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选择青藏高原多年冻土区工程迹地的人工恢复植物和紫花针茅草原的优势植物以及对应的土壤样品进行对照,利用原子吸收法分析了它们的矿质元素含量特征。结果表明:多年冻土区工程迹地人工恢复区植物的元素含量:>1 000μg/g的元素有Ca、P和Na,100～1 000μg/g的元素有Mn、K、Fe、Mg和Al;而对照紫花针茅草原优势植物的元素含量:>1 000μg/g的元素有Ca和Na,100～1 000μg/g的元素有P、Mn、K、Fe、Mg和Al。人工恢复区土壤元素含量:>1 000μg/g的元素有Ca、Fe和Mn,100～1000μg/g的元素有Mg、K、Al、P和Na;对照紫花针茅草原土壤元素含量:>1 000μg/g的元素有Ca、Fe,100～1 000μg/g的元素有Mn、Mg、Al、K、P和Na。该区域植物和土壤元素含量都属于Ca>K型。人工恢复植物和对照的紫花针茅草原植物对土壤元素的吸收能力具有较高的相似性。K和Al元素的累积与其他元素没有显著的相关关系,其他元素之间为正相关关系,元素之间的吸收累积属于协同作用,无明显的撷抗作用。
The comparison was made between the artificial plants recovered from the project tracks in the permafrost regions of Qinghai-Tibet Plateau and the dominant plants of Stipa kingnsis and corresponding soil samples, and their mineral element content characteristics were analyzed by atomic absorption spectrometry. The results showed that the element content of plants in the artificial recovery area of permafrost zone was: Ca, P and Na> 1000μg / g, Mn, K, Fe, Mg and Al in 100-1000μg / g; However, the contents of the elements of the dominant plants of A. violaceum:> 1 000 μg / g for Ca and Na, and 100-1 000 μg / g for P, Mn, K, Fe, Mg and Al. The contents of soil elements in artificial restoration area were: Ca, Fe and Mn for> 1 000 μg / g and Mg, K, Al, P and Na for 100-1000 μg / g; The elements of 000μg / g are Ca, Fe and the elements of 100-1000μg / g are Mn, Mg, Al, K, P and Na. Plant and soil elements in this area belong to Ca> K type. Artificial restoration plants and the control of the Stipa grandis plant soil element absorption capacity has a high similarity. There was no significant correlation between the accumulation of K and Al elements and other elements. The correlation between other elements was positive. The absorption and accumulation among elements belonged to the synergistic effect and had no obvious antagonism.