Examining the impacts of agricultural drainage on carbon cycling of northern peatlands

北方泥炭地储存了全球约30%的土壤碳（C），易受气候和土地利用变化的影响。这些土地已经并仍在通过排水变成农业和林业用地。土地使用变化和其他人为干扰可能与气候变化的直接影响一样大，甚至更大，是全球碳循环中的关键不确定因素。这些排水泥炭地，从原始泥炭地不同的水文和植被组成，功能相对于C循环？迫切需要研究这些变化，因为自2012年以来的排水影响必须在国家温室气体清单中加以说明，因此将成为未来土地管理的一部分。然而，泥炭地碳循环模型不能模拟排水，因为它们只是参数化模拟自然条件下的碳循环。包括排水泥炭地生态系统C模型需要更好地了解排水泥炭地的水文，生态和地球化学过程，并将这种理解纳入模拟模型。

Northern peatlands, storing about 30% of global soil carbon (C), are susceptible to climate and land-use change. They have been, and are still being, converted into agricultural and forestry lands through drainage. Land-use change and other human disturbances, which can be as large as, or larger than, the direct effect of climate change, are key uncertainties in the global C cycle. How do these drained peatlands, with different hydrology and vegetation composition from pristine peatlands, function with respect to C cycling? There is an urgent need to study these changes because the effects of drainage since 2012 have to be accounted for in national greenhouse gas inventories and therefore will become part of land management in the future. However, the peatland C cycling models cannot simulate drainage as they are only parameterized to simulate C cycling under natural conditions. To include drainage in the peatland ecosystem C models requires a greater understanding of the hydrological, ecological and biogeochemical processes of the drained peatlands, and an incorporation of that understanding into the simulation models.