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

作     者：ZHUANG Shun-yao XU Meng-jie HU Zheng-yi ZHUANG Shun-yao;XU Meng-jie;HU Zheng-yi

作者机构：State Key Lab of Soil Science and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences Nanjing 210008 P. R. China Department of Public Management Nanjing Agricultural University Nanjing 210095 P. R. China 

出 版 物：《Journal of Forestry Research》 (林业研究（英文版）)

年 卷 期：2006年第17卷第3期

页      面：189-192页

核心收录：

学科分类：09[农学] 0903[农学-农业资源与环境] 090301[农学-土壤学] 

基　　金：This paper was supported by Front Project of Knowl-edge Innovation Program  Chinese Academy of Sciences (ISSASIP0205) 

主　　题：Forest soils N K-edge XANES spectra Nitrogen speciation Organic nitrogen Nitrogen transformation 

摘      要：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.