海南岛琼北地区砖红壤中Pb含量与分布特征研究

Study on Pb Content and Distribution Characteristics of Latsol in Northern Hainan Area

选择海南岛琼北地区发育典型的砖红壤作为研究对象,对43个砖红壤样品中的Pb含量进行了测定.测定结果表明:琼北地区砖红壤中Pb的平均含量比海南岛砖红壤背景值高;地貌条件对砖红壤中Pb含量的分异有显著影响;从不同母质砖红壤中Pb分布特征来看,花岗岩砖红壤、砂页岩砖红壤中Pb富集于心土层和底土层,砂泥岩砖红壤中Pb富集于表土层,浅海沉积物砖红壤中Pb富集于心土层;不同成土母质砖红壤中Pb含量也不相同,浅海沉积物砖红壤(43.75μg·g-1)>砂泥岩砖红壤(43.53μg·g-1)>花岗岩砖红壤(40.96μg·g-1)>砂页岩砖红壤(16.25μg·g-1);从分异程度来看,Pb在浅海沉积物砖红壤中分异程度最大,在砂泥岩砖红壤中分异程度最小.

Choose the typical developed latosol in Hainan Northern area as study object, Pb concentrations of 43 latosol samples of Hainan island were measured. The results showed that Ph average concentration of latosol in Northern Hainan island is higher than the background value of latosol in Hainan Island; Geomorphological condition has a significant impact on the Pb distribution in latosol; View from Pb distribution characteristics in different parent materials latosol, Pb concentrated in heart soil and subsoil in granite, sandstone and shale latosol, and concentrated in topsoil in sandstone and mudstone latosol. Pb content is not the same in different soil-forming parent material latosol： shallow-water sediments latosol （43.75 μg·g-1）〉 sandstone and mudstone latosol （43.53 μg·g-1）〉 granite latosol （40.96 μg·g-1）〉 sandshale latosol （16.25 μg·g-1）; View from the distribution rate, Pb distribution has maximum degree in coastal sediments latosol and minimum degree in sandy mudstone latosol.