Table 4:
Summary of mean season-long, area-scaled methane (CH4) emissions, rice yield, and methane emissions intensity for the various water management/cultivar
treatment combinations and water management practices averaged across cultivars during the 2015 growing season at the Rice Research and Extension Center near Stuttgart, Arkansas.
| Water management/Cultivar combination | Methane emissions (kg CH4-C ha-1 season-1) | Rice yield(Mg ha-1) | Emissions intensity(kg CH4-C Mg grain-1) |
| Mid-season-drain/LaKast | 56.6 | 10.0 | 5.67a† |
| Mid-season-drain/XL753 | 28.9 | 11.5 | 2.52b |
| Mid-season-drain mean | 42.8b† | 10.7 | 3.99 |
| Full-season-flood/LaKast | 76.4 | 10.3 | 7.39a |
| Full-season-flood/XL753 | 79.1 | 12.6 | 6.29a |
| Full-season-flood mean | 77.7a | 11.4 | 6.79 |
†Values in same column followed by different letters are significantly different (P < 0.05); a and b show results of statistical analyses.