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以闽江口区最大的鳝鱼滩潮汐盐沼湿地为研究对象,选择远、近潮沟区2个不同潮水水淹地段设置样线,采集3种优势植物芦苇(Phragmites australis)、咸草(Cyperus malac-censisvar.bervifolius)和藨草(Scirpus triqueter)下18个土壤剖面分层样品,分析土壤中DOC、TN和TP等含量和储量的空间分布规律及土壤物理特征对其的影响。结果表明:远、近潮沟区3种植物下土壤表层(0~10 cm)TN浓度范围为0.24~1.91g kg-1,TP为0.21~1.34 g kg-1,DOC为13.68~93.73 mg kg-1,无论是近潮沟区还是远潮沟区,芦苇和咸草下土壤DOC、TN和TP含量十分接近,且均大于藨草下土壤DOC、TN含量,藨草下土壤TN和TP含量和储量在近潮沟区均明显大于远潮沟区,而芦苇和咸草下土壤TN和TP含量在远、近潮沟区差距不大;土壤DOC、TN和TP含量与土壤粒径、容重和含水量呈显著相关,盐度对土壤中NH4+-N和NO3--N含量影响显著,与NH4+-N为正相关关系,与NO3--N为负相关关系。
Taking the largest eel beach tidal salinon wetland in Minjiang Estuary as the research object, two sample plots were set up in two different tidal flooded areas in the near and tidal gully areas to collect three dominant species of Phragmites australis, Cyperus malac-censisvar.bervifolius and Scirpus triqueter were used to analyze the spatial and temporal distribution of DOC, TN and TP in soils and their effects on soil physical characteristics. The results showed that the concentrations of TN (0 ~ 10 cm), soil organic matter (TP), soil organic matter (TP) -1, the contents of DOC, TN and TP in reeds and salty soils were very close, both in the near-tidal zone and in the far-tidal zone, and were higher than those in soil, and TN and TP contents And the reserves in the near tidal gully area were significantly larger than those in the far tidal gully area, while TN and TP contents in reed and salty grass were far away and there was not much difference in the near-tidal gully area. The contents of DOC, TN and TP in soil were significantly correlated with the soil particle size, Significantly correlated with water content, salinity had a significant effect on NH4 + -N and NO3 - N contents in soil, negatively correlated with NH4 + -N and NO3 - N.