早期研究显示，原生状态下贵州碳酸盐岩出露区域土壤重金属多处于“高背景，低活性”状态，诱发地方病的现象较少。在强烈的农业活动介入后，高库容的土壤重金属被“活化”现象突出，农产品重金属暴露严重。基于此，本项目拟通过室内模拟不同水平碳酸盐、含水量、粘粒对土壤基本属性的影响，及其与重金属存在形态和吸附-解吸过程的协变关系，探讨高背景土壤重金属的累积机理；同时，模拟土地开垦、不同类型化肥和有机肥的施用，以及水旱轮作等主要农事行为对重金属形态的影响，及其与原始土壤结构和性状的协变关系，揭示贵州碳酸盐岩地区土壤高背景重金属活化与主要农用行为的内在关联性；并选择具有代表性的几类农作物进行温室栽培和大田生产研究不同种类有机-无机肥的配比及施入过程对生物体重金属累积的影响，以探寻不同类型土壤最佳的肥料配比和施入方式，从而为提高农产品品质和食品安全，合理配制有机肥提供科学依据。

In the early research the soil without anthropogenic disturbing have high heavy metal elements background, but low activity on the carbonate distribution area Southwest of China. After land use changed by human, it is possible that these heavy metal elements would be activated, and these heavy metal elements explosion in agricultural products has been more serious. To research what is possible reasons to result in these phenomenon, some experiments was designed to test the heavy metal elements accumulation mechanism in primary soil by observing the change of heavy metal elements species, soil basic properties and adsorption and desorption under several levels of carbonate, humidity, and soil clay concentration. To reveal the relationship between activation process of heavy metal elements and agricultural behaviours, some simulation experiments on the cultivation, fertilization process of organic-inorganic materials will be conducted. To look for some optimized measures for fertilization, some heavy metal elements accumulation process will be observed under different fertilization pattern in green house and field. Through these researches results, it could be used to balance food safety and output.