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本文采用了原子吸收光度法,以黄芪、大青叶、夏枯草、板兰根和甘草作为对象,用逐级浸取方法研究了铜、铅和镉在其体内的形态。结果表明,在五种药用植物体内,铅和镉都以活性较低的酸溶态和残留态为主;铜在黄芪、板兰根和甘草体内以活性较高的水溶态为主,残留态占有较大比例,而在大青叶和夏枯草体内却以活性较低的酸溶态为主。通过对重金属Cu、Pb和Cd的形态分析,了解了铜、铅、和镉在植物体内的相应迁移转化情况,这对于阐明其生理作用特征等都具有重要意义。本文通过实验初步探讨了铜、铅和镉在黄芪、大青叶、夏枯草、板兰根和甘草中的各种化学形态的含量和分布特征,为明确其在五种药用植物体内转运情况和合理施用微量元素肥料提供科学依据。
In this paper, atomic absorption spectrophotometry was used to study the morphology of copper, lead and cadmium in the body of Astragalus, Folium, Prunella, Banlangen and Glycyrrhiza. The results showed that in the five medicinal plants, lead and cadmium were mainly in the acid-soluble state and the residual state with lower activity; copper was mainly in the water-soluble state with higher activity in Radix Astragali, Banlangen and Glycyrrhizae, and the residual state occupied. A large proportion, but in the Folium and Prunella in the body is the lower activity of the acid-soluble state. Through the morphological analysis of heavy metals Cu, Pb, and Cd, the corresponding migration and transformation of copper, lead, and cadmium in plants was understood, which is of great significance for elucidating their physiological effects. In this paper, the contents and distribution characteristics of various chemical forms of copper, lead and cadmium in Astragalus membranaceus, Daqingye, Prunella vulgaris, Banlangen, and Glycyrrhiza uralensis were preliminarily explored through experiments, in order to clarify its transport status and rationality in five medicinal plants. The application of trace element fertilizer provides scientific basis.