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首页> 外文期刊>Aquatic Botany >Chemical characteristics of soils and pore waters of three wetland sites dominated by Phragmites australis: relation to vegetation composition and reed performance
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Chemical characteristics of soils and pore waters of three wetland sites dominated by Phragmites australis: relation to vegetation composition and reed performance

机译：以芦苇为主的三个湿地土壤和孔隙水的化学特征：与植被组成和芦苇表现的关系

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摘要

Chemical characteristics of soils and soil pore waters, plant species composition and horizontal stand structure were investigated for three reed stands in the Trebon Basin (Czech Republic): Branna sand pit and two littoral stands of Rozmberk fishpond (Rozmberk East and Rozmberk West). Phragmites stands were expanding, stable and retreating at the three sites, respectively. The elemental soil composition (especially of C, N, P, and K) indicated the lowest trophic conditions at Branna, intermediate at Rozmberk East and the highest at Rozmberk West. This corresponded well also with concentrations of ammonium nitrogen, dissolved reactive phosphate and total phosphorus in the soil pore water. In contrast, Branna had by far the highest level of total nitrogen, determined by nitrate nitrogen (20 mg l(-1)), and the highest level of total dissolved solids (concentrations of NO3-, SO42-, Ca2+ and Mg2+) of all three sites. No conspicuous differences were found among the three stands in biomass and its allocation. The vegetation composition corresponded more closely to elemental soil composition than to total nitrogen or total dissolved solids in the pore water. It is concluded that Branna provides an example of a site subjected to an initiating but dramatic and fast eutrophication while conditions at the two Rozmberk sites indicate a slower but longer lasting eutrophication. Owing to continuous heavy organic loading, Rozmberk West represents a hypertrophic site characterised by the highest levels of organic matter and associated characteristics (soil C, N, P, K, dissolved P), but also by the most severe lack of oxygen of the three sites.
机译：研究了Trebon盆地（捷克共和国）的三个芦苇林的土壤和土壤孔隙水的化学特征，植物物种组成和水平林分结构：Branna沙坑和Rozmberk鱼塘的两个沿海林分（Rozmberk East和Rozmberk West）。芦苇的立场分别在这三个地点扩大，稳定和后退。土壤元素组成（尤其是C，N，P和K）表明，在Branna的营养条件最低，在Rozmberk East的中等，在Rozmberk West的最高。这也与土壤孔隙水中铵态氮，溶解的反应性磷酸盐和总磷的浓度非常吻合。相反，Branna具有最高水平的总氮（由硝酸盐氮（20 mg l（-1））确定）和最高水平的总溶解固体（NO3-，SO42-，Ca2 +和Mg2 +的浓度）所有这三个站点。在三个生物量及其分配中未发现明显差异。与孔隙水中的总氮或总溶解固体相比，植被组成与土壤元素的组成更接近。结论是，Branna提供了一个发生富营养化的实例，而富营养化的过程却十分迅速，而两个Rozmberk站点的状况表明富营养化的持续时间却比较缓慢但持续时间更长。由于持续的大量有机负荷，Rozmberk West代表了肥厚的地方，其特征是有机物含量最高和相关特征（土壤C，N，P，K，溶解的P），但同时也是这三种元素中最严重的缺氧网站。

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