广东台山镇海湾红树林国家湿地公园土壤有机碳含量及其影响因素分析

Contents of Soil Organic Carbon of Mangrove in Haiwan Mangrove National Wetland Park,Taishan Town,Guangdong and Their Influencing Factors

通过对比广东台山不同红树林群落土壤有机碳含量及其分布规律,研究了不同红树林群落土壤有机碳含量与土壤理化指标之间的关系。以桐花树Aegiceras corniculatum群落、秋茄Kandelia candel群落、海榄雌Avicennia marina群落、无瓣海桑Sonneratia apetala群落、卤蕨Acrostichum aureum群落和老鼠簕Acanthus ilicifolius群落为研究对象,通过采集0~10 cm,10~20 cm和20~40 cm层次的土壤,测定其土壤有机碳含量,分析其主要影响因素因素。研究结果表明,在表层土壤0~10 cm中,秋茄群落和海榄雌群落的有机碳含量显著高于其他群落,分别为3.18%和3.13%;红树林群落0~40 cm平均土壤有机碳密度从大到小排列顺序分别为海榄雌>秋茄群落>无瓣海桑>桐花树>老鼠簕>卤蕨。土壤有机碳含量与电导率和含水率显著正相关,与土壤容重显著负相关。

This study compared the soil organic carbon content and distribution of different mangrove plantations in Taishan Town(Guangdong province)to reveal the relationship between the soil organic and soil physical and chemical properties indexes.Six different mangrove plantations,including Aegiceras corniculatum,Kandelia candel,Avicennia marina,Sonneratia apetala,Acrostichum aureum and Acanthus ilicifolius were selected in this study.Samples in the top 40 cm of the soil were sampled and then the soil physical and chemical properties were measured.The results showed that in the surface soil of 0-10 cm,the soil organic carbon of K.candel plantation and A.marina plantation was significantly higher than that of others;the carbon storage of different plantations ranked as:A.marina>K.candel>S.apetala>A.corniculatum>A.ilicifolius>A.aureum.Soil organic carbon was significantly negatively correlated with soil density,and positively correlated with the soil conductivity and water content.