Winter oilseed rape is traditionally established via plough-based soil cultivation and conventional sowing methods. Whilst there is potential to adopt lower cost, and less intensive establishment systems, the impact of these on greenhouse gas emissions have not been evaluated. To address this, field experiments were conducted in 2014/2015 and 2015/2016 to investigate the effects of 1) crop establishment method and 2) sowing method on soil greenhouse gas emissions from a winter oilseed rape crop grown in Ireland. Soil carbon dioxide, nitrous oxide and methane emission measurements were carried out using the static chamber method. Yield (t seed ha⁻¹) and the yield-scaled global warming potential (kg CO₂-eq. kg⁻¹ seed) were also determined for each management practice. During crop establishment, conventional tillage induced an initially rapid loss of carbon dioxide (2.34 g C m⁻² hr⁻¹) compared to strip tillage (0.94 g C m⁻² hr⁻¹) or minimum tillage (0.16 g C m⁻² hr⁻¹) (p < 0.05), although this decreased to background values within a few hours. In the crop establishment trial, the cumulative greenhouse gas emissions were, apart from methane, unaffected by tillage management when sown at a conventional (125 mm) or wide (600 mm) row spacing. In the sowing method trial, cumulative carbon dioxide emissions were also 21% higher when plants were sown at 10 seeds m⁻² compared to 60 seeds m⁻² (p < 0.05). Row spacing width (125 and 750 mm) and variety (conventional and semi-dwarf) were found to have little effect on greenhouse gas emissions and differences in seed yield between the sowing treatments were small. Overall, management practices had no consistent effect on soil greenhouse gas emissions and modifications in seed yield per plant countered differences in planting density.

冬季油菜传统上是通过基于犁的土壤栽培和常规播种方法建立的。虽然有可能采用成本较低、密集度较低的建立系统，但尚未评估这些系统对温室气体排放的影响。为了解决这个问题，在 2014/2015 和 2015/2016 年进行了田间试验，以研究 1) 作物种植方法和 2) 播种方法对爱尔兰种植的冬季油菜作物土壤温室气体排放的影响。土壤二氧化碳、一氧化二氮和甲烷排放测量使用静态室法进行。产量（t 种子公顷^-1）和产量衡量的全球变暖潜势（kg CO ₂ -eq. kg ^-1种子）也为每个管理实践确定。在作物建立期间，与条耕（0.94 g C m ^-2  hr ^-1）或最少耕作（0.16 g C m ^-2）相比，常规耕作导致二氧化碳的初始快速损失（2.34 g C m ^-2  hr ^-1） 小时^-1 ) (磷< 0.05），尽管这会在几小时内降低到背景值。在作物种植试验中，除甲烷外，当以常规（125 毫米）或宽（600 毫米）行距播种时，累积温室气体排放不受耕作管理的影响。在播种方法试验中，当植物以 10 粒 m ^-2种子播种时，累积二氧化碳排放量也比 60 粒种子 m ^-2高 21% （磷< 0.05)。发现行距宽度（125 和 750 毫米）和品种（常规和半矮化）对温室气体排放的影响很小，播种处理之间的种子产量差异很小。总体而言，管理实践对土壤温室气体排放没有一致的影响，每株植物种子产量的改变抵消了种植密度的差异。