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首页> 外文会议>Third International Symposium on Non-Co_2 Greenhouse Gases: Scientific Understanding, Control Options and Policy Aspects Jan 21-23, 2002 Maastricht, The Netherlands >The N_2O content of soil air at different depths as well as its related content in and transport by seepage in lysimeter soils
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The N_2O content of soil air at different depths as well as its related content in and transport by seepage in lysimeter soils

机译：渗漏土壤中不同深度土壤空气中N_2O含量及其相关含量及通过渗流运移

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摘要

Soils are one of the main sources of nitrous oxide (N_2O). Part of the N_2O formed in the soil may - owing to its good solubility in water - be transported by seepage into the groundwater. Lysimeters equipped with the necessary online analysis equipment and sampling devices are ideal for studying N_2O formation and discharge. We report on the N_2O content in the soil atmosphere at various depths of monolithic cores of an Eutric Cambisol and a Plithic Lixisol soil (each fertilized with organic manure), the N_2O emissions at the surface, and also the N_2O content of the seepage. Despite the high concentrations of N_2O in the deeper soil layers [up to 34 ppm(v)], the emissions were very low (mean 2.5-5.7 μg N/m2~*h) and discharge via leachate was rather low as well (max. 0.1 kg N/ha~*yr). The results differed remarkably between the two soils investigated.
机译：土壤是一氧化二氮（N_2O）的主要来源之一。由于其在水中的良好溶解性，土壤中形成的一部分N_2O可能会通过渗漏运到地下水中。配备必要的在线分析设备和采样设备的测渗仪非常适合研究N_2O的形成和排放。我们报告了在不同深度的Eutric Cambisol和Plithic Lixisol土壤（均施以有机肥）的土壤深度中土壤大气中的N_2O含量，地表N_2O排放以及渗流的N_2O含量。尽管在较深的土壤层中N_2O浓度很高[高达34 ppm（v）]，但排放量非常低（平均2.5-5.7μgN / m2〜* h），通过渗滤液的排放也很低（最大0.1千克N / ha〜* yr）。在两种被调查的土壤之间，结果差异很大。

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