, CNPMA; ALEXANDRE BRYAN HEINEMANN, CNPAF; HOLGER MEINKE, UNIVERSITY OF TASMANIA.
Format:	Artigo de periódico biblioteca
Language:	English eng
Published:	2016-11-18
Subjects:	Gas efeito estufa, Fluxo de gases, Nitrogênio, Solo, Porosidade, Sistema de cultivo, Condicionador do solo, Nitrato, Amonia,
Online Access:	http://www.alice.cnptia.embrapa.br/alice/handle/doc/1056600
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