岩溶动力系统对典型石灰岩土肥力特征的影响  

EFFECT OF KARST DYNAMIC SYSTEM ON FERTILITY OF TYPICAL CALCAREOUS SOILS

作　　者：何子平[1] 蒋忠诚[2] 吕维莉[1] 陈桂芬[1] 蒙炎成[1] 

机构地区：[1]广西农科院土壤肥料研究所,南宁530007 [2]中国地质科学院岩溶地质研究所,国土资源部岩溶动力学开放研究实验室,桂林541004

出　　处：《中国岩溶》2001年第3期231-235,共5页Carsologica Sinica

基　　金：国家自然科学基金项目 (3 0 0 60 0 2 2 );国土资源部科技项目 (992 0 2 9; DKD2 0 0 2 0 0 8)和岩溶动力学开放研究实验室资助

摘　　要：碳酸盐岩 (Ca CO3)— CO2 (气 )—水 (H2 O)三相组成的岩溶动力系统 ,通过驱动环境元素的迁移 ,可影响土壤的基本性质及营养元素的形态和转化。一方面土壤盐基离子 (Ca、Mg、K、Na)的大量淋失 ,另一方面岩溶作用产生的富钙环境使土壤体系中盐基获得补充 ,形成偏碱的土壤环境 ,并因此使石灰岩土的阳离子交换量和有机质含量较高 ,但也降低了土壤铁、锰、磷、锌等元素的有效性 ,最终对土壤肥力特征及演变产生深远的影响。Element migration in a karst dynamic system in the cycling process of CO 2 (gas) Water (liquid) Carbonate rock (solid) three phases has a profound impact on soil fertility and the state and transformation of nutrient elements. On the one hand, some salt base ions in soil, such as Ca, Mg, K, Na, are leached largely. On the other hand, the Calcium rich environment, formed in karst processes, makes salt base ions in the soil system replenish frequently and result in alkaline soil, which not only leads to higher quantity of cation exchange and large content of organic materials in soil, but also reduces the validity of the elements, such as Fe, P, Zn and so on. Therefore, the karst dynamic system plays an important role in the fertility and evolution of soil.

关 键 词：岩溶动力 石灰岩土 肥力特征 碳酸盐岩 土壤肥力 

分 类 号：S158[农业科学—土壤学]