<abstract xmlns="http://www.w3.org/1999/xhtml">

Biochars, depending on the types of feedstocks and technological conditions of pyrolysis, can vary significantly in their properties and, therefore, it is difficult to predict biochar-induced effects on nitrous oxide (N2O) emissions from various soils, their physical properties and water availability. The objectives of this study were (1) to quantify effects of slow pyrolysis biochar (BC) and fast pyrolysis biochar (PYRO) on physical and hydro-physical properties of sandy soil (Haplic Arenosol) and clayey loam soil (Gleyic Fluvisol), and (2) to assess corresponding N2O emissions from these two soils. The study included a 63-day long laboratory investigation. Two doses of BC or PYRO (15 t ha−1 and 30 t ha−1) were applied to the soils in combination or without nitrogen fertilizer (NH4NO3, 90 kg N ha−1). The obtained results have shown a significant decrease in the bulk density of sandy soil after it was amended with either rate of BC or PYRO. Water retention capacity of the soils in all the treatments with BC or PYRO increased considerably although no changes was found in the soil water-filled pore space (WFPS) which was higher than 60%. BC was increasing N2O emission rates from the sandy soil treated with N fertilizer, and reducing N2O emission rates from the clayey loam soil treated with N fertilizer. PYRO was more efficient and was reducing N2O emissions from both fertilized soils, but for the sandy soil the reduction was statistically significant only at higher dose (30 t ha−1) of the biochar.
</abstract>

Biochars, depending on the types of feedstocks and technological conditions of pyrolysis, can vary significantly in their properties and, therefore, it is difficult to predict biochar-induced effects on nitrous oxide (N2O) emissions from various soils, their physical properties and water availability. The objectives of this study were (1) to quantify effects of slow pyrolysis biochar (BC) and fast pyrolysis biochar (PYRO) on physical and hydro-physical properties of sandy soil (Haplic Arenosol) and clayey loam soil (Gleyic Fluvisol), and (2) to assess corresponding N2O emissions from these two soils. The study included a 63-day long laboratory investigation. Two doses of BC or PYRO (15 t ha−1 and 30 t ha−1) were applied to the soils in combination or without nitrogen fertilizer (NH4NO3, 90 kg N ha−1). The obtained results have shown a significant decrease in the bulk density of sandy soil after it was amended with either rate of BC or PYRO. Water retention capacity of the soils in all the treatments with BC or PYRO increased considerably although no changes was found in the soil water-filled pore space (WFPS) which was higher than 60%. BC was increasing N2O emission rates from the sandy soil treated with N fertilizer, and reducing N2O emission rates from the clayey loam soil treated with N fertilizer. PYRO was more efficient and was reducing N2O emissions from both fertilized soils, but for the sandy soil the reduction was statistically significant only at higher dose (30 t ha−1) of the biochar.

Effects of slow and fast pyrolysis biochar on N2O emissions and water availability of two soils with high water-filled pore space

Department of Soil Physics, Physical Chemistry and Biophysics

Department of Soil Science, Institute of Agronomic Sciences, Faculty of Agrobiology and Food Resources

Journal of Hydrology and Hydromechanics

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Effects of slow and fast pyrolysis biochar on NO emissions and water availability of two soils with high water-filled pore space

Biochars, depending on the types of feedstocks and technological conditions of pyrolysis, can vary significantly in their properties and, therefore, it is...

Effects of slow and fast pyrolysis biochar on N₂O emissions and water availability of two soils with high water-filled pore space

Published Online: Nov 15, 2021

Page range: 467 - 474

Received: May 31, 2021

Accepted: Aug 04, 2021

DOI: https://doi.org/10.2478/johh-2021-0024

Keywords
Biochar, Sandy soil, Clayey loam soil, Bulk density, Water retention capacity, NO emission

© 2021 Eugene Balashov et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Effects of slow and fast pyrolysis biochar on N2O emissions and water availability of two soils with high water-filled pore space

Published Online: Nov 15, 2021

Page range: 467 - 474

Received: May 31, 2021

Accepted: Aug 04, 2021

DOI: https://doi.org/10.2478/johh-2021-0024

KeywordsBiochar, Sandy soil, Clayey loam soil, Bulk density, Water retention capacity, NO emission

© 2021 Eugene Balashov et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Effects of slow and fast pyrolysis biochar on N₂O emissions and water availability of two soils with high water-filled pore space

Keywords
Biochar, Sandy soil, Clayey loam soil, Bulk density, Water retention capacity, NO emission