College of Geoexploration Science and Technology, Jilin University, Changchun 130026, China

In order to identify the nutrient level and environmental quality of paddy fields in Wanchang area, and to provide scientific basis and technical support for planting rice in Wanchang area, the soil geochemical survey was carried out, 30 samples were collected from paddy soil in Wanchang area, and 20 elements (indicators) were analyzed. The characterization of the elemental content of soils in the study area was carried out, and the geochemical level for soil nutrients, the geochemical level for the soil environment, and the comprehensive geochemical level of soil quality were evaluated. The results showed that the average values of K content and pH of the soil in the study area were smaller than the background values of Jilin Province, and the average values of 18 elements including N, P, Ca, S, Pb, Zn etc. were bigger than the background values of Jilin Province. The results of the evaluation of soil single element nutrient in the study area showed that the available state nutrient levels of Mn, Zn, Cu, and K increased compared with the total amounts of nutrients level, with Cu increasing the most; the available state nutrient level of N, P, B, and Mo decreased compared with the total amounts of nutrients level, with Mo decreasing the most. The comprehensive level of soil nutrients geochemistry in paddy fields was mainly Level III (medium), accounting for 53.33%, and the low abundance level was caused by the lack of P element; the comprehensive level of soil environmental geochemistry was mainly Level I (clean), accounting for 96.67%, with only slight pollution caused by Cd. The comprehensive geochemical level of soil quality was mainly Level II, accounting for 66.67%. Suggestions were put forward for the rational utilization of soil resources in paddy fields in the study area.

paddy soil   nutrients   environmental evaluation   soil quality evaluation   Wanchang area   Jilin City