广西岩溶地区耕作土壤有效态微量元素含量状况及其评价

Contents of available microelements in cropping soil in Guangxi karst area and its evaluation

采集广西岩溶地区有代表性的耕作土壤样品,研究了土壤中硼、锌、铜、铁、锰、钼等微量元素有效态含量状况。结果表明,广西岩溶地区耕作土壤微量元素平均含量有效硼为0.18mg/kg,有效锌为1.30mg/kg,有效铜为2.35mg/kg,有效铁为49.20mg/kg,有效锰为32.94mg/kg,有效钼为0.10mg/kg。广西岩溶地区耕作土壤严重缺硼和钼,比较缺锌或潜在缺锌,而铁、铜、锰含量都较丰富。有效硼、铁和锰的含量与土壤pH值存在显著或极显著的负相关关系;土壤有机质与有效锌、硼、铜、锰之间存在显著或极显著的正相关关系。建议在农业生产上增施硼、钼、锌肥和有机肥料。

The typical cropping soil samples in Guangxi karst area were taken to study the microelement contents of available B ,Zn, Cu, Fe, Mn,Mo in soil. The results showed that the content of available B,Zn,Cu,Fe,Mn,Mo were 0. 18,1.30,2.35,49.20,32.94,0. 10 mg/kg, respectively. Though the cropping soil in Guangxi karst area was abundance in Fe,Cu and Mn,it was seriously in lack of B and Mu,relafively or potentially in short of Zn. The contents of available B, Fe and Mn had a significant or very significant negative correlation with pH. The soil organic matter had a had a significant or very significant positive correlation with available Zn,B,Cu,Mn. The fertilizer with B,Mo,Zn and organic fertilizer should be more applied in agricultural production.