Open Access
Table 1
Greenhouse gas (GHG) emissions of oilseed rape and of biodiesel, seed yields and nitrogen applications from 2012/2013 to 2016/2017 (± confidence intervals at 5%).
| 2012/2013 | 2013/2014 | 2014/2015 | 2015/2016 | 2016/2017 | |
|---|---|---|---|---|---|
| Number of cooperatives or companies | 73 | 70 | 74 | 48 | 39 |
| Oilseed rape area* (ha) | 209 720 | 283 480 | 242 360 | 96 570 | 90 170 |
| GHG of oilseed rape (g CO2 MJ−1) | 33.7 ± 1.3 | 28.7 ± 0.7 | 29.5 ± 0.8 | 33.0 ± 1.1 | 28.4 ± 0.8 |
| GHG of biodiesel (g CO2 MJ−1) | 42.3 ± 1.3 | 37.3 ± 0.7 | 38.1 ± 0.8 | 41.6 ± 1.1 | 37.0 ± 0.8 |
| Seed yield (t ha−1) | 3.39 ± 0.11 | 3.87 ± 0.9 | 3.76 ± 0.10 | 3.42 ± 0.09 | 4.03 ± 0.14 |
| Mineral nitrogen application (kg N ha−1) | 161.8 ± 7.5 | 155.9 ± 6.9 | 157.1 ± 7.7 | 165.3 ± 7.1 | 163.1 ± 6.5 |
| Organic nitrogen application (kg N ha−1) | 36.3 ± 7.8 | 38.2 ± 8.5 | 40.4 ± 9.4 | 38.3 ± 9.7 | 39.1 ± 10.9 |
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