Abstract: Studies on existent forms of Zn supplemented into drab soil with tracer technique and chemical sequential extraction procedure show that the amount of exchangeable and carbonate bound ⁶⁵Zn occupies 63-72% of the total soil Zn.The intensity factor of soil Zn is increased with the increasing amount of added Zn, and its diffusion coefficient (D) at 4 and 100% of soil moisture content is respectively 7.9×10^-8 and 6.6 × 10^-5cm²s^-1. At 30 and 70% of soil moisture content,the average retention time of Zn in applied area is respectively 9 and 4 days,and its diffusion degree (σ²) is increased from 0 to 0.371.

Key words: Supplemented Zn, Existent form of Zn, Drab soil, Soil moisture, karst, invasive plant, meta analysis, linear mixed effect model, diversity, Praxelis clematidea