Nitrogen availability, water-filled pore space, and N2O-N fluxes after biochar application and nitrogen fertilization.
2016
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. | 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.
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.
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
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تم تزويد هذا السجل من قبل Empresa Brasileira de Pesquisa Agropecuária