Cultivation of maize for biomethane production has expanded rapidly, including on drained peat soils. The resulting soil CO₂ emissions at the point of feedstock production are largely overlooked when assessing biogas climate mitigation potential. On the basis of field-scale flux measurements, we calculate that soil CO₂ emissions from biomethane feedstock production on drained peat exceed embodied emissions for an equivalent amount of natural gas by up to a factor of three.

中文翻译：

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用泥炭种植的玉米生产的生物甲烷排放的二氧化碳比天然气还多

用于生产生物甲烷的玉米种植迅速扩大，包括在排水泥炭土上的种植。在评估沼气缓解气候变化的潜力时，原料生产时产生的土壤CO ₂排放在很大程度上被忽视。根据现场规模的通量测量，我们计算出在排水泥炭上生产生物甲烷原料所产生的土壤CO ₂排放量超过等量天然气的具体排放量达三倍。