%A Hong Jiang, Yingying Bai, Yingfu Rao, Chong Chen, Yongli Cai %T Fine Root Biomass and Morphological Characteristics in Three Different Artificial Forest Communities in Newly Reclaimed Saline Soil %0 Journal Article %D 2016 %J Chinese Bulletin of Botany %R 10.11983/CBB15103 %P 343-352 %V 51 %N 3 %U {https://www.chinbullbotany.com/CN/abstract/article_2917.shtml} %8 2016-05-01 %X

Fine root is the main organ of plants absorbing water and nutrients. Fine root biomass is important for restoring saline soil. We considered 3 plant communities along a saline reclamation riparian zone in the Lingang district of Shanghai and studied the variation in fine-root biomass, vertical distribution and morphological indicators of fine roots in salinity. The mean fine-root biomass in 3 communities (Populus adenopoda, Cinnamomum japonicum and Taxodium distichum forest) in the 0 to 40 cm soil layer were 1 699.75, 498.50 and 520.06 g·m-2, respectively. In the 3 forests, fine-root biomass was significantly affected by soil depth, and fine roots at the 0 to 10 cm soil layer accounted for more than 50% of the total fine-root biomass; with increasing soil layer, the fine-root biomass index decreased (P<0.05). The fine-root biomass of different communities showed existential bimodal changes in the growing season, with significant difference between months. The biomass and length of living fine roots were all decreased in the order of P. adenopoda> T. distichum>C. japonicum forest. We found a significant relation between soil moisture content and living fine-root biomass and density (P<0.01). CCA analysis showed that soil moisture content was the main limiting factor of change in various vertical indexes of live fine roots, and high salt may have an adverse effect on fine-root biomass and distribution.