罗汉果产区岩石-土-罗汉果微量元素分布与迁聚特征研究

Distribution and Migration Characteristics of Microelements in Rock-SoilSiraitia Grosvenorii System in Siraitia grosvenorii Belt of Guangxi

检测并分析了广西龙胜县罗汉果主产区4个地层岩石-土-罗汉果系统中Cu、Zn、Mo、B、Se等5种微量元素的分布与迁聚特征.结果表明:岩石富含Se、Mo、B,土壤富含Se、Zn,Mo、B、Cu缺乏,罗汉果各器官中以果实中元素含量最低.5种微量元素在岩石、土壤、罗汉果中的含量关系均为:Zn>Cu>B>Mo>Se,且以寒武系清溪组(q)地层微量元素总含量最高,上板溪群(Pt12)含量最低,微量元素在岩石-土-罗汉果系统中的继承性非常明显.5种微量元素在岩石-土-罗汉果系统的总体迁移能力相对较弱,以元素亏损为主要形式.不同地层间微量元素迁移能力存在差异,以茎-叶层位间迁移能力最强,茎-果层位间迁移能力最弱.在岩石-土之间,震旦系(Z)地层以C→B层位间的迁移能力最强,q、Pt12、白垩系(K)地层则以B→A层位间的迁移能力最强.5种微量元素在各地层中的总迁移能力大小存在较大差异.

Distribution and migration of five microelements Cu,Zn,Mo,B,and Se in rock-soil-Siraitia Grosvenorii system in Siraitia grosvenorii belt of Longsheng County in Guangxi Province were investigated and analyzed.The results show that the content of Se,Mo and B in rocks is rich and that of Se and Zn is rich in soil.However,it is deficient in Mo,B and Cu,especiall in fruits of Siraitia Grosvenorii.The concentration sequences of five microelements in rocks,soil and Siraitia Grosvenorii are the same：Zn ＞ Cu ＞ B ＞ Mo ＞ Se.Meanwhile,εq formation has the highest concentration and Pt1/2 has the lowest concentration.That reveals a significant microelements succession in rock-soil-Siraitia Grosvenorii system.The movement ability of mircroelements is weak as element cosing as a main form.The ability differs in formations and layers：strongest between stem-leaf and weakest between stem-fruit.The movement ability of microelements differs greatly in each soil layer.