『Abstract
　The Ferrous Wheel Hypothesis (Davidson et al. 2003) postulates the abiotic formation of dissolved organic N (DON) in forest floors, by the fast reaction of NO2^- with dissolved organic C (DOC). we investigated the abiotic reaction of NO2^- with dissolved organic matter extracted from six different forest floors under oxic conditions. Solutions differed in DOC concentrations (15-60 mg L^-1), NO2^- concentrations (0, 2, 20 mg NO2^--N L^-1) and DOC/DON ratio (13.4-25.4). Concentrations of added NO2^- never decreased within 60 min, therefore, no DON formation from added NO2^- took place in any of the samples. Our results suggest that the reaction of NO2^- with natural DOC in forest floors is rather unlikely.

Keywords: Abiotic nitrite immobilization; Dissolved organic carbon; Dissolved organic nitrogen; Ferrous Wheel Hypothesis』

Introduction
Materials and methods
Results and discussion
Acknowledgments
References