广西耕地土壤铜的含量及其影响因素

对2242个采自广西不同类型的耕地表层土壤样品进行有效铜含量分析,结果表明,广西耕地土壤铜的含量比较丰富,全铜含量在1.03~101.18m g/kg之间,平均27.41m g/kg,高于全国和世界平均含量;有效铜含量在0.01~19.19m g/kg之间,平均2.48m g/kg,低于0.2m g/kg缺铜临界值的土壤只占样点的0.49%;成土母质、土壤有机质、土壤pH值和土壤的农业利用方式是影响土壤有效铜含量的主要因素。

Study on Cu content in cultivated soils and its influence factors in Guangxi

The Cu content of 2242 soil top layer samples collected from the different types cultivated land in Guangxi were analyzed.The results showed that the soil Cu content in Guangxi was in a relatively high status,the total Cu content was 1.03-101.18mg/kg,and the average was 27.41mg/kg which is higher than that of soils in China and the world.The available Cu content and its average were 0.01-19.19mg/kg and 2.48mg/kg,respectively,and the number of the samples which available Cu content was lower than the Cu deficiency critical value(0.2)mg/kg accounted for 0.49% of the total.Moreover,soil parent material,soil organic matter,soil pH and agricultural utilization methods of soil were the main factors to affect the content of available Cu in soil.