对辽宁省14万多平方千米面积上不同土壤,采集了三千多个样品,用ICP测定了有效态B(沸水提取)和Cu、Zn、Fe、Mn(DTPA溶液提取),经过分级评价绘制成5幅含量分布图,阐明了不同地区、不同土壤类型间有效态微量元素含量的差异,并结合当地作物生长和肥效反应进行讨论,为辽宁省微量元素肥料合理施用提供了科学依据。 More than 3000 samples were collected from more than 140,000 square kilometers of soil in Liaoning Province. Effective samples B (boiling water extraction) and Cu, Zn, Fe and Mn (DTPA solution extraction) were measured by ICP. The content distribution of five trace elements in different regions and different soil types was clarified, and the differences of available trace elements in different soil types were clarified. Combining with the discussion of local crop growth and fertilizer effect, the results provided a scientific basis for the rational application of trace element fertilizers in Liaoning Province.