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

Citation

Carvalho, MTDM and Madari, BE and Bastiaans, L and van Oort, PAJ and Leal, WGO and de Souza, DM and dos Santos, RC and Matsushige, I and Maia, AHN and Heinemann, AB and Meinke, H, Nitrogen availability, water-filled pore space, and N2O-N fluxes after biochar application and nitrogen fertilization, Pesquisa Agropecuaria Brasileira, 51, (9) pp. 1203-1212. ISSN 0100-204X (2017) [Refereed Article]


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DOI: doi:10.1590/s0100-204x2016000900020

Abstract

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.

Item Details

Item Type:Refereed Article
Keywords:cropping systems, gas fluxes, greenhouse gases, nitrate and ammonium, soil amendment, soil porosity
Research Division:Agricultural and Veterinary Sciences
Research Group:Agriculture, Land and Farm Management
Research Field:Agricultural Land Management
Objective Division:Plant Production and Plant Primary Products
Objective Group:Summer Grains and Oilseeds
Objective Field:Rice
Author:Meinke, H (Professor Holger Meinke)
ID Code:117469
Year Published:2017 (online first 2016)
Deposited By:TIA - Research Institute
Deposited On:2017-06-15
Last Modified:2017-07-24
Downloads:0

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