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首页> 外文期刊>The Science of the Total Environment >Distribution of nitrous oxide emissions from managed organic soils under different land uses estimated by the peat C/N ratio to improve national GHG inventories
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Distribution of nitrous oxide emissions from managed organic soils under different land uses estimated by the peat C/N ratio to improve national GHG inventories

机译：通过泥炭碳氮比估算不同土地利用下受控有机土壤中一氧化二氮排放量的分布，以改善国家温室气体清单

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摘要

Nitrous oxide (N2O) contributes substantially to greenhouse gas (GHG) emissions in the agricultural and land-use sectors. Owing to the high effort needed for measuring N2O emissions and the resulting lack of sufficient field measurements to apply at country-wide scale, soil-borne N2O emissions are often estimated by applying published IPCC default emission factors. To examine the data reported in the national GHG inventory, the current study utilizes a large data set of soil C/N ratios to predict N2O emissions and their distribution from drained organic soils in Switzerland. Calculated emission rates increase in the order of forest2O emissions are highly positive-skewed and they reveal probabilities of 10 and 14% for cropland and grassland, respectively, to be above 20kg of N2O-N per hectare and year. It is likely that the greater part of N2O from drained organic soil derives from N released upon peat decomposition, and not from fertilization. In conclusion, this research shows that measurement of soil C/N ratios improves the reliability of organic soil N2O emissions estimates on a national scale and identifies site conditions where future emission measurements would be most effective for reducing the uncertainty in the GHG inventory.
机译：一氧化二氮（N2O）在农业和土地利用部门中显着促进了温室气体（GHG）排放。由于测量N2O排放量需要付出巨大的努力，并且由于缺乏足够的现场测量结果而无法在全国范围内使用，因此通常通过应用已发布的IPCC默认排放因子来估算土壤传播的N2O排放量。为了检查国家温室气体清单中报告的数据，本研究利用土壤碳氮比的大型数据集来预测瑞士排放的有机土壤中的N2O排放及其分布。计算得出的排放率以forest2O排放量的顺序呈高度正偏态，它们显示出耕地和草地的概率分别为10％和14％，每公顷和每年超过20kg N2O-N。排出的有机土壤中的N2O大部分可能来自泥炭分解时释放的N，而不是施肥。总之，这项研究表明，在全国范围内测量土壤C / N比可提高有机土壤N2O排放估算的可靠性，并确定未来排放量测量将最有效减少温室气体清单不确定性的现场条件。

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