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2011年8月,在辽河口芦苇(Phragmites australis)沼泽采集土壤样品,在室内对土样进行测试分析,研究芦苇群落退化演替过程中,芦苇沼泽土壤营养元素和含盐量的变化。结果表明,在芦苇群落退化过程中,土壤有机质含量先增加后减少,土壤全氮和全磷含量的变化也有相似规律,二者与土壤有机质含量呈显著正相关,说明土壤中氮和磷的来源主要是动植物残体积累;土壤速效钾和易溶盐含量呈逐渐增加的趋势;土壤营养元素和含盐量的垂直分布表明,随着土壤深度的增加,土壤有机质含量、全氮含量、速效钾含量和易溶盐含量逐渐降低,但全磷含量无明显变化。
In August 2011, soil samples were taken from the Phragmites australis swamp in Liaohe estuary. Soil samples were tested indoors to study the changes of nutrient elements and salinity in the reed swamp soil during the succession and degeneration of Phragmites australis community. The results showed that during the degradation of Phragmites communis, soil organic matter content first increased and then decreased, and the changes of soil total nitrogen and total phosphorus content also had similar rules, which showed a significant positive correlation with soil organic matter content, indicating that the source of nitrogen and phosphorus in soil Mainly the accumulation of animal and plant residues; the content of available potassium and soluble salt in soil showed a gradual increase trend; the vertical distribution of soil nutrient elements and salt content showed that with the increase of soil depth, the contents of soil organic matter, total nitrogen, Potassium content and soluble salt content gradually decreased, but no significant change in total phosphorus content.