Are greenhouse gas fluxes lower from ley or perennial fallow than from arable organic soils? A systematic review protocol

作者：Alena Holzknecht, Örjan Berglund, Magnus Land, Jacynthe Dessureault‐Rompré, Lars Elsgaard, Kristiina Lång · 发表于：Environmental Evidence · 年份：2023 · DOI：10.1186/s13750-023-00310-5 · 被引用次数：5 · 研究领域：Peatlands and Wetlands Ecology、Fire effects on ecosystems、Coastal wetland ecosystem dynamics

Abstract Background Cultivated peatlands are widespread in temperate and boreal climate zones. For example, in Europe about 15% of the pristine peatland area have been lost through drainage for agricultural use. When drained, these organic soils are a significant source of greenhouse gas (GHG) emissions. To reach climate goals, the agricultural sector must reduce its GHG emissions, and one measure that has been discussed is changing land use from cropland to ley production or perennial green fallow. This management change leads to lower reported emissions, at least when using the IPCC default emission factors (EF) for croplands and grasslands on organic soils (IPCC 2014). However, there was a limited background dataset available for developing the EFs, and other variables than management affect the comparison of the land use options when the data originates from varying sites and years. Thus, the implications for future policies remain uncertain. This protocol describes the methodology to conduct a systematic review to answer the question of whether ley production or perennial green fallow can be suggested as a valid alternative to annual cropping to decrease GHG emissions on organic soils in temperate and boreal climate. Methods Publications will be searched in different databases and bibliographies of relevant review articles. The comprehensiveness of the search will be tested through a list of benchmark articles identified by the protocol development team. The screening wi...