Evaluation of trace elements abundance and deficiency in cultivated soil and its influencing factors in Bijie City of Wumeng Mountain

In order to support the needs of the agricultural development of mountain areas, the high precision data of trace elements in cultivated land soil in Bijie City were obtained through 1:50000 geochemical survey of cultivated land quality.B, Mo, Cu, Zn, Mn, Co, I and F were selected as the main research objects to analyze the abundance and deficiency of trace elements in cultivated soil.The statistical results show that the trace elements contents of cultivated soil in Bijie City is generally at a high level, and the mean contents of B、Mo、Cu、Zn、Mn、Co、I and F are 67.10 mg/kg, 2.14 mg/kg, 79.20 mg/kg, 143.90 mg/kg, 1215.00 mg/kg, 30.40 mg/kg, 5.84 mg/kg and 1009.00 mg/kg, respectively.The evaluation results show that the trace elements of cultivated soil in Bijie City are characterized by abundance and excess, of which B, Cu, Zn, Mn and Co are mainly at the enrichment level, Mo above the limit level, I at the high level, and F at the excess level.The overall condition of trace nutrients is good.The abundance, deficiency and distribution of trace elements in cultivated soil in Bijie City are closely related to the parent material, soil pH, soil type and land use mode, among which the parent material is the main influencing factor.This study can provide geochemical support for the agricultural production in Bijie area in the reasonable utilization of soil trace elements, the improvement of crop quality and the development of mountain characteristic agriculture.