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问荆(Equisetum arvense L.Herb)已知硅是在植物界广泛存在着的一种元素,主要以硅酸形式存在。它的含量以植物干重计算,一般地在0.02～0.15%范围内。植物中以木贼科(Equisetaceae)、绵马科(Filices)和禾本科(Gramineae)诸科中含硅最丰富。这些植物的灰分中含硅量高达50%,甚至更多。关于问荆植物中硅含量的报道是在1793年。植物及其灰分中硅的测定结果已经收集在Voronkov、Zelchan和Lukevits的优秀的
Equisetum arvense L.Herb has known that silicon is an element widely found in the plant kingdom and is mainly found in the form of silicic acid. Its content is calculated as the dry weight of the plant and is generally in the range of 0.02 to 0.15%. Among the plants, Equisetaceae, Filices and Gramineae have the most abundant silicon. The ash content of these plants contains up to 50% or even more silicon. The report on the content of silicon in E. arvense plants was in 1793. The results of the determination of silicon in plants and their ash have been collected in the excellent of Voronkov, Zelchan and Lukevits