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芦苇是生态域极广的一种禾本科芦竹亚科植物,且其植硅体含量丰富,基于此,本文探讨了东北地区不同温度带及生长期的不同阶段芦苇植硅体浓度的变化规律,揭示芦苇植硅体的环境指示意义,从而为定量恢复古环境和探讨植硅体形成机理提供相关参考。结果表明:东北地区12个样点芦苇样品中共包含6种主要植硅体类型,其中鞍型的含量最高,是芦苇植硅体的优势类型。同时在不同温度带及生长期芦苇植硅体浓度具有明显差异。在东北地区,从温带到暖温带,芦苇植硅体和鞍型浓度均随温度升高而增多,但在不同湿度区,其随温度的变化趋势并不一致。总的来看,东北地区芦苇植硅体和鞍型浓度与温度的关系密切,可指示环境温度的变化,但其在一定程度上也受湿度的影响。在6—10月,芦苇植硅体和鞍型浓度均在其生长初期较多,而在9、10月相对较少,并推测植物植硅体浓度的变化规律可能与植物生长本身对硅的需求规律相一致。该结果有助于理解植硅体的形成机理,从而促进植硅体分析在古环境研究中的应用。
Phragmites australis is a very broad ecologically-rich species of Acridophyceae, and its rich phytoliths content, based on this, this paper discusses the different temperature zones and growth stages of the Northeast China at different stages of reed phytic acid concentration changes , Reveals the significance of the environmental reed Phyllosophytic indication of the environment for the quantitative recovery of ancient environment and explore the mechanism of phytoliths provide relevant reference. The results show that there are six main phytolith types in 12 sample reed samples in Northeast China, of which the saddle type is the highest, which is the dominant type of Phytoremediation. At the same time, the concentrations of phytoliths in reeds were significantly different in different temperature zones and growing periods. In northeastern China, from the temperate zone to the warm temperate zone, the concentrations of phytohormones and saddles in reeds increased with the increase of temperature, but the trends of them varied with temperature in different humidity zones. In general, the concentration of phyllosilican and saddle in the northeast reed is closely related to the temperature, indicating the change of the ambient temperature, but it is also affected to some extent by the humidity. In June-October, the concentrations of Phytoremediation and Saddle-type Phragmites australis were higher at the initial stage of their growth, but relatively less in September and October. It was speculated that the variation of plant phytoremediation concentration might be related to the growth of plant itself The law of demand is consistent. This result is helpful to understand the formation mechanism of phytoliths and promote the application of phytolith analysis in paleoenvironmental research.