闽江口湿地土壤——植物体系有机碳的分布特征

对闽江口湿地5类典型群落土壤植物体系有机碳的分布特征进行了研究。结果表明:5类群落土壤中的有机碳含量最大值均出现在土壤亚层,沿土壤剖面整体上呈现下降的趋势,与其它群落相比,秋茄群落土壤具有较高的有机碳含量;5类湿地植物各部份的有机碳含量具有一定的差异性,在根、枝及叶中的含量最高值分别为香蒲根系、秋茄枝干及香蒲叶片;土壤有机碳与全氮、全磷的相关性分析表明,芦苇群落土壤有机碳仅与全氮含量表现出明显相关性,短叶茳芏群落土壤有机碳仅与全磷含量表现出明显相关性,其它群落土壤有机碳与全氮、全磷均具有明显相关性。

Organic carbon distribution in the soil-plant systems in Minjiang estuary wetland

Distribution characteristic of the organic carbon in the soil-plant systems of Minjiang estuary wetland was studied.The results showed that the organic carbon contents in all the soil sublayers were higher than those in other layers,and decreased with the increase of the profile depth in all communities.Compared with other community soils,the organic carbon content of soil in Kandelia candel community was relatively higher.The organic carbon contents in different plant organs varied and the maximum value in roots,branches and leaves occurred in Typha latifolia roots,K.candel branches and T.latifolia leaves respectively.The correlation analysis indicated that the organic carbon contents of soil in Phragmites communis community and Cyperus malaccensis community were only correlated with total nitrogen and total phosphorus respectively,while in the other community soils;both total nitrogen and total phosphorus were the factors which showed significant effects on the organic carbon content.