根系是湿地生态系统土壤--植物--大气之间物质和能量循环的主要通道，根系构型的空间分布格局及其环境响应机制，体现了植物根系吸收效率与生物量投资之间权衡关系，是认识湿地植物生长发育、繁殖和防御等生命过程的重要理论基础。由于水文周期影响下内陆盐沼湿地植物根系功能性状空间分布格局、资源配置模式及其生境依赖规律研究不够清晰，无法阐述盐沼湿地根系分支模式和延伸策略，成为解析盐沼湿地植物种间种内关系和植物群落功能稳定性维持机理的重要瓶颈。有鉴于此，本项目拟以柴达木盆地北缘的苏干湖盐沼湿地为研究对象，采用室内外实验和半变异函数、GAM模型分析方法，研究水淹梯度下盐沼湿地植物根系功能性状空间异质性及其生物量分配模式，确定根系几何形态、分支结构关键参数的空间分布特征及其生境依赖关系，阐明内陆盐沼湿地主要植物根系分支模式和延伸策略，丰富盐沼湿地植物根系生态学理论，为揭示植物根系构型可塑性的环境适应机理提供理论

The root system is the main channel of the material and energy circulation between the soil-plant-atmosphere of the wetland ecosystem. The spatial distribution pattern and environmental response mechanism of root architecture reflect the trade-off between plant root absorption efficiency and biomass investment, is the theoretical basis to know the life process of plant growth, reproduction, defense and so on. Due to the research on the spatial distribution pattern of functional characters of plant root system, resource allocation pattern and habitat dependence rule under the influence of hydrologic cycle in the inland salt-marsh wetland is not clear, cannot set the root branch mode and extension strategy in inland salt-marsh wetland, which become an important bottleneck to analyze the stability maintenance mechanism of plant community function and community stability maintaining mechanism of plant species in inland salt-marsh wetland. For this reason, this project intends to take salt marsh wetland in the northern margin of qaidam basin Sugan Lake, Gansu Province as the research object, use the indoor and outdoor experiments and the analysis method of GAM model, studies the spatial heterogeneity of root function characters and biomass allocation model of salt marsh wetland plants under the flood gradient, confirms the spatial distribution characteristics and the relation of habitat dependence, clears Branching pattern and extension strategy of main plants in inland salt-marsh wetland, enriches ecology theory of plant root in inland salt-marsh wetland, providing theoretical reference to reveal the environmental adaptation mechanism for plasticity of the root system.