College of Earth Sciences, Jilin University, Changchun 130061, China

Aiming to understand the copper and zinc abundance, available form transformation and its natural impact factors of soils in mid-western Jilin Province, the authors systematically evaluated and analyzed the data of top soil samples collected from the cultivated lands of six sampling sites (Lishu-Gongzhuling, Jiutai-Dehui, Yushu-Fuyu, Nongan, Da'an and Tongyu) using available coefficient and correlation analysis. The research results indicate that:�� copper and zinc abundance of the middle part of Jilin Province outclasses the western part, and both are slightly lower than the background values of Jilin Province, which indicates the potential nutrient deficiency, and the Muller indexes of all samplings are at zero level or the first level, i.e. no soil heavy metal contamination; �� the available form transformation degrees of soil copper and zinc of the middle part of Jilin Province is higher than that of the western part in general but with a relatively strong regional difference; �� available form transformation of soil copper and zinc is positively related to their total content, soil Mo, Ni, Se, MgO and CaO, while available form transformation of soil zinc is negatively related to soil pH, soil Cr, soil Mn and soil P. The distinctions of copper and zinc abundance and available form transformation between different soil types are notable, and black soil is with the highest copper and zinc transformation rate.