不同岩溶生态系统中元素的地球化学迁移特征比较——以广西弄拉和弄岗自然保护区为例  

COMPARISON OF GEOCHEMICAL LEACHING CHARACTERISTICS OF ELEMENTS BETWEEN DIFFERENT KARST ECOSYSTEMS——A Case Study in Guangxi Nongla and Nonggang Natural Forest Reserve Areas

作　　者：邓艳[1] 蒋忠诚[1] 罗为群[1] 陆瑞群[1] 曾玉和[1] 黄红慧[1] 

机构地区：[1]中国地质科学院岩溶地质研究所,广西桂林541004

出　　处：《中国岩溶》2006年第2期168-171,共4页Carsologica Sinica

基　　金：国家自然科学基金项目(40572151);中国地质科学院重点开放实验室专项资金(KL05-21);国家"十五"科技攻关项目(2001BA606A08);广西科技厅项目(0322027-8)

摘　　要：研究了广西弄拉和弄岗自然保护区两种不同岩溶生态系统的元素地球化学循环特点,结果表明,弄拉、弄岗的成土过程都表现为S i和F e相对累积,而其它化学元素则表现为相对淋失。弄岗与弄拉相比,其元素的淋失程度更为强烈,但在植物中两者表现出比较相似的元素地球化学特点。弄岗泉水pH比弄拉的低,水的溶蚀能力增大,水中可溶物增多,元素循环也比弄拉的快。This paper deals with the elements＇ geochemical characteristics in different karst ecosystems. The results show that the elements Si and Fe are cumulating, while other elements leaching in the forming processes of soil. The elements leaching in Nonggang is stronger than that in Nongla. The elements＇ geochemical characteristics in plant in two areas are similar. The pH of spring water in Nonggang is lower than that in Nongla, and so the water is more aggressive, and the elements leaching is quicker in Nonggang than that in Nongla.

关 键 词：岩溶生态系统 地球化学循环 元素迁移 弄拉、弄岗自然保护区 广西 

分 类 号：P593[天文地球—地球化学]