Study On Root Biomass Distribution And Traits Of Plant Communities In Jinchuan Peatland

As a carbon source or pool, wetland plays an important role in the global carbon cycle. Roots of wetland plant are the active position underground where plants, microbes and other substances interact with each other. The root biomass, length, surface area, volume, specific root length and vertical distribution are related with the physical, chemical and biological characteristics of wetland. The distribution of plant roots is one of key factors to evaluate the potentials of wetland plants applying in water-filtration. In 2010, experiments were conducted in 15 wetland communities of Jinchuan Peatland in Huinan county which located in northern of Changbai Mountain. The in-growth bag and drilling methods were used in the research. Root biomass, fine root annual biomass, vertical distribution of root, above-ground biomass, and environmental factors were detected in different communities to determine the fine root growth, root biomass; the vertical distribution of root; the root traits; and the relationships between root traits and above-ground biomass, under-ground biomass, and environmental factors. Results showed as below:1. The root biomass between 0-60cm deep soil was 367.62 -1197.42 g/m~2, and the fine roots annual growth was 5.39-141.42 g/m~2 in Jinchuan peatland.2. The vertical distribution of root biomass, fine root annual growth, root length, root surface area and root volume showed "T" glyph. The roots in 0-40cm soil was the 80-90% of the total root in Jinchuan peatland.3. The root biomass was negatively related with the above-ground biomass, and pH of water.4. The root traits were positively related with the underground biomass. The specific root length was positively related with the above-ground biomass. There was a positive relationship between root volume and total biomass.5. There were insignificant relationships between root traits, such as root length, root surface area and root volume, and environmental factors measured in this study. The specific root length positively related with water level, pH of water (0-20cm, 20-40cm) and soil total nitrogen (0-20cm) .