Abstract: In order to establish an soil quality evaluation method with special geological background in Yimeng Mountain area of Linyi City, Shandong Province, a total of 1 029 soil samples were collected in the southwest of Yinan County, and 29 indexes of N, P, K, B, Mn, Mo, Se, I, Ge, F, Zn, Cu, Co, V, As, Cr, Cd, Hg, Pb, Ni, organic matter, pH, Sr, Na, Ca, Si, Mg, Tl, Ti were analyzed. Based on the analysis and test results, the evaluation system composed of soil nutrient index and environmental index was established. The geochemical evaluation and research of spatial distribution of soil quality in this area were conducted. The results showed that most of the soil quality in the whole area are good and medium (the soil environment is clean, the soil nutrient is rich or medium), the soil fertility in the middle of the study area is good (w(N)>0.10%,w(P)>0.06%,w(K)>2.50%), the fertility in the mountainous areas in the southwest and northeast of the study area is poor (w(N)<0.075%), thus the overall soil quality grade is low. The content of N, B and organic matter in about 80% of the soil of the whole region is not enough to meet the needs of conventional agricultural production. However,the soil environmental quality level in the area is generally good, and the distribution of heavy metals is controlled by the geological background.

Key words: soil quality, geochemical evaluation, Yimeng Mountain area