Projects per year
Abstract
A previously published meta-analysis of biochar impacts on soil N2O emissions by Cayuela et al. (2014) found a “grand mean” reduction in N2O emissions of 54 ± 6% following biochar application to soil. Here we update this analysis to include 26 additional manuscripts bringing the total to 56 articles. The updated meta-analysis confirms that biochar reduces soil N2O emissions by 49 ± 5% (mean ± 95% confidence interval). Importantly, this meta-analysis has sufficient data to investigate the impact of biochar under field conditions, showing a statistically significant lower average reduction in the field (28 ± 16%) compared to controlled laboratory studies (54 ± 3%). A key finding is the importance of the molar H:Corg ratio of biochar in determining mitigation of N2O. Biochars with a molar H:Corg ratio 0.5 were less effective at 40 ± 16%. Together with previously published information, our new results suggest that a key mitigation mechanism is linked to the degree of polymerization and aromaticity of biochar.
Original language | English |
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Pages (from-to) | 135-138 |
Journal | Agriculture, Ecosystems and Environment |
Volume | 202 |
DOIs | |
Publication status | Published - 2015 |
Keywords
- greenhouse-gas emissions
- rice
- impact
- straw
- co2
- carbon
- china
- paddy
- plant
- denitrification
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Dive into the research topics of 'The molar H: Corg ratio of biochar is a key factor in mitigating N2O emissions from soil'. Together they form a unique fingerprint.Projects
- 1 Finished
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FERTIPLUS: FERTIPLUS Reducing mineral fertilisers and agro-chemicals by recycling treated organic waste as compost and bio-char products
1/12/11 → 30/11/15
Project: EU research project