The medium and trace element contents in 30 soil samples collected from Burley - tobacco - planting areas of Xuanhan county in Dazhou were analyzed. The results showed that the average contents of exchangeable Ca, exchangeable Mg and available S were 278. 88, 27. 56 and 37. 08 mg/kg respectively. The average contents of available Fe, Mn, Cu, Zn, B and Cl were 63. 72, 55. 96, 0.19, 2.11, 0. 15 and 91.81 mg/kg separately. The contents of exchangeable Ca, exchangeable Mg, available Cu and available B in the soil were deficient, while the contents of available S, Zn, Fe and Mn were abundant in general, yet the content of Cl was high. Therefore, in the production of Burley tobacco, the deficient nutrition elements should be scientifically supplied according to the local conditions, and the application of chlorine - containing fertilizer should be prohibited.%对达州白肋烟主产区宣汉县30个土壤样品的中量、微量元素含量进行了分析.结果表明:交换性钙、交换性镁和有效硫的平均含量分别为278.88、27.56和37.08 mg/kg;有效铁、锰、铜、锌、硼和氯的平均含量分别为63.72、55.96、0.19、2.11、0.15和91.81 mg/kg;该区植烟土壤交换性钙、交换性镁、有效铜及有效硼含量不足,有效硫、锌、铁、锰的含量总体上较丰富,氯含量偏高.在烟草生产上,要因地制宜,科学补充缺乏元素,禁止施用含氯肥料.
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