1. Key Laboratory of Vegetation Ecology; Ministry of Education; Institute of Grassland Science; Northeast Normal University; Changchun China
2. Key Laboratory of Wetland Ecology and Environment; Northeast Institute of Geography and Agroecology; Chinese Academy of Science; Changchun China
3. Alkali Soil Nature Environmental Science Center; Northeast Forestry University; Harbin China
4. Faculty of Chemistry; Northeast Normal University; Changchun China