大黄是青海省传统的出口名药，西宁大黄在国内外药材市场上久负盛名。
Chinese rhubarb is a traditional chinese medicinal materials that used for the export in the Qinghai province and Chinese rhubarb of Xining is well-knows in the market at home and abroad.
方法定期采集青海西宁二年生种植大黄，跟踪分析测试其钾、钠、钙、镁、磷等矿物质元素。
Methods Rhubarb cultivated in Xinning of Qinghai growing for two years was picked, and the contents of K, Na, Ca, Mg, P in them were analyzed.
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