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Mineral composition of dominant plant species growing in a phosphorus mining area

机译：磷矿区主要植物种的矿物组成

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摘要

To evaluate the potential of native plants for phytoremediation, a field survey of terrestrial plants growing in a phosphorus (P) mining area in Shifang, China, was conducted to identify the variation of mineral composition in the soil and plants. The mineral composition [nitrogen (N), P, potassium (K), calcium (Ca), magnesium (Mg), iron (Fe), manganese (Mn), copper (Cu) and zinc (Zn)] of roots and shoots and the rhizosphere soil were determined. To quantify the relative contribution of each component to the overall correlation, path analyses were carried out. The results indicate that the P accumulators (Polygonum hydropiper?and?Pilea sinofasciata) had an advantage in mineral composition. In roots, the highest concentrations of Mg, Fe and Cu were found in?P. hydropiper, and the highest concentrations of Ca were found in?P. sinofasciata.?Moreover,?P. sinofasciata?demonstrated the highest concentrations of Ca and Fe in shoots, which were 2.4 and 4.4 times higher than the mean of all other species. High concentrations of Fe and Mn were also found in the shoots of?P. sinofasciata. In the roots of both plants, Fe had the highest negative direct effect on P, while Ca had a higher positive direct effect on P. In shoots, N had a higher positive direct effect on P, and K had a negative direct effect on P. Interactions between nutrients are important for determining the optimum nutrition for P accumulators.
机译：为了评估原生植物的植物修复潜力，对中国什Shi磷矿区生长的陆生植物进行了实地调查，以确定土壤和植物中矿物成分的变化。根和芽的矿物质组成[氮（N），磷，钾（K），钙（Ca），镁（Mg），铁（Fe），锰（Mn），铜（Cu）和锌（Zn）]确定根际土壤。为了量化每个成分对整体相关性的相对贡献，进行了路径分析。结果表明，P蓄积剂（Polygonum hydropiper？和Pilea sinofasciata）在矿物组成方面具有优势。在根中，？P中镁，铁和铜的含量最高。水pi，钙含量最高。此外，？P。 sinofasciata？证明了芽中Ca和Fe的浓度最高，分别比所有其他物种的平均值高2.4和4.4倍。在？P的芽中也发现了高浓度的Fe和Mn。中华蟾蜍在两种植物的根中，Fe对P的负直接效应最高，而Ca对P的正直接效应更高。在芽中，N对P的正直接效应更高，而K对P的负直接效应更高。营养素之间的相互作用对于确定P累积器的最佳营养至关重要。

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