Table 1.
Effects of simulated erosion on cumulative greenhouse gas (GHG) emissions, global warming potential (GWP), greenhouse gas intensity (GHGI) under two fertilizer application during a growing season.
| Treatment | CO2–C (Mg ha−1) | N2O–N (kg ha−1) | CH4–C (kg ha−1) | GWP | GHGI |
|---|---|---|---|---|---|
| N-fertilizer | |||||
| Topsoil removal | 5.11 ± 0.03a | 2.73 ± 0.09b | −0.92 ± 0.00b | 20.04 | 5.12 |
| Undisturbed control | 4.30 ± 0.06b | 3.38 ± 0.01a | −1.78 ± 0.01a | 17.36 | 2.40 |
| Topsoil addition | 1.44 ± 0.02c | 1.95 ± 0.01c | −0.58 ± 0.04c | 6.21 | 0.69 |
| Organic manure | |||||
| Topsoil removal | 3.98 ± 0.01 | 3.41 ± 0.01a | 0.57 ± 0.13a | 16.27 | 4.98 |
| Undisturbed control | 4.80 ± 0.42 | 2.94 ± 0.00b | −0.77 ± 0.13b | 19.01 | 2.48 |
| Topsoil addition | 3.72 ± 0.04 | 2.98 ± 0.00b | −1.24 ± 0.18b | 15.06 | 1.16 |
Values are given as mean ± s.e.m. (n = 3). Values in each column followed by different letters are statistically different at p ≤ 0.05.
GWP (Mg CO2 Eq ha−1 growing season−1) = CH4 × 21 + N2O × 310 + CO2
GHGI (Mg CO2 Eq Mg grain yield growing season−1) = GWP/grain yield