摘要
岩溶环境的元素有效态应当考虑土壤固体、岩溶水、土壤水三种载体。岩溶区富钙偏碱的地球化学背景使土壤中的元素有效态含量较低 ,但相对来说 ,岩石背景含量高的元素 ,其土壤中的有效态含量也明显较高。南方岩溶区强烈的岩溶作用 ,不但使岩石和土壤中可溶性的Ca、Mg、Na、K大量溶解于水中 ,而且 ,某些难溶元素 ,如 Si、Al、Fe、Mn等在岩溶水和土壤水中也有一定的离子含量 ,使之成为植物中元素的一部分来源。
WT5BZ]For studying the liable content of elements in karst environments, one should consider three kinds of carriers: soil, karst water and soil water.Though the alkaline and calcium rich features of soils in karst areas result in a low liable content of alkaline earth elements in soil, their ionic concentration in karst water and soil water serves as an important source of liable elements for vegetation. Moreover, the liable content of elements in soil is different in different rocks. With the solution of rocks, the higher background value of elements in rock usually leads to the higher liable content in soil. There are intense karst processes in south China, as a result, not only soluble K, Na, Ca, and Mg dissolve in water in great concentration, but also some relatively less soluble elements such as Si, Al, Fe and Mn can partly dissolve in karst water and soil water.
出处
《中国岩溶》
CAS
CSCD
2000年第2期123-128,共6页
Carsologica Sinica
基金
国家自然科学基金!( 4963 2 1 0 0和 4 9872 0 96)
国土资源部科技项目!(HY97982 3和 992 0 2 9)
广西自然科学基金匹配项目资助
