Links between carbon and nitrogen cycling processes in forest soils: An innovative approach with both NMR and stable isotope techniques

了解森林生态系统中土壤碳和氮循环过程之间的关键联系，对于发展有效的立地管理以提高森林生产力和环境效益是必要的。在14 N-核磁共振（NMR）的土壤腐殖酸（HA）的第一个应用程序中，我们已经发现，令人惊讶的是，硝酸盐-N是存在于土壤腐殖酸，与HA-硝酸盐N非常敏感的森林管理措施。该项目代表了第一次尝试整合使用先进的NMR和稳定同位素技术来研究澳大利亚和美国森林生态系统中碳和氮循环过程之间的化学和生物联系。

Understanding the critical links between soil carbon and nitrogen cycling processes in forest ecosystems is necessary for developing effective site management to enhance forest productivity and environmental benefits. In the first application of 14N-nuclear magnetic resonance (NMR) to soil humic acid (HA), we have discovered that surprisingly nitrate-N is present in soil HAs, with the HA-nitrate N extremely sensitive to forest management practices. This project represents the first attempt to integrate the use of advanced NMR and stable isotope techniques to examine both chemical and biological linkages between carbon and nitrogen cycling processes in Australian and US forest ecosystems.