Base cation dynamics in an Oriental beech forest

Throughfall, litterflow and soil solution were sampled during one whole year under five Oriental beech trees in a mixed Hyrcanian beech forest. The amounts of Ca2+, Mg2+, K+ and Na+ in these fluxes were calculated based on their concentrations and the sampled volumes, and subsequently compared with the respective fluxes in the rainfall and soil solution of an adjacent forest gap. In addition six soil profiles, one close to every single tree and one in the forest gap, were analyzed for pH, CaCO3, organic matter and texture.本研究在希尔卡尼亚山毛榉混交林中，针对5株东方山毛榉（Oriental beech）周边的穿透雨（Throughfall）、枯落物淋溶液（Litterflow）与土壤溶液（Soil solution）开展了为期一整年的采样工作。基于各采集样品的浓度与采样体积，计算得到上述三种样品中钙离子（Ca2+）、镁离子（Mg2+）、钾离子（K+）与钠离子（Na+）的通量，并将其与相邻林隙的降雨及土壤溶液对应通量进行对比。 此外，本研究还对6个土壤剖面进行了理化分析：其中5个剖面紧邻每一株目标样树，剩余1个剖面设置于林隙内，检测指标包括pH值、碳酸钙（CaCO3）、有机质含量与土壤质地。