铜矿尾矿库无土修复植物营养元素含量特征

分析了安徽铜陵冬瓜山铜矿杨山冲尾矿库10种无土修复植物中10种营养元素含量特征。结果表明：平均含量大于1000μg·g^-1的元素有7个，含量从太到小顺序为Ca〉N〉S〉K〉Fe〉Mg〉P；平均含量为100μg·g^-1～1000μg·g^-1。的元素有3个，含量从大到小的顺序为Na〉Si〉Mn。营养元素含量的变异系数...

Characteristics of Nutrient Element Contents in Plants Grown in Copper Mine Tailings

The concentrations of ten nutriment elements in ten plant species grown in the Yangshanchong mine tailings of the Dongguashan Copper Mine in Tongling,Anhui Province,were analyzed.The results showed that the contents of Ca,N,S,K,Fe,Mg and P are higher than 1000 μg·g-1 in descending order;those of Na,Si and Mn vary between 100 and 1000 μg·g-1 in descending order.The coefficients of variation(C.V.) for these elements are less than 1.Na has the lowest C.V.at about 19.1%,but Mg has the highest C.V.at about 80.8%.Different plants have changing element contents and element ratios.K/Mg has the maximum ratio,but K/Ca has the minimum.Correlation analysis among elements indicated K and Ca,Ca and Si,Mg and N,Fe and Mn are statistically significant in different plant species(p<0.01);Ca and Mg,Ca and Mn,Mg and Mn,Mg and P,S and Na are of positive correlation(p<0.05),but S and Na are of negative correlation.Four principal components were obtained to indicate the element contents in plants using principal component analysis.Basis on the composite factor scores,Coreopsis drummondii Artemisia lavandulaefolia,Crotalaria pallida rank the top three,which means they have higher element contents than others,and their growing conditions are better than the others.