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Will Biochar Suppress or Stimulate Greenhouse Gas Emissions in Agricultural Fields? Unveiling the Dice Game through Data Syntheses.
- Source :
- Soil Systems; Dec2022, Vol. 6 Issue 4, p73, 11p
- Publication Year :
- 2022
-
Abstract
- With the increasing popularity of biochar as a soil amendment worldwide in recent years, a question of concern arises as to whether the application of biochar would suppress or stimulate greenhouse gas (GHG) emissions. In this study, published data extracted from independent individual studies were systematically selected, statistically processed, graphically presented and critically analyzed to understand biochar's influences on the emissions of CO<subscript>2</subscript>, CH<subscript>4</subscript> and N<subscript>2</subscript>O—the three major GHGs emitted in agricultural fields. The results revealed not only the significant importance of biochar's pyrolysis temperature for its impacts on GHG emissions, but also the dissimilar influences on the generations of different GHGs. The application of biochar, in general, stimulated the emissions of CO<subscript>2</subscript> and CH<subscript>4</subscript> to various extents. With biochar pyrolyzed under relatively lower temperatures (e.g., <500 °C), higher application rates generally resulted in more stimulated CO<subscript>2</subscript> and CH<subscript>4</subscript> emissions; whereas those pyrolyzed under relatively higher temperatures (e.g., >550 °C) became less stimulative (and sometimes even suppressive) for CO<subscript>2</subscript> and CH<subscript>4</subscript> emissions, especially when applied at higher rates. Nevertheless, the response of N<subscript>2</subscript>O emission to biochar application contrasted with those of CO<subscript>2</subscript> and CH<subscript>4</subscript>. The results may contribute to better regulations for biochar application in combating GHG emissions in agriculture. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 25718789
- Volume :
- 6
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- Soil Systems
- Publication Type :
- Academic Journal
- Accession number :
- 161005805
- Full Text :
- https://doi.org/10.3390/soilsystems6040073