Short-Term Effects of Biochar Amendment on Greenhouse Gas Emissions from Rainfed Agricultural Soils of the Semi–Arid Loess Plateau Region
Abstract
:1. Introduction
2. Materials and Methods
2.1. Site Description
2.2. Experimental Design
2.3. Production and Basic Properties of Biochar
2.4. Soil Sampling and Analysis
2.5. CH4, N2O, and CO2 Emission Monitoring
2.6. Calculation and Statistics
3. Results
3.1. Soil Properties
3.2. Diurnal Dynamics of GHG Flux
3.3. Seasonal Dynamics of GHG Flux
3.4. GHG Flux Correlated with Soil Temperature at Topsoil
3.5. Grain Yield, Total GHG Emissions and GWP
4. Discussion
5. Conclusions
Author Contributions
Acknowledgments
Conflicts of Interest
References
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Treatments | Microbial Biomass Carbon | Soil Organic Carbon | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
0–5 | 5–10 | 10–30 | 0–5 | 5–10 | 10–30 | ||||||
g kg−1 | |||||||||||
T0 | 205 b | 185 a,b | 160 a | 7.44 c | 7.56 b | 6.57 b | |||||
T1 | 262 a | 149 b | 216 a | 10.76 b,c | 8.13 a,b | 6.33 a,b | |||||
T2 | 219 b | 154 b | 187 a | 13.07 b | 9.09 a,b | 7.12 a,b | |||||
T3 | 277 a | 258 a | 239 a | 16.97 a | 11.56 a,b | 7.17 a,b | |||||
T4 | 160 c | 179 a,b | 194 a | 18.86 a | 10.34 a,b | 6.89 a,b | |||||
T5 | 119 c | 159 b | 161 a | 17.16 a | 12.17 a | 7.84 a |
GHG Flux | Soil Layer (cm) | Regression Equation | Coefficient of Determination (R2) |
---|---|---|---|
CH4 flux | 5 | F = 0.006 × Ts − 0.095 | 0.887 * a |
10 | F = 0.016 × Ts − 0.243 | 0.684 * | |
15 | F = 0.021× Ts − 0.325 | 0.714 * | |
N2O flux | 5 | F = 0.081× Ts − 1.128 | 0.723 * |
10 | F = 0.210 × Ts − 3.119 | 0.545 | |
15 | F = 0.246 × Ts − 3.764 | 0.575 | |
CO2 flux | 5 | F = 11.89 × Ts − 118.1 | 0.801 * |
10 | F = 29.34 × Ts − 387.7 | 0.590 | |
15 | F = 39.55 × Ts − 558.5 | 0.497 |
Treatments | CH4–C | N2O–N | CO2–C | Grain Yield | GWP | GHGI |
---|---|---|---|---|---|---|
kg ha−1 | kg CO2-e ha−1 | kg CO2-e t−1 | ||||
T0 | 0.190 ab | 8.69 a | 2627 a | 2476 a | 5222 a | 2.11 a |
T1 | 0.165 ab | 5.48 c | 2647 a | 2495 a | 4284 b | 1.72 b |
T2 | 0.145 b | 5.31 cd | 2580 a | 2577 a | 4164 b | 1.62 b |
T3 | 0.133 b | 4.07 e | 2300 c | 2557 a | 3515 d | 1.37 d |
T4 | 0.076 c | 4.80 d | 2381 b | 2553 a | 3813 c | 1.49 c |
T5 | 0.002 d | 6.13 b | 2436 b | 2551 a | 4263 b | 1.67 b |
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Yeboah, S.; Lamptey, S.; Cai, L.; Song, M. Short-Term Effects of Biochar Amendment on Greenhouse Gas Emissions from Rainfed Agricultural Soils of the Semi–Arid Loess Plateau Region. Agronomy 2018, 8, 74. https://doi.org/10.3390/agronomy8050074
Yeboah S, Lamptey S, Cai L, Song M. Short-Term Effects of Biochar Amendment on Greenhouse Gas Emissions from Rainfed Agricultural Soils of the Semi–Arid Loess Plateau Region. Agronomy. 2018; 8(5):74. https://doi.org/10.3390/agronomy8050074
Chicago/Turabian StyleYeboah, Stephen, Shirley Lamptey, Liqun Cai, and Min Song. 2018. "Short-Term Effects of Biochar Amendment on Greenhouse Gas Emissions from Rainfed Agricultural Soils of the Semi–Arid Loess Plateau Region" Agronomy 8, no. 5: 74. https://doi.org/10.3390/agronomy8050074