Department of Earth and Ecosystem Sciences, Lund University, Sölvegatan 12, SE-223 62 Lund, Sweden.
Environ Pollut. 2010 Dec;158(12):3588-95. doi: 10.1016/j.envpol.2010.08.012. Epub 2010 Sep 22.
Nitrogen leaching from boreal and temporal forests, where normally most of the nitrogen is retained, has the potential to increase acidification of soil and water and eutrophication of the Baltic Sea. In parts of Sweden, where the nitrogen deposition has been intermediate to high during recent decades, there are indications that the soils are close to nitrogen saturation. In this study, four different approaches were used to assess the risk of nitrogen leaching from forest soils in different parts of Sweden. Nitrate concentrations in soil water and C:N ratios in the humus layer where interpreted, together with model results from mass balance calculations and detailed dynamic modelling. All four approaches pointed at a risk of nitrogen leaching from forest soils in southern Sweden. However, there was a substantial variation on a local scale. Basing the assessment on four different approaches makes the assessment robust.
从北方森林和温带森林中淋滤出的氮（通常情况下，大部分氮会被保留在森林中）有可能会增加土壤酸化和波罗的海富营养化的程度。在过去几十年中，瑞典部分地区的氮沉积处于中等到高等水平，有迹象表明，这些地区的土壤已经接近氮饱和。在这项研究中，使用了四种不同的方法来评估瑞典不同地区森林土壤氮淋滤的风险。土壤水中的硝酸盐浓度和腐殖质层中的 C:N 比值，以及基于质量平衡计算和详细动态建模的模型结果，都被用来进行解释。这四种方法都表明，瑞典南部的森林土壤有氮淋滤的风险。然而，在局部范围内存在很大的差异。基于四种不同方法进行评估，使评估结果更加稳健。
