Influence of Biochars on Nitrous Oxide Emission and Nitrogen Leaching from Two Contrasting Soils
Top Cited Papers
- 1 July 2010
- journal article
- special submission
- Published by Wiley in Journal of Environmental Quality
- Vol. 39 (4), 1224-1235
- https://doi.org/10.2134/jeq2009.0138
Abstract
The influence of biochar on nitrogen (N) transformation processes in soil is not fully understood. This study assessed the influence of four biochars (wood and poultry manure biochars synthesized at 400°C, nonactivated, and at 550°C, activated, abbreviated as: W400, PM400, W550, PM550, respectively) on nitrous oxide (N2O) emission and N leaching from an Alfisol and a Vertisol. Repacked soil columns were subjected to three wetting–drying (W–D) cycles to achieve a range of water-filled pore space (WFPS) over a 5-mo period. During the first two W–D cycles, W400 and W550 had inconsistent effects on N2O emissions and the soils amended with PM400 produced higher N2O emissions relative to the control. The initially greater N2O emission from the PM400 soils was ascribed to its higher labile intrinsic N content than the other biochars. During the third W–D cycle, all biochar treatments consistently decreased N2O emissions, cumulatively by 14 to 73% from the Alfisol and by 23 to 52% from the Vertisol, relative to their controls. In the first leaching event, higher nitrate leaching occurred from the PM400-amended soils compared with the other treatments. In the second event, the leaching of ammonium was reduced by 55 to 93% from the W550- and PM550-Alfisol and Vertisol, and by 87 to 94% from the W400- and PM400-Vertisol only (cf. control). We propose that the increased effectiveness of biochars in reducing N2O emissions and ammonium leaching over time was due to increased sorption capacity of biochars through oxidative reactions on the biochar surfaces with ageing.Keywords
Funding Information
- NSW Department of Environment, Climate Change and Water
This publication has 41 references indexed in Scilit:
- Black carbon decomposition and incorporation into soil microbial biomass estimated by 14C labelingSoil Biology and Biochemistry, 2008
- Using poultry litter biochars as soil amendmentsSoil Research, 2008
- A handful of carbonNature, 2007
- Effects of charcoal addition on N2O emissions from soil resulting from rewetting air-dried soil in short-term laboratory experimentsSoil Science and Plant Nutrition, 2007
- Black Carbon Increases Cation Exchange Capacity in SoilsSoil Science Society of America Journal, 2006
- Temperature and source material influence ecological attributes of ponderosa pine and Douglas-fir charcoalForest Ecology and Management, 2006
- Nitrous oxide emission from Australian agricultural lands and mitigation options: a reviewSoil Research, 2003
- The influence of soil pH on denitrification: progress towards the understanding of this interaction over the last 50 yearsEuropean Journal of Soil Science, 2002
- Layer charge characteristics of smectites from Vertosols (Vertisols) of New South WalesSoil Research, 2002
- A physiological method for the quantitative measurement of microbial biomass in soilsSoil Biology and Biochemistry, 1978