多年冻土区工程迹地人工恢复区植物和土壤的矿质元素含量特征

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：＞1 000 μg/g的元素有Ca、P和Na，100～1 000 μg/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：＞1 000 μg/g的元素有Ca和Na，100～1 000 μg/g的元素有P、Mn、K、Fe、Mg和Al。人工恢复区土壤元素含量：＞1 000 μg/g的元素有Ca、Fe和Mn，100～1000 μg/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：＞1 000 μg/g的元素有Ca、Fe，100～1 000 μg/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

CHARACTERISTICS ANALYSIS OF MINERAL ELEMENTS CONTENTS IN DOMINANT SPECIES AND SOIL OF ARTIFICIAL RESTORATION VEGETATION OF QINGHAI-TIBET PLATEAU PERMAFROST REGION

We analyzed mineral elements of artificial restoration vegetation of Qinghai-Tibet Plateau permafrost region,plants and soil of superior alpine grassland by atomic absorption spectrometry.Results showed that in artificial restoration areas of permafrost region,contents of Ca、P and Na in plants were above 1 000 μg/g;Mn,K,Fe,Mg and Al were from 100 to 1 000 μg/g.In native prairie plant,contents of Ca and Na in plants were above 1 000 μg/g;P,Mn,K,Fe,Mg and Al were from 100 to 1 000 μg/g.In artificial restoration region,contents of Ca,Fe and Mn in soil were above 1 000 μg/g;Mg,K,Al,P,and Na were from 100 to 1 000 μg/g.In alpine grassland,contents of Ca and Fe in soil were above 1 000 μg/g;Mn,Mg,Al,K,P and Na were from 100 to 1 000 μg/g.Content of Ca was higher than that of K in both plant and soil.The absorption capacity of soil in artificial restoration of vegetation followed the order of Na,P,K,Mg,Mn,Al,Ca,Fe;and that in alpine grassland followed the order of Na,P,K,Mg,Mn,Ca,Fe,Al.The absorptive capacity of soil was rather similar to plants.Accumulation of K and Al had no significant correlation with other elements,while the other elements had positive correlation with each other,which means that there is synergy rather than antagonistic effect among the elements.