曲靖植烟土壤酸碱度及其与微量元素的关系研究

Study on The Relationship between pH And Available Elements in Tobacco Growing Soils in Qu⁃jing

采集曲靖市3586个土壤样本,利用传统统计学的分析方法,分析了曲靖植烟土壤pH值变化和有效铁、有效锰、有效硼、有效锌等有效态微量元素分布特征及其关系。结果表明,曲靖地区9个县市的pH均值在5.00~7.00,马龙县土壤pH均值为5.43,且有61.22%的土壤样本位于偏低水平,其土壤偏酸性。曲靖植烟土壤的有效硼含量均值为0.42mg/kg,处于低水平范围,其中宣威市有50.53%的土壤样本有效硼含量位于极低水平范围。土壤有效锌含量均值为4.05mg/kg为高水平,其中宣威市植烟土壤的有效锌含量均值为7.47mg/kg,说明宣威市的土壤有效锌含量极高。植烟土壤有效铁、有效锰的含量均值分别为57.02mg/kg、58.38mg/kg,均超过了极高水平范围临界值,含量极为丰富。pH值与其他养分均呈现显著或极显著相关关系,从大到小的顺序依次为:有效铁>有效锰>有效硼>有效铜>有效锌。

3586 soil samples were collected from Qujing City.The changes of pH and the distribution characteristics of available Fe,Mn,B and Zn in Qujing tobacco-growing soil were analyzed based on statistical methods.The results showed that mean value of pH of 9 counties and area in Qujing arein the range of 5.00~7.00,and the pH of Malong County soil were 5.43 and 61.22%of the soil samples areof poor level.The average content of available B in Qujing tobacco-growing soil is 0.42mg/kg,which isof poor level.The average content of soil available Zn was 4.05mg/kg,the average content of soil available Zn is 7.47mg/kg,and 71.09%of soil samples arein very high range Which means the soil in Xuanwei has an extremely high level of available zinc.The contents of available Fe and available Mn in tobac⁃co-growing soil are 57.02,58.38mg/kg,which were all over the critical value of very high level range.pH and other nutrients have a significant correlation,the order is:available Fe>available Mn>available B>available Zn.