Determination of forest soil organic nitrogen determination using technique of X-ray absorption near-edge structure

森林土器官的 N 用 N 小锚 X 光检查 absorptionnear 边结构(XANES ) 被调查在数量获得卓见进在 N 种形成和它的转变之间的关系。土壤样品在中央台湾从云杉，铁杉和松森林被收集。结果证明各种各样的器官的 N 类型能被 XANES 系列揭示。酰胺和 pyrrolic N 是在腐殖的物质，可溶的有机氮和原来的土壤的作文的主要部分。N 种形成的相对分发在处理和植被样品不同。云杉在可溶的有机氮(儿子) 从铁杉有重要差别在 402.3 eV 精力的系列达到顶点。在 A 地平线土壤，相对数量 ofpyridinic N 在 O 地平线土壤比那高得多，显示在在矿物质地平线的数量的 N 转变在器官的地平线与那不同，它可能在森林生态系统骑车的 N 起一个重要作用。

The forest soil organic N was investigated using N K-edge X-ray absorption near-edge structure （XANES） to gain an insight into the relationship between N speciation and its transformation in quantity. Soil samples were collected from spruce, hemlock and pine forests in central Taiwan. Results showed that various organic N types could be revealed by XANES spectra. Amide and pyrrolic N are the major parts of the composition in the humic substance, soluble organic nitrogen and original soils. The relative distribution of N speciation differed in treatments and vegetations samples. The spruce had a significant difference from the hemlock in soluble organic nitrogen （SON） spectra at 402.3 eV energy peak. In the A-horizon soils, the relative amount of pyridinic N was much higher than that in the O-horizon soils, indicating N transformation in quantity in the mineral horizon was different from that in the organic horizon, which might play an important role in N cycling of forest ecosystems.